Differential effects of caffeine on free recall after semantic and rhyming tasks in high and low impulsives

Gupta, Uma

doi:10.1007/bf02316878

Cited by 19 publications

(8 citation statements)

References 27 publications

(21 reference statements)

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“…It appears that low impulsives are relatively more resistant to caffeine-pro voked variations in the organismic state. This is consis tent with our earlier studies related to cognitive perfor mance [17], kinesthetic after-effects [20], immediate free recall [18] and immediate recognition [19].…”

Section: Discussionsupporting

confidence: 68%

“…This variability in outcomes may be interpreted in terms of caffeine effects being highly task-and situation-specific. Another major difficulty in assessing and interpreting the effects of caf feine on human performance is that the drug interacts with the characteristics of the person administered the drug, particularly the trait of impulsivity [17][18][19][20][21], How ever, studies are also available where the observed effects of caffeine were not influenced by individual differences [22,23],The purpose of the present experiment was to examine the effects of caffeine on the estimation of felt width of blocks (perceptual judgment) employing haptic presenta tion in subjects having high or low positions on the scale of impulsivity. This task employing haptic presentation was specifically chosen so that caffeine effects on percep tual judgment are not confounded with the attentional factors generally associated with visual and auditory pre sentation.…”

mentioning

confidence: 99%

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Effects of Caffeine on Perceptual Judgment

1994

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The present study examined the effects of caffeine on the estimation of felt width of blocks employing haptic presentation. Following a between-subject design, 160 male postgraduate students classified as high or low impulsives received either placebo or one of four doses of caffeine citrate (1, 2, 3 and 4 mg/kg body weight). A double-blind procedure was adopted for drug administration. Caffeine produced differential effects on the performance of high and low impulsives, facilitated performance (decreased error in perceptual judgment) in high impulsives but had no influence on the performance of low impulsives. The dose-response trends also followed different patterns in the two groups of subjects.

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Section: Discussionsupporting

confidence: 68%

mentioning

confidence: 99%

Effects of Caffeine on Perceptual Judgment

1994

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“…In this test, caffeine facilitated acquisition and recall in high-impulsive subjects after rhyming acquisition, but hindered it after semantic acquisition. Caffeine did not reliably influence recall in low-impulsives [17].…”

Section: Caffeine and Incidental Versus Intentional Learningmentioning

confidence: 66%

Is Caffeine a Cognitive Enhancer?

Nehlig

2010

JAD

307

252

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Abstract. The effects of caffeine on cognition were reviewed based on the large body of literature available on the topic. Caffeine does not usually affect performance in learning and memory tasks, although caffeine may occasionally have facilitatory or inhibitory effects on memory and learning. Caffeine facilitates learning in tasks in which information is presented passively; in tasks in which material is learned intentionally, caffeine has no effect. Caffeine facilitates performance in tasks involving working memory to a limited extent, but hinders performance in tasks that heavily depend on working memory, and caffeine appears to rather improve memory performance under suboptimal alertness conditions. Most studies, however, found improvements in reaction time. The ingestion of caffeine does not seem to affect long-term memory. At low doses, caffeine improves hedonic tone and reduces anxiety, while at high doses, there is an increase in tense arousal, including anxiety, nervousness, jitteriness. The larger improvement of performance in fatigued subjects confirms that caffeine is a mild stimulant. Caffeine has also been reported to prevent cognitive decline in healthy subjects but the results of the studies are heterogeneous, some finding no age-related effect while others reported effects only in one sex and mainly in the oldest population. In conclusion, it appears that caffeine cannot be considered a 'pure' cognitive enhancer. The indirect action of caffeine on arousal, mood and concentration contributes in large part to its cognitive enhancing properties.

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“…The effect of caffeine on impulsivity has also been studied, although to a caffeine on duration judgementslimited extent. Caffeine appears to facilitate recall in high impulsives but not low impulsives (Gupta, 1991). This suggests that caffeine should increase duration estimates in the retrospective paradigm, in which recall may be a factor (see also Anderson and Revelle, 1982).…”

Section: Impulsivity and Caffeinementioning

confidence: 97%

Effect of caffeine on prospective and retrospective duration judgements

Gruber

Block

2003

Human Psychopharmacology

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The effects of caffeine on prospective and retrospective duration judgements were evaluated in a double-blind placebo-controlled experiment. After taking either 200 mg caffeine or a placebo, participants touched a 17-sided polygon for 15 s. Then they verbally estimated the number of angles and the duration. Participants in the prospective group were told in advance they would be making a duration estimate, whereas those in the retrospective group were not told. Caffeine reduced duration estimates in the prospective condition but not in the retrospective condition. The effect of caffeine on very long duration comparisons (the past year compared with a year at one-half and one-quarter of one's age) was also evaluated, but none was found. The findings do not support the hypothesis that caffeine affects duration experience by increasing the internal clock rate as a result of its dopamine D(2) agonist properties. The hypothesis that caffeine produces its effect by enhancing memory was considered and rejected. The most parsimonious explanation is that caffeine increased arousal level, which led to a narrowing of the focus of attention to the most salient task.

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Differential effects of caffeine on free recall after semantic and rhyming tasks in high and low impulsives

Cited by 19 publications

References 27 publications

Effects of Caffeine on Perceptual Judgment

Effects of Caffeine on Perceptual Judgment

Is Caffeine a Cognitive Enhancer?

Effect of caffeine on prospective and retrospective duration judgements

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