The genetic factor structure of a range of learning measures was explored in twin children, recruited in preschool and followed to Grade 2 ("N"?=?2,084). Measures of orthographic learning and word reading were included in the analyses to determine how these patterned with the learning processes. An exploratory factor analysis of the…

To determine if children who have been taught to read using the i.t.a. would write stories with a vocabulary more nearly approaching the variety and extent of their oral vocabulary than would children who had been taught traditional orthography (T.O.), comparisons were made between 82 experimental (i.t.a.) and 80 control (T.O.) subjects matched on…