The Factorial Validity of the Adult Selfexpression Scale with American Indians

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Abstract
A commonly used self-report assertion measure, the Adult Self-Expression Scale (ASES) was factor analyzed to shed light on the structure of the instrument and dimension of assertion with an American Indian population. Data were analyzed using a principal factors solution. The occurrence of considerable unique factor variance differed from the findings of earlier factor analytic studies with non-Indian populations. The situation-specific theory of assertive behavior of previous validation studies was supported. Items comprising the factors of this analysis provide the clinician and social skills trainer with precise information of the salience of situationally-specific issues of American Indian assertion. The results not only support the use of the ASES as a screening and outcome instrument for assertion training with American Indian clients, but also point to the need for greater specificity concerning the ethnicity of the personal component of the scale.

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