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Behavior modification involves analyzing behavior and developing procedures to modify or change behavior. To measure change, behavior must be observable and measurable. Observable behavior can be measured in terms of frequency, duration, or intensity; changes in these parameters are used to assess the efficacy of behavior modification procedures.

Behavioral excesses or deficits are usually the targets for behavior modification. A behavioral excess is typically objectionable, and the goal is to decrease the frequency, duration, or intensity of the behavior. An example of a behavioral excess may be self-injurious behavior (e.g., head banging). A behavioral deficit is more likely to be a favorable behavior for which behavior modification is used to increase the frequency, duration, or intensity of the behavior. Examples of behavioral deficits may be lack ...

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