Class Notes (839,239)
FRHD 3150 (105)
Lecture

# January 22, 2013.docx

3 Pages
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Department
Family Relations and Human Development
Course Code
FRHD 3150
Professor
Michelle Preyde

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Page 1 of 3 January 22, 2013 FRHD 3150-01  Schedules of reinforcement (increasing behaviour) o The plan or rule outlining which occurrences of behaviour will be reinforced o Continuous reinforcement  Reinforcement may not be available every single time o Intermittent reinforcement  3 types of schedules  Ratio  Behaviour is reinforced based on the # of times that it occurs  Fixed ratio (FR)  Every set # of incidents of the operant receives reinforcement (ie. FR6, FR2), often used in sequence of increasing ratios  Post-reinforcement pause: after reward the receiver will take a bit of a break before working for next reward  Optimal ratio: the reward causes consistent effects  Ratio strain: when the ratio of event to reward is too large, lower# of events slightly to get reward  Variable ratio (VR)  Operants receive reinforcement sporadically around an average number of behaviours (VR10)  No post-reinforcement pause because don't know if/ when reward so keep working  Less risk of ratio strain because don't know when next reward comes, just keeps going  Capacity for higher optimal ratio (VR5 to VR10)  Progressive ratio  Progressive-like fixed ratio, ratio requirement increased by a specified amount after each reinforcer  Interval  The first instance of the behaviour is rewarded after a period of time (interval) where no rewards are given  Fixed interval (FI)  1st occurrence of behaviour, after a fixed period of time, will be rewarded (FI 2 minutes)  Doesn't matter how long after interval ends as long as behaviour occurs  Post reinforcement pause  Behaviour increases as interval end approaches (for those without the ability to tell time)  Variable interval (VI)  Length of interval changes unpredictably around on average (VI 10 minutes)  Produces moderate, steady rate of behaviour  Little to no post-reinforcement pause  Limited hold (LH) Page 2 of 3  Period of time in which the behaviour must occur  Used with interval schedules- either variable or fixed interval schedule )hold occurs after interval)  FR 2 minutes/ LH 10 seconds  Ie. Set timer to random time, when it goes off, if not fighting, then get 10 minutes of tv time (don't know when it'll go off) or have to stay quiet for full 10 seconds after to get it as well
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