| Summary: | The Poulin Pictorial Motivational Scale (PPMS) attempted to measure separately four different types of motivation; intrinsic motivation, extrinsic motivation/self-determined, extrinsic motivation/non self-determined, and amotivation. === Sixty-two high school students were tested with the PPMS. These individuals with a mild intellectual disability were grouped according to age level (12-13, 14-15, 16-18) and academic ability (low, average, high). They answered two questionnaires; the PPMS and Harter's scale (to test students' self-competency). Other scales, made for teachers, were used to assess the validity of the PPMS, a Physical Educator's rating scale and a Teachers' questionnaire. === The reliability estimates of internal consistency (Cronbach's alpha) and temporal stability were sufficiently high to conclude that the PPMS was a reliable instrument. The results also revealed that the PPMS is valid and it correlates in the expected directions with the other scales which followed the self-determination theory of Deci and Ryan (1985a). Therefore, it was concluded that the PPMS is a valid and reliable instrument. (Abstract shortened by UMI.)
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