It is Halloween night.The trick-or-treaters know that if the porch light is on at a house, they will get candy if they knock on the door and say "Trick-or-Treat." If the light is off, they know that there will be no reward waiting for them.The trick-or-treaters' behavior is determined by the date (Halloween night)and if a light is on or off.This illustrates the operant principle of

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The operant principle being illustrated in this scenario is stimulus control. The trick-or-treaters' behavior (knocking on the door and saying "Trick-or-Treat") is determined by the presence or absence of the stimulus of a porch light being on. They have learned through experience that the presence of the light is associated with receiving candy, and the absence of the light is associated with receiving no reward. This is an example of stimulus control, where behavior is influenced by the presence or absence of specific environmental stimuli.

It Is Halloween Night