Factor Structure of the Motivation Assessment Scale for Persons with Mental Retardation

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Abstract
The rating scale used to assess the motivators of maladaptive behaviors in persons with mental retardation was the Motivation Assessment Scale. In the current study, we validated the factor structure of the scale on a sample of 118 subjects with predominately severe or profound mental retardation. They exhibited deviant behaviors such as self-injurious and tantrum behavior, aggression, and passivity. The results of the factor analysis with varimax rotation validated the assumptions of the developers of the scale that the motivators could be grouped into sensory, escape, attention, and tangible reinforcers. These four subscales are easily interpretable and should continue to provide valuable information.

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