LPP responses to probes at previous target location (red), probes at previous distractor location (blue), and probes elsewhere (green). Waveforms are derived from averages across electrodes FC1, C2 and CP1 for a) all subjects, b) people with schizophrenia (PSZ), c) controls (CTRL), and d) relatives of PSZ (REL). The x-axis represents the beginning of each 50 ms time window. Significant differences (p < .05) in time window mean amplitudes between probes at previous target locations (T), previous distractor locations (D), and elsewhere (E) are indicated with a dash between labels for differing conditions (e.g., T − E = difference between target and elsewhere). PSZ fail to show differences between conditions in the 350 ms to 550 ms time window, in contrast to CTRL and REL.