The purpose of the present research was to report the validation of the pictorial motivation scale in English. This scale is designed for adolescents and adults with an intellectual disability who are unable to independently read a questionnaire. The scale has a picture and phrase depicting 16 items related to participation in sport and physical activity; four for each of the following subscales, intrinsic motivation, self-determined extrinsic motivation, non self-determined extrinsic motivation, and amotivation. Phase 1 of the research describes the formal translation of the scale from French to English. Results from three studies conducted with Special Olympians (Phase 2) and adolescents in a special school (Phases 3 and 4) provided support for the internal consistency, test–retest reliability, and factorial and construct validity of the scale. Overall, the scale would appear to be sufficiently reliable and valid to warrant its continued use and further development.