Fig 1.

Five experimental paradigms that provide evidence of hyperfocusing in people with schizophrenia (PSZ). (A) Change detection/localization task used to measure visual working memory capacity.⁸ (B) Contralateral delay activity (CDA) experiment.¹⁹ (C) Results of an fMRI experiment using a change detection task like that shown in (A). The left side shows the region of posterior parietal cortex in which PSZ and healthy control subjects (HCS) differed in terms of the function relating activity to the number of items stored in memory, and the right side shows the signal change (relative to baseline) within this region for each set size. (D) Useful field of view experiment.²⁰ Participants report whether the central object is a car or truck and the location of the peripheral object. The timing of a mask that follows the targets is adjusted to find the 75% accuracy point (the threshold). (E) Spatial cuing experiment in which a central cue directs attention to between one and 4 potential target locations.²¹