The relationship between anxiety and caffeinated beverages was studied using Spielberger's questionnaire and additional questions concerning the consumption of alcohol, cigarettes, and the students' estimated GPA. Subjects were 68 female and 23 male students. Consistent with previous studies, small correlations were found between anxiety, coffee, alcohol, and estimated GPA.
GoldsteinA.KaiserS.Psychotropic effects of caffeine in man. Ill: A questionnaire survey of coffee drinkers and its effects in a group of housewives. Clinical Pharmacology and Therapy, 1969, 10, 477–488.
3.
GredenJ. F.Anxiety or caffeinism: A diagnostic dilemma. American Journal of Psychiatry, 1974,131, 1089–1092.
4.
LynnR.National differences in anxiety and the consumption of caffeine. British Journal of Social and Clinical Psychology, 1973, 12, 92–93.
5.
PassiniF. T.WatsonC. G.DehnelL.HerderJ.Alpha wave biofeedback training therapy in alcoholics. Journal of Clinical Psychology, 1977, 33, 292–299.
6.
RitchieJ. M.Central nervous system stimulants. II: The xanthines. In GoodmanL. S.GilmanA. (Eds.), The pharmacological basis of therapeutics. (4th ed.) New York: Macmillan, 1970. Pp. 358–370.
7.
TruittE. B.The xanthines. In Drill's ‘Pharmacology in medicine.’ (4th ed.) New York: McGraw-Hill, 1971. Pp. 533–556.