Lect+15+April1_ch8 - Stimulus Control of Behavior Chapter...

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Stimulus Control of Behavior Chapter 8 (2/2) Thursday April 1, 2010
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Overviews Summary Finish Chapter 8 Start Chapter 9: Extinction of Conditioned Behavior
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Midterm 2 summary Midterm 2 Exam Grades 0 5 10 15 20 25 30 35 40 raw score (x/55) Number of student s 0 20 40 60 80 100 120 140 160 180 5 1 0 1 52 02 53 03 54 04 55 05 56 06 5 Cumulative y 165.000 Count 7.926 Std Dev. 0.617 Std Error 35 (~63%) Mean https://secure.fas.rutgers.edu/apps/gradebook/ Exam 3/25/2010 55multiple choice questions Raw Scores
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Midterm 1 0 10 20 30 40 50 60 mi dterm 1 raw scores Frequency 0 50 100 150 200 0 5 10 15 20 25 30 35 40 45 50 55 Cumulative Frequenc y 168.0 Count 6.3 Std Dev. 0.5 Std Error 33.0 Mode 33.5 Median ~67 33.3 Mean % number mid term 1 raw scores Input Range = cl_e1!$G$1:$G$169 Descriptive Statistics for:
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Midterm 3, Final Grades Midterm 3 Tuesday, April 13 (Ch 8,9,10) Final Thursday, May 6 (8-11 pm; cumulative; ~100-150 questions ) How will the course grade be determined? E1+E2+E3/ total number of possible points Will assigned letter grade. You: (34+35+50)/(50+55+55) 119/160 = 74% Class: (34+35+35)/(50+55+55) 104/160 = 65%
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Summary Stimulus and Response Factors in Stimulus Control Sensory Capacity and Orientation Relative Ease of Conditioning Various Stimuli Type of Reinforcement Type of Instrumental Response Stimulus Elements Versus Configural Cues in Compound Stimuli
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Discrimination We examine how organisms come to respond differently in the presence of different stimuli Generalization We examine how organisms come to respond similarly in the presence of different stimuli Stimulus Control of Instrumental Behavior Food reward Development Of Discrimination Time Resp. Simple task:
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Reinforcement is delivered only if the rat jumps at the “odd”card
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Generalization Gradients We can study a the extent of an organism’s generalization by presenting it with a stimuli that differ in varying degrees from the training stimuli S+ Stimulus the signals the availability of reinforcement Excitatory generalization gradient • Stimuli that differ from S+ should be progressively less effective in evoking the instrumental response
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Generalization Gradients S- Stimulus that signals the lack of reinforcement Inhibitory generalization gradient • Stimuli that differ from S- should be progressively less effective in inhibiting the instrumental response
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Reminder of wavelengths
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Responses Wavelength of light Brightness of light S+ S+ AB ->The gradient in A is peaked; indicates control of responding by wavelength of light. Hypothetical Generalization Gradients ->The gradient in B is flat; indicates lack of control of over responding by brightness or intensity of light.
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550 555 590
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Stimulus and Response Factors in Stimulus Control Sensory Capacity and Orientation Relative Ease of Conditioning Various Stimuli Type of Reinforcement Type of Instrumental Response Stimulus Elements Versus Configural Cues in Compound Stimuli
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Sensory Capacity and Orientation Physical limitations of sensory systems Ultrasounds Infrared light Orientation Bottom of mobiles
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Relative Ease of Conditioning Various Stimuli Overshadowing First described by Pavolov, occurs when more than one CS is presented during learning.
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This note was uploaded on 11/17/2011 for the course PSYCHOLOGY 830:311 taught by Professor Rovee-collier during the Spring '09 term at Rutgers.

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Lect+15+April1_ch8 - Stimulus Control of Behavior Chapter...

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