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#1. Lurch is preparing for his favorite holiday, Halloween, and plans to go trick-or-treating in his friend’s neighborhood known for its generous candy distribution. He has learned through past experiences that only houses with their porch lights on will give out candy, whereas houses with lights off will not. As Lurch drives through the neighborhood, he systematically approaches houses with lights on and skips those with lights off, ensuring he maximizes his candy haul. Lurch’s ability to differentiate between houses based on the presence or absence of a porch light, and to subsequently emit the trick-or-treating response only at the lighted houses, exemplifies which fundamental behavioral process?
This question tests the understanding of a core concept in Applied Behavior Analysis the distinction between various stimulus and response relations Stimulus Discrimination is the behavioral process by which an organism learns to respond differently to different stimuli It involves responding in the presence of a discriminative stimulus S and not responding or responding differently in the presence of a stimulus delta S In Lurchs scenario The S is a house with its porch light ON which signals that the trickortreating response will be reinforced with candy The S is a house with its porch light OFF which signals that the trickortreating response will not be reinforced no candy Lurchs behavior demonstrates that he has learned to discriminate between these two stimuli emitting the same response trickortreating only in the presence of the S This fits the definition perfectly Lets analyze why the other options are incorrect A Response Generalization This occurs when a learner emits various responses that are functionally similar in the presence of a single stimulus or stimulus class For example if Lurch used different phrases or actions to ask for candy at the same lighted house In this scenario Lurch is performing the same response going to the house and trickortreating across different houses but his decision to approach is based on different stimuli not different responses B Response Differentiation This is the process of reinforcing some responses while not reinforcing or extinguishing others resulting in a change in the topography duration magnitude or other measurable dimension of the behavior It involves different responses under similar stimulus conditions For example if Lurch was taught to say Trick or Treat only in a specific tone of voice while other tones were ignored Lurch is engaging in the same response trickortreating but varying it based on the stimulus lights onoff not varying the form of his response itself D Stimulus Generalization This occurs when a response that has been reinforced in the presence of one stimulus also occurs in the presence of other similar but not identical stimuli For example if Lurch also trickortreated at houses that had only a small dim decorative light on mistakenly thinking it was a porch light Lurch is doing the opposite he is narrowing his responses to specific stimuli not broadening them to similar ones Therefore Lurchs behavior is a clear example of stimulus discrimination where he distinguishes between two different stimuli lights on vs lights off to guide his behavior
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