Chapter 4 Classical Conditioning Applications Emotional Conditioning • • • • • Wide range of emotional responses Emotions universal Positive and negative Emotional response to stimulus reflexive Conditioned Emotional Responses (CERs) John Broadus Watson • Hard-line Behaviorism • British Empiricism (nurture over nature) • Early work with rats • Shifted to infant research Conditioning of Fear • Watson & Raynor (1920) • Albert B. – Mother a wet nurse at Harriet Lane Home (attached to Johns Hopkins University) – Albert first assessed at about 8 months – Emotionally stable, healthy Method • Present white rat – No fear • Present white rat and bang metal bar – Produces CER of fear, avoidance, withdrawl • • • • US = noise, UR = startle CS = rat CR = fear CER generalizes to other furry objects http://www.youtube.com/watch?v=FMnhyG ozLyE • Study went for several months • Intended to reverse CER conditioning, but Albert B’s mother ended her job at hospital • Mary Cover-Jones; counter-conditioning with Peter What Happened to Albert • Beck, Levinson & Irons (2009) • Historical detective work • Albert B.’s mother probably Arvilla Irons Merritte – Douglas Merritte, born 9 March 1919 • Arvilla Merritte left Johns Hopkins • Worked as assistant for ill wife of farmer • Douglas Merritte died 10 May 1925, probably from meningitis Name • Why Albert B.? – Ethical concerns with confidentiality not firmly established – Watson may have played “name games” – His sons William and James – His name from John Albert Broadus, Baptist minister… Albert B. What Happened to Watson • Affair with Rosalie Raynor, his grad student • Divorce, fired, resigned as president of APA • Worked for J. Walter Thompson advertising agency; vicepresident within two years • Ponds Cold Cream, Maxwell House coffee • Published books and articles on childcare – Psychological care of infant and child (1928) – Criticized by many modern child experts/advocates, but no more extreme than other childcare texts of the time – Strongly advocated against spanking and corporal punishment Nonhuman Studies of Fear • Usually shock as US • Rats freeze • Train operant response; train CS+ for aversive US, test suppression of operant response in presence and absence of CS • Suppression video Suppression Ratio Suppression Ratio = CS Responding CS Responding + pre-CS Responding • 0 if behaviour entirely suppressed • 0.5 if no suppression Pre-CS CS Calculation S.R. 25 25 25/(25+25)=25/50 0.5 25 0 0/(0+25)=0/25 0 25 15 15/(15+25)=15/40 0.375 Prejudice • • • • • Prejudice related to hate Hate conditionable Staats & Staats (1958) Subjects rate nationalities Paired positive, negative, neutral words with nationalities Association • Political speeches • Media coverage • Negative images, words, impressions paired with identifiable group Counter Conditioning • • • • • Mary Cover Jones (1924) Eliminate phobia via classical conditioning Peter feared rabbits Peter eats snack (US) … present rabbit (CS) Associate positive US with CS Systematic Desensitization • Relaxation techniques • Gradual introduction of phobic stimulus • Imagination up to real situation Flooding • “Flood” patient with exposure to fearinducing stimulus Advertising First-Order C.C. in Ads • Product (initially neutral --> CS) • Pair with stimulus that elicits positive emotion (US) • Consumer sees product, has positive CR Example • • • • • Postbank US = funny situation UR = happiness CS = brand CR = happiness, amusement, positive emotion Second-Order C.C. • Use previously conditioned celebrity, situation, etc. • CS1 & US • Now, pair brand (CS2) with CS1 Example • • • • • • • Chanel No. 5 Nicole Kiddman = CS1 Positive feeling = CR Attractive, successful, lifestyle = US Positive feeling = UR Chanel No. 5 = CS2 Assumption: buy perfume, be rich, popular, get the cute guy, romance Example • Japander.com • Brad Pitt and 503 Jeans – Pitt (CS1), leading man, celebrity, rich, pretty = desirable (US), 503s (CS2) • Pierce Brosnan and VISA – Bond persona (CS1), excitement, adventure, sophistication = desirable (US), VISA (CS2) Paraphilia Paraphilia • • • • • “Incorrect love” Fetishism, masochism, pedophilia, rape, etc. More common in males Freud: unconscious forces Classical conditioning: association formed Example: Masochism • Generally, CS is previously neutral • But, a US, by pairing with another strong US, can become a CS • Pavlov: shock (CS) for food (US) • Masochism: painful stimulus (CS) for stimulus eliciting sexual pleasure (US) Counter Conditioning • Pair undesired CS with strongly aversive US (resulting in, e.g., nausea) • Aversion therapy • Treatment difficult with some forms of paraphilia (e.g., pedophilia) Taste Aversion Typically • • • • • • Long-delay or trace conditioning US is food poisoning, illness, etc. UR is nausea induced pain CS is novel food/flavour CR is avoidance, nausea Violation of contiguity? Explanations? • Sensitization • Aftertaste • Biological preparedness – Taste aversion a special case Biological Preparedness in Taste-Aversion • Garcia & Koelling (1966) Foot shock Water intake Water intake X-ray Pre-cond. Post-cond. Flavoured water Pre-cond. Post-cond. “Bright-noisy” water Explanation • Biological predispositions • Must know about CS-US relationship before predicting nature of CR • Certain stimuli more easily associated than others Immune Function Allergic Reaction • • • • Release of histamines Body’s immune response to allergens Not all allergic responses biological Can be learned Examples • Pollen and artificial flowers • My allergy to cats Russell et al. (1984) • • • • Expose guinea pigs to BSA Becomes allergen (US for histamine release) Pair BSA with odour of fish or sulphur (CSs) Expose guinea pigs to odours and get increased histamines (CR) in bloodstream • Preparatory value of classical conditioning Schaller et al. (2010) • Subjects see photo sets of guns (G) or people with infectious diseases (ID) • Stress test given : G more stressful than ID • Blood drawn, incubated with bacteria • ID subjects’ white blood cells produced 24% increase in cytokine interleukin-6 (IL-6) over baseline • G subjects only show 7% increase in IL-6 over baseline • Photos = CS, IL-6 production = CR