‘‘grade average.’’ Table 1 shows th

‘‘grade average.’’ Table 1 shows the results of a pair by-pair comparison, evaluated by means of a t test of differences. The table shows that differences in grade level achievement, reading, and arithmetic, favoring children with deaf parents in each instance, were significant at the 1% level of confidence or beyond. The average discrepancy in scores was .1 year for grade level and arithmetic and .2 years for reading.