NSCST

The test can be used alone or in combination with other Stroop measures within a cognitive, or neuropsychological, battery of tests. Two sets of cards-one with matching color bars ("color congruent") and one with non-matching color bars ("color incongruent")-to contrast the speed (cards per second) with which the individual sorts the cards onto a large laminated sheet showing locations for each color. The difference between the congruent and incongruent trials reveals the degree of Stroop interference, hence the "Stroop Effect." The effect score can then be converted to a national percentile or standard score for the test taker's age group to assess the magnitude of any unusually large difference in sorting speed, showing evidence of process deficits.