The effects of normal caffeine doses on qualitative responses of students

Abdollahi, Yosef and Massoumi, Lotfali and Ganji, Masoud (2010) The effects of normal caffeine doses on qualitative responses of students. Other thesis, University of Mohaghegh Ardabili.

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Abstract

Caffeine is found in different sources such as tea, coffee, Cola and in some kind of drugs. Caffeine is one of the most widely consumed stimulant drugs of the modern world. Also In our country, different ways of consumption of caffeine is increasing. For this reason, the scientific community is interested in this area for more researches. In this study commercial coffee, as a source of caffeine, was selected and its effect on the quality of response and reaction time were evaluated. First for this purpose, the amount of caffeine in coffee was determined through HPLC. Then reaction time and quality of response for five doses (1,2,3,4and 5 mgkg-1 body weight, in amount terms of caffeine in coffee),were tested on two age categories (youth and middle age) that each categories contained 5 different groups. Results of data analyses by using t-student method showed that the minimum dose of caffeine required for significant reduction in reaction time among the young subjects is 3mgkg-1 but the maximum reduction of reaction time caused by 4mgkg-1 of caffeine. It also revealed that the quality of response improved only at low doses of caffeine (1, 2 mgkg-1), but in other doses, there was no significant effect in this case. Among middle age only low doses of caffeine (1, 2 mgkg-1) were effective on the quality of response. At least required caffeine for significant change in reaction time among the middle age was 4mgkg-1. In spite of the changes in quality of response by caffeine consumption in both age categories, it was more tangible among the middle age group. Instead, it seems that reaction time among young people, compared with the middle age, is more affected by caffeine.

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