Effects of Chronic LSD Usage on Sensory Perception
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Authors
Koss, Lynda Sue
Ryan, Ann
Issue Date
1968
Type
Thesis
Language
en_US
Keywords
Alternative Title
Abstract
Evoked responses to visual and auditory stimuli were
recorded from the cortex in two groups of subjects, a group
of normals and a group of chronic LSD users. A comparison
of the evoked responses was made to determine if there were
any significant differences between the two groups. Results
showed that there were no significant differences on either
measure. The two groups were also tested on the Kinesthetic
Figural Aftereffects procedure. Each subject was then termed
a reducer or augmenter on the basis of his bar score; a score
above the median for each group indicating an augmenter, a
score below the median for each group indicating a reducer.
Although the results were in the predicted direction, there
was no significant difference between the number of reducers
and the number of augmenters in the two groups. A rank order
correlation revealed a high correlation between the Kinesthetic
Figural Aftereffects scores and the light amplitude-intensity
slopes for the normals which did not exist for the LSD group.
Description
iv, 23 p.
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