With the EEOC requiring empirical criterion-related validity for selection procedures, predictor variables of physical characteristics, biographical data, and personality traits were related to both on-the-job performance and training performance. In the correlational analysis of the variables, a total of 455 flight attendants from a single airline were used, with half of the subjects serving as a cross-validation sample. The results showed slight relationships between biographical data and physical characteristics to training performance but no relationship between any predictor variable and job performance. The impact of race being a significant predictor of training performance was reviewed. The lack of practical information was discussed, and implications made for future research to include proper design and reliability of screening procedures before attempting criterion-related validation.