geen aandoening nvt
Conditions
Interventions
The subjects will be tested three times. At each test session they will receive
one capsule (Placebo, Caffeine, or Combi).
Sponsors
Universiteit Maastricht
Eligibility
Age
18 Years to 99 Years
Inclusion criteria
Inclusion criteria: 18-35 years of age Healthy normal static binocular acuity (corrected or uncorrected) willingness to sign informed consent
Exclusion criteria
Exclusion criteria: history of cardiac, hepatic, renal, pulmonary, neurological, gastrointestinal, haematological or psychiatric illness, are excessive drinking (>20 glasses of alcohol containing beverages a week), pregnancy or lactation, use of medication other than oral contraceptives, use of recreational drugs from 2 weeks before until the end of the experiment, and any sensory or motor deficits which could reasonably be expected to affect test performance. Those volunteers who have a first-degree relative with a psychiatric disorder or a history of a psychiatric disorder will also be excluded.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| The primary outcome measure is the number of recalled words in a verbal word learning task. | — |
Secondary
| Measure | Time frame |
|---|---|
| The following secundary measures will be examined in this study: * The number of words memorized long-term in a verbal learning task. * De recognition of words in a verbal learning task. * The number of correct responses in a working memory task. * The performance on the Stroop to measure attention and inhibition. * The performance on the Digit symbol substitution task to assess complex scanning. * The speeds of responding in combination with correct responses in a psychomotor task. | — |
Countries
Netherlands
Outcome results
None listed