Duker P C, Sigafoos J
University of Nijmegen, The Netherlands.
Res Dev Disabil. 1998 Mar-Apr;19(2):131-41. doi: 10.1016/s0891-4222(97)00047-4.
The psychometric properties of the Motivation Assessment Scale (MAS) were examined. Specifically, reliability, internal consistency, and construct validity were estimated using 90 ratings of different problem behaviors among 86 individuals with mental retardation. Data were analyzed under conditions of (a) three topographies of problem behavior and (b) two methods of calculation. Although reliability and internal consistency were generally poor, the results depended upon the above conditions. Factor analysis revealed that the four factors of the MAS differed from the subscale structure obtained in this study, proposed by the authors of the MAS. Thus, the construct validity of this scale was ambiguous. It is concluded that the MAS should be employed in conjunction with other instruments to assess the functional characteristics of problem behavior with individuals who have mental retardation.
对动机评估量表（MAS）的心理测量特性进行了检验。具体而言，使用对86名智力障碍个体的90种不同问题行为的评分来估计信度、内部一致性和结构效度。在（a）问题行为的三种表现形式和（b）两种计算方法的条件下对数据进行了分析。尽管信度和内部一致性总体较差，但结果取决于上述条件。因素分析表明，MAS的四个因素与该量表作者提出的、本研究中获得的分量表结构不同。因此，该量表的结构效度不明确。得出的结论是，在评估智力障碍个体的问题行为功能特征时，应将MAS与其他工具结合使用。
