This report is Part I of a 3 part project report on THE VALIDATION OF A BIOGRAPHICAL INVENTORY AS A PREDICTOR OF COLLEGE SUCCESS. This part, dealing with the development and validation of a scoring key for the Biographical Inventory, covers the major quantitative analysis of the data. Part II is concerned with sociometric and interview contingency factors in college success. Part III is an intensive study of discordant cases. The classes of 1958 and 1959 at Fordham College provided the initial and cross-validation samples. Although academic achievement was taken into account, the criterion of college success emphasized nonintellectual factors and was shown to be differentiable from the usual grade-point average criterion. Analysis of other aptitude, achievement, personality, and interest tests indicated that the Biographical Inventory differentiated more effectively than the other predictors. Possibilities for further research in other college environments are suggested. (Author/DS)