Fig. 1: Visual tasks that may elicit behavioral markers of early psychosis.
From: Visual system assessment for predicting a transition to psychosis
A Never-medicated first-episode psychosis patients (FEPs) have superior contrast sensitivity at lower spatial frequencies compared to healthy controls (HCs) [32]. B Never-medicated FEPs have a diminished ability to identify the circle that floats in stereo [35]. C FEPs need more of a temporal interval (SOA) between the target and a subsequent grid-like mask to achieve 75% accuracy on a Vernier discrimination task [42]. D Schizophrenia patients of varying illness durations benefit less from high-contrast collinear flankers when attempting to detect a central low-contrast target relative to healthy and clinical controls [45, 47]. E For FEPs, discriminating fat and thin illusory shapes is harder than discriminating left and right rotated pac-men; for HCs, the opposite is true [48]. F Compared to healthy controls, FEPs can tolerate fewer background “noise” elements when attempting to detect a circular chain of elements [50]. G Independently of illness duration, SZ patients exhibit spatially restricted eye movement patterns when freely viewing complex images [51].
