TY - JOUR
T1 - Effects of caffeine on cognitive and autonomic measures in heavy and light caffeine consumers
AU - Lyvers, Michael
AU - Brooks, Janine
AU - Matica, Deborah
PY - 2004/5
Y1 - 2004/5
N2 - Caffeine effects on arousal and cognition were assessed in relation to habitual caffeine intake. After drinking either decaffeinated coffee or decaffeinated coffee plus 300 mg caffeine, 22 heavy caffeine consumers (HCCs) and 26 light caffeine consumers (LCCs) were examined on various cognitive, autonomic, and anxiety measures. In LCCs only, caffeine significantly improved performance of the Wisconsin Card Sorting Test, and significantly increased state anxiety scores. Caffeine significantly increased spontaneous skin conductance responses in HCCs and LCCs alike. The HCCs and LCCs did not differ on measures of trait anxiety or neuroticism. Results are discussed in terms of the cognitive enhancing and nonspecific arousing effects of caffeine in relation to caffeine tolerance.
AB - Caffeine effects on arousal and cognition were assessed in relation to habitual caffeine intake. After drinking either decaffeinated coffee or decaffeinated coffee plus 300 mg caffeine, 22 heavy caffeine consumers (HCCs) and 26 light caffeine consumers (LCCs) were examined on various cognitive, autonomic, and anxiety measures. In LCCs only, caffeine significantly improved performance of the Wisconsin Card Sorting Test, and significantly increased state anxiety scores. Caffeine significantly increased spontaneous skin conductance responses in HCCs and LCCs alike. The HCCs and LCCs did not differ on measures of trait anxiety or neuroticism. Results are discussed in terms of the cognitive enhancing and nonspecific arousing effects of caffeine in relation to caffeine tolerance.
UR - http://www.scopus.com/inward/record.url?scp=2442610586&partnerID=8YFLogxK
U2 - 10.1080/00049530410001688119
DO - 10.1080/00049530410001688119
M3 - Article
AN - SCOPUS:2442610586
SN - 0004-9530
VL - 56
SP - 33
EP - 41
JO - Australian Journal of Psychology
JF - Australian Journal of Psychology
IS - 1
ER -