Abstract
Summary. From the West Indian immigrant children entering a city over a period of 16 months, those suspected by teachers as being possible slow learners were seen by a psychologist. The 14 who obtained Verbal WISC scores of less than 80 were retested after a period of about 1 1/2 to 2 1/2 years. A control group of non‐immigrant pupils of similar ability was reassessed after a similar period. In the case of every immigrant there was a rise in score, the mean rise being over 8 points of IQ. In the case of the control group the mean rise was 0·25. The difference between these means is significant. For the immigrants the test‐retest coefficient was 0·76. There was a significant positive correlation between score rise and time between tests.
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