Clinical trials data

Stroop Color-Word Test in dementia and Alzheimer's trials: 116 registered studies

Every registered dementia and Alzheimer's disease study on ClinicalTrials.gov that names the Stroop Color-Word Test in an outcome measure: how often it is a primary outcome, the tests named with it, how large the studies are and when they measure it.

Registered dementia and Alzheimer's disease studies name it in an outcome measure: 116
Name it in a primary outcome, 42%: 49 of 116
Of the condition's 1,673 studies name it, against 12% of all registered studies: 7%; Other conditions
Median participants per study: 68; By phase

Try the Stroop Color-Word Test

Tests named in the same studies

The library tests that dementia and Alzheimer's disease studies naming the Stroop Color-Word Test name most often beside it.

1
Trail Making Test63 studies, 24 as a primary outcome
2
Verbal Fluency40 studies, 20 as a primary outcome
3
Digit Span Test39 studies, 13 as a primary outcome
4
Verbal Learning32 studies, 18 as a primary outcome
5
Symbol Coding23 studies, 10 as a primary outcome
6
Category Fluency19 studies, 8 as a primary outcome
7
Short Story Recall19 studies, 7 as a primary outcome
8
Complex Figure Copy and Recall18 studies, 10 as a primary outcome
9
Selective Reminding Task14 studies, 7 as a primary outcome
10
Picture Naming Test13 studies, 7 as a primary outcome

A test as a primary outcomeOnly in secondary or other outcomes

Studies by start year

Each study counted once. 2026 is partly planned starts.

A test as a primary outcomeOnly in secondary or other outcomes

Show as a table

Registered studies by start year
Start year	Studies	A test as a primary outcome
2000	0	0
2001	1	1
2002	0	0
2003	0	0
2004	2	1
2005	2	1
2006	1	1
2007	0	0
2008	0	0
2009	1	0
2010	5	2
2011	4	1
2012	3	2
2013	0	0
2014	3	0
2015	4	2
2016	7	1
2017	6	2
2018	7	3
2019	9	6
2020	6	3
2021	9	4
2022	10	6
2023	7	3
2024	9	4
2025	10	4
2026	10	2

Phases and study sizes

By phase

Early phase 12 studies, 2 as a primary outcome
Phase 1/23 studies, 2 as a primary outcome
Phase 213 studies, 4 as a primary outcome
Phase 2/32 studies, 1 as a primary outcome
Phase 31 studies, 0 as a primary outcome
Phase 44 studies, 1 as a primary outcome
Not applicable70 studies, 27 as a primary outcome
Observational21 studies, 12 as a primary outcome

Participants per study

Phase 255 median, 34 to 80
Not applicable60 median, 40 to 140
Observational120 median, 78 to 275

Participants per study. The bar spans the middle half of the studies in each phase, the mark is the median, and the axis is logarithmic. Phases with fewer than 10 studies that give a size are left out.

Show as a table

Participants per dementia and Alzheimer's disease study that names the Stroop Color-Word Test, by phase
Phase	Studies with a size	Median	Middle half
Phase 2	13	55	34 to 80
Not applicable	68	60	40 to 140
Observational	20	120	78 to 275

When dementia and Alzheimer's trials measure it

Half of the primary outcomes that name the Stroop Color-Word Test are measured within 9 weeks of the start, and the middle half from 1 week to 7 months. 47 primary outcomes give a duration.

Latest time point of each outcome

Within a day15 outcomes, 10 as a primary outcome
Up to 4 weeks12 outcomes, 6 as a primary outcome
1 to 3 months27 outcomes, 12 as a primary outcome
3 to 6 months21 outcomes, 7 as a primary outcome
6 to 12 months22 outcomes, 5 as a primary outcome
1 to 2 years8 outcomes, 3 as a primary outcome
Over 2 years6 outcomes, 4 as a primary outcome
No duration given5 outcomes, 2 as a primary outcome

A test as a primary outcomeOnly in secondary or other outcomes

111 of the 116 outcome measures give a duration. A single visit counts as within a day.

Status, results, interventions and countries

Status

Recruiting17 studies, 5 as a primary outcome
Not yet recruiting7 studies, 3 as a primary outcome
Active, not recruiting4 studies, 2 as a primary outcome
Completed55 studies, 26 as a primary outcome
Stopped early6 studies, 3 as a primary outcome
Status unknown27 studies, 10 as a primary outcome

What they test

Behavioral39 studies, 19 as a primary outcome
Drug18 studies, 7 as a primary outcome
Device26 studies, 9 as a primary outcome
Dietary supplement7 studies, 2 as a primary outcome
Procedure4 studies, 0 as a primary outcome
Diagnostic test5 studies, 2 as a primary outcome
Radiation1 studies, 0 as a primary outcome
Combination product1 studies, 1 as a primary outcome
Other27 studies, 9 as a primary outcome
None given10 studies, 7 as a primary outcome

Intervention types as registered. A study can list several; observational studies often list none.

35 countries in all. A study with sites in several counts in each; 6 list no site.

Reported results

Completed studies with results posted on ClinicalTrials.gov, a results paper the registry links to the study, or both.

Completed dementia and Alzheimer's disease studies that name the Stroop Color-Word Test: 30 of 55, 55%

Every completed study with a cognitive outcome: 3,626 of 7,953, 46%

Completed dementia and Alzheimer's disease studies that name the Stroop Color-Word Test and every completed study, by how they reported results
Results	Completed dementia and Alzheimer's disease studies that name the Stroop Color-Word Test	Every completed study
Results on ClinicalTrials.gov and a paper	10, 18%	776, 10%
Results on ClinicalTrials.gov only	7, 13%	1,139, 14%
A results paper only	13, 24%	1,711, 22%
Neither	25, 45%	4,327, 54%

The 116 studies

Filter by phase, sponsor, status, country, intervention, outcome list, size and start year. Each study links to its record on ClinicalTrials.gov.

116 studies match. 49 name the Stroop Color-Word Test in a primary outcome. Median size 68 participants. Median time to the primary outcome: 9 weeks.

Loading 116 studies; the filters turn on when they arrive.

By start year

2026 is partly planned starts.

Show as a table

Matching studies by start year
Start year	Studies	As a primary outcome
2000	0	0
2001	1	1
2002	0	0
2003	0	0
2004	2	1
2005	2	1
2006	1	1
2007	0	0
2008	0	0
2009	1	0
2010	5	2
2011	4	1
2012	3	2
2013	0	0
2014	3	0
2015	4	2
2016	7	1
2017	6	2
2018	7	3
2019	9	6
2020	6	3
2021	9	4
2022	10	6
2023	7	3
2024	9	4
2025	10	4
2026	10	2

Library tests named most

Largest condition groups

Dementia and Alzheimer's116 studies, 49 as a primary outcome
Mild cognitive impairment31 studies, 12 as a primary outcome
Aging, frailty and exercise9 studies, 5 as a primary outcome
Parkinson's disease7 studies, 2 as a primary outcome
Cancer3 studies, 1 as a primary outcome
Healthy volunteers3 studies, 2 as a primary outcome
Obesity and diabetes3 studies, 1 as a primary outcome
Sleep and sleep disorders3 studies, 2 as a primary outcome
Epilepsy2 studies, 2 as a primary outcome
Stroke1 study, 0 as a primary outcome
Brain injury and concussion1 study, 1 as a primary outcome
Multiple sclerosis1 study, 0 as a primary outcome

Phases

Participants

Lead sponsor: industry 4, other 112. Interventional 95, observational 21.

As a primary outcomeSecondary or other outcomeThe Stroop Color-Word Test

The studies, newest registration first

Each number opens the study's record on ClinicalTrials.gov.

Registered studies that match the filters, newest registration first, with the library tests each one names and the outcome list that names them.
Study	Start	Phase	Conditions	Participants	Lead sponsor	Status	Library tests named, with the latest time point
NCT07882251	Start2021	PhaseNot applicable	ConditionsDementia and Alzheimer's	Participants80	Lead sponsorOther	StatusCompleted	Library tests named Stroop Color-Word TestPrimary5 weeks Verbal LearningPrimary5 weeks Digit Span TestPrimary5 weeks Category FluencyPrimary5 weeks Complex Figure Copy and RecallPrimary5 weeks Corsi Block-Tapping TestPrimary5 weeks Line Angle MatchingPrimary5 weeks
NCT07731334	Start2026	PhaseNot applicable	ConditionsDementia and Alzheimer's, Mild cognitive impairment	Participants384	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestSecondary12 months Stroop Color-Word TestSecondary12 months Verbal LearningSecondary12 months Verbal FluencySecondary12 months Digit Span TestSecondary12 months Complex Figure Copy and RecallSecondary12 months Corsi Block-Tapping TestSecondary12 months Oddball Target DetectionSecondary
NCT07730671	Start2026	PhaseObservational	ConditionsDementia and Alzheimer's	Participants121	Lead sponsorOther	StatusNot yet recruiting	Library tests named Stroop Color-Word TestPrimary5 years Short Story RecallPrimary5 years Selective Reminding TaskPrimary5 years
NCT07692542	Start2026	PhaseNot applicable	ConditionsDementia and Alzheimer's	Participants40	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestSecondary2 weeks Stroop Color-Word TestSecondary2 weeks
NCT07664865	Start2024	PhaseObservational	ConditionsDementia and Alzheimer's	Participants250	Lead sponsorOther	StatusCompleted	Library tests named Stroop Color-Word TestPrimarysame day Verbal FluencyPrimarysame day Symbol CodingPrimarysame day Picture Naming TestPrimarysame day Clock Drawing TaskPrimarysame day Complex Figure Copy and RecallPrimarysame day Emoji Emotion RecognitionPrimarysame day Selective Reminding TaskPrimarysame day
NCT07646054	Start2026	PhaseNot applicable	ConditionsDementia and Alzheimer's, Mild cognitive impairment	Participants1,200	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestSecondary12 months Stroop Color-Word TestSecondary12 months
NCT07533084	Start2026	PhaseObservational	ConditionsDementia and Alzheimer's, Mild cognitive impairment, Aging, frailty and exercise	Participants265	Lead sponsorOther	StatusNot yet recruiting	Library tests named Stroop Color-Word TestSecondary Verbal LearningSecondary Short Story RecallSecondary
NCT07399418	Start2025	PhaseObservational	ConditionsDementia and Alzheimer's	Participants80	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestPrimarysame day Stroop Color-Word TestPrimarysame day Verbal FluencyPrimarysame day Digit Span TestPrimarysame day Go/No-Go TaskPrimarysame day Category FluencyPrimarysame day Clock Drawing TaskPrimarysame day Complex Figure Copy and RecallPrimarysame day Matrix ReasoningPrimarysame day Selective Reminding TaskPrimarysame day
NCT07376135	Start2026	PhaseNot applicable	ConditionsDementia and Alzheimer's, Mild cognitive impairment	Participants300	Lead sponsorOther	StatusNot yet recruiting	Library tests named Trail Making TestOther outcome18 months Stroop Color-Word TestOther outcome18 months Verbal LearningOther outcome18 months Digit Span TestOther outcome18 months Symbol CodingOther outcome18 months Short Story RecallOther outcome18 months Complex Figure Copy and RecallOther outcome18 months
NCT07364019	Start2026	PhaseNot applicable	ConditionsDementia and Alzheimer's, Mild cognitive impairment	Participants700	Lead sponsorOther	StatusRecruiting	Library tests named Stroop Color-Word TestSecondary6 months Face-name Memory TaskSecondary6 months
NCT07163039	Start2025	PhaseNot applicable	ConditionsDementia and Alzheimer's	Participants60	Lead sponsorOther	StatusNot yet recruiting	Library tests named Trail Making TestPrimary8 weeks Stroop Color-Word TestPrimary8 weeks Symbol CodingSecondary8 weeks Cancellation TestPrimary8 weeks
NCT07149038	Start2025	PhaseNot applicable	ConditionsDementia and Alzheimer's, Mild cognitive impairment	Participants24	Lead sponsorIndustry	StatusActive, not recruiting	Library tests named Trail Making TestPrimary8 weeks Stroop Color-Word TestPrimary8 weeks Verbal FluencyPrimary8 weeks Task Switching TestPrimary8 weeks
NCT07138677	Start2025	PhaseNot applicable	ConditionsDementia and Alzheimer's	Participants40	Lead sponsorOther	StatusCompleted	Library tests named Stroop Color-Word TestSecondary2 weeks Short Story RecallSecondary2 weeks Line Angle MatchingSecondary2 weeks
NCT07089303	Start2025	PhaseObservational	ConditionsDementia and Alzheimer's, Mild cognitive impairment	Participants750	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestSecondary12 months Stroop Color-Word TestSecondary12 months Verbal LearningSecondary12 months Digit Span TestSecondary12 months Symbol CodingSecondary12 months Picture Naming TestSecondary12 months Clock Drawing TaskSecondary12 months Complex Figure Copy and RecallSecondary12 months
NCT07036328	Start2025	PhaseNot applicable	ConditionsDementia and Alzheimer's	Participants55	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestSecondary6 months Stroop Color-Word TestSecondary6 months Verbal LearningSecondary6 months Verbal FluencySecondary6 months Digit Span TestSecondary6 months Category FluencySecondary6 months Task Switching TestSecondary6 months
NCT07033481	Start2025	PhasePhase 2	ConditionsDementia and Alzheimer's	Participants20	Lead sponsorIndustry	StatusActive, not recruiting	Library tests named Stroop Color-Word TestOther outcome8 months Verbal FluencyOther outcome8 months Category FluencyOther outcome8 months
NCT07033468	Start2024	PhaseNot applicable	ConditionsDementia and Alzheimer's	Participants60	Lead sponsorOther	StatusRecruiting	Library tests named Stroop Color-Word TestPrimary Verbal FluencyPrimary Go/No-Go TaskPrimary
NCT07025070	Start2024	PhaseObservational	ConditionsDementia and Alzheimer's, Aging, frailty and exercise	Participants60	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestPrimarysame day Stroop Color-Word TestPrimarysame day Verbal FluencyPrimarysame day Digit Span TestPrimarysame day
NCT06875739	Start2025	PhaseObservational	ConditionsDementia and Alzheimer's, Parkinson's disease	Participants310	Lead sponsorOther	StatusStatus unknown	Library tests named Trail Making TestPrimarysame day Stroop Color-Word TestPrimarysame day Complex Figure Copy and RecallPrimarysame day
NCT06869135	Start2025	PhaseObservational	ConditionsDementia and Alzheimer's, Mild cognitive impairment, Parkinson's disease	Participants242	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestSecondary12 months Stroop Color-Word TestSecondary12 months Complex Figure Copy and RecallSecondary12 months
NCT06797817	Start2026	PhasePhase 3	ConditionsDementia and Alzheimer's	Participants156	Lead sponsorOther	StatusNot yet recruiting	Library tests named Stroop Color-Word TestSecondary6 months N-Back TaskSecondary6 months Go/No-Go TaskSecondary6 months Continuous Performance TestSecondary6 months
NCT06734546	Start2024	PhaseNot applicable	ConditionsDementia and Alzheimer's, Obesity and diabetes	Participants75	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestSecondary6 months Stroop Color-Word TestSecondary6 months Verbal LearningSecondary6 months
NCT06668610	Start2024	PhaseNot applicable	ConditionsDementia and Alzheimer's, Mild cognitive impairment	Participants50	Lead sponsorOther	StatusRecruiting	Library tests named Stroop Color-Word TestPrimary8 weeks Selective Reminding TaskPrimary8 weeks
NCT06595511	Start2022	PhaseNot applicable	ConditionsDementia and Alzheimer's	Participants30	Lead sponsorOther	StatusStatus unknown	Library tests named Trail Making TestSecondary13 weeks Stroop Color-Word TestSecondary13 weeks Verbal FluencySecondary13 weeks Digit Span TestSecondary13 weeks Picture Naming TestSecondary13 weeks Clock Drawing TaskSecondary13 weeks Line Angle MatchingSecondary13 weeks
NCT06588946	Start2025	PhasePhase 2	ConditionsDementia and Alzheimer's	Participants48	Lead sponsorOther	StatusNot yet recruiting	Library tests named Stroop Color-Word TestSecondary2 weeks

Questions, answered from the data

How many dementia and Alzheimer's trials use the Stroop Color-Word Test?

116 registered dementia and Alzheimer's disease studies on ClinicalTrials.gov name it in an outcome measure, 49 of them in a primary outcome: 7% of the condition's 1,673 studies with a cognitive outcome, against 12% of all of them. It is the 7th most named test in dementia and Alzheimer's trials.

Which tests do dementia and Alzheimer's trials use with the Stroop Color-Word Test?

The Trail Making Test (63 studies), Verbal Fluency (40 studies) and the Digit Span Test (39 studies).

How many participants do phase 2 dementia and Alzheimer's trials that use the Stroop Color-Word Test enroll?

Half of the phase 2 studies that name it enroll 55 participants or fewer, and the middle half enroll 34 to 80. 13 of them give a size.

When do dementia and Alzheimer's trials measure the Stroop Color-Word Test?

Half of the primary outcomes that name the Stroop Color-Word Test are measured within 9 weeks of the start, and the middle half from 1 week to 7 months. 47 primary outcomes give a duration.

How many completed dementia and Alzheimer's trials that use the Stroop Color-Word Test have reported results?

30 of the 55 completed studies that name it, 55%, have reported results: 17 posted them on ClinicalTrials.gov, 23 have a results paper linked to the registry record, and 10 did both. The other 25 show neither. Of all completed studies with a cognitive outcome, 46% have reported results.

How the studies are counted

For each test family, the census runs ClinicalTrials.gov's own outcome search for the family's names and reads every study first posted by the day the family was counted. These studies were read on 10 November 2026. A study counts once on a page, however many tests it names. Counts for a test cover every version of the task under any of its names, so a page can count studies that used a commercial version.

The census adds two things to each record and changes nothing in it: which outcome list names the test (primary, then secondary, then other), and the condition groups, matched on the study's condition names and MeSH terms. A study can fall in several groups; one whose only condition is cognitive impairment or decline falls in “Cognitive impairment and decline”. Studies that name only instruments outside the library count in every total and share but are not listed.

A second read on 10 November 2026 added each study's overall status, whether results are posted, its intervention types, the countries of its sites and the time frame of the outcome that names each test. A time frame counts by the latest time point it names: “Baseline, 12 and 24 weeks” is 24 weeks, a single visit is within a day, and one that names no duration, such as “end of treatment”, is left out of the timings.

A third read on 10 November 2026 added the papers the registry links to each study: those its sponsor lists as reporting results, and those PubMed links to it through the study's NCT number. A study has a results paper when one of them came out in or after the month of its primary completion and PubMed does not class it as a protocol, review or comment. A paper that never gives the NCT number is not linked, so some studies counted as reporting neither did publish.

Source: ClinicalTrials.gov, a database of the U.S. National Library of Medicine, which does not endorse these pages. Every study line is in the data release 2.1.0, and the explorer's own file is clinical-trials-studies.json.

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Clinical trials data

Stroop Color-Word Test in dementia and Alzheimer's trials: 116 registered studies

Registered dementia and Alzheimer's disease studies name it in an outcome measure: 116
Name it in a primary outcome, 42%: 49 of 116
Of the condition's 1,673 studies name it, against 12% of all registered studies: 7%; Other conditions
Median participants per study: 68; By phase

Try the Stroop Color-Word Test

Tests named in the same studies

The library tests that dementia and Alzheimer's disease studies naming the Stroop Color-Word Test name most often beside it.

1
Trail Making Test63 studies, 24 as a primary outcome
2
Verbal Fluency40 studies, 20 as a primary outcome
3
Digit Span Test39 studies, 13 as a primary outcome
4
Verbal Learning32 studies, 18 as a primary outcome
5
Symbol Coding23 studies, 10 as a primary outcome
6
Category Fluency19 studies, 8 as a primary outcome
7
Short Story Recall19 studies, 7 as a primary outcome
8
Complex Figure Copy and Recall18 studies, 10 as a primary outcome
9
Selective Reminding Task14 studies, 7 as a primary outcome
10
Picture Naming Test13 studies, 7 as a primary outcome

A test as a primary outcomeOnly in secondary or other outcomes

Studies by start year

Each study counted once. 2026 is partly planned starts.

A test as a primary outcomeOnly in secondary or other outcomes

Show as a table

Registered studies by start year
Start year	Studies	A test as a primary outcome
2000	0	0
2001	1	1
2002	0	0
2003	0	0
2004	2	1
2005	2	1
2006	1	1
2007	0	0
2008	0	0
2009	1	0
2010	5	2
2011	4	1
2012	3	2
2013	0	0
2014	3	0
2015	4	2
2016	7	1
2017	6	2
2018	7	3
2019	9	6
2020	6	3
2021	9	4
2022	10	6
2023	7	3
2024	9	4
2025	10	4
2026	10	2

Phases and study sizes

By phase

Early phase 12 studies, 2 as a primary outcome
Phase 1/23 studies, 2 as a primary outcome
Phase 213 studies, 4 as a primary outcome
Phase 2/32 studies, 1 as a primary outcome
Phase 31 studies, 0 as a primary outcome
Phase 44 studies, 1 as a primary outcome
Not applicable70 studies, 27 as a primary outcome
Observational21 studies, 12 as a primary outcome

Participants per study

Phase 255 median, 34 to 80
Not applicable60 median, 40 to 140
Observational120 median, 78 to 275

Show as a table

Participants per dementia and Alzheimer's disease study that names the Stroop Color-Word Test, by phase
Phase	Studies with a size	Median	Middle half
Phase 2	13	55	34 to 80
Not applicable	68	60	40 to 140
Observational	20	120	78 to 275

When dementia and Alzheimer's trials measure it

Half of the primary outcomes that name the Stroop Color-Word Test are measured within 9 weeks of the start, and the middle half from 1 week to 7 months. 47 primary outcomes give a duration.

Latest time point of each outcome

Within a day15 outcomes, 10 as a primary outcome
Up to 4 weeks12 outcomes, 6 as a primary outcome
1 to 3 months27 outcomes, 12 as a primary outcome
3 to 6 months21 outcomes, 7 as a primary outcome
6 to 12 months22 outcomes, 5 as a primary outcome
1 to 2 years8 outcomes, 3 as a primary outcome
Over 2 years6 outcomes, 4 as a primary outcome
No duration given5 outcomes, 2 as a primary outcome

A test as a primary outcomeOnly in secondary or other outcomes

111 of the 116 outcome measures give a duration. A single visit counts as within a day.

Status, results, interventions and countries

Status

Recruiting17 studies, 5 as a primary outcome
Not yet recruiting7 studies, 3 as a primary outcome
Active, not recruiting4 studies, 2 as a primary outcome
Completed55 studies, 26 as a primary outcome
Stopped early6 studies, 3 as a primary outcome
Status unknown27 studies, 10 as a primary outcome

What they test

Behavioral39 studies, 19 as a primary outcome
Drug18 studies, 7 as a primary outcome
Device26 studies, 9 as a primary outcome
Dietary supplement7 studies, 2 as a primary outcome
Procedure4 studies, 0 as a primary outcome
Diagnostic test5 studies, 2 as a primary outcome
Radiation1 studies, 0 as a primary outcome
Combination product1 studies, 1 as a primary outcome
Other27 studies, 9 as a primary outcome
None given10 studies, 7 as a primary outcome

Intervention types as registered. A study can list several; observational studies often list none.

35 countries in all. A study with sites in several counts in each; 6 list no site.

Reported results

Completed studies with results posted on ClinicalTrials.gov, a results paper the registry links to the study, or both.

Completed dementia and Alzheimer's disease studies that name the Stroop Color-Word Test: 30 of 55, 55%

Every completed study with a cognitive outcome: 3,626 of 7,953, 46%

Completed dementia and Alzheimer's disease studies that name the Stroop Color-Word Test and every completed study, by how they reported results
Results	Completed dementia and Alzheimer's disease studies that name the Stroop Color-Word Test	Every completed study
Results on ClinicalTrials.gov and a paper	10, 18%	776, 10%
Results on ClinicalTrials.gov only	7, 13%	1,139, 14%
A results paper only	13, 24%	1,711, 22%
Neither	25, 45%	4,327, 54%

The 116 studies

Filter by phase, sponsor, status, country, intervention, outcome list, size and start year. Each study links to its record on ClinicalTrials.gov.

116 studies match. 49 name the Stroop Color-Word Test in a primary outcome. Median size 68 participants. Median time to the primary outcome: 9 weeks.

Loading 116 studies; the filters turn on when they arrive.

By start year

2026 is partly planned starts.

Show as a table

Matching studies by start year
Start year	Studies	As a primary outcome
2000	0	0
2001	1	1
2002	0	0
2003	0	0
2004	2	1
2005	2	1
2006	1	1
2007	0	0
2008	0	0
2009	1	0
2010	5	2
2011	4	1
2012	3	2
2013	0	0
2014	3	0
2015	4	2
2016	7	1
2017	6	2
2018	7	3
2019	9	6
2020	6	3
2021	9	4
2022	10	6
2023	7	3
2024	9	4
2025	10	4
2026	10	2

Library tests named most

Largest condition groups

Dementia and Alzheimer's116 studies, 49 as a primary outcome
Mild cognitive impairment31 studies, 12 as a primary outcome
Aging, frailty and exercise9 studies, 5 as a primary outcome
Parkinson's disease7 studies, 2 as a primary outcome
Cancer3 studies, 1 as a primary outcome
Healthy volunteers3 studies, 2 as a primary outcome
Obesity and diabetes3 studies, 1 as a primary outcome
Sleep and sleep disorders3 studies, 2 as a primary outcome
Epilepsy2 studies, 2 as a primary outcome
Stroke1 study, 0 as a primary outcome
Brain injury and concussion1 study, 1 as a primary outcome
Multiple sclerosis1 study, 0 as a primary outcome

Phases

Participants

Lead sponsor: industry 4, other 112. Interventional 95, observational 21.

As a primary outcomeSecondary or other outcomeThe Stroop Color-Word Test

The studies, newest registration first

Each number opens the study's record on ClinicalTrials.gov.

Registered studies that match the filters, newest registration first, with the library tests each one names and the outcome list that names them.
Study	Start	Phase	Conditions	Participants	Lead sponsor	Status	Library tests named, with the latest time point
NCT07882251	Start2021	PhaseNot applicable	ConditionsDementia and Alzheimer's	Participants80	Lead sponsorOther	StatusCompleted	Library tests named Stroop Color-Word TestPrimary5 weeks Verbal LearningPrimary5 weeks Digit Span TestPrimary5 weeks Category FluencyPrimary5 weeks Complex Figure Copy and RecallPrimary5 weeks Corsi Block-Tapping TestPrimary5 weeks Line Angle MatchingPrimary5 weeks
NCT07731334	Start2026	PhaseNot applicable	ConditionsDementia and Alzheimer's, Mild cognitive impairment	Participants384	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestSecondary12 months Stroop Color-Word TestSecondary12 months Verbal LearningSecondary12 months Verbal FluencySecondary12 months Digit Span TestSecondary12 months Complex Figure Copy and RecallSecondary12 months Corsi Block-Tapping TestSecondary12 months Oddball Target DetectionSecondary
NCT07730671	Start2026	PhaseObservational	ConditionsDementia and Alzheimer's	Participants121	Lead sponsorOther	StatusNot yet recruiting	Library tests named Stroop Color-Word TestPrimary5 years Short Story RecallPrimary5 years Selective Reminding TaskPrimary5 years
NCT07692542	Start2026	PhaseNot applicable	ConditionsDementia and Alzheimer's	Participants40	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestSecondary2 weeks Stroop Color-Word TestSecondary2 weeks
NCT07664865	Start2024	PhaseObservational	ConditionsDementia and Alzheimer's	Participants250	Lead sponsorOther	StatusCompleted	Library tests named Stroop Color-Word TestPrimarysame day Verbal FluencyPrimarysame day Symbol CodingPrimarysame day Picture Naming TestPrimarysame day Clock Drawing TaskPrimarysame day Complex Figure Copy and RecallPrimarysame day Emoji Emotion RecognitionPrimarysame day Selective Reminding TaskPrimarysame day
NCT07646054	Start2026	PhaseNot applicable	ConditionsDementia and Alzheimer's, Mild cognitive impairment	Participants1,200	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestSecondary12 months Stroop Color-Word TestSecondary12 months
NCT07533084	Start2026	PhaseObservational	ConditionsDementia and Alzheimer's, Mild cognitive impairment, Aging, frailty and exercise	Participants265	Lead sponsorOther	StatusNot yet recruiting	Library tests named Stroop Color-Word TestSecondary Verbal LearningSecondary Short Story RecallSecondary
NCT07399418	Start2025	PhaseObservational	ConditionsDementia and Alzheimer's	Participants80	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestPrimarysame day Stroop Color-Word TestPrimarysame day Verbal FluencyPrimarysame day Digit Span TestPrimarysame day Go/No-Go TaskPrimarysame day Category FluencyPrimarysame day Clock Drawing TaskPrimarysame day Complex Figure Copy and RecallPrimarysame day Matrix ReasoningPrimarysame day Selective Reminding TaskPrimarysame day
NCT07376135	Start2026	PhaseNot applicable	ConditionsDementia and Alzheimer's, Mild cognitive impairment	Participants300	Lead sponsorOther	StatusNot yet recruiting	Library tests named Trail Making TestOther outcome18 months Stroop Color-Word TestOther outcome18 months Verbal LearningOther outcome18 months Digit Span TestOther outcome18 months Symbol CodingOther outcome18 months Short Story RecallOther outcome18 months Complex Figure Copy and RecallOther outcome18 months
NCT07364019	Start2026	PhaseNot applicable	ConditionsDementia and Alzheimer's, Mild cognitive impairment	Participants700	Lead sponsorOther	StatusRecruiting	Library tests named Stroop Color-Word TestSecondary6 months Face-name Memory TaskSecondary6 months
NCT07163039	Start2025	PhaseNot applicable	ConditionsDementia and Alzheimer's	Participants60	Lead sponsorOther	StatusNot yet recruiting	Library tests named Trail Making TestPrimary8 weeks Stroop Color-Word TestPrimary8 weeks Symbol CodingSecondary8 weeks Cancellation TestPrimary8 weeks
NCT07149038	Start2025	PhaseNot applicable	ConditionsDementia and Alzheimer's, Mild cognitive impairment	Participants24	Lead sponsorIndustry	StatusActive, not recruiting	Library tests named Trail Making TestPrimary8 weeks Stroop Color-Word TestPrimary8 weeks Verbal FluencyPrimary8 weeks Task Switching TestPrimary8 weeks
NCT07138677	Start2025	PhaseNot applicable	ConditionsDementia and Alzheimer's	Participants40	Lead sponsorOther	StatusCompleted	Library tests named Stroop Color-Word TestSecondary2 weeks Short Story RecallSecondary2 weeks Line Angle MatchingSecondary2 weeks
NCT07089303	Start2025	PhaseObservational	ConditionsDementia and Alzheimer's, Mild cognitive impairment	Participants750	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestSecondary12 months Stroop Color-Word TestSecondary12 months Verbal LearningSecondary12 months Digit Span TestSecondary12 months Symbol CodingSecondary12 months Picture Naming TestSecondary12 months Clock Drawing TaskSecondary12 months Complex Figure Copy and RecallSecondary12 months
NCT07036328	Start2025	PhaseNot applicable	ConditionsDementia and Alzheimer's	Participants55	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestSecondary6 months Stroop Color-Word TestSecondary6 months Verbal LearningSecondary6 months Verbal FluencySecondary6 months Digit Span TestSecondary6 months Category FluencySecondary6 months Task Switching TestSecondary6 months
NCT07033481	Start2025	PhasePhase 2	ConditionsDementia and Alzheimer's	Participants20	Lead sponsorIndustry	StatusActive, not recruiting	Library tests named Stroop Color-Word TestOther outcome8 months Verbal FluencyOther outcome8 months Category FluencyOther outcome8 months
NCT07033468	Start2024	PhaseNot applicable	ConditionsDementia and Alzheimer's	Participants60	Lead sponsorOther	StatusRecruiting	Library tests named Stroop Color-Word TestPrimary Verbal FluencyPrimary Go/No-Go TaskPrimary
NCT07025070	Start2024	PhaseObservational	ConditionsDementia and Alzheimer's, Aging, frailty and exercise	Participants60	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestPrimarysame day Stroop Color-Word TestPrimarysame day Verbal FluencyPrimarysame day Digit Span TestPrimarysame day
NCT06875739	Start2025	PhaseObservational	ConditionsDementia and Alzheimer's, Parkinson's disease	Participants310	Lead sponsorOther	StatusStatus unknown	Library tests named Trail Making TestPrimarysame day Stroop Color-Word TestPrimarysame day Complex Figure Copy and RecallPrimarysame day
NCT06869135	Start2025	PhaseObservational	ConditionsDementia and Alzheimer's, Mild cognitive impairment, Parkinson's disease	Participants242	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestSecondary12 months Stroop Color-Word TestSecondary12 months Complex Figure Copy and RecallSecondary12 months
NCT06797817	Start2026	PhasePhase 3	ConditionsDementia and Alzheimer's	Participants156	Lead sponsorOther	StatusNot yet recruiting	Library tests named Stroop Color-Word TestSecondary6 months N-Back TaskSecondary6 months Go/No-Go TaskSecondary6 months Continuous Performance TestSecondary6 months
NCT06734546	Start2024	PhaseNot applicable	ConditionsDementia and Alzheimer's, Obesity and diabetes	Participants75	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestSecondary6 months Stroop Color-Word TestSecondary6 months Verbal LearningSecondary6 months
NCT06668610	Start2024	PhaseNot applicable	ConditionsDementia and Alzheimer's, Mild cognitive impairment	Participants50	Lead sponsorOther	StatusRecruiting	Library tests named Stroop Color-Word TestPrimary8 weeks Selective Reminding TaskPrimary8 weeks
NCT06595511	Start2022	PhaseNot applicable	ConditionsDementia and Alzheimer's	Participants30	Lead sponsorOther	StatusStatus unknown	Library tests named Trail Making TestSecondary13 weeks Stroop Color-Word TestSecondary13 weeks Verbal FluencySecondary13 weeks Digit Span TestSecondary13 weeks Picture Naming TestSecondary13 weeks Clock Drawing TaskSecondary13 weeks Line Angle MatchingSecondary13 weeks
NCT06588946	Start2025	PhasePhase 2	ConditionsDementia and Alzheimer's	Participants48	Lead sponsorOther	StatusNot yet recruiting	Library tests named Stroop Color-Word TestSecondary2 weeks

Questions, answered from the data

How many dementia and Alzheimer's trials use the Stroop Color-Word Test?

Which tests do dementia and Alzheimer's trials use with the Stroop Color-Word Test?

The Trail Making Test (63 studies), Verbal Fluency (40 studies) and the Digit Span Test (39 studies).

How many participants do phase 2 dementia and Alzheimer's trials that use the Stroop Color-Word Test enroll?

Half of the phase 2 studies that name it enroll 55 participants or fewer, and the middle half enroll 34 to 80. 13 of them give a size.

When do dementia and Alzheimer's trials measure the Stroop Color-Word Test?

Half of the primary outcomes that name the Stroop Color-Word Test are measured within 9 weeks of the start, and the middle half from 1 week to 7 months. 47 primary outcomes give a duration.

How many completed dementia and Alzheimer's trials that use the Stroop Color-Word Test have reported results?

How the studies are counted

Run the Stroop Color-Word Test in your trial

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Stroop Color-Word Test in dementia and Alzheimer's trials: 116 registered studies

Tests named in the same studies

Studies by start year

Phases and study sizes

By phase

Participants per study

When dementia and Alzheimer's trials measure it

Latest time point of each outcome

Status, results, interventions and countries

Status

What they test

Where their sites are

Reported results

The 116 studies

Library tests named most

Largest condition groups

Phases

Participants

The studies, newest registration first

Questions, answered from the data

How many dementia and Alzheimer's trials use the Stroop Color-Word Test?

Which tests do dementia and Alzheimer's trials use with the Stroop Color-Word Test?

How many participants do phase 2 dementia and Alzheimer's trials that use the Stroop Color-Word Test enroll?

When do dementia and Alzheimer's trials measure the Stroop Color-Word Test?

How many completed dementia and Alzheimer's trials that use the Stroop Color-Word Test have reported results?

More on the Stroop Color-Word Test and dementia and Alzheimer's disease

The Stroop Color-Word Test in other conditions

Other tests in dementia and Alzheimer's trials

How the studies are counted

Run the Stroop Color-Word Test in your trial

Stroop Color-Word Test in dementia and Alzheimer's trials: 116 registered studies

Tests named in the same studies

Studies by start year

Phases and study sizes

By phase

Participants per study

When dementia and Alzheimer's trials measure it

Latest time point of each outcome

Status, results, interventions and countries

Status

What they test

Where their sites are

Reported results

The 116 studies

Library tests named most

Largest condition groups

Phases

Participants

The studies, newest registration first

Questions, answered from the data

How many dementia and Alzheimer's trials use the Stroop Color-Word Test?

Which tests do dementia and Alzheimer's trials use with the Stroop Color-Word Test?

How many participants do phase 2 dementia and Alzheimer's trials that use the Stroop Color-Word Test enroll?

When do dementia and Alzheimer's trials measure the Stroop Color-Word Test?

How many completed dementia and Alzheimer's trials that use the Stroop Color-Word Test have reported results?

More on the Stroop Color-Word Test and dementia and Alzheimer's disease

The Stroop Color-Word Test in other conditions

Other tests in dementia and Alzheimer's trials

How the studies are counted

Run the Stroop Color-Word Test in your trial