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Biomedical subjects

L L Avant

Publications and source records attributed to L L Avant.

3 recordsLinked to original sources
PubMed1990

Alcohol impairs visual presence/absence detection more for females than for males.

Ninety subjects (45 males, 45 females) were given 0.0, 0.5, or 1.0 ml/kg body weight of 190-proof ethanol and tested for chance-level presence/absence detection thresholds with energy-masked presentations of traffic signs and blank inputs. Alcohol produced higher blood alcohol concentration (BAC) levels, and higher detection threshold durations, for females than for males. These results indicate that alcohol influences precortical visual processing and that the influence is greater for females than for males. The higher bioavailability of alcohol in women is likely due to less gastric oxidation of ethanol in women than in men.

Adult↗
PubMed1975

Stimulus familiarity modifies perceived duration in prerecognition visual processing.

Three experiments further explored the Avant, Lyman, and Antes finding that, during prerecognition processing, differences in subjects' familiarity with letters, words, and nonwords generate differences in the apparent duration of tachistoscopic flashes. The results replicate and extend the earlier findings, showing apparent duration differences with a variety of verbal stimuli over a range of tachistoscopic exposure intervals. The results also suggest that exposures of stimuli on early trials of an experiment reduce differences in preexperimental stimulus familiarity such that unfamiliar stimuli come to be processed more nearly like familiar stimuli. Familiarity acquired on early trials appears to accumulate at prerecognition levels of processing and to reduce apparent duration differences among stimuli on later trials.

Adolescent↗