“…This selective review emphasizes studies that examine the relation between the Stroop effect and components of the Stroop effect in patients with schizophrenia. For the most part, the review does not include studies that (a) employed the Stroop effect to screen subjects (Heilbrun, 1973); (b) used Stroop conditions to create a composite score, for example, a 'frontal score' (Stam et al, 1993); or (c) used only one component of the Stroop task as the dependent variable (McCormick, Toland, & O'Neill, 1980;Porterfield & Golding, 1985). In the latter case, when only the incongruent condition is used, it is not possible to look at interference, facilitation, or an overall congruency effect (incongruent minus congruent), all of which are of central interest in the current review.…”