The relationship between personality and caffeine intake on various physiological and psychological responses

Abstract

A survey and an inventory were administered to investigate the relationship between caffeine ingestion and personality attributes of the 34 student volunteers. The research was carried out in two parts. Firstly, average personal doses, as determined by the survey, were administered and a reaction time task occurred. Blood pressure, heart rate and performance on various mood scales were obtained. The doses were increased on two successive sessions by increments of 50 percent and responses were monitored pre and post caffeine.