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Chapter 7

Psych 282 behaviour modification Chapter 7 stimuli.docx

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University of Alberta
Karsten Loepelmann

Chapter 7: Stimulus control: discrimination and generalization • The “ABCs” of behaviour in the presence of a particular antecedent cue or signal (a stimulus such as mom being present), a specific behaviour(asking for money) will be followed by a certain consequence (you get the money so you only ask when mom is around). At the same time, a specific EO has to be present like you have no money at all. • Stimulus control: Abehaviour is more likely to occur if a particular antecedent is present ( i.e. mom being present so you ask for money or red strawberry being present so you pick them up). Most of the time our behaviours are under this stimulus control. Why is this? This is because this is the only time that behaviour will be reinforced and thus likely to repeat in future. • Developing stimulus control: Stimulus discrimination training: • Stimulus discrimination training: administering a certain consequence for a  specific behavior when a particular stimulus is present, but not when another  stimulus is present. D •  In the presence of the discriminative stimulus (S ), that stimulus that is required  for the behavior to occurs, the behavior is reinforced and is most likely to occur  (or punished and is most likely to be weaken) • in the presence of any other antecedent stimulus (S or “ess delta”), the behaviour is not reinforced and the behaviour is not likely to occur in future. • Note: SD does not increase the or strengthen behavior, but rather increases the likelihood of it occurring. The reinforcement is what keep the behavior occurring again. • Holland & Skinner (1961): pigeon placed in operant conditioning chamber. when red disk was illuminated and the pigeon pecked it, food was delivered. Thus, Red lightpecked get food. But when green lightpecked no food. Thus the red light became and SD due to stimulus discrimination training. Thus increasing the likelihood that the pigeon will peck when red likght (SD) is present. But only the food after this reinforces the behaviour. • Developing read and spell
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