title: Excess coffee consumption in simulated complex work settings: detriment or facilitation of performance?
abstract: Twenty-four managers who normally consume between 400 and 1,000 mg of caffeine per day participated in all-day quasi-experimental simulations. In a crossover, doubleblind design, they made complex managerial decisions either on treatment with their typical daily dose of caffeine or on treatment with 400 mg of caffeine in excess of daily consumption. The effect of caffeine treatment on various validated performance indicators was investigated. The impact of excess caffeine consumption was mild. Increased caffeine facilitated speed of response to incoming information but decreased utilization of opportunity. No significance was obtained for other measures of managerial effectiveness (such as activity, breadth, strategy, and emergency response).
authors.affiliation: Department of Behavioral Science, Pennsylvania State University, College of Medicine, Hershey 17033, USA.
authors.forename: S
authors.initials: S
authors.lastname: Streufert
authors.forename: U
authors.initials: U
authors.lastname: Satish
authors.forename: R
authors.initials: R
authors.lastname: Pogash
authors.forename: D
authors.initials: D
authors.lastname: Gingrich
authors.forename: R
authors.initials: R
authors.lastname: Landis
authors.forename: J
authors.initials: J
authors.lastname: Roache
authors.forename: W
authors.initials: W
authors.lastname: Severs
mesh_terms: D000328:Adult; D002110:Caffeine / Q000009:adverse effects*; D003069:Coffee / Q000009:adverse effects*; D018592:Cross-Over Studies; D003659:Decision Making, Organizational; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011930:Reaction Time / Q000187:drug effects; D017132:Workplace
chemical_list: D003069:Coffee; D002110:Caffeine