Showing papers on "Time perception published in 1968"
TL;DR: No significant differences were found among the Pleasant, Unpleasant, and Neutral conditions, although Ss tended to underestimate the Neutral condition relative to the others, and a moderate correlation was found between verbal estimation and reproduction measures.
Abstract: 120 Ss reproduced and verbally estimated short (48 sec.) or long (144 sec.) durations under conditions of smelling or anticipating smelling a pleasant, unpleasant, or neutral substance. They were i...
23 citations
12 citations
9 citations
TL;DR: In this paper, a statistical decision hypothesis is outlined to account for a progressive lengthening of judgments which occurs when a series of reproductions of a time interval is made without interpolation of a standard.
Abstract: A statistical decision hypothesis is outlined to account for a progressive lengthening of judgments which occurs when a series of reproductions of a time interval is made without interpolation of a standard. Three experiments are reported in which it is found that this serial effect can be manipulated by hypothetical payoff conditions, that the effect still occurs when subjects are told to count while making their judgments, and that two successive judgments are sufficient to demonstrate the effect if enough subjects are used. The phenomenon is related to recent studies of vigilance in which statistical decision theory has been applied. It is suggested that serial reproductions of time intervals may perhaps be a more sensitive index of the factors underlying vigilance than the traditional measures involving long sessions with weak, sporadic signals.
5 citations
TL;DR: In the first of two experiments English words rated as active, passive, savory, or tasteless on the semantic differential were employed as start words for the estimation of 10-sec.
Abstract: -In the first of two experiments English words rated as active, passive, savory, or tasteless on the semantic differential were employed as start words for the estimation of 10-sec. intervals. The passive verbal stimuli resulted in a significant temporal overestimation; none of the other stimuli gave significant effects. In the second experiment, tonal stimuli rated as active, passive, or intermediate served as start stimuli and impinged upon Ss during the 10-sec. estimations. Again, the passive stimulus resulted in a temporal overestimation while the active srimulus had no significant effects. These results are viewed as pertinent to organismic theories of perception.
01 Jan 1968
TL;DR: In this article, brain rhythms were mani-elflated using intermittent photic and auditory stimulation during production of a ten-minute duration, and the results showed that times lengthen over sequential trials, and that there is an additional lengthening effect when the pattern of cortical activity is synchronous.
Abstract: The present study is an attempt to provide more than correlative evidence that brain rhythms actively influer-ce the perception of temporal. duration. Brain rhythms were mani!,mlated using intermittent photic and auditory stimulation. EEG recordings during experimental trials demonstrate the effects of these manipulations during production of a ten seoondduration. Various patterns of synchrony and a~ynchrony in brain activity can be produced by pairing frequencies of afferent activity With a subject's under~ing. spontaneous activity. Changes also occur over time in the experimental setting. This latter change may be due to changes in arousal or activation level. Subjects produced a time interval under varying conditions of intermittent and steady stimulation over forty-five trials. The results showed that times lengthen over sequential trials, and that there is an additional lengthening effect when the pattern of cor.tical activity is synchronous. It is concluded that the pattern of cortical activity as evidenced in an EEG record has a significant effect on the perception of time. A model of the physiological systems active in such activity is suggested.