Number of items stored in WM (K ± standard error of the mean) from experiment 2. (A) The mean number of items stored for each condition, (B) the filtering cost for each of the 3 distractor conditions. 3:0 = 3 Targets, 0 Distractors; RR = 3 Targets, 2 Rotating-Red Distractors; RY = 3 Targets, 2 Rotating-Yellow Distractors; SY = 3 Targets, 2 Stationary-Yellow Distractors. K was lower in PSZ compared with HCS for all 4 conditions (P < .001), yet PSZ and HCS did not differ in K
DIFF for any of the 3 distractor types (P’s > .23). PSZ exhibited larger K
RATIO in the RY condition only (P = .03). HCS = healthy control subject; PSZ = people with schizophrenia; WM = working memory.