Forty-seven mothers estimated their pre-school children's development on a psychometrically constructed multidomain mothers' inventory. Similar data were obtained for the same children from 13 pre-school teachers. The mothers' and pre-school teachers' estimates were compared to the children's scores on
McCarthy Scales of Children's Abilities (MSCA). The mothers'inventory responses yielded convergent-divergent correlations with the MSCA results; in two domains out of seven, their standardized estimations were significantly lower than standardized MSCA scores, and in no case higher. Teachers' estimates deviated more than mothers' estimates from MSCA verbal and motor development scores, though in the latter ca8e the difference between teachera and mothers were less marked. Both mothers' and teachers' difference scores (i.e. deviation of their estimates from MSCA scores) were highly correlated with the respective MSCA scores. However, when the difference scores are adjusted for shared error variance, the correlations shrink and are in most cases non-significant.