The authors develop a 31-item instrument (ECOSCALE) for the assessment of environmental responsibility. Discussion of the conceptualization and operational functions used in constructing and refining the multiple-item scale to measure the construct environmental responsibility are described. Also presented is evidence that the scale has been validated through assessment of content validity, predictive validity, and construct validity. A final description of the theoretical uses of such a scale is provided. 0 1995 John Wiley & Sons, Inc. 596 STONE ET AL. ECOSCALE 597

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