FRHD 3150 Lecture Notes - Lecture 7: Backward Chaining, Forward Chaining, Equivalence Class
1 Jun 2018
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LECTURE 7
Contextual stimuli
• Stimuli
o Anything that you can perceive as present in your environmental context
• Stimulus control
o The degree of correlation between the occurrence of a particular stimulus and of the
particular response
Types of Stimuli
• Discriminative Stimulus
o When the consequences only occur in the presence of the stimulus
• Stimulus Delta
o If this stimulus is present, then response will not be reinforced
o When the consequence never occurs in the presence of the stimulus
o Two parent families
▪ One parents is always the disciplinarian
Stimulus Discrimination Training
• Procedure of reinforcing a response in the presence of a discriminative stimulus
• Extinguishing that response in the presence of stimulus delta
Stimulus Generalization
• Procedure of reinforcing a response in the presence of a stimulus and the effect of the response
becoming more probable in the presence of another stimulus or situation
• When the behaviour remains the same across various stimuli
• How do we generalize
o Physical similarities
▪ Stimuli are highly similar in appearance
o Common-elements stimulus class
▪ Some similarities suggesting a common class
• Dogs
o Stimulus equivalence class
▪ Entirely dissimilar but same class
• Food
Fading
• Gradual change over successive trials of an antecedent stimulus that controls a response so that
the response eventually occurs to a partially changes or new stimulus
• Gradual transfer of control from one stimuli to another
find more resources at oneclass.com
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Document Summary
Contextual stimuli: stimuli, anything that you can perceive as present in your environmental context, stimulus control, the degree of correlation between the occurrence of a particular stimulus and of the particular response. Types of stimuli: discriminative stimulus, when the consequences only occur in the presence of the stimulus, stimulus delta. If this stimulus is present, then response will not be reinforced: when the consequence never occurs in the presence of the stimulus, two parent families, one parents is always the disciplinarian. Stimulus discrimination training: procedure of reinforcing a response in the presence of a discriminative stimulus, extinguishing that response in the presence of stimulus delta. Fading: gradual change over successive trials of an antecedent stimulus that controls a response so that the response eventually occurs to a partially changes or new stimulus, gradual transfer of control from one stimuli to another. Involves successive steps to work towards the desires stimuli/context, using prompts and reinforcement.
