The individual modifies the occurrence and form of his own behavior due to the association of that behavior with a stimulus.

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While the research showed a strong association between knowledge and behavior, it didn't prove that a lack of knowledge causes credit-card misuse or vice versa, Prof.

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Criminality, like any other behavior, is learned from others in social settings and thus behavior varies with differences in association.

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Michael Weiner, executive director of the MLB Players Association, said he doesn't believe any collusive behavior is taking place.

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American Psychiatric Association President Dr. Rodrigo Munoz said there is no specific link between these drugs and violent behavior.

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