Selected patients were subjected to two tests for detection of MHE, Number Connection Test A and Block Design Test
These mainstream tests include the Kohs Block Design Test (four haptic versions: 1960, 1966, and twice in 2002), the Wechsler intelligence scales (three haptic versions: 1964, 1990, and 1993), Raven's Progressive Matrices (two haptic versions: 1964 and 2007), the D48 (one haptic version: 1968), the Boehm Test of Basic Concepts (one haptic version: 1977), the TONI (one haptic version: 1989), and the Wisconsin Card Sorting Task (one haptic version: 2004).
Testing the nonverbal intelligence of working-age visually impaired adults: Evaluation of the adapted Kohs Block Design Test.
For the block design test
, investigators measured how well subjects copied a particular block pattern drawn on a piece of paper and how long it took them.
A block design test was used to measure nonverbal reasoning, as this is generally considered to be a good measure of NVR ability over a wide range of difficulty (Cronbach, 1984).
It should be emphasized that the block design test was employed here to measure specifically nonverbal reasoning ability and not as a test for general intelligence.
Experiment 2 used the same cognitive tests as in Experiment 1, with the exception of the Block Design Test, which was omitted because of time limitations and the failure to find correlations with this test in the previous studies.