lec15Mem09A - Lec 15 (3/19/09): Reinf. Wrap up & Intro...

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Lec 15 (3/19/09): Reinf. Wrap up & Intro to Memory What are biological bases for reinforcement (a comment) Implications of deterministic accounts of behavior for understanding of individual responsibility Introduction to memory 2/19/09 to and including 3/24/09
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10 8 6 4 2 0 Preference (Reward Value) 20 40 60 80 100 120 140 160 180 200 15 13 11 9 7 5 3 0 Chocolate Cake Snack During the Day vs. 24-Hour Calorie Limit 0 delay = You consume the reward (choc. cake) 0 delay = You "consume" reward (stick to your daily calorie limit) Delay Choc Cake Count-down (delay) to 24 hours Preference at 6 hrs to cake (11 hrs to meeting calorie limit) A = cake B = calorie limit Preference at 1 hr to cake, 6 hrs to meeting calorie limit A = cake B = calorie limit iClicker
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Summary Reinforcement principles predict behavior in and out of lab Drug companies and neuroscientists use reinforcement based lab methods Delay of reward functions help explain everyday human behavior But reinforcement contingencies are ambiguous Individual differ in their susceptibility to the effects of sooner, smaller rewards (impulsivity). It is likely that cognitive and personality differences explain differences in
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lec15Mem09A - Lec 15 (3/19/09): Reinf. Wrap up & Intro...

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