Infancy Developmental Psychology Sheena Ramos Internal Infancy • Birth to 2 years of age • Rapid growth and development Internal Biopsychosocial Framework Physical Growth and Development Cognitive Development Internal Socioemotional Development Patterns of Growth Cephalocaudal pattern- growth proceeds from top to bottom Proximodistal pattern-growth starts at the center of the body and moves toward the extremities Internal Height and Weight • 1 inch per month in the first year • Nearly triple their weight by first birthday. • The rate of growth slows in the second year. • Growth spurts are episodic. • Philippines: National Nutrition Council • At birth, or 40 weeks: 3.2kg, with a range of 2.5 to 4.5kg Internal • Dendritic spreading- increasing the connections between neurons Brain Development • Synaptogenesis- the creation of synapses • Myelination- the growth of fatty insulating coating along the axon of the neuron • Synaptic pruning- overproduction of neurons, followed by gradual decrease Internal Brain Development • Lateralization-specialization of function in one hemisphere or the other. • Hemispheres of cerebral cortex start to specialize • Peak of synaptic overproduction in visual cortex in 4th month • Prefrontal cortex (higher level thinking, self regulation)- peak of synaptic overproduction at 1 yr of age • Plasticity- brain’s ability to change in response to experience Internal Brain Development • EEG- baby’s electrical activity • fNIRS- Functional Near Infrared Spectroscopy- changes in blood oxygen for brain’s activity • MEG- Magnetoencephalography- maps brain activity through magnetic fields for perceptual and cognitive activities such as vision, hearing, language in infants. Internal Sleep • Typical newborn sleeps 18 jrs a day, but it varies from 10 to 21 hrs/day • Sleep problems: common is night-time waking. • Factors that could contribute to shorter infant sleep: • maternal depression during pregnancy, early introduction of solid food, infant TV viewing, child care attendance. • Newborns spend a lot of time in REM sleep; might promote brain development • Sleep has positive link to cognitive functioning (memory, language, executive function). • SIDS- Sudden Infant Death Syndrome, a condition that occurs when infants stop breathing, usually during the night, and die suddenly without apparent reason. Internal Nutrition • Each infant has unique needs • Recommended by nutritionists: 50 calories per day for each pound they weigh i. First year developments: 1. Motor Skills: a. Begins with suck and swallow movements b. Progress to chew and swallow movements 2. Fine Motor Skills: a. Being fed by caregiver to selffeeding i. Caregivers play very important role in early development of eating patterns Internal Breastfeeding • Breastfeeding is shown to be better for infant than bottle feeding. • Recommendation is to exclusively breast feed for first six months followed by continued breast feeding as complementary foods are introduced, and further breast feeding for one year or longer as desired by both infant and mother. Internal Breastfeeding Benefits to child Fewer gastrointestinal infections Fewer lower respiratory tract infections Reduce risk of allergies Protects wheezing/asthma for three months of age Less ear, throat, sinus infections Less likelihood of becoming overweight/obese Less likely to develop Type 1 diabetes Lower rates of SIDS Less hospitalizations Benefits to mother Lower incidence of breast cancer Reduction in incidence of ovarian cancer Reduction in Type 2 diabetes Internal Dynamic Systems View • Sequence of developmental milestones is not as fixed, and not due as much to heredity. • Dynamic Systems Theory- Perception and action are coupled • Infants assemble motor skills for perceiving and acting. • To develop motor skills, infant must perceive something in their environment that motivates them to act and use their perceptions to fine-tune their movements. • Motor skills assist infants in reaching their goals. • Process: • Motivation -> Creation of motor behavior • Coordinate skills, adapting and modifying movement patterns • Ballparks/estimates • Fine-tuning • Modulation Internal Reflexes • Reflexes- The beginning of motor development. • Reflexes are built-in reactions to stimuli. Previously thought of as automatic and beyond newborn’s control. 1. Rooting reflex- turning of head towards direction of cheek being stroked 2. Sucking reflex- automatically suck an object placed in their mouth. 3. Moro reflex- when startled, newborn arches its back, throws back its head, and flings out its arms and legs. Then newborn rapidly draws in its arms and legs. Internal Gross Motor Skills • Involves large-muscle activities such as moving one’s arms and walking • Posture- dynamic process that links sensory information, spatial recognition, balance and equilibrium, vision and hearing. • Timing of milestones may vary by as much as two to four months. • Some infants do not follow the standard sequence of motor accomplishments Internal • Locomotion- walking Gross Motor Skills • Locomotion and postural control are closely linked, especially in walking upright • Alternating leg movements and forward stepping movements- precursors to walking • Stepping forward movements, but may take time to walk • Stabilizing body as legs swing forward and backward • Integrate perceptual information with this new motor development (perceptualmotor coupling) • Walking is linked to advancement of other aspects of development- ex: Internal language Fine Motor Skills • Motor skills that involve more finely tuned movements, such as finger dexterity • Onset of reaching and grasping marks a significant achievement in infants ability to interact with their surroundings. • Types of grasps 1. (Initial) Palmar grasp- gripping with whole hand- large objects 2. Subsequently) Pincer grip- grasp small objects with thumb and forefinger • Perceptual-motor coupling is necessary to coordinate grasping Internal Sensory and Perceptual Development • Sensation- the product of interaction between information and the sensory receptors—the eyes, ears, tongue, nostrils and skin • Perception- the interpretation of what is sensed. • Ecological View- (Gibsons) Perception brings people in contact with the environment to interact with and adapt to it • Affordances- opportunities for interaction offered by objects that fit within our capabilities to perform activities. • Perceptual-motor Coupling- Action educates perception. Internal The four photographs represent a computer estimation of what a picture of a face looks like to a 1-month-old, 2-month-old, 3-month-old, and 1-year-old (which approximates the visual acuity of an adult). Visual Perception • Visual Acuity • Preferential Looking Method- a procedure for testing infant perceptual and cognitive skills by observing infant viewing preferences to two or more items. • Color Vision- 4 weeks to 8 weeks- can already see some color. 4 months- can have color preferences. May prefer saturated colors • Perceptual Narrowing- more likely to distinguish previously seen faces Internal Visual Perception • Visual Preference Method- method used to determine whether infants can distinguish one stimulus from another by measuring the length of time they attend to different stimuli. • Presenting a stimulus a number of times to measure perception: • Habituation- Decreased responsiveness to a stimulus after repeated presentations of the stimulus. This means the infant is no longer interested in looking. • Dishabituation- recovery of a habituated response after a change in stimulation. This can mean the infant can discriminate between old and new stimulus. • Looking time is one of the most important measures of infant perceptual and cognitive development. Internal Perceptual Constancy • Perceptual Constancy- sensory stimulation is changing but perception of the physical world remains constant. • Size constancy- recognition that an object remains the same even though the retinal image of the object changes as you move toward or away from the object • Shape constancy- recognition that an object remains the same shape even though its orientation to us changes. • Perception of Occluded Objects • Depth of Perception Internal Hearing, Touch and Pain, Smell • Newborns can hear, but their sensory threshold is higher than that of adults • Loudness- immediately after birth, infants cannot hear soft sounds; continuously improve until 5-10 yrs • Pitch- perception of the frequency of a sound • Infants are less sensitive to pitch of a sound than adult • Localization- can determine the general location from which a sound is coming • Babies show preferential orientation to speech and music Internal Hearing, Touch and Pain, Smell • Touch -tactile contact is essential for infant wellbeing • skin-to-skin (kangaroo) contact improves development for pre-term or low-birthweight babies and gentle touch reduces stress and stimulates the prefrontal cortex in infants • Touch is an important medium for infant perception and learning. • They have heightened pain sensitivities. Internal Smell and Taste • Taste- perceive the four basic tastes of sweet, sour, salty and bitter as shown by their facial expressions, sucking rate and swallowing • Prefer sweet tastes and dislike bitter, sour and strong salty tastes • Prefer umami • Smell- can already differentiate odors • Smelling helps them to identify the familiar or safe things and people in their world. • There is also an innate bias to breast milk Internal Intermodal Perception • The ability to relate and integrate information from two or more sensory modalities, such as vision and hearing. • When they hear a sound they look in the direction it came from, indicating coordination of auditory and visual responses. Internal Biopsychosocial Framework Physical Growth and Development Cognitive Development Internal Socioemotional Development Piaget’s Theory of Infant Development • A general, unifying story of how biology and experience sculpt cognitive development. Just as our physical bodies have structures that enable us to adapt to the world, we build mental structures that help us adjust to the new environmental demands. • Cognitive Processes • Maturation- concept that an innate, biologically based program is the driving force behind development • Schemes- actions or mental representations that organize knowledge a. Assimilation when children use their existing schemes to deal with new information and experiences b. Accommodation- when children adjust their schemes to take new information into account c. Organization- grouping of isolated behaviors and thoughts into a higher-order system. d. Equilibration is the mechanism by which children shift from one stage of thought to the next. Internal • The idea of cognitive stages means that each person’s cognitive abilities are organized into coherent mental structures Piaget’s Theory of Infant Development • cognitive-developmental approach- focused on how cognition changes with age • The Sensorimotor Stage- lasts from birth to 2 years of age. Infants construct an understanding of the world by coordinating sensory experiences with physical, motoric actions. i. Beginning of stage- newborns have little more than reflexes ii. End of stage- 2 year olds can produce complex sensorimotor patterns and use primitive symbols. • Object Permanence- the understanding that objects continue to exist even when they cannot be seen, heard, or touched. Internal • Infant’s cognitive development is not linear • Perceptual Development and Expectations- - Gibson and Spelke argue that infant’s perceptual abilities are highly developed at an early stage, earlier than Piaget’s estimations Evaluating Piaget’s Sensorimotor Stage • Core Knowledge Approach- infants are born with domainspecific innate knowledge systems, like space, number sense, object permanence, language. • Most developmentalists today agree that Piaget underestimated the early cognitive accomplishments of infants that both nature ad nurture are involved in infant’s cognitive development. • Developmental Cognitive Neuroscience- recently emerging field that explores connections between brain, cognition, and development Internal Conditioning and Attention • Conditioning: • Skinner’s theory of operant conditioning- consequences of a behavior produces change in the probability of the behavior’s occurrence. • Rovee Collier Mobile experiment- correlates conditioning to infant memory Internal Conditioning and Attention • Attention- the focusing of mental resources on select information, improves cognitive processing on many tasks. • It is likely that Parietal lobes are active when infants orient their attention • orienting/investigative process -- involves directing attention to potentially important locations in the environment (where) and recognizing objects and features such as color and form (what). • sustained attention that allows infants to learn about and remember characteristics of a stimulus as it becomes familiar i. Habituation and Dishabituation 1. Habituation- decreased responsiveness to a stimulus after repeated presentations of the stimulus 2. Dishabituation- increase in responsiveness after a change in stimulation Internal Attention • Joint attention- two or more individuals focus on the same object or event • An ability to track caregiver’s behavior, such as following the gaze of another person • Reciprocal interaction Internal Memory • Memory- retention of information over time • Encoding- process in which information is transferred to memory • Implicit memory- memory without conscious recollection- memories of skills and routine procedures that are performed automatically • Explicit memory- conscious remembering of facts and experiences • Babies do not show explicit memory until second half of the first year • Changes in the brain linked to infants’ memory development • 6-12 months- maturation of the hippocampus and cerebral cortex especially the frontal lobes, which makes explicit memory possible • Explicit memory continues to improve during 2nd year as brain structures further mature and connections between them increase • Infantile or childhood amnesia- not remembering memories from first three years of life Internal Imitation, Concept Formation, Categorization • Imitation- infants don’t blindly imitate everything that they see • Also involved in processing of social events and contributes to rapid social learning • Deferred imitation- infants can imitate actions they’ve seen a few hours or days earlier • Concept Formation and Categorization • Concepts- cognitive groupings of similar objects, events, people or ideas • Perceptual categorization- categorizations that are based on similar perceptual features or objects such as size, color, and movement • Categorization is an important aspect of learning and in understanding the world. Internal • Intelligence—an ability to take in information and use it to adapt to the environment Intelligence • Bayley Scales of Infant Development, measure primarily sensory and motor skills • Bayley’s test and others like it have proven to be helpful in identifying infants and toddlers with serious developmental delays Internal • Language is a form of communication, whether spoken, written or signed—that is based on a system of symbols Language Development Language’s Rule Systems i. Phonology -sound ii. Morphology- word formation iii.Syntax- combination of phrases and sentences iv.Semantics- meaning of words and sentences v. Pragmatics- use of language in different contexts Internal Language Development 1. Recognizing Language Sounds- before begin to learn words, infants can make fine distinctions among sounds of language 2. Babbling and other vocalizations 1. Vocalizations are a practice of making sounds to communicate and to attract attention 1. Crying- can signal distress and other things 2. Cooing- gurgling sounds made in the back of the throat, expressing pleasure. 3. Babbling- strings of consonant-vowel combinations. 2. Gestures 1. Early gestures can be symbolic for wants and needs 2. Pointing- important index of the social aspects of language 1. Pointing without checking adult gaze then 2. Pointing while looking back and forth between an object and the adult Internal Language Development First Words • Infants understand their first words earlier than they speak them • Receptive vocabulary (words the child understands) considerably exceeds spoken (or expressive) vocabulary (words the child uses). • First words are names of important people, familiar animals, vehicles, toys, food, body parts, clothes, household items, greeting terms. • Timing of first words vary from child to child. • Infant’s spoken vocabulary rapidly increases after the first word is spoken • Overextension- tendency to apply a word to objects that are inappropriate for the word’s meaning by going beyond the set of referents an adult would use • Underextension- tendency to apply the word too narrowly. • Two-word utterances- conveying of meaning using two words • Telegraphic speech- use of short and precise words without grammatical markers such as articles, auxiliary verbs, and other connectives Internal Language Development • Biological influences • Regions of the brain involved in language • Broca’s area- area in left frontal lobe, for producing words • Wernicke’s area- area in left hemisphere, for language comprehension • Damage to either produces aphasia- loss or impairment of language processing. • Damage to Broca’s- difficulty in producing words • Damage to Wernicke’s- poor comprehension but produce fluent yet incomprehensible speech • Language Acquisition Device- biological endowment that enables the child to detect certain features and rules of language Internal Language Development • Environmental influences • Role of Social Interaction- language is not learned in a social vacuum • Interaction View of language- Michael tomasello- children learn language in specific contexts • Child-directed speech or parenteseParents shift to it when talking to a baby unconsciously. • Recasting • Expanding • Labeling Internal Language Development How parents can facilitate infant’s and toddler’s language development: Linguist Naomi Baron, psychologists Roberta Golinkoff and Kathy HirshPasek’s suggestions: • Be an active conversational partner • Narrate your daily activities to the baby as you do them • Talk in a slowed-down pace and don’t worry about how you sound to other adults when you talk to your baby • Use parent-look and parent-gesture and name what you are looking at • When you talk with infants and toddlers, be simple, concrete and repetitive • Play games • Remember to listen • Expand and elaborate language abilities and horizons with infants and toddlers. • Ask questions that encourage answers other than yes or no, actively repeat, expand and recast the utterances. • Adjust to your child’s idiosyncrasies instead of working against them. Make them feel that they are understood. • Resist making normative comparisons. Internal Biopsychosocial Framework Physical Growth and Development Cognitive Development Internal Socioemotional Development Emotional Development • Emotion- a feeling or affect that occurs when a person is in a state, or an interaction that is important to him or her. • Important roles of emotion in infants • Communication with others• Behavioral organization- emotions influence infant’s social responses and adaptive behavior as they interact with others in the world • Biological, Cognitive and Environmental Influences • Biology- Brain- brain stem, hippocampus, amygdala play a role in distress, excitement, and rage • Cognitive processes • Attention toward or away from an experience can influence infant’s and children’s emotional responses • Culture • Relationships and being in the care of others provides diversity in emotional experiences • Cultural differences impact development of emotions Internal Emotional Development • Early Emotions • Primary emotions • Self-conscious emotions- require self-awareness that involves consciousness and a sense of “me”. • Structural immaturity of the infant brain makes it unlikely that emotions which require thought can be expressed before the first birthday • Emotional Perception • At first, infants are better at perceiving emotions by hearing than by seeing • 2-3 mos old- discriminate differences in others’ emotions • Emotional Contagion-crying in response to hearing another infant cry, evident beginning at just a few days old • Still-face paradigm- infants quickly learn to expect certain emotional reactions from others, especially others who are familiar and important to them • Gain abilities to match auditory and visual emotion. • Social Referencing- process of becoming more adept at observing others’ emotional responses to ambiguous and uncertain situations, and using that information to shape one’s own emotional responses Internal Emotional Development • Impact of Social Relationships • Infants modify their emotional expressions in response to their parent’s emotional expressions and vice versa with parents. • Cries and smiles are two emotional expressions that infants display when interacting with caregivers. • Crying- the most important mechanism newborns have for communicating with their world • First cry- verifies that lungs have filled with air • Basic cry – example: hunger • Anger cry • Pain cry • Smiling- a key social signal • Reflexive smile • Social smile Internal Emotional Development • Fear • Stranger anxiety- the most frequent expression of fear in infants. Showing of fear and wariness of strangers. • Less stranger anxiety when they are in familiar settings. When infants feel secure, they are less likely to show stranger anxiety. • Less fearful of child strangers than adult strangers • Less fearful of friendly, outgoing, smiling strangers than of passive, unsmiling strangers • Separation protest- fear of being separated from their caregivers Internal Emotional Regulation and Coping • Infant gradually develops an ability to inhibit, or minimize, the intensity and duration of emotional reactions. • Early in infancy- babies put their thumbs in their mouths to soothe themselves. Also mainly depend on caregivers to help them soothe their emotions. • Later in infancy- sometimes redirect their attention or distract themselves in order to reduce emotional arousal. • 2 yrs of age- toddlers can use language to define their feeling states and the context that is upsetting them. • To soothe or not to soothe? • Soothing helps infants develop a sense of trust and secure attachment to the caregiver. Internal Temperament • Temperament- involves individual differences in behavioral styles, emotions and characteristic ways of responding • Predispositions toward emotional reactivity • Emotional Reactivity- involves variations in the speed and intensity with which an individual responds to situations with positive or negative emotions • Self-regulation- involves variations in the extent or effectiveness of an individual’s ability to control his or her emotions. • Clusters of temperament • Easy child • Difficult child • Slow-to-warm-up child • Kagan’s Behavioral Inhibition • Shy, subdued, timid child • Social, extraverted, bold child Internal Temperament • Biological influences • Heredity • Eventually evolves through experiences, development of selfperception and behavioral preferences • Gender • Parents might react differently to an infant’s temperament depending on whether the baby is a boy or a girl • Culture • The cultural differences in temperament were linked to parental attitudes and behaviors. Internal Temperament • Environment • Goodness of fit refers to the match between a child’s temperament and the environmental demands the child must cope with • Lack of fit can produce adjustment problems • Parenting and The Child’s Temperament • Temperament experts Ann Sanson and Mary Rothbart (1995): • Attention to and respect for individuality- Good parenting involves sensitivity to the child’s individual characteristics • Structuring the child’s environment-Crowded, noisy environments can pose greater problems for some children • The “difficult child” and packaged parenting programs- whether a particular characteristic is difficult depends on its fit with the environment. Internal Personality Development Theories • Personality- the enduring personal characteristics of individuals • Emotions and temperament form key aspects of personality. • Psychosexual Stages of Development • Sigmund Freud • oral stage, from birth to age 2, infants derive satisfaction through the mouth • Trust • Erik Erikson- first year of life is characterized by the trust-vs-mistrust stage of development. • Infants learn trust when they are cared for in a consistent, warm manner. Otherwise, mistrust develops. • Object relations Theory • interaction between mother and infant lays the foundation for future personality development because that early interpersonal experience serves as a prototype for subsequent interpersonal relations Internal Developing a sense of self • Studying the development of sense of self in infancy is difficult because infants cannot verbally express their thoughts and impressions • Subjective self- an infant’s awareness that she or he is a separate person who endures through time and space and can act on the environment • Objective (categorical) self a toddler’s understanding that she or he is defined by various categories such as gender or qualities such as shyness • Development of the emotional self begins when babies learn to identify changes in emotion expressed in others’ faces, at 2 to 3 months of age. Internal Independence • Second stage of development in Erik Erikson’s theory: as autonomy versus shame and doubt. • Autonomy builds as infants mental and motor abilities develop. • They feel pride in these new accomplishments and want to do everything themselves. • Shame and doubt- develops when caregivers are impatient about things that toddlers are able to do by themselves, or overly criticizes accidents and Internal Social Orientation and Understanding • Infants respond to faces, sounds of human voices, become adept at interpreting meaning of facial expressions and voices • As infants develop the ability to crawl, walk and run, they begin to independently initiate social interchanges on a more frequent basis • Joint attention and gaze following help infant understand that other people have intentions. • Social Referencing- reading the emotional cues in others to help determine how to act in a particular situation. Internal Attachment • Attachment- a close emotional bond between two people • Freud- emphasized that infants become attached to the person or object that provides oral satisfaction. • Harry Harlow-Feeding is not a crucial element in the attachment process, but contact comfort is important • Erik Erikson- physical comfort and sensitive care are key to establishing basic sense of trust in infants • John Bowlby’s Attachment Theory- both infants and their primary caregivers are biologically predisposed to form attachments. • Maternal deprivation hypothesis: the notion that later serious deleterious outcomes will result from the lack of a consistent attachment figure in early childhood. Internal Attachment • Attachment security: the readiness of an infant to use the primary caregiver to derive a sense of security that can be reflected in her pattern of attachment behaviours. • The Strange Situation- by Mary Ainsworth-an observational measure of infant attachment that requires the infant to move through a series of introductions, separations and reunions with the caregiver and an adult stranger in a prescribed order Internal Critiques on Attachment Theory • Secure attachment concept does not adequately consider certain biological factors in development such as genes and temperament • Secure attachment theory could be ignoring the diversity of socializing agents and contexts Internal Attachment • Caregiver characteristics such as marital status, age, education level, and income, and psychiatric disposition can affect infants’ attachment quality. • Securely attached babies have caregivers who are sensitive to signals and constantly available to respond to the babies’ needs. • Caregivers of avoidant babies tend to be unavailable or rejecting. • Caregivers of disorganized babies often neglect or physically abuse them. Internal Attachment • Developmental social neuroscience examines connection between socioemotional processes, development and the brain • Connections between attachment and the brain involve the neuroanatomy of the brain, neurotransmitters, and hormones • Prefrontal cortex and subcortical regions of the and the hypothalamus • Hormones and neurotransmitters • in mother’s neucleus accumbens could be important in motivating the mother’s approach to the baby • Can also be secreted in males • When fathers engaged with babies at 6 months, their oxytocin levels increased • Dopamine circuits are activated when mothers care for infants and exposed to infants cure such as eye contact, smiling, etc Internal Social Contexts • The Family • Marital conflict might reduce the efficiency in parenting • Transition to parenthood • Couples enjoyed more positive marital relations before the baby was born than after, but some report increase in marital satisfaction Internal Social Contexts • Reciprocal socialization- bidirectional socialization, where children socialize parents just as parents socialize children • Mutual gaze and eye contact • Scaffolding- turn taking activities (peekaboo, pat-acake)- develop joint attention • Managing and Guiding Infant’s Behavior- to attempt to reduce or eliminate undesirable behaviors • Being proactive and childproofing the environment to avoid dangerous objects and situations Internal • The Philippine Republic Act 8980: Early Childhood Care and Development Act • Early Childhood Care and Development (ECCD) System refers to the full range of health, nutrition, early education and social services programs that provide for the basic holistic needs of young children from birth to age six, to promote their optimum growth and development. Child Care • In 2013, the Early Years Act called for the establishment of an ECCD system that covers comprehensive health, nutrition, early education, and social services for children between the ages of 0-8, with children ages 0-4 falling under the auspices of the ECCD Council, and children ages 5-8 under the Department of Education • Republic Act No. 6972, the “Barangay (village) Level Total Protection of Children Act”, has a provision that requires all local government units to establish a day-care center in every village; the law institutionalized the features of the day-care program that provide for young children’s learning needs aside from their health and psychosocial needs. Internal Biopsychosocial Framework Physical Growth and Development Cognitive Development Internal Socioemotional Development Arnett, J. J. (2016). Human development: A cultural approach. Pearson. Boyd, D. R., & Bee, H. L. (2015). Lifespan development. Pearson. References education_south. (2021, August 2). 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