Abstract
Summary. Test results on the Terman‐Merrill* 1937 revision of the Stanford‐Binet Intelligence Scale (Form L) were examined for 111 ‘educationally subnormal’ boys in a residential special school. A comparison between results on entry at the age of 7 years and above, and before leaving between 14 and 16 years, showed a deterioration in mean I.Q. scores, despite the fact that the Roberts‐Mellone† (1952) corrections were applied.The proportion of ‘verbal subtests’ passed was consistently lower than the proportion of ‘non‐verbal’ tests', at all age levels.The hypothesis that the deterioration in mean I.Q. scores between mean C.A. 9⅙ and 15½ years, was due partially to the increased verbal weighting on this test at the higher age levels, was examined and supported.It was suggested that the test under consideration is unsuitable for the all‐round cognitive assessment of educationally sub‐normal‡ children. Suggestions were made for a more suitable type of test, and for further research on Terman‐Merrill (L).
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