Examined the effect of glucose consumption on a nonverbal, facial recognition task in young adults. Lemonade sweetened with either glucose (50 g) or saccharin (23.7 mg) was consumed by 34 college students (aged 17–45 yrs) 15 min prior to a facial recognition task. The task consisted of a familiarization phase in which Ss were presented with target faces, followed immediately by a recognition phase in which Ss had to identify the target among a random array of familiar target and novel distractor faces. Statistical analysis indicated that there were no differences on hit rate (target identification) for Ss who consumed either saccharin or glucose prior to the test. However, further analyses revealed that Ss who consumed glucose committed significantly fewer false alarms and had (marginally) higher d-prime scores (a signal detection measure) compared to subjects who consumed saccharin prior to the test. These results parallel a previous report demonstrating glucose enhancement of a facial recognition task in probable Alzheimer's patients; however, this is believed to be the 1st demonstration of glucose enhancement for a facial recognition task in healthy, young adults.
Available at: http://works.bepress.com/mitchell_metzger/11/