Question

Following is an Observation table by a psychometrician who conducted Koh’s Block Design test for a subject who is born on 16th September 2012. Card Number Number of Moves Time taken 1 4 20 secs 2 4 19 secs 3 4 18 secs 4 4 20 secs 5 4 26 secs 6 4 28 secs 7 4 30 secs 8 4 40 secs 9 9 50 secs 10 9 60 secs 11 9 61 secs 12 9 62 secs Find the following: 1. Total Score 2. Chronological Age 3. Mental Age 4. IQ 5. Comment on IQ​

Answer 1

The Kohs Block test, also known as the Kohs Block Design Test,[2] is a performance test designed to be an IQ test. The test taker must, using 16 colored cubes, replicate the patterns displayed on a series of test cards. The design of the test was motivated by a belief that the test could easily be administered to persons with language or hearing disabilities.[2]

A brief presentation of the Block-design Tests will be attempted in this article. These tests fall in the category of 'performance tests' and have been standardized to measure intelligence. They have been purposely devised to eliminate the factor of language. In this attempt the writer believes he has been especially successful since the instructions themselves may be given entirely through pantomime and imitation.

There has indeed been, and there still is, a great need for tests such as are here presented. In the longer monograph which the writer is preparing for publication, there will be more detailed treatment of many topics, such as the definition of intelligence; an analytic criticism of current methods of standardization; suggested newer statistical procedure; the relation between language ability, performance and intelligence; and other pertinent material.