Publisher's Synopsis
Excerpt from The Effects of the Relative Difficulty of Mental Tests on Patterns of Mental Organization
The interests of Thorndike in a test like the cavd, supposedly measuring difierent levels of difficulty, have resulted in some studies by himself and his students on the relation between easy and M cult material. In The Measurement of Intelligence Thorndike presents evidence indicating that the more remote from each other difierent levels of the cavd are, the smaller their correlations will be. Thus, he presents correlations (33, 558, Table 154) between levels N and O of 68, but between N and Q of 47 between 0 and P, 65, while between 0 and Q there is a correlation of 43. In another table (p. 560) we find that the correlation between I and J is equal to 59, while that between I and M is 49. Similar results may be found for various other combinations of levels, even at the very low ones. Using the levels A to D on a group of 98 imbeciles, Thorndike finds a correlation between A and B of 7 8 against 52 for A and D. For B and C, a correlation of 81 as compared to one of 59 between B and D is reported. (p.
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