Cognitive Hyper-performance - Effects of Stimulating Substances in Chess-players

• Status: Completed
• Trial end date: 2013-04-01
• Target enrollment: 0
• Participant gender: Male

Summary

Effects of caffeine, methylphenidate, modafinil and placebo on cognitive performance of chess players in chess games and neuropsychiatric standardized tests. We hypothesize that substances will change cognitive performance in chess players leading to changed results in chess games and neuropsychiatric tests.

• Phase: Phase 1
• Accepts Healthy Volunteers?: Accepts Healthy Volunteers

Details

• Lead Sponsor: K. Lieb
• Treatments: Armodafinil; Caffeine; Methylphenidate; Modafinil

Criteria

Inclusion Criteria:

• male

• 18-60 years old

• existence of ELO-number

Exclusion Criteria:

• physical diseases (e.g. diabetes mellitus, etc.) with necessity of using prescription drugs

• psychiatric diseases (e.g. psychosis, bipolar disorders, etc.) with necessity of using prescription drugs

• addiction of psychoactive substances

• smoker or quitter (< 5 years)

• use of more than 5 cups of coffee per day

• irregular day-night-rhythm (e.g. shift workers)