Abstract
The objective of this research was to measure possible changes in visual size perception of patients with depression and schizophrenia. Three groups were compared: Control Group (CG), Schizophrenia Group (SchG) and Depression Group (DepG). The diameter of the first figure seen by the participants in each painting was recorded in degrees of visual angle. The SchG perceived images 1.47 larger than CG and the DepG 1.28 larger than CG, whereas SchG selected images 1.15 larger than DepG, F (2, 57) = 17.677, p < .0001. These findings suggest there are changes in visual size perception related to depression and schizophrenia.
Highlights
O objetivo desta pesquisa foi medir possíveis alterações na percepção visual do tamanho de pacientes com depressão e esquizofrenia
Our method was initially developed to evaluate patients with schizophrenia, and in the present study we extend this assessment to patients with depression
Sixty volunteers with ages 19-62 yrs old, regardless of gender were divided into three groups: Control Group (CG), Schizophrenia Group (SchG) and Depression Group (DepG)
Summary
O objetivo desta pesquisa foi medir possíveis alterações na percepção visual do tamanho de pacientes com depressão e esquizofrenia. Weckowics and Witney (1960), for instance, studied the effect of visual size perception of the MullerLyer illusion in patients with Schizophrenia and found that schizophrenics perceived larger illusion effects than controls, but the group of non-schizophrenic psychiatric patients showed larger magnitude effects than controls but, in turn, lower than schizophrenics. They could not explain those latter results
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