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Results for “Perceptual Distortion”

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PubMed1995

The looming of spiders: the fearful perceptual distortion of movement and menace.

The current study examined the relation between the perception that fear-stimuli are looming and fearful cognitive distortions. As hypothesized, high-fear-of-spider Ss were significantly more likely than low-fear Ss to imagine that a spider in a room would move rapidly and selectively to them in proximity, rather than towards three other individuals in the same physical space. This finding was observed with a measure of perceptual-cognitive distortion as well as with self-reports. High-fear Ss were also more likely to perceive spiders as angry and belligerent, as intending to move towards them, and as singling them out from other people. These results suggest that perceptions of looming danger and fearful cognitive distortions are closely linked phenomena. Finally, the perception that spiders are looming and the other cognitive variables could be used to successfully classify the fear-group memberships of the Ss in 98% of the cases. Perceptions that spiders are looming made the single largest unique contribution to the discriminant classification function.

Adult↗
PubMed1981

Perceptual distortions in visual-evoked potentials.

We tested ten healthy men, ranging in age from 24 to 55 years, to determine whether "drifting" of a fixation target during pattern-stimulus testing was the result of stimulus-induced ocular movements or a purely perceptual response with no oculomotor basis. We also wanted to learn whether this drifting interfered with the development of the visual-evoked potential. We observed large intersubject differences in visual-evoked potential magnitude that could not be explained by either actual or perceived drifting. Perceived drifting did not correlate with actual or perceived drifting. Perceived drifting did not correlate with actual ocular movements. Moreover, when sporadic ocular movements occurred, they did not interfere with the visual-evoked potential; there were no correlations between magnitude of visual-evoked potential and the percentage of time that drifting was perceived.

Adult↗