The Effect of Tablet Size on Cognitive Performance Caffeine

Completed · Phase 4 · Has a placebo group

Conditions studied: Placebo Effect

In brief

This study aims to assess if tablet size, due to placebo effect, alters participants' performance on cognitive tests after consuming caffeine. Participants will be randomly assigned to one of four groups: 1) 90 mg caffeine with a 1 mm diameter sucrose pillule; 2) no caffeine with the small sucrose pillule; 3) 90 mg caffeine with a 5 mm sucrose pillule; 4) no caffeine with the large sucrose pillule.

Key facts

Study ID

NCT03694886

Run by

University of Colorado, Denver

People needed

120

Starts

2018-10-31

Expected to finish

2019-03-01

Last updated by the study team

2019-04-17

Who can join

Age: 18 and older, up to 40. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Fluent in written and spoken English
• Ability to see color
• No uncontrolled high blood pressure
• No allergies to caffeine or sucrose
• No history of heart disease
• No untreated anxiety or depression
• Non-pregnant
• No caffeine consumed the day of participation

You may not qualify if…

• Not fluent in written and/or spoken English
• Uncontrolled high blood pressure
• Color-blindness
• Allergies to caffeine and/or sucrose
• History of heart disease
• Untreated anxiety or depression
• Pregnant
• Consumed caffeine on the day of participation

Where it is running

• University of Colorado Denver — Denver, Colorado, United States

Full record on ClinicalTrials.gov

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