Lect+14+march23_ch8 - Stimulus Control of Behavior Chapter...

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Stimulus Control of Behavior Chapter 8 Tuesday March 23
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Midterm 2 55 multiple choice questions Thursday March 25th
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Identification and Measurement of Stimulus Control Stimulus Discrimination- ? Stimulus Generalization- ?
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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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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. The weaker or less salient stimulus will acquire a weaker response, even though the stimulus would be an adequate CS on it's own. Interference with the conditioning of a stimulus because of the simultaneous presence of another stimulus that is easier to conditioned. Illustrates competition among stimuli for access to the process of learning.
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Type of Reinforcement Development of stimulus control also depends on the type of reinforcement that is used Reinforcement types • Positive - instrumental conditioning procedure in which there is a positive contingency between the instrumental response and a reinforcing stimulus ± Study hard - receives a good grade • Negative - instrumental conditioning procedure in which there is a negative contingency between the instrumental response and an aversive stimulus ± Person takes a Tylenol - headache goes away
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Type of Reinforcement Compound Stimulus Simultaneous presentation of two or more CS Control of behavior by combinations of two or more separate (or so-called “elemental”) stimuli. Compound stimulus control is common. Little research in compound stimulus control has been conducted in operant conditioning. Most relevant research has been conducted in Pavlovian conditioning.
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Type of Reinforcement (8.5) Experiments Foree & LoLordo (1973)
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Type of Instrumental Response Nature of response required for reinforcement can determine which of several key features of a compound stimulus gains control over behavior.
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Type of Instrumental Response (8.6)
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Stimulus Elements Versus Configural Cues in Compound Stimuli Stimulus-element approach Assumes organisms treat stimulus elements in a compound stimuli as distinct and separate parts of the
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Lect+14+march23_ch8 - Stimulus Control of Behavior Chapter...

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