Effects of caffeine on prospective duration judgements of various intervals depend on task difficulty

Gruber, Ronald P.; Block, Richard A.

doi:10.1002/hup.687

Cited by 17 publications

(8 citation statements)

References 35 publications

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“…A number of studies have shown that when arousal level is increased, participants are prone to underestimating time intervals, which has been attributed to an increase in pacemaker pulse rate (Gruber and Block 2005;Meck 1996;Penton-Voak et al 1996). In addition, distortions in time have also been reported due to attentional shifts by a distractor or unexpected event that changes the rate of information processing and thus the perception of elapsed time (Eagleman et al 2005;Tse et al 2004).…”

Section: Discussionmentioning

confidence: 99%

Motor preparation of spatially and temporally defined movements: evidence from startle

Maslovat

Hodges

Chua

et al. 2011

Journal of Neurophysiology

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Previous research has shown that the preparation of a spatially targeted movement performed at maximal speed is different from that of a temporally constrained movement (Gottlieb et al. 1989b). In the current study, we directly examined preparation differences in temporally vs. spatially defined movements through the use of a startling stimulus and manipulation of the task goals. Participants performed arm extension movements to one of three spatial targets (20°, 40°, 60°) and an arm extension movement of 20°at three movement speeds (slow, moderate, fast). All movements were performed in a blocked, simple reaction time paradigm, with trials involving a startling stimulus (124 dB) interspersed randomly with control trials. As predicted, spatial movements were modulated by agonist duration and timed movements were modulated by agonist rise time. The startling stimulus triggered all movements at short latencies with a compression of the kinematic and electromyogram (EMG) profile such that they were performed faster than control trials. However, temporally constrained movements showed a differential effect of movement compression on startle trials such that the slowest movement showed the greatest temporal compression. The startling stimulus also decreased the relative timing between EMG bursts more for the 20°movement when it was defined by a temporal rather than spatial goal, which we attributed to the disruption of an internal timekeeper for the timed movements. These results confirm that temporally defined movements were prepared in a different manner from spatially defined movements and provide new information pertaining to these preparation differences.

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Section: Discussionmentioning

confidence: 99%

Motor preparation of spatially and temporally defined movements: evidence from startle

Maslovat

Hodges

Chua

et al. 2011

Journal of Neurophysiology

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“…There are several non-exclusive explanations of this effect. Possibly, caffeine is able to facilitate attention allocation that is necessary to locate a target [49]. On the other hand, caffeine could facilitate the decision making stage of visual search, which allowed BT participants to perform faster [20,50].…”

Section: Discussionmentioning

confidence: 99%

The effect of black tea on human cognitive performance in a cognitive test battery

et al. 2017

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Background: Black Tea is a widely consumed drink in the world. Evidence suggest Black Tea has stimulatory effect on humans. We investigated the effect of Black Tea on cognition using a cognitive test battery. Methods: Participants (n = 32) were fasted overnight for 10 h and restrained from caffeine and other stimulant drugs for 14 days prior to participation. We randomly assigned participants into either an experimental (n = 16) or a control (n = 16) group. Experimental group consumed 250 ml of Black Tea (BT) while control group was received equal volume of water (W). Participants were tested on the following cognitive tasks: executive function, sustained attention, memory (memory span, immediate, delayed, working memory) and arithmetic calculation task. Conclusions: BT consumption speeded the performance, improved memory, reduced number of errors in the various cognitive tasks. Our results further showed that even in small volume of BT consumption can speed up cognitive processing.

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“…However, in the caffeine condition the RT showed a stronger relationship with the alpha1 amplitude than with target probability. One possible explanation may be that caffeine has a general positive effect on general attentional resource allocation independently of the relative target probability 56 .…”

Section: Discussionmentioning

confidence: 99%

Effects of concurrent caffeine and mobile phone exposure on local target probability processing in the human brain

Trunk

Stefanics

Zentai

et al. 2015

Sci Rep

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Millions of people use mobile phones (MP) while drinking coffee or other caffeine containing beverages. Little is known about the potential combined effects of MP irradiation and caffeine on cognitive functions. Here we investigated whether caffeine intake and concurrent exposure to Universal Mobile Telecommunications System (UMTS) MP-like irradiation may interactively influence neuro-cognitive function in an active visual oddball paradigm. In a full factorial experimental design, 25 participants performed a simple visual target detection task while reaction time (RT) and electroencephalogram (EEG) was recorded. Target trials were divided into Low and High probability sets based on target-to-target distance. We analyzed single trial RT and alpha-band power (amplitude) in the pre-target interval. We found that RT was shorter in High vs. Low local probability trials, and caffeine further shortened RT in High probability trials relative to the baseline condition suggesting that caffeine improves the efficiency of implicit short-term memory. Caffeine also decreased pre-target alpha amplitude resulting in higher arousal level. Furthermore, pre-target gamma power positively correlated with RT, which may have facilitated target detection. However, in the present pharmacologically validated study UMTS exposure either alone or in combination with caffeine did not alter RT or pre-stimulus oscillatory brain activity.

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Effects of caffeine on prospective duration judgements of various intervals depend on task difficulty

Cited by 17 publications

References 35 publications

Motor preparation of spatially and temporally defined movements: evidence from startle

Motor preparation of spatially and temporally defined movements: evidence from startle

The effect of black tea on human cognitive performance in a cognitive test battery

Effects of concurrent caffeine and mobile phone exposure on local target probability processing in the human brain

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