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Biomedical subjects

R A Grauer

Publications and source records attributed to R A Grauer.

3 recordsLinked to original sources
PubMed1981

Attention factors in contralateral threshold shift.

Young adults (2 F, 1 M) in a sound room tracked fixed-frequency Bekesy threshold in the L ear to a 3-kc/s tone for 4 min before, and for 4 min after, receiving in the R ear either a 13-min fatiguing .5-kc/s tone at 75 db SPL, or 13 min silence. Half the time S, when receiving the fatiguing tone, read a magazine, and half the time attention was directed to the R ear. In the control condition with no fatiguing tone, S read half the time and half the time counted soft tone pips in the R ear. Only when S's attention was directed to the fatiguing tone did threshold rise. In other cases, threshold dropped. Results are discussed in terms of central-attentional variables and recovery from fatigue.

Attention↗
PubMed1980

Central fatigue in a perstimulatory paradigm.

Two experiments were performed to study perstimulatory auditory "central fatigue." In Exper. I, Ss tracked threshold for 13 min at .3, .6, 1,2,3, or 4 kc/s while being stimulated in the contralateral ear by a .5-kc/s tone at 75 db SPL. Bekesy tracings showed a significantly rising threshold at 2, 3, and 4 kc/s. In Exper. II, Ss tracked threshold for 13 min of a 3-kc/s pulsed tone while a .5-kc/s tone pulsed simultaneously at 75 db SPL in the contralateral ear. Results from previous central-masking research would predict an enhanced effect, while results from ipsilateral fatigue studies would predict a much reduced effect. The data showed virtually no effect at all, thus supporting a fatigue hypothesis.

Acoustic Stimulation↗