A cross-cultural test measuring need-achievement motivation was developed and administered to 634 American Indian, Spanish American and Anglo high school seniors attending 24 schools, including Federal, public and private boarding and day types. Need-achievement was related to the following types of measures: academic, aptitude, intelligence, and self-efficacy. A factor analysis of 104 test items yielded 3 factor dimensions. The first delineated a broad achievement, aspiration, teacher rating, and aptitude factor; a second yielded a more specific academic achievement and clustering of specific aptitudes; and a third factor is principally defined by a generally positive clustering of positive semantic differential measures. The validation of the test is judged as sufficient to warrant a follow-up study for the comparative purpose of establishing the most absolute validity possible, for both academic and nonacademic predictor variables. Part I of this document deals with the test product itself. Part II is devoted to the methodology and validation of the need-achievement test. (Author/JH)