Table of Content Module 1 Chapter 1: Introduction …………………………………………………………………… 5 Chapter 2: Behaviorism …………………………………………………………………. 23 Chapter 3: Cognitive Social Learning …………………………………………………..35 Chapter 4: Memory & Planning ………………………………………………………….59 Focus Terms for Module 1 ………………………………………………….73 2 LECTURE NOTES 3 4 Introduction Brief History of Study of Animal Psychology o Charles Darwin o George Romanes Founder of comparative psychology Methodology – & laboratory experimental method o Behaviorists seek to by placing animals in barren environments in which they can do little else than what the experimenters want o Edward Thorndike 5 o John Watson o , not observations & collection of anecdotes Behaviorism – eschews reference to terms B.F. Skinner o Ivan Pavlov Animal Wolfgang Kohler Animals’ inner thoughts ( ( ) & feelings ) 6 (Behavioral Biology) – study of animal behaviors o Most ethologists are o Konrad Lorenz , not psychologists 7 Combination of & + neuroanatomy, ecology, & evolution o More interested in Methodology: Fieldwork The days of a few scribbled observations in a notebook are gone nowadays field work is very Data collection is and systematic, typed into handheld digital devices, and complemented with fecal & urine samples that allow DNA analysis & hormone assays They offer hints & suggestions but rarely allow firm - e.g. One may encounter wild chimpanzees who crack nuts with stones, but it is impossible to know how they discovered this technique or how they learn it from one another 8 Carefully-controlled experiments Captive animals (e.g. apes) under enlightened conditions (e.g. a sizeable group in a spacious outdoor area) have the advantage of providing a close-up look at that one can't get in the field Here, animals can be watched and videotaped than is possible in the wild where animals often disappear of the two methods Observations in the field have often inspired experiments in the lab Observations in captivity (e.g. chimpanzees reconcile after fights) have stimulated observations in the field on the same phenomenon Cognitive ethology o of evolutionary psychology, animal cognitive psychology, & ethology o Systematic description + observation of behavior o Every species has its own , its own Umvelt (see next section) which dictates what it needs to know in order to make a living 9 The Importance of "Umvelt" in Psychology of Animals Jakob von Uexküll: Not " - animal point of view " - the habitat that an organism needs for survival An organism's not available, comprehended, & discernible to other species 10 o E.g. some animals perceive ultraviolet light, while others live in a world of smells or like the star-nosed mole, feel their way around underground Nagel: we can never fully understand other species's Umvelt o Nagel: "What is it like to be a bat?" (very famous) o Not trying to know how a human would feel as a bat, but how a bat feels like a bat (whose major sense is which is beyond our comprehension) o Nagel concluded that we would b/c we have no way of entering the subjective life of another species de Waal: Humans can try to o the Umvelt of other organisms Even though we can't feel what other species feel, we can still try to our own narrow Umvelt and apply our imagination to theirs 11 o Humans inhabit the same Umwelt as as we process our surroundings in similar ways - stereoscopic vision, grasping hands, ability to climb & jump, & emotional communication via facial muscles o But ? Every species deals flexibly with the environment & develops solutions to the problems it poses; each one does it differently Anecdotes: The Importance of Stories Some scientists dislike or ignore anecdotes b/c: o “Merely stories”, not “ ” o Not reproducible & too tainted with But systematic analyses of anecdotes can lead to data that are reproducible by that mimic the anecdotal situations Beckoff: anecdotes are central to the study of animal behavior and especially animal emotions b/c the latter As more and more stories are accumulated, a solid behavior data can be developed and this can be used to The more stories gathered showing the same thing, the less likely it will be that has influenced the collection of data or the conclusions drawn What makes a “good” anecdotal account? (Nussbaum) o The author pursues 12 o She displays to a good theoretical end o She neither withholds , nor uses it loosely o She is keenly aware that the animal has but is o She gives an account of the emotions of a specific animal, and not a fanciful of emotion Anthropomorphism & Misrepresentation Anthropomorphism o Tendency to attribute to nonhuman animals , & everyday way of considering animals And as humans who study other animals, we can only describe & explain their behavior using words with which we’re familiar from a point of view o Anthropomorphism is But have to bear in mind that animals are not little people – maybe emotionally satisfying to treat them that way, but must consider psychology of animals 13 When a scientist tries to figure out what’s happening in a dog’s head, she has to be anthropomorphic, but she tries to do it from a Just b/c she says a dog is happy or jealous, this doesn’t mean he’s happy or jealous as humans are o Anthropocentrism is problematic only when the human-animal comparison is a stretch, such as with regards to species Kissing Kissing gouramis don't really kiss in the same way & for the same reasons that humans do - adult fish sometimes lock their protruding mouths together to Apes, however, do after a separation by placing their lips gently on each other's mouth or shoulder & hence kiss in a way & under circumstances that greatly resemble humans kissing Tickling & laughing When young apes are being tickled, they make breathy sounds with a rhythm of inhalation & exhalation that One the term laughter for this behavior as too anthropomorphic 14 o Anthropomorphism is not always as problematic as people think - to rail against it for the sake of scientific objectivity often hides one's discomfort with the notion of When we are considering species like the apes, which are known as " " (humanlike), however, anthropomorphism is in fact a Dubbing an ape's kiss "mouth-to-mouth" contact so as to avoid anthropomorphism deliberately obfuscates the Our terminology should honor the obvious o (Burghardt) – Anthropomorphism’s place in the scientific studies of animals Being anthropomorphic is a to make the thoughts and feelings of other animals accessible to humans Anthropomorphic accounts can be an to behavior Anthropomorphic accounts not necessarily projection of human values or inserting something human into animals, but simply be recognition of & using human language to communicate what we observe 15 E.g. Saying that animals "plan" for the future or "reconcile" after fights is more than anthropomorphic language: these terms propose If primates are capable of planning, they should hold on to a tool that they can use only in the future If primates reconcile after fights, we should see a reduction of tensions as well as improved social relationships after opponents have made up by means of friendly contact Critical anthropomorphism is a valuable source of if it serves as a means rather than an end Misrepresentation o A form of anthropomorphism but one that focuses on an animal’s human qualities as an excuse for killing it, brutalizing it, or being indifferent to its welfare o The animal becomes a projection of our own o This sort of is particularly prevalent in human attitudes to predators, pests, and scavengers – species that either compete with us directly or which survive off the surpluses of human cultures o E.g. wolves – malevolent, merciless, insatiable killer, the archetypal bête noire – extermination and torturing of wolves, leading to their near extinction 16 Anthropocentrism, Human Exceptionalism, Anthropodenial o Seeing animals o Start with human minds & E.g. Are they intelligent or conscious? Do they think or feel? o than anthropomorphism – since we More are human, we can never be entirely free from anthropocentrism o Anthropocentrism sometimes makes us forget that we, humans, are fellow animals too – our species is different, o "Human is the only animal that .... " - most of these claims are o A lot of times when we fail to find a capacity in a given species, instead of congratulating ourselves on our human exceptionalism, we should ask ourselves if (1) we have o something & (2) Examples: Gibbons Once considered backward primates (the " ") even though they belong to the same large-brained family as humans & apes 17 When presented with problems that required them to choose between various cups, strings, & sticks, they compared to other species Tool use was tested by dropping a banana outside their cage & placing a stick nearby: all they had to do to get the banana was pick up the stick to move it closer, but they (unlike chimpanzees & many monkeys) Reason why they can't do it? They are exclusively they are ; that propel themselves through trees by hanging by their arms & hands Gibbon hands, specialized for this kind of locomotion, act more like hooks than the versatile grasping & feeling organs of most other primates Beck: Instead of presenting objects lying on a surface to them, he elevated them to the animal's them easier to grasp The gibbons solved all these problems demonstrating the same intelligence as other apes Their earlier poor performance had had more to do with than with their mental powers. Elephants For years elephants were believed to be using tools 18 , making The pachyderms the same aforementioned out- of-reach banana test, leaving the stick alone Their failure could not be attributed to an from a flat surface b/c elephants are ground dwellers & pick up items all the time, sometimes tiny ones Conclusion - elephants didn't get the problem Problem: Elephant's grasping organ is also its - elephants use their trunks not only to reach food but also to sniff & touch it But picking up a stick ; even when they bring the stick close to the food, it impedes their feeding & smelling it Alternative experiment (Foerder & Reiss) Hang food above an elephant's enclosure just out of his reach Several sticks & a sturdy square box were presented to the elephant The elephant but began with his foot many times in a straight line until it was right underneath the fruit He then stood on the box with his front legs, which enabled him to reach the food with his trunk 19 Elephants - if they are the right ones Anthropodenial (de Waal) o - a priori rejection of humanlike traits in other animals or animallike traits in us o Anthropomorphism & anthropodenial have an The : another species is to us, the anthropomorphism will assist our understanding of this species and the will be the danger of anthropodenial Conversely, the more a species is from us, the that anthropomorphism will propose questionable similarities that have come about independently e.g. saying that ants have "queens," “soldiers," and "slaves" Biocentrism & Anthroharmonic Approach Shift of paradigm from anthropocentrism to biocentrism 20 o Biocentrism Humans are members of a along with all other species, & on equal terms. This community consists of a between all members, both physically, & in terms of relationships with other species Every organism is a " ", i.e., each organism has a purpose and a reason for being, which is inherently "good" or "valuable" Humans are not to other species 21 Anthroharmonic Approach (Scharper) o An approach to the study of o Acknowledges the importance of the human and makes the human fundamental but o Humans and animals are , and we complete one another 22 Behaviorism 1. (Pavlovian/Reflex/Respondent/Type I conditioning) 2. (Instrumental/Type II conditioning) 1 and 2 = o “ ” o : Stimulus-Response Animals’ ability to recognize in the world around them Powerful mechanism that animals use extensively to steer themselves through life Animals may or may not understand the relation between cause & effect; only , not understand Classical Conditioning Pavlov's original experiment 23 o In his initial experiments, Pavlov presented a (bell ring) and then gave the dog food; after a few repetitions, the dogs started to salivate in o to the stimulus. 3 Stages of Classical Conditioning 24 Pavlov called: o The food - (US) b/c its effects did not depend on previous experience o The response to the US (salivate) – (UR) o The stimulus (bell ring) - (CS) b/c its effects depend on its association with food o The response to the CS (salivate) (CR) Definitions o Classical conditioning occurs when a conditioned stimulus ( paired with an unconditioned stimulus ( o The conditioned stimulus (CS) is usually a sound of a tuning fork) o The unconditioned stimulus (US) is (e.g., the taste of food) 25 ) is ) stimulus (e.g., the o The unconditioned response (UR) to the US is an (e.g., salivation) o After is repeated (some learning may occur already after only one pairing), the organism exhibits a conditioned response (CR) to the CS when the CS is presented alone 26 Operant Conditioning (Instrumental Conditioning) Introduction o Operant Conditioning deals with operants – that have an effect on the surrounding environment o Thorndike’s Behavior which is reinforced tends to be (i.e. strengthened) Behavior which is not reinforced tends to be (i.e. weakened) o B.F. Skinner - father of operant conditioning 27 Studied operant conditioning by conducting experiments using animals which he placed in a " " Concepts and procedures o Core tools to modify operant behavior: Reinforcement - stimulus that probability that a preceding behavior will be repeated reinforcement When a behavior (response) is followed by the (hence "positive") of a stimulus ("positive" does not necessariily mean "good" or "favorable") This E.g. if a rat in a Skinner box gets food when it presses a the frequency of that behavior lever, its rate of pressing will go up 28 reinforcement (escape) When a behavior (response) is followed by the of a stimulus (which is aversive, hence its removal is "rewarding" to the animal or person) ("negative" – removal of a stimulus) This E.g. In the Skinner box experiment, the aversive stimulus that behavior's frequency might be a continuously sounding inside the box; negative reinforcement would happen when the rat turning off the noise 29 , Punishment - stimulus that probability that a preceding behavior will be repeated punishment When a behavior (response) is followed by the of a stimulus (e.g. a shock or loud noise) ("addition" - hence positive) E.g. Every time a dog barks, his owner squirts water on his face. This results in a n that behavior (penalty or punishment by contingent withdrawal) When a behavior (response) is followed by the of a stimulus (removal, hence negative) e.g. taking away a dog's toy following an undesired behavior This results in a in that behavior 30 Stimulus Presented Stimulus Removed/Withheld Behavior Encouraged Behavior Suppressed Stimulus Presented Behavior Encouraged Behavior Suppressed 31 Stimulus Removed/Withheld When a previously reinforced behavior is with either positive or negative reinforcement During extinction the behavior becomes E.g. a rat is first given food many times for lever presses; in "extinction", no food is given → rat continues to press and eventually stops (lever pressing is said to be "extinguished") 32 Practical applications of operant conditioning (successive approximation) o Conditioning method used in & in teaching non- verbal humans o The trainer starts by identifying the desired final (or " behavior o Next, the trainer chooses a behavior that the animal or person with some probability 33 ") o The form of this behavior is then gradually changed across by reinforcing behaviors that approximate the target behavior more and more closely. o When the target behavior is finally emitted, it may be strengthened & maintained by the use of a 34 Cognitive Social Learning Problems with behaviorism Only concerned with , as opposed to internal events like thinking and emotion (e.g. Skinner did not say that the rats learned to press a lever b/c they wanted food) Behaviorism fails to take into account the role of in learning → incomplete explanation of the learning process in humans & animals Despite the range of potential problems that can confront an animal, behaviorists argue that they are all solved in the same manner – animals are assumed to until by the correct response is made and reward is forthcoming Cognitive-social learning Learning is - it is a cognitive process that takes place in a social context Cognitive processes – processes (e.g. thinking, knowing, problem-solving, remembering) Reinforcement plays a role in learning but is for learning Examples of cognitive-social learning o 35 o o o o Insight Definition: o An that leads to a problem being solved – the change in behavior is sometimes attributed to a period of thought followed by a flash of inspiration o Insight – “what leads to what” ; confirmation of expectancies – leads to learning o Therefore learning is not just about simple conditioning, but generated by confirmed expectations (e.g. knowing how to navigate the maze or how to use tools after exploring them) Characteristics of insight learning o Transition from pre-solution to solution is o Insight based on performances o Solutions gained by insight are o Solutions gained by insights are ( to other problems ) 36 Wolfgang Kohler: by chimpanzees – not just o Insight plays a role in stumble on solutions through trial and error, but a of problems o Examples: A banana was hung from the roof of an enclosure, out of reach of the chimps; the enclosure contained three packing boxes Initially a chimp (named Sultan) would jump or throw things at the banana or drag humans by the hand toward it in the hope that they’d help him out, or at least be willing to serve as a footstool. If this failed, he would sit around for a while without doing anything until he might hit at a All of a sudden, Sultan stacked three boxes on top of each other (the heaviest one at the bottom and the smallest one on top) & reached the banana 37 Sultan was put inside an enclosure & some pieces of fruit were placed out of reach beyond the bars Sultan was provided with 2 hollow bamboo sticks, each of which was too short to reach the highly desired food items At first Sultan tried to reach the fruit with his hands, then with each of the sticks separately – all these efforts were futile & Sultan gave up Then Sultan started playing with the sticks for a while before inserting the thinner of the two sticks inside the thicker one – armed with this now lengthened stick, Sultan rushed back to where the fruit was & raked it all in rapidly Insight: A sudden insight may explain how Sultan put together what he knew about bananas, boxes, and sticks to produce a that would take care of his problem Kohler ruled out imitation and trial-and-error learning, since Sultan had had with these solutions nor ever been rewarded for them The outcome was unwaveringly in which the ape kept trying to reach his goal despite the numerous stacking errors resulting in the collapse of his towers Once a solution was discovered, the ape found it easier to solve similar problems, as if they had learned something about the 38 Other examples of insight o Younger female chimpanzees collect water in their mouths for an aging female chimpanzee who can barely walk anymore, spitting it into her open mouth so that she doesn’t have to walk all the way to the spigot o Goodall: Madame Bee, a wild chimpanzee, had become too old and weak to climb into fruiting trees; she would patiently wait at the bottom for her daughter to carry down fruits, upon which the two of them would contentedly munch together o In such cases, apes grasp a problem and come up with a fresh solution, but the striking part here is that they perceive another ape’s problem ( ) Causal Inference & Folk Physics Causal inferences o The term “insight” is now in discussions of problem solving by animals o As an alternative, it has been proposed that animals have some understanding of & that they can draw inferences based on this understanding to solve problems Chimpanzees: Premack o A single subject would be shown an array of objects as the following: To , the chimpanzee was required to replace the strange shape in the upper row with the knife from the lower row 39 The choice of the knife was intended to reveal that the ape understood this object causes an apple to be cut in half o Results: o Even when the apple was replaced by & a ball cut into pieces, the subjects still made the correct choice even though the subjects had rarely seen a knife & a ball together Bird o Heinrich et al: raven Experiment 1: Hand-reared ravens were presented with a piece of meat hanging from a perch The meat could not be obtained by flying towards it & clasping it in the beak; instead, to reach the meat, some birds settled on the perch where the string was attached & grasped the string below the perch with their beak & To stop the meat falling back, they placed a foot on the string & then let it drop from their beak whereupon they bent down to grasp again the string below the perch 40 This operation was repeated until the meat was near enough to be grasped directly with the beak 41 Experiment 2: Meat could be retrieved by standing on the perch & Birds who had mastered the were also adept at mastering this new task Birds of pulling string never mastered this second task Conclusion Ravens have some kind of understanding of relationships, i.e. an apprehension of a cause-effect relations between string, food, and certain body parts (appreciation of folk physics) Latent (Exploratory) Learning Tolman: learning in the absence of an obvious reward o Learning is , not shown in behavior o Rats can learn a route in a maze without obtaining reinforcement: Group 1 (Control group) – rat was fed upon reaching goal Group 2 – not rewarded at all Group 3 – not rewarded for trials 1-10, but rewarded on trials 11-22 Group 4 – rewarded on trials 1-10, but not rewarded on trials 11-22 42 o Results Group 1 – running the maze than Group 2 due to availability of the reward Group 3 – key condition; almost immediately after receiving food, Group 3’s errors dropped to the level of Group 1 The rats how to navigate their way through the maze all along, yet they weren’t sufficiently motivated to do so until a reward was presented They were able to use a cognitive map of the maze when the rewards were introduced Group 4 - Group 4’s errors increased quickly when the possibility of a reward was removed, again illustrating the of rewards Exploratory learning o “ ” – stimuli without patent reward o Motivation in latent learning – get to know the 43 o Very important for organisms in real life – after establishing the (e.g. food or a hole), the animal can reasonably expect it to be there when it returns Imprinting Definition o learning (occurring at a particular age or life stage) that is rapid & independent of the consequences of behavior o Imprinting = o “ ” – during a particular short period of its ontogenesis (development), an organism suddenly “learns” what to do o are released in response to learned stimulus o Most imprinting promotes animals & shapes their future breeding activities Filial imprinting o When a young animal acquires several of its from its parent. o Nidifugous birds (e.g. chickens, ducks, geese) imprint on their parents & 44 o Lorenz demonstrated how incubator-hatched greylag geese would imprint on the first suitable moving stimulus they saw within a (between 13 to 16 hours shortly after hatching) o The goslings would imprint on Lorenz himself (to be more specific, on his wading boots) o Filial imprinting of birds was a primary technique used to create the movie Winged Migration (Le Peuple Migrateur), which contains a great deal of footage of migratory birds in flight – the birds imprinted on handlers, who wore yellow jackets and honked horns constantly; the birds were then trained to fly along with a variety of aircraft, primarily ultralights Social Learning Diet Selection & Foraging – an increase in the tendency o to approach an object as a consequence of observing another animal interact with it McQuoid & Galef (1992) – Burmese jungle fowl Hungry fowl were allowed to explore an enclosure in which four bowls were placed in fixed positions Food was consistently available in one of these bowls and eventually all the subjects approached this bowl whenever they entered the enclosure Towards the end of this training, another group of fowl ( watched the first group ( ) ) as they ate from the bowl 45 When the observers were themselves permitted into the enclosure, they showed a for the bowl from which the demonstrators had been seen to eat o Neophobia – a reluctance to approach something that is novel Galef et al (1) A rat was allowed to eat food with a distinctive flavor (either coca or cinnamon) An rat was then placed in the company of the demonstrator for 30 minutes, but in the absence of any food, before being allowed to choose between food flavored with either cocoa or cinnamon The observers preferred the food that was of as that consumed by the demonstrator This preference has been shown to occur even if the demonstrator eats the flavored diet up to 4 hours before its encounter with the observer After a single interaction with a demonstrator, the endures for about 12 hours If the interaction between the observer and demonstrator is repeated on a number of occasions, or the interaction is repeated with a number of different demonstrators, then the preference lasts considerably Once acquired, the flavor preference is subsequently exposing the animal to other types of food 46 by Galef et al (2) An observer rat was placed into a bucket of the apparatus, and an was placed into a wire-mesh basket Some demonstrators had food dusted on their faces and others had food placed directly into their stomachs through a tube In both cases, the observers subsequently showed a that had just been fed to the demonstrator However, if the of the demonstrator was dusted with food, and placed foremost in the basket, then only a for the food was demonstrated If a , rather than a rat, was placed in the basket, then despite being dusted with food, there was that this resulted in a change in the attractiveness of the food Conclusions: The demonstrator conscious if it is to encourage the development of a food preference in another rat 47 The observer must , and preferably its front rather than its rear end o Social influences on diet selection have been demonstrated in blackbirds, sheep, goats, cats, hyenas, pigs, rabbits, mice, & monkeys Choosing a Mate o Female guppies were allowed to observe 2 males: one male was alone & the other with a female companion – when the observer was given a choice between the 2 males, she preferred the one o Similar findings for Japanese quail – however, if the procedure is reversed so that a is given a choice between a female he has seen in isolation and a female he has seen courting & mating with another male, then the observer will tend to prefer the female he had seen Fear of Predators o Monkeys’ fear of snake When an adult free-ranging monkey suddenly encounter a snake, it will attempt to flee from the snake, its facial expressions will indicate fear, it will look at the snake, and it will make specific alarm calls A monkey that has been reared in the laboratory will show virtually Fear of snakes by monkeys is not innate but 48 Laboratory-reared monkeys of a wild- reared monkey to a snake – on seeing its reaction, the observer responds in a similar way; if subsequently the observer is exposed to the snake by itself, it will show the same reaction too Copying Behavior Imitation & mimicry vs. Contagious behavior – result in animals performing o Both new responses, & these responses are arbitrary, rather than being closely tied to species-typical reactions to certain stimuli – occurs when the response of one o animal triggers the same response in another animal (e.g. chorusing in dogs & roosters) true imitation Humans have to imitate each other without there being any need for deeper reason e.g. yawning & laughing Birds feeding in flocks Imitation o Old definition = doing an act from Naturalistic evidence Blue tits & great tits in Britain 49 Break through the foil tops of milk bottles to drink the cream at the top This skill is believed to have originated in a small group & its spread to the rest of the population has been attributed to imitation Primates Japanese macaque monkeys wash sweet potatoes before eating them “Imo” was observed to wash potatoes in the ocean before eating it – removed from potato Over the following years, many more monkeys took up potato washing habit Ivory Coast chimpanzees use stones to Examples of " " - habits learned from others Laboratory studies: Bidirectional control procedure: to demonstrate true imitation (Heyes & Dawson) Two subjects (rats in original study) put into a box containing two compartments separated by a transparent wall 50 Animal on one side of the partition (the “ ”) has a joystick, which it can operate by pushing to the left or the right Some demonstrators are trained to push the joystick to the left, for which they receive a reward, others are trained to push it to the right to obtain their reward. Once a demonstrator knows what it has to do, a second animal – the – is placed in the other half of the box, where it can watch the demonstrator When the observer has had a few sessions of watching the demonstrator, it is given its own chance in the demonstrator’s half of the box Rats who observed other rats push the joystick to the left to push it to the left themselves - & similarly for rats who observed the joystick pushed to the right o New definition of imitation - " "? Requires individuals to copy another's specific techniques to achieve a specific goal Merely duplicating behavior is not enough - it has to be done with While imitation is common in lots of animals according to the old definition, true imitation is Examples: Apes & children were prompted to imitate an experimenter - they'd watch a human model open a puzzle box or rake in food with a tool 51 While the children copied the demonstrated action, hence the conclusion that other species lack imitative capacities and cannot possibly have culture Problem: anthropocentrism Whether apes imitate us or not is wholly beside the point For culture to arise in a species, all that matters is that its members pick up habits Two ways to make a fair comparison in this regard: 1. Raise apes in a human home so that they are as as children around a human experimenter 2. - to test a species with models of its own kind Human-raised apes As good at imitating humans as are young children - apes, like young children, are and prefer to copy the species that raise them Under most circumstances, this will be their own kind, but if reared by another species, they are prepared to imitate that one as well Using human as models, they to brush teeth, ride bikes, light fires, eat with knife & fork (see mimicry below) Other examples: dogs raised by cats show feline behavior such as sitting in boxes, crawling under tight spaces, licking their paws to clean their face 52 Horner & Whiten: working with human-raised orphan chimps Experimenter poked a stick into holes in a large plastic box, going through a series of holes until a candy would roll out; but only one hole mattered If the box was made of black plastic, it was impossible to tell that some of the holes were just for show; a transparent box, on the other hand, made it obvious where the candies came from Handed the stick and the box, young chimps mimicked only the , at least with the transparent box The children, on the other hand, mimicked that the experimenter had demonstrated, including - they did so even with the transparent box, approaching the problem more like a magic ritual than as a goal-directed task Chimps fit definition of true imitation better than children as they were showing - the sort that pays close attention to goals and methods Children only showed dumb copying or indiscriminate copying or - fits human species's purported reliance on culture b/c it makes us imitate behavior regardless of what it is good for; we transmit habits in full without every individual making their own ill-informed decisions 53 The Conspecific approach (de Waal & Whiten) When chimps were given a chance to watch one another - apes truly do ape, allowing behavior to be within the group Katie imitating her mother, Georgia who had learned to flip open a little door in a box, then stick a rod deep into the opening to retrieve reward Katie had watched her mother do this five times, following her every move and smelling her mouth every time she got a reward After her mother was removed to another room, Katie could finally access the box herself; and even before the experimenter had added any rewards, she flipped open the door with one hand and inserted the rod with the other Mimicry o of a demonstrator when it does not result in any tangible reward: It seems some arbitrary responses can be acquired through rather than by trial and error Reward is - i.e. not necessary for the response to be performed repeatedly "Habits" & "fashions" - spread without any associated rewards, social learning is truly social; it is about conformity instead of payoffs 54 o Bonding- and Identification-based Observational Learning ( Primate social learning stems from ) (de Waal) born from the desire to act like others & to fit in Explains why apes imitate their own kind than the average human, and why, among humans, they imitate only those whom they feel close to Also explains why young chimps, especially females, learn so much from their mothers, and why high-status individuals are favorite models (ref: the Beckhams, Kardashians, & Biebers) o Examples of intra-species mimicry Primates: Mimicry is common in e.g. hairstyles, accents, dance steps, hand gestures Macaques on the Arashiyama mountaintop in Japan customarily together - the young learn to do it without any reward other than perhaps the noise associated with it Kohler: apes invented all the time e.g. marching single file around & around a post, trotting in the same rhythm with emphasis on one stamping foot, wagging their head in same rhythm, all acting in synchrony as if in a trance 55 In Zambia, scientists followed the - one female was the first to stick a straw of grass into her ear, letting it hang out while walking around and grooming others; over the years, other chimps followed her example with several of them adopting the same new "look" of some wild chimpanzee communities, in which two individuals hold hands above their heads while grooming each other's armpits with their other hands An infant male chimp may mimic the of the alpha male who always bangs a specific metal door to accentuate his performance Horner: spread brightly colored plastic chips around in an enclosure, which the chimps could collect & carry to a container in exchange for rewards; exposed to the sight of a top-ranking group member trained to drop tokens into one container & a bottom-ranking one trained to use a different container, the colony massively followed in the footsteps of the member Other species Imitations in monkeys, dogs, corvids, parrots, and dolphins Dogs vs. wolves: conspecific approach Instead of following human instructions, both dogs and wolves saw a member of their own species manipulate a lever to open the lid of a box with hidden food 56 Next, they were allowed to try the same box themselves The wolves the dogs - wolves may be poor at following human pointing, but when it comes to picking up hints from their own kind, they beat dogs rather than cognition - wolves watch one another more closely as they rely on the pack for survival, whereas dogs rely on us o Other examples of mimicry Chimpanzee learned to sharpen pencils, use sandpaper, wash dishes, wipe its bottoms Parrots & mynah birds mimicking human speech Seals can mimic human speech Mechanisms of imitation & mimicry o Rizzolatti et al: discovery in monkeys of , which have the property of firing either when the animals makes a particular action, or when it observes the same action being made o When one animal a response, a mirror neuron will be activated and excite the neurons controlling the same response in the observer o Imitation is a bodily process facilitated by o These neurons, significantly (and ironically), were discovered not in humans but in macaques 57 58 Memory & Planning Memory Spatial memory Short-term memory Long-term memory Prospective memory (planning) Spatial Memory (Olton) – for rats o Description A central area with a number of arms running off it; at the end of each arm a small piece of food is hidden in a food cup Animal’s task is to run down each arm and as efficiently as possible 59 Normally the food, once taken, is not replaced by the experimenters, so the rat must it has been down in order not to waste time & energy returning to arms in which the cup has already been emptied Different numbers of arms can be attached to the central area, but is the number commonly used in memory research Animal can be detained in the central area by means of small doors operated by remote control by the experimenters - this enable them to test the rats can remember which arms they have been down o What can be tested? Capacity Capacity of a rat’s STM can be readily tested in the radial arm maze by until the rat starts to make errors In a standard sized radial maze of 8 arms, rats to an arm they have already visited Numerous control experiments have demonstrated that rats really do use memory to which arms they have visited (e.g. they do not scent-mark arms they have already been) Rats do simply go around the maze clockwise or anticlockwise – to a human observer their activity seems fairly random If more than 8 arms are used, accuracy starts to can still perform above chance level within 17 or 24 arms 60 ; they But as the number of arms increases, they start to simplify the task by such as always turning to the right when leaving an arm Duration How long animals’ memory in those STM tasks can last? Rats working in the 8-arm radial maze were from the maze after making their 1st 4 choices After a delay of 4 minutes to 24 hours, they were brought back to the maze to finish their task – after a gap of up to 4 hours, but after 8 or more hours, Water maze (Morris) o A (1.3 m in diameter); water made opaque by addition of milk powder; hidden beneath the surface of the water is an escape platform; no food is used to motivate the rat, the desire is to escape from the water-filled vat is motivation enough o Rats are swimmers & are highly motivated to find the hidden platform, which saves them from having to swim any longer 61 o The ingenuity of this maze is that it gets around the problem of (each time a rat is put in the water it can be assumed to be equally motivated to find the hidden platform: in a more orthodox, food-motivated maze an animal may become less motivated as its hunger abates) o The water maze also prevents all possibility of the rat finding its way by using (e.g. by scent marking the parts of the maze it has already explored) o The maze’s ensures that the rats must be navigating solely on the basis of whatever is visible outside the maze (door, windows in the lab) & their memory for where they have already swum in the maze o Problem: The rat's memory is tested Short-Term Memory: Matsuzawa & Inoue on Chimpanzee The Test o Test 1: This test included 3 5-y.o. chimps who were taught the order of Arabic numerals , and a dozen human volunteers. 62 Participants saw nine numbers displayed on a computer screen – when they touched the first number, the other eight turned into the test was to touch all these squares in the order of the numbers that used to be there Results: The chimps, while than the people, could do this One chimp, Ayumu, did the best. o Test 2: Subjects: Ayumu & 9 college students Five numbers flashed on the screen were replaced by white squares. The challenge, again, was to touch these squares 63 before they Results: When the numbers were displayed for about 7/10th of a second, Ayumu and the college students were both able to do this correctly about of the time. But when the numbers were displayed for just 4/10th or 2/10th of a second, Ayumu was . The briefer of those times is too short to allow a look around the screen, and in those tests Ayumu still scored about 80%, while the humans' scores to 40%. That indicates Ayumu was better at taking in the of numbers at a glance Even with six months of training, three students to the three young chimps Explanation o Human ancestors much of this skill over evolutionary time to make room in the brain for gaining language abilities o The youth of Ayumu and his peers – the memory for images that is needed for the tests resembles a skill found in , but which dissipates with age The young chimps performed than older chimps in the new study Ayumu's mom did than the college students 64 o Implications Ayumu has violated the dictum that, without exception, tests of intelligence ought to confirm Old thinking: humans command whereas animals command very few abilities (all of which are adaptations restricted to a single goal or activity) Hauser: “ ” – the gap between human and animal cognition, even a chimpanzee, is greater than the gap between a chimp and a beetle! Evolution stops at the human head We descend from the apes in body but - something major must have happened after we split off from the apes; an abrupt change in the last few million years This idea remains in much of the social sciences, philosophy, and the humanities It views our mind as so original that there is no point comparing it to other minds except to confirm its However, in biology, neuroscience, medical increasingly psychology, is now the default assumption 65 science, and The case of bipedalism: Previously, we made a big deal of human’s while ignoring the many animals (from chickens to hopping kangaroos) that move the same way At some savanna sites, bonobos walk entire distances upright through tall grasses, making confident strides like humans Bipedalism is really as it has been made out to be The distress Ayumu’s caused in the scientific community was of the same order as when, half a century ago, DNA studies revealed that humans barely differ enough from bonobos and chimpanzees to deserve their own genus Long-Term Memory Episodic memory – the recall of what happened at o which place and at what time – the three W’s of events: what, when, and where o Rats running radial arm maze & water maze o Tinklepaugh on macaque monkey A macaque watched either a lettuce leaf or a banana being placed under a cup; as soon as the monkey was given access, she ran to the baited cup 66 If she found the food that she had seen being hidden, everything proceeded smoothly; but if the experimenter had replaced the banana with lettuce, the the reward; she’d frantically look monkey only around, inspecting the location over and over, while angrily shrieking at the experimenter o Martin-Ordas on chimpanzees and orangutans She gave the apes a task that required them to find the to fetch either a banana or frozen yogurt – apes had watched tools being hidden in boxes, after which they needed to pick the right box to get a tool for the task , after the apes had gone through scores of other events and tests, they all of a sudden encountered the same person, presenting the same setup in the same rooms of the building Those who had the previous experience knew right away what tool to use and where to look for it – they and they solved the problem in a matter of seconds Food-caching birds o 2 key features of food-caching birds’ natural behavior Birds rely on memory to In the wild, some food-storing species (e.g. scrub jays) cache insects & other perishable items in the wild – therefore useful for them to encode & recall information about has been cached 67 , as well as o Clayton & Dickinson (1998) “wax worms” Jays were allowed to cache & recover (wax worm larvae) & peanuts Jays show a for caching, recovering, & eating fresh wax worms when given both worms and peanuts Worms over time, so if they are left for a period of 5 days or so, they become rotten and unpalatable If jays remember when they cached as well as what they cached and where, then they should worms when they were cached just a few hours ago However, they should the worms if the worms were cached several days ago & have had time to rot Findings – jays from worms to peanuts after long retention interval (124 hours), but occurred after short retention interval (4 hours) 68 such reversal Implication The switch in preference from worms to peanuts after the long retention interval required the birds to recognize a particular cache site in terms of both its & the that had elapsed between caching & recovery This demonstrates recall of information about “ (peanuts & worms) were cached, “ stored, and “ ” items ” each type of item was ” (short vs. long interval) the worms had been cached. Pigeons (Vaughan & Green) o Pigeons were trained in Skinner boxes to discriminate between (“squiggles”) o In one experiment, the slides had drawn on them; in another, the slides were taken around the Cambridge, Massachusetts, area o In each experiment, the pigeons were trained using a procedure to respond to one stimulus in each pair (the positive stimulus), & to refrain from responding to the other stimulus – the choice of which stimulus in each pair was positive and which was negative was completely arbitrary o With sufficient training (nearly 1000 daily sessions for the squiggles, about 850 for the photographs), the birds reliably chose the in each pair 69 o They were then given a break for in the case of the squiggles & in the case of the photographs before being retested o On retesting they showed a of which were the positive and which were the negative stimuli Prospective Memory (Planning) Behaviors Naturalistic Observations: Bonobos at Lola ya Bonobo (jungle sanctuary in Kinshasa) o Lisala the Bonobo picked up an enormous 15-pound rock and lifted it onto her back; then carried it on her shoulders while her baby clung to her lower back o Lisala walked all told almost 10 minutes, only interrupted once when she put down the rock and picked up some palm nuts that are extremely tough - before she reached her destination, which was a large slab of hard rock o She cleared if of debris with a few wipes of her hand, then put down her rock, her infant, and the palm nuts o She set out to crack the palm nuts, placing them on the large anvil while banging them with her 15-pound rock as a hammer o She spent about 15 minutes on this activity, then left her tool behind o Purposeful & future-oriented behavior It is hard to imagine that Lisala had gone through all this trouble , which she must have had well before she picked up the nuts 70 She probably knew where to find those, hence planned her route via this location, to end up at a point that she knew had a hard enough surface for successful cracking This planning is different from, say squirrels collecting nuts in the fall & hiding them for retrieval in winter - because it is based on , not evolved tendency found in all members of the species Experiments o Scrub jays (Raby) Experiment 1: Raby offered jays an opportunity to store food in two compartments of their cage that would be during the night The next morning they would get a chance to visit only one of the two compartments One compartment had become associated with , since the birds had spent mornings there without breakfast The second compartment was known as the "breakfast room" because it was every morning Given a chance in the evening to cache pine nuts, the birds put three times as many nuts in the first room as in the second, thus they might suffer there Experiment 2 The birds had learned to associate both compartments with different kinds of food 71 Once they knew what kind to expect, they tended to store a in each compartment in the evening This guaranteed a breakfast if they ended up in one of those compartments next morning Conclusions - when scrub jays stash away food, they do not seem guided by their present needs and desires but rather by the ones they in the future 72 FOCUS TERMS 73 74 Psychology of Animals: Module 1 Focus Terms 1. Introduction Romanes (comparative psychology); Pavlov & Skinner (behaviorism); Kohler (cognitive psychology); Lorenz (ethology) Ethology: most ethologists are zoologists (e.g. Conrad Lorenz), use laboratory & field science Fieldwork: systematic & scientific; continuous data collection; offer hints & suggestions but rarely firm conclusions; not better or worse than experiments Carefully-controlled experiments: close-up look at naturalistic behavior; animals watched more fully; stimulate observations in the field; not better or worse than fieldwork Umvelt: cognitive ethology; Nagel – we can never fully understand other species’s Umvelt; de Waal – we can try to understand other organism’s Umvelt Anecdotes: most scientists who study the psychology of animals no longer believe that anecdotes should be avoided at all costs. Anthropomorphism - inevitable & involuntary Anthropocentrism: seeing animals from humans' perspective; opposite of biocentrism Anthroharmonic approach: refuses to acknowledge the fundamental importance of human beings in the world. Human exceptionalism: e.g. “Human is the only animal that …. “ 2. Behaviorism Behaviorism: black box approach; associative learning; reductionistic Classical conditioning: - reflex conditioning o Unconditioned stimulus (US), unconditioned response (UR), conditioned stimulus (CS), conditioned response (CR): US - biologically potent (e.g. the taste of food) CS - usually a neutral stimulus (e.g. the sound of a tuning fork) 75 UR – e.g. Pavlov’s dog salivated to sight & smell of food Operant conditioning o Positive reinforcement, negative reinforcement (escape learning), positive punishment, negative punishment o Shaping (successive approximation) 3. Cognitive Learning & Social Learning Problem with behaviorism: (1) only concerned with observable behaviors (2) fails to take into account role of inherited & cognitive factors in learning Insight o Solutions gained by insights retained longer than those gained by trial-&error. o Kohler: block stacking chimpanzee o Goodall: aging wild chimp “Madame Bee” got her food delivered by her daughter o Premack’s chimpanzee: causal inference o Heinrich’s raven Folk physics. Means-end relationships. May be explained by trial-&-error learning. Latent (exploratory) learning: Tolman’s experiment: Group 3 Rats were not rewarded for trials 1 to 10, but rewarded for trials 11 to 22 Showed least number of errors in running the maze at the end of the 22day period Exploratory learning "Indifferent stimuli" Enables an animal to know its surrounding To locate "commodity" (e.g. food) Imprinting Conditioning, insight, instinct 76 Phase sensitive learning Ontogenic insight: abilities to learn to do things during a short period immediately after birth Social Learning o Galef's experiments: Social learning can overcome neophobia Experiment 1: Observer rat's food preference still occurs even if demonstrator eats flavored diet up to 4 hours before encounter with observer After single interaction with demonstrator, acquired preference endures for about 12 hours. Once acquired, flavor preference hard to disrupt by subsequent exposure to other types of food Experiment 2: Observer must interact with demonstrator. Demonstrator can be unconscious. More effective if observer interacts with front, not rear, end of demonstrator. o o Social learning in mate selection in guppies & Japanese quails Female guppy observers prefer males seen with female companion. Male Japanese quail observers prefer female seen in isolation. Social learning of fear of snakes in monkey Monkeys reared in laboratory show no fear of snakes Copying behaviors o Contagious behavior Species-typical reaction – chorusing in rooster Social facilitation – birds feeding in flock o Imitation Arbitrary responses 77 Examples: blue tits breaking through foil top of milk bottles to drink cream; Japanese macaque monkeys washing sweet potatoes before eating; Heyes & Dawson’s bidirectonal experiment “True imitation” – intentionality, insight, comprehension; very rare Human-raised young chimpanzees: as capable as imitating human adults as young children; only mimicked necessary moves (Horner & Whiten) unlike human children who mimicked everything De Waal & Whiten’s conspecific approach: faithfully-transmitted behaviors between Katie & Georgia o Mimicry All about conformity; reward is secondary, not based on trial-&-error De Waal’s BIOL (Bonding- and Identification-based Observational Learning) can explain: why apes imitate their own kind far better than the average human. why, among humans, apes imitate only those whom they feel close to. why young chimps, especially females, learn so much from their mothers Demonstrated by Horner’s brightly colored plastic chips experiment o Mirror neurons (Rizzolatti): neurological mechanism for imitation & mimicry 4. Memory & Planning Spatial memory o Radial maze: Invented by Olton, most common - 8 arms Problem of motivation esp. when rat not hungry Measures capacity & duration of STM o Water maze: advantages Gets around problem of motivation Devoid of local cues (e.g. scent) Short-term memory o Matsuzawa & Inoue experiment 78 Young chimpanzees > College students Young chimpanzees > Old chimpanzees College students > Old chimpanzees Young children > College students o Ayumu’s photographic memory stunned the scientific world – b/c it challenges the notion of humaniqueness Long-term memory (LTM) o Episodic memory: demonstrated by Tinklepaugh’s experiments on macaque monkeys & Martin-Ordas’s experiments on chimpanzees & orangutans o Clayton & Dickinson experiment: jays’ LTM for 3 “wh” information What – perishable worm vs. non-perishable peanuts When – recently cached or cached long time ago Where Prospective memory o E.g. Lisala (bonobo in Kinshasa) carrying a heavy stone on her shoulders o Raby’s scrub jay food-caching experiments: scrub jays can anticipate hunger & prefer more varied meals 79