The Predictive Validity of the Lorge-Thorndike Intelligence Tests at the Kindergarten Level

The purpose of this study was to investigate the predictive validity of the Lorge-Thorndike Intelligence Tests (LTIT) at the kindergarten level. Seventy-nine Ss were administered the LTIT at the end of kindergarten. In mid-first grade the Ss were tested with the Metropolitan Achievement Tests. In addition, teacher grades and reading level data were collected for each S. Correlations between the LTIT and the academic criteria ranged from .46 to .62. While stepwise regression analyses revealed that the demographic variables of sex, school ability, age, and father’s occupation increased the power of prediction (multiple R’s ranged from .64 to .78), the LTIT alone was judged to be a valid predictor of academic achievement.