Trial · NCT07641335
Effects of Caffeine on Chess Performance and Cognitive Function in Professional Chess Players
NCT07641335, Not applicable, Recruiting, St. Louis University
3 sourcestrials-2026-11-12-0.5.0
Cite this record
ConductScience Library. Effects of Caffeine on Chess Performance and Cognitive Function in Professional Chess Players. Trials, record NCT07641335. Release trials-2026-11-12-0.5.0, 12 Nov 2026. https://conductscience.org/library/trials/NCT07641335
On this page
Trial
As registered on ClinicalTrials.gov, in the graph's capture of the registry.
- Title
- Effects of Caffeine on Chess Performance and Cognitive Function in Professional Chess Players
- NCT number
- NCT07641335
- Status
- Recruiting
- Phases
- Not applicable
- Enrollment
- 12 participants, estimated
- Lead sponsor
- St. Louis University
- Conditions
- Cognitive Performance, Attention, Reaction Time, Caffeine
- Interventions
- Caffeinated Coffee, Decaffeinated Coffee Placebo
- First posted
- 2026-06-11
- Last updated
- 2026-09-30
Source ClinicalTrials.gov
Registered outcomes8
Each outcome the trial registered, primary first, in ClinicalTrials.gov's words.
| List | Outcome | Time frame | Description |
|---|---|---|---|
| Primary | Chess Performance Accuracy | 30 minutes after beverage consumption through completion of the tournament-style chess game at each experimental visit. | Chess performance accuracy will be assessed using engine-based analysis of tournament-style chess games. The primary reported metric will be average centipawn loss per move, with lower values indicating better chess performance accuracy. |
| Secondary | Puzzle Rush Correct Responses | Approximately 30 minutes after beverage consumption at each experimental visit. | Tactical accuracy will be assessed using the 3-minute Puzzle Rush task on Chess.com. The outcome will be the total number of correctly solved tactical puzzles, with higher scores indicating better tactical accuracy. |
| Secondary | Puzzle Rush Response Speed | Approximately 30 minutes after beverage consumption at each experimental visit. | Response speed will be assessed using the 3-minute Puzzle Rush task on Chess.com. The outcome will be average response time per puzzle, with lower values indicating faster response speed. |
| Secondary | Stroop Test Performance | Before gameplay and immediately after gameplay at each experimental visit. | Selective attention will be assessed using the Stroop Test. The outcome will be the change in Stroop Test completion time from before gameplay to immediately after gameplay, with lower completion time indicating better performance. |
| Secondary | Trail Making Test Performance | Before gameplay and immediately after gameplay at each experimental visit. | Cognitive flexibility and processing speed will be assessed using the Trail Making Test. The outcome will be the change in Trail Making Test completion time from before gameplay to immediately after gameplay, with lower completion time indicating better performance. |
| Secondary | Self-Reported Alertness | Pre-game and immediately post-game at each experimental visit. | Self-reported alertness will be assessed using a study-specific visual analog questionnaire. Higher scores will indicate greater perceived alertness. |
| Secondary | Self-Reported Mental Fatigue | Pre-game and immediately post-game at each experimental visit. | Self-reported mental fatigue will be assessed using a study-specific visual analog questionnaire. Higher scores will indicate greater perceived mental fatigue. |
| Secondary | Average Time Per Move | From the start of the tournament-style chess game until game completion, assessed over approximately 3 to 4 hours at each experimental visit. | Chess time management will be assessed as the average time used per move during each tournament-style chess game. This value will be calculated from the total game time divided by the number of moves completed by the participant. |
Source ClinicalTrials.gov
Outcomes0
Each outcome the trial posted results for, in ClinicalTrials.gov's words.
None in this release.
Results by group0
Each measurement the trial posted, group by group, in the words and numbers it posted.
None in this release.
Participant flow0
How many started, completed or left each group, period by period.
None in this release.
Adverse events0
Each adverse event the trial posted, group by group: the participants affected out of those at risk.
None in this release.
Adverse event totals0
The totals the trial posted for each group.
None in this release.
Papers0
The papers the trial lists on ClinicalTrials.gov.
None in this release.
Grants0
The grants NIH RePORTER links to the trial, newest funded first: NIH's, and some of AHRQ's, CDC's, FDA's and VA's. Each shows its title, principal investigators, organization and funder in its newest year.
None in this release.
Trial comparisons0
Comparisons of the trial's two groups, calculated by ConductScience from the counts it posted.
None in this release.
Tests3
The ConductCognition tests this trial's registered outcomes name, as ScienceGraph matched them in trial-tests-2026-11-12-0.2.1.
| Test | Named as | Source |
|---|---|---|
| Stroop Color-Word Test | Secondary outcome | ConductCognition |
| Trail Making Test A | Secondary outcome | ConductCognition |
| Trail Making Test B | Secondary outcome | ConductCognition |
Data dates
The day each source was copied for this release.
Sources 3
- ClinicalTrials.gov's posted results, through CTTI's AACTFreely available. Acknowledgement requested
- ClinicalTrials.govNo license stated
- NIH RePORTER's clinical studies and project filesPublic domain
Each source's terms
- ClinicalTrials.gov's posted results, through CTTI's AACTClinicalTrials.gov data via Aggregate Analysis of ClinicalTrials.gov (AACT), CTTI. CTTI makes its materials freely available and requests acknowledgement. https://aact.ctti-clinicaltrials.org/documentation/299
- ClinicalTrials.govnone stated
- NIH RePORTER's clinical studies and project filesPublic domain (NIH RePORTER)
ClinicalTrials.gov's data carry an international copyright outside the United States: https://clinicaltrials.gov/about-site/terms-conditions.
For software
Read this trial from software.
The record and each of its lists are JSON, twenty rows a page. No key.
GET https://conductscience.org/api/trials/v1/NCT07641335
GET https://conductscience.org/api/trials/v1/NCT07641335/registered