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Biomedical subjects

W B Webb

Publications and source records attributed to W B Webb.

At least 73 records · Page 4Linked to original sources
PubMed1976

Effect of two experimental sets on sleep structure.

The effect of four perceptual sets--First Night in a sleep laboratory, Second Night in a sleep laboratory, Shock Avoidance Night, Reward Night--on the distribution of sleep was examined with 12Ss. Both the shock avoidance and the reward conditions gave results similar to those characteristically found in the First Night Effect, i.e., increases in Stage 0, Stage 1, the latency to Stage 4, the number of Awakenings, and the number of Stage Changes coupled with a decrease in Stage 1-REM. The observed effects, however, were minimal and were interpreted as giving evidence for the sturdiness of the sleep process.

Acoustic Stimulation↗
PubMed1975

Time estimates in a long-term time-free environment.

Subjects in a time-free environment for 14 days estimated the hour and day several times a day. Half of the subjects were under a heavy exercise regime. During the waking hours, the no-exercise group showed no difference between estimated and real time, whereas the exercise group showed significantly shorter estimated than real time. Neither group showed a difference after the sleeping periods. However, the mean accumulated error for the two groups was 48.73 hours and was strongly related to the displacements of sleep/waking behavior. It is concluded that behavioral cues are the primary determinants of time estimates in time-free environments.

Circadian Rhythm↗
PubMed1971

Stage 4 sleep: influence of time course variables.

Age, length of prior wakefulness, length of time asleep, and a circadian influence all affect stage 4 sleep. The amount of stage 4 sleep decreases as subject's age increases and as time asleep increases. Longer periods of wakefulness before sleep result in greater amounts of stage 4 sleep in the first 3 hours of sleep. Sleep periods that begin at times other than the regular onset time tend to produce less stage 4 sleep; this decrease suggests a circadian effect.

Adolescent↗
PubMed1971

Sleep stage and personality characteristics of "natural" long and short sleepers.

A group of college freshmen that typically slept 5(1/2) hours or less per night and a group that typically slept 9(1/2) hours or more did not differ significantly on a battery of personality, scholastic, and medical measures. Compared with control subjects not selected on a sleep length criterion, electroencephalograph recordings of the short sleepers contained reduced amounts of stage 2 and rapid eye movement sleep.

Aptitude Tests↗