A study was undertaken to identify the factor structure of a battery of readiness measures and to demonstrate the concurrent and predictive validity of one instrument in that battery--the Pre-Reading Screening Procedures (PSP). Concurrent validity was determined by examining the correlation of the PSP with the Metropolitan Readiness Test (MRT), while predictive validity was judged by examining the correlation of the PSP with first grade achievement. The readiness measures were obtained for 288 kindergarten children in five schools. Variables included MRT and PSP subtests, chronological age, and sex. In the following year, the Metropolitan Achievement Test (MAT) was administered to first graders in four of the schools. Concurrent validity was examined by correlating MRT and PSP total scores while predictive validity was estimated by correlating MRT and PSP total scores with MAT scores. The PSP was shown to have concurrent and predictive validity with regard to factor structure, PSP subtests were found to have substantial loadings on two factors: one reflecting visual discrimination and memory or visual/motor ability and the other reflecting discrimination and perhaps visual/auditory integration. The PSP was not represented on a factor that appeared to indicate receptive language skills. (FL)