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Novapdfcom 11182009 schedules of reinforcement partial

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Unformatted text preview: ement Reinforcement given after a fixed number of responses responses (e.g. FR-3 1 dollar) If If ratio gradually increased over time many many responses responses obtained with few reinforcements. Organism Organism may pause briefly after each reinforcement reinforcement M. Bassil PSYC 202 Schedules Schedules of Reinforcement Reinforcement Partial reinforcements 2. Variable-Ratio (VR) Schedule reinforcement reinforcement given after a variable number of responses, responses, all centered around an average (VR-3) 3) high high & steady rate of responding, less pausing, & highly highly resistant to extinction e.g. GAMBLING (never know when next attempt will pay off) M. Bassil PSYC 202 16 Create PDF files without this message by purchasing novaPDF printer (http://www.novapdf.com) 11/18/2009 Schedules Schedules of Reinforcement Reinforcement Partial reinforcements 3. Fixed-Interval (FI) Schedule First First response that occurs after a fixed time interval is is reinforced (FI-3) Responding Responding slows after reinforcement & more frequent as next reinforcement time approaches e.g. Monthly exams & Cramming M. Bassil PSYC 202 Schedules Schedules of Reinforcement Reinforcement Partial reinforcements 4. Variable-Interval (VI) Schedule Reinforcement Reinforcement given for the 1st response after a variable time interval, centered around an average. Reinforcement’s less predictable steadier less steadier response response rate Pop Pop quizzes, random drug testing, roadside speed traps traps M. Bassil PSYC 202 17 Create PDF files without this message by purchasing novaPDF printer (http://www.novapdf.com) 11/18/2009 Reinforcement Reinforcement Schedules, Learning, & Extinction Extinction Continuous Continuous reinforcement produces rapid learning & association association BUT rapid extinction (soda machine). Partial Partial reinforcement produces slower learned behavior behavior BUT resistant to extinction (slot machine) Best Best is to reinforce behavior continuously until well established then shift to partial (variable) schedule; gradually gradually made more demanding M. Bassil PSYC 202 Escape & Avoidance Conditioning Escape conditioning: learn response to terminate learn terminate aversive stimulus (e.g. medication; clothes) Acquired thru negative reinforcement Acquired negative Avoidance conditioning: learn response to avoid learn av...
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