| Abstract: | Prediction of school systems' scores on cognitive tests from average socioeconomic indices for communities has proved very helpful for several applications. It would also be useful to be able to predict within-school system variance in test scores from within-community variance in socioeconomic status. The present study examined correlations between standard deviations of test scores and an index of within-community variability in income. These correlations were of borderline significance. It was noted that correlations among test standard deviations themselves were quite low, suggesting that within-school system variance is a characteristic of less generality than school systems' median performance in different test areas. |
