Effects of Caffeine on Cognitive Performance and Mood essays

Effects of Caffeine on Cognitive Performance and Mood essays There is a wealth of research demonstrating that caffeine can improve aspects of cognitive performance and mood, but few has concluded that caffeine could enhance working memory. This study measured the effects of caffeine on several measures of alertness and cognitive performance, while cognitive performance focused on tasks that need the use of working memory. Forty-eight undergraduates at the University of Hong Kong participated in the study. They were asked to perform in three tasks, i.e. the finger tapping task, forward digit span task and backward digit span task, and were also asked to fill out an alertness questionnaire. The level of alertness and psychomotor speed were significantly increased, but there were no significant differences in the performance of the working memory tasks. Discussion focuses on whether caffeine could really have an effect on cognitive performance or that it only induces effects on certain cognitive tasks. It has been suggested that glucose when comb ined with caffeine would enhance memory, but not when consuming caffeine alone, and this is the area which we find it beneficial to all and worth having further research on. Caffeine is present in many widely consumed drinks, such as coffee, tea or coke; but very few of us would stop and think about its effects on our alertness and cognitive performance. There is now a very large literature on the behavioural effects of caffeine, and it has remained the subject of debate despite the years of research. However, one difficulty faced by researchers trying to determine the effects of caffeine is that the research evidence is always far from consistent. For example, many studies found that consuming caffeine would reduce reaction time comparing with a placebo (e.g. Scholey and Kennedy 2004; Yeomans et al. 2002), but on the other hand, some studies failed to find any effect of caffeine on mood or performance (e.g. Foreman et al. 1989; Smith et al. 1997). T...

Grade Point Average (GPA) and Graduate School Admission

Grade Point Average (GPA) and Graduate School Admission Your GPA or grade point average is important to admissions committees, not because it signifies your intelligence, but because it is a long-term indicator of how well you perform your job as a student. Grades reflect your motivation and your ability to do consistently good or bad work. Generally, most masters programs require minimum GPAs of 3.0 or 3.3, and most doctoral programs require minimum GPAs of 3.3 or 3.5. Usually, this minimum is necessary, but not sufficient, for admission. That is, your GPA can keep the door from shutting in your face but many other factors come to play in getting accepted to graduate school and your GPA  usually wont guarantee admission, no matter how good it is.   Course Quality Can Trump Your Grade Not all grades are the same, though. Admissions committees study the courses taken: a B in Advanced Statistics is worth more than an A in Introduction to Pottery. In other words, they consider the context of the GPA: Where was it obtained and of what courses is it comprised? In many cases, its better to have a lower GPA composed of solid challenging courses than a high GPA based on easy courses like Basket Weaving for Beginners and the like. Admissions committees study your transcript and examine your overall GPA as well as the GPA for the courses relevant to the programs to which youre applying (e.g., GPA in science and math courses for applicants to medical school and graduate programs  in the sciences). Ensure that youre taking the right courses for the graduate program to which you plan to apply. Why Turn to Standardized Exams? Admissions committees also understand that applicants grade point averages often cant be meaningfully compared. Grades can differ among universities: an A at one university may be a B at another. Also, grades differ among professors in the same university. Because grade point averages are not standardized, its hard to compare applicants GPAs. Therefore admissions committees turn to standardized exams, like the GRE, MCAT, LSAT, and GMAT, to make comparisons among applicants from different universities. Therefore if you have a low GPA, it is essential that you try your best on these tests. What If I Have a Low GPA? If it is early in your academic career (for example you are in your sophomore year or beginning your junior year) you have time to boost your GPA. Remember that the more credits you have taken, the harder it is to raise your GPA, so try to catch a spiraling GPA before it does much damage. Heres what you can do before it’s too late. Try your best. (This is a given.)Take high-quality courses. Sure, its easy to raise your GPA with introductory courses and so-called easy As but admissions committees will see through those tactics. A lower GPA composed of high-quality courses will do you more good than a high GPA composed of easy courses.Take more classes. Dont just take the minimum number of courses needed to graduate. Instead, take more courses so that you have more opportunities to raise your GPA.Take summer courses. Summer classes are intense but they permit you to focus entirely on one (or two) classes, which means that youre likely to do well.Consider delaying graduation. Spend an extra semester or more in school to take courses to raise your GPA.After graduation, take a few graduate courses or challenging undergraduate courses to show your aptitude. Point to your performance in these classes as an indicator of your capacity for graduate work.