Gezonde studenten Not relevant
Conditions
Interventions
Participants will visit the lab three times. In two lab sessions, separated by
one week, participants will orally consume one capsule containing 200mg of pure
caffeine (a similar amount of caffeine
Sponsors
Universiteit Leiden
Eligibility
Age
18 Years to 99 Years
Inclusion criteria
Inclusion criteria: - Female - Age 18-25 years - Consuming less than 100mg of caffeine (about one cup of coffee) per day on average - Fluent in Dutch language
Exclusion criteria
Exclusion criteria: - Severe physical or psychological morbidity that would adversely affect participation - Habitual smoking - Use of psychopharmaceutics
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| a) The change in performance (as measured with reaction times; RTs) on two cognitive tasks (n-back task & switch task) after caffeine consumption, relative to placebo consumption. We expect performance to improve (RTs to decrease) after caffeine consumption. b) The change in the ratio between EEG measured theta and beta oscillations after caffeine consumption (relative to placebo consumption). We expect theta/beta ratio to decrease after caffeine consumption, thereby mediating the effects of caffeine on cognitive performance. | — |
Secondary
| Measure | Time frame |
|---|---|
| a) The moderating effects of baseline dopamine activity (measured with baseline spontaneous eye blink rates and theta/beta ratio) on the effects of caffeine on cognition. b) The possible confounding effects of self-reported ADHD symptoms, sleepiness, and anxiety on the effects of caffeine on cognition. | — |
Countries
Netherlands
Outcome results
None listed