Clinical trials data

Stroop Color-Word Test in sleep trials: 89 registered studies

Every registered sleep and sleep disorders 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 sleep and sleep disorders studies name it in an outcome measure: 89
Name it in a primary outcome, 39%: 35 of 89
Of the condition's 749 studies name it, against 12% of all registered studies: 12%; Other conditions
Median participants per study: 65; By phase

Try the Stroop Color-Word Test

Tests named in the same studies

The library tests that sleep and sleep disorders studies naming the Stroop Color-Word Test name most often beside it.

1
Trail Making Test34 studies, 11 as a primary outcome
2
Digit Span Test23 studies, 10 as a primary outcome
3
Verbal Fluency17 studies, 5 as a primary outcome
4
Verbal Learning16 studies, 8 as a primary outcome
5
Psychomotor Vigilance Task15 studies, 6 as a primary outcome
6
Symbol Coding10 studies, 3 as a primary outcome
7
Continuous Performance Test8 studies, 5 as a primary outcome
8
Paced Visual Serial Addition Test6 studies, 3 as a primary outcome
9
Card Sorting Test (Berg)6 studies, 2 as a primary outcome
10
Category Fluency6 studies, 2 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	0	0
2002	0	0
2003	0	0
2004	1	0
2005	0	0
2006	1	0
2007	1	0
2008	0	0
2009	0	0
2010	1	0
2011	0	0
2012	2	1
2013	2	0
2014	2	0
2015	1	1
2016	2	1
2017	1	1
2018	0	0
2019	4	1
2020	5	2
2021	5	3
2022	11	4
2023	11	3
2024	12	6
2025	11	4
2026	16	8

Phases and study sizes

By phase

Early phase 11 studies, 1 as a primary outcome
Phase 11 studies, 0 as a primary outcome
Phase 1/21 studies, 1 as a primary outcome
Phase 23 studies, 1 as a primary outcome
Phase 43 studies, 0 as a primary outcome
Not applicable55 studies, 19 as a primary outcome
Observational25 studies, 13 as a primary outcome

Participants per study

Not applicable54 median, 34 to 100
Observational86 median, 30 to 180

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 sleep and sleep disorders study that names the Stroop Color-Word Test, by phase
Phase	Studies with a size	Median	Middle half
Not applicable	55	54	34 to 100
Observational	25	86	30 to 180

When sleep trials measure it

Half of the primary outcomes that name the Stroop Color-Word Test are measured within 8 weeks of the start, and the middle half from 1 week to 4 months. 32 primary outcomes give a duration.

Latest time point of each outcome

Within a day12 outcomes, 6 as a primary outcome
Up to 4 weeks17 outcomes, 6 as a primary outcome
1 to 3 months29 outcomes, 12 as a primary outcome
3 to 6 months11 outcomes, 2 as a primary outcome
6 to 12 months5 outcomes, 1 as a primary outcome
1 to 2 years2 outcomes, 1 as a primary outcome
Over 2 years5 outcomes, 4 as a primary outcome
No duration given8 outcomes, 3 as a primary outcome

A test as a primary outcomeOnly in secondary or other outcomes

81 of the 89 outcome measures give a duration. A single visit counts as within a day.

Status, results, interventions and countries

Status

Recruiting28 studies, 14 as a primary outcome
Not yet recruiting8 studies, 4 as a primary outcome
Active, not recruiting1 studies, 0 as a primary outcome
Completed35 studies, 12 as a primary outcome
Stopped early3 studies, 0 as a primary outcome
Status unknown14 studies, 5 as a primary outcome

What they test

Behavioral22 studies, 7 as a primary outcome
Drug10 studies, 3 as a primary outcome
Device26 studies, 8 as a primary outcome
Dietary supplement8 studies, 2 as a primary outcome
Procedure1 studies, 0 as a primary outcome
Diagnostic test2 studies, 1 as a primary outcome
Combination product2 studies, 1 as a primary outcome
Other23 studies, 11 as a primary outcome
None given10 studies, 6 as a primary outcome

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

26 countries in all. A study with sites in several counts in each; 3 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 sleep and sleep disorders studies that name the Stroop Color-Word Test: 14 of 35, 40%

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

Completed sleep and sleep disorders studies that name the Stroop Color-Word Test and every completed study, by how they reported results
Results	Completed sleep and sleep disorders studies that name the Stroop Color-Word Test	Every completed study
Results on ClinicalTrials.gov and a paper	3, 9%	776, 10%
Results on ClinicalTrials.gov only	2, 6%	1,139, 14%
A results paper only	9, 26%	1,711, 22%
Neither	21, 60%	4,327, 54%

The 89 studies

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

89 studies match. 35 name the Stroop Color-Word Test in a primary outcome. Median size 65 participants. Median time to the primary outcome: 8 weeks.

Loading 89 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	0	0
2002	0	0
2003	0	0
2004	1	0
2005	0	0
2006	1	0
2007	1	0
2008	0	0
2009	0	0
2010	1	0
2011	0	0
2012	2	1
2013	2	0
2014	2	0
2015	1	1
2016	2	1
2017	1	1
2018	0	0
2019	4	1
2020	5	2
2021	5	3
2022	11	4
2023	11	3
2024	12	6
2025	11	4
2026	16	8

Library tests named most

Largest condition groups

Sleep and sleep disorders89 studies, 35 as a primary outcome
Pain and fatigue15 studies, 6 as a primary outcome
Depression and bipolar disorder8 studies, 3 as a primary outcome
Aging, frailty and exercise6 studies, 1 as a primary outcome
Mild cognitive impairment5 studies, 2 as a primary outcome
Cancer5 studies, 4 as a primary outcome
Anxiety, PTSD and OCD5 studies, 2 as a primary outcome
Cardiovascular disease4 studies, 1 as a primary outcome
Dementia and Alzheimer's3 studies, 2 as a primary outcome
Stroke3 studies, 0 as a primary outcome
Parkinson's disease3 studies, 1 as a primary outcome
Healthy volunteers3 studies, 0 as a primary outcome

Phases

Participants

Lead sponsor: industry 2, other 87. Interventional 64, observational 25.

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
NCT07897474	Start2026	PhaseObservational	ConditionsSleep and sleep disorders	Participants100	Lead sponsorOther	StatusNot yet recruiting	Library tests named Trail Making TestPrimary Stroop Color-Word TestPrimary Digit Span TestPrimary Symbol CodingPrimary Psychomotor Vigilance TaskPrimary
NCT07882433	Start2026	PhaseNot applicable	ConditionsSleep and sleep disorders	Participants50	Lead sponsorOther	StatusNot yet recruiting	Library tests named Trail Making TestSecondary6 months Stroop Color-Word TestSecondary6 months Verbal FluencySecondary6 months Digit Span TestSecondary6 months Paced Visual Serial Addition TestSecondary6 months
NCT07803068	Start2025	PhaseNot applicable	ConditionsSleep and sleep disorders	Participants40	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestSecondary12 weeks Stroop Color-Word TestSecondary12 weeks Grid Pattern Span TaskSecondary12 weeks
NCT07799753	Start2026	PhaseNot applicable	ConditionsSleep and sleep disorders	Participants50	Lead sponsorOther	StatusNot yet recruiting	Library tests named Trail Making TestSecondary4 weeks Stroop Color-Word TestSecondary4 weeks Digit Span TestSecondary4 weeks Symbol CodingSecondary4 weeks
NCT07740967	Start2026	PhaseNot applicable	ConditionsSleep and sleep disorders, Pain and fatigue, Cardiovascular disease	Participants34	Lead sponsorOther	StatusRecruiting	Library tests named Stroop Color-Word TestSecondary8 weeks Digit Span TestSecondary8 weeks Pattern and Letter ComparisonSecondary8 weeks
NCT07735910	Start2026	PhaseNot applicable	ConditionsMild cognitive impairment, Depression and bipolar disorder, Sleep and sleep disorders, Anxiety, PTSD and OCD	Participants60	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestPrimary2 weeks Stroop Color-Word TestPrimary2 weeks Digit Span TestPrimary2 weeks
NCT07729930	Start2026	PhaseNot applicable	ConditionsSleep and sleep disorders, Pain and fatigue, Cardiovascular disease	Participants38	Lead sponsorOther	StatusRecruiting	Library tests named Stroop Color-Word TestPrimary8 weeks Digit Span TestPrimary8 weeks Pattern and Letter ComparisonPrimary8 weeks
NCT07706283	Start2025	PhaseNot applicable	ConditionsHealthy volunteers, Sleep and sleep disorders, Pain and fatigue	Participants81	Lead sponsorOther	StatusCompleted	Library tests named Stroop Color-Word TestSecondary6 weeks Eriksen Flanker TaskPrimary6 weeks Task Switching TestSecondary6 weeks
NCT07665840	Start2025	PhaseNot applicable	ConditionsDepression and bipolar disorder, Sleep and sleep disorders, Anxiety, PTSD and OCD	Participants67	Lead sponsorOther	StatusCompleted	Library tests named Trail Making TestSecondary8 weeks Stroop Color-Word TestSecondary8 weeks
NCT07644611	Start2026	PhaseObservational	ConditionsSleep and sleep disorders, Pain and fatigue	Participants30	Lead sponsorOther	StatusRecruiting	Library tests named Stroop Color-Word TestPrimary
NCT07556432	Start2026	PhaseNot applicable	ConditionsSleep and sleep disorders	Participants120	Lead sponsorOther	StatusNot yet recruiting	Library tests named Trail Making TestSecondary6 months Stroop Color-Word TestSecondary6 months Verbal FluencySecondary6 months Category FluencySecondary6 months Selective Reminding TaskSecondary6 months
NCT07553507	Start2026	PhaseNot applicable	ConditionsAging, frailty and exercise, Sleep and sleep disorders	Participants80	Lead sponsorOther	StatusRecruiting	Library tests named Stroop Color-Word TestSecondary6 months Day-Night TaskSecondary6 months
NCT07536503	Start2026	PhaseObservational	ConditionsMultiple sclerosis, Sleep and sleep disorders	Participants80	Lead sponsorOther	StatusRecruiting	Library tests named Stroop Color-Word TestPrimarysame day
NCT07536490	Start2026	PhaseObservational	ConditionsParkinson's disease, Sleep and sleep disorders	Participants69	Lead sponsorOther	StatusCompleted	Library tests named Stroop Color-Word TestPrimarysame day Clock Drawing TaskPrimarysame day
NCT07495592	Start2026	PhaseNot applicable	ConditionsSleep and sleep disorders, Pain and fatigue	Participants32	Lead sponsorIndustry	StatusCompleted	Library tests named Stroop Color-Word TestSecondarysame day Psychomotor Vigilance TaskPrimarysame day
NCT07480096	Start2024	PhasePhase 2	ConditionsSleep and sleep disorders	Participants82	Lead sponsorOther	StatusCompleted Paper	Library tests named Stroop Color-Word TestSecondary2 weeks
NCT07387783	Start2026	PhaseObservational	ConditionsSleep and sleep disorders	Participants75	Lead sponsorOther	StatusRecruiting	Library tests named Stroop Color-Word TestSecondary
NCT07364318	Start2024	PhaseObservational	ConditionsSleep and sleep disorders	Participants30	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestPrimarysame day Stroop Color-Word TestPrimarysame day Verbal LearningPrimarysame day Verbal FluencyPrimarysame day Digit Span TestPrimarysame day Category FluencyPrimarysame day Task Switching TestPrimarysame day
NCT07355842	Start2026	PhaseNot applicable	ConditionsParkinson's disease, Sleep and sleep disorders	Participants80	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestSecondary18 months Stroop Color-Word TestSecondary18 months Verbal LearningSecondary18 months Verbal FluencySecondary18 months Digit Span TestSecondary18 months Category FluencySecondary18 months Picture Naming TestSecondary18 months Psychomotor Vigilance TaskOther outcome18 months Complex Figure Copy and RecallSecondary18 months Finger Tapping TaskSecondary18 months Sustained Attention to ResponseOther outcome18 months Line Angle MatchingSecondary18 months
NCT07329049	Start2026	PhaseNot applicable	ConditionsSleep and sleep disorders	Participants42	Lead sponsorOther	StatusNot yet recruiting	Library tests named Stroop Color-Word TestPrimary8 weeks Verbal FluencyPrimary8 weeks Digit Span TestPrimary8 weeks
NCT07191119	Start2026	PhaseNot applicable	ConditionsCancer, Sleep and sleep disorders	Participants40	Lead sponsorOther	StatusRecruiting	Library tests named Stroop Color-Word TestPrimary8 weeks Continuous Performance TestPrimary8 weeks
NCT07156708	Start2025	PhaseNot applicable	ConditionsAging, frailty and exercise, Sleep and sleep disorders	Participants98	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestSecondary6 months Stroop Color-Word TestSecondary13 weeks Verbal FluencyPrimary6 months Digit Span TestPrimary6 months
NCT07118904	Start2025	PhaseNot applicable	ConditionsObesity and diabetes, Sleep and sleep disorders	Participants12	Lead sponsorOther	StatusCompleted	Library tests named Stroop Color-Word TestPrimary1 week Symbol CodingPrimary1 week
NCT07027176	Start2025	PhaseNot applicable	ConditionsSleep and sleep disorders	Participants100	Lead sponsorOther	StatusNot yet recruiting	Library tests named Trail Making TestPrimary12 weeks Stroop Color-Word TestPrimary12 weeks Verbal LearningPrimary12 weeks
NCT06967363	Start2025	PhaseObservational	ConditionsSleep and sleep disorders, Pain and fatigue	Participants360	Lead sponsorOther	StatusNot yet recruiting	Library tests named Trail Making TestSecondary12 months Stroop Color-Word TestSecondary12 months Attention Network TestSecondary12 months Mnemonic Similarity TaskSecondary12 months Pain Empathy TaskSecondary12 months Think and No-Think TaskSecondary12 months

Questions, answered from the data

How many sleep trials use the Stroop Color-Word Test?

89 registered sleep and sleep disorders studies on ClinicalTrials.gov name it in an outcome measure, 35 of them in a primary outcome: 12% of the condition's 749 studies with a cognitive outcome, against 12% of all of them. It is the 2nd most named test in sleep trials.

Which tests do sleep trials use with the Stroop Color-Word Test?

The Trail Making Test (34 studies), the Digit Span Test (23 studies) and Verbal Fluency (17 studies).

When do sleep trials measure the Stroop Color-Word Test?

Half of the primary outcomes that name the Stroop Color-Word Test are measured within 8 weeks of the start, and the middle half from 1 week to 4 months. 32 primary outcomes give a duration.

How many completed sleep trials that use the Stroop Color-Word Test have reported results?

14 of the 35 completed studies that name it, 40%, have reported results: 5 posted them on ClinicalTrials.gov, 12 have a results paper linked to the registry record, and 3 did both. The other 21 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 sleep trials: 89 registered studies

Registered sleep and sleep disorders studies name it in an outcome measure: 89
Name it in a primary outcome, 39%: 35 of 89
Of the condition's 749 studies name it, against 12% of all registered studies: 12%; Other conditions
Median participants per study: 65; By phase

Try the Stroop Color-Word Test

Tests named in the same studies

The library tests that sleep and sleep disorders studies naming the Stroop Color-Word Test name most often beside it.

1
Trail Making Test34 studies, 11 as a primary outcome
2
Digit Span Test23 studies, 10 as a primary outcome
3
Verbal Fluency17 studies, 5 as a primary outcome
4
Verbal Learning16 studies, 8 as a primary outcome
5
Psychomotor Vigilance Task15 studies, 6 as a primary outcome
6
Symbol Coding10 studies, 3 as a primary outcome
7
Continuous Performance Test8 studies, 5 as a primary outcome
8
Paced Visual Serial Addition Test6 studies, 3 as a primary outcome
9
Card Sorting Test (Berg)6 studies, 2 as a primary outcome
10
Category Fluency6 studies, 2 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	0	0
2002	0	0
2003	0	0
2004	1	0
2005	0	0
2006	1	0
2007	1	0
2008	0	0
2009	0	0
2010	1	0
2011	0	0
2012	2	1
2013	2	0
2014	2	0
2015	1	1
2016	2	1
2017	1	1
2018	0	0
2019	4	1
2020	5	2
2021	5	3
2022	11	4
2023	11	3
2024	12	6
2025	11	4
2026	16	8

Phases and study sizes

By phase

Early phase 11 studies, 1 as a primary outcome
Phase 11 studies, 0 as a primary outcome
Phase 1/21 studies, 1 as a primary outcome
Phase 23 studies, 1 as a primary outcome
Phase 43 studies, 0 as a primary outcome
Not applicable55 studies, 19 as a primary outcome
Observational25 studies, 13 as a primary outcome

Participants per study

Not applicable54 median, 34 to 100
Observational86 median, 30 to 180

Show as a table

Participants per sleep and sleep disorders study that names the Stroop Color-Word Test, by phase
Phase	Studies with a size	Median	Middle half
Not applicable	55	54	34 to 100
Observational	25	86	30 to 180

When sleep trials measure it

Half of the primary outcomes that name the Stroop Color-Word Test are measured within 8 weeks of the start, and the middle half from 1 week to 4 months. 32 primary outcomes give a duration.

Latest time point of each outcome

Within a day12 outcomes, 6 as a primary outcome
Up to 4 weeks17 outcomes, 6 as a primary outcome
1 to 3 months29 outcomes, 12 as a primary outcome
3 to 6 months11 outcomes, 2 as a primary outcome
6 to 12 months5 outcomes, 1 as a primary outcome
1 to 2 years2 outcomes, 1 as a primary outcome
Over 2 years5 outcomes, 4 as a primary outcome
No duration given8 outcomes, 3 as a primary outcome

A test as a primary outcomeOnly in secondary or other outcomes

81 of the 89 outcome measures give a duration. A single visit counts as within a day.

Status, results, interventions and countries

Status

Recruiting28 studies, 14 as a primary outcome
Not yet recruiting8 studies, 4 as a primary outcome
Active, not recruiting1 studies, 0 as a primary outcome
Completed35 studies, 12 as a primary outcome
Stopped early3 studies, 0 as a primary outcome
Status unknown14 studies, 5 as a primary outcome

What they test

Behavioral22 studies, 7 as a primary outcome
Drug10 studies, 3 as a primary outcome
Device26 studies, 8 as a primary outcome
Dietary supplement8 studies, 2 as a primary outcome
Procedure1 studies, 0 as a primary outcome
Diagnostic test2 studies, 1 as a primary outcome
Combination product2 studies, 1 as a primary outcome
Other23 studies, 11 as a primary outcome
None given10 studies, 6 as a primary outcome

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

26 countries in all. A study with sites in several counts in each; 3 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 sleep and sleep disorders studies that name the Stroop Color-Word Test: 14 of 35, 40%

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

Completed sleep and sleep disorders studies that name the Stroop Color-Word Test and every completed study, by how they reported results
Results	Completed sleep and sleep disorders studies that name the Stroop Color-Word Test	Every completed study
Results on ClinicalTrials.gov and a paper	3, 9%	776, 10%
Results on ClinicalTrials.gov only	2, 6%	1,139, 14%
A results paper only	9, 26%	1,711, 22%
Neither	21, 60%	4,327, 54%

The 89 studies

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

89 studies match. 35 name the Stroop Color-Word Test in a primary outcome. Median size 65 participants. Median time to the primary outcome: 8 weeks.

Loading 89 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	0	0
2002	0	0
2003	0	0
2004	1	0
2005	0	0
2006	1	0
2007	1	0
2008	0	0
2009	0	0
2010	1	0
2011	0	0
2012	2	1
2013	2	0
2014	2	0
2015	1	1
2016	2	1
2017	1	1
2018	0	0
2019	4	1
2020	5	2
2021	5	3
2022	11	4
2023	11	3
2024	12	6
2025	11	4
2026	16	8

Library tests named most

Largest condition groups

Sleep and sleep disorders89 studies, 35 as a primary outcome
Pain and fatigue15 studies, 6 as a primary outcome
Depression and bipolar disorder8 studies, 3 as a primary outcome
Aging, frailty and exercise6 studies, 1 as a primary outcome
Mild cognitive impairment5 studies, 2 as a primary outcome
Cancer5 studies, 4 as a primary outcome
Anxiety, PTSD and OCD5 studies, 2 as a primary outcome
Cardiovascular disease4 studies, 1 as a primary outcome
Dementia and Alzheimer's3 studies, 2 as a primary outcome
Stroke3 studies, 0 as a primary outcome
Parkinson's disease3 studies, 1 as a primary outcome
Healthy volunteers3 studies, 0 as a primary outcome

Phases

Participants

Lead sponsor: industry 2, other 87. Interventional 64, observational 25.

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
NCT07897474	Start2026	PhaseObservational	ConditionsSleep and sleep disorders	Participants100	Lead sponsorOther	StatusNot yet recruiting	Library tests named Trail Making TestPrimary Stroop Color-Word TestPrimary Digit Span TestPrimary Symbol CodingPrimary Psychomotor Vigilance TaskPrimary
NCT07882433	Start2026	PhaseNot applicable	ConditionsSleep and sleep disorders	Participants50	Lead sponsorOther	StatusNot yet recruiting	Library tests named Trail Making TestSecondary6 months Stroop Color-Word TestSecondary6 months Verbal FluencySecondary6 months Digit Span TestSecondary6 months Paced Visual Serial Addition TestSecondary6 months
NCT07803068	Start2025	PhaseNot applicable	ConditionsSleep and sleep disorders	Participants40	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestSecondary12 weeks Stroop Color-Word TestSecondary12 weeks Grid Pattern Span TaskSecondary12 weeks
NCT07799753	Start2026	PhaseNot applicable	ConditionsSleep and sleep disorders	Participants50	Lead sponsorOther	StatusNot yet recruiting	Library tests named Trail Making TestSecondary4 weeks Stroop Color-Word TestSecondary4 weeks Digit Span TestSecondary4 weeks Symbol CodingSecondary4 weeks
NCT07740967	Start2026	PhaseNot applicable	ConditionsSleep and sleep disorders, Pain and fatigue, Cardiovascular disease	Participants34	Lead sponsorOther	StatusRecruiting	Library tests named Stroop Color-Word TestSecondary8 weeks Digit Span TestSecondary8 weeks Pattern and Letter ComparisonSecondary8 weeks
NCT07735910	Start2026	PhaseNot applicable	ConditionsMild cognitive impairment, Depression and bipolar disorder, Sleep and sleep disorders, Anxiety, PTSD and OCD	Participants60	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestPrimary2 weeks Stroop Color-Word TestPrimary2 weeks Digit Span TestPrimary2 weeks
NCT07729930	Start2026	PhaseNot applicable	ConditionsSleep and sleep disorders, Pain and fatigue, Cardiovascular disease	Participants38	Lead sponsorOther	StatusRecruiting	Library tests named Stroop Color-Word TestPrimary8 weeks Digit Span TestPrimary8 weeks Pattern and Letter ComparisonPrimary8 weeks
NCT07706283	Start2025	PhaseNot applicable	ConditionsHealthy volunteers, Sleep and sleep disorders, Pain and fatigue	Participants81	Lead sponsorOther	StatusCompleted	Library tests named Stroop Color-Word TestSecondary6 weeks Eriksen Flanker TaskPrimary6 weeks Task Switching TestSecondary6 weeks
NCT07665840	Start2025	PhaseNot applicable	ConditionsDepression and bipolar disorder, Sleep and sleep disorders, Anxiety, PTSD and OCD	Participants67	Lead sponsorOther	StatusCompleted	Library tests named Trail Making TestSecondary8 weeks Stroop Color-Word TestSecondary8 weeks
NCT07644611	Start2026	PhaseObservational	ConditionsSleep and sleep disorders, Pain and fatigue	Participants30	Lead sponsorOther	StatusRecruiting	Library tests named Stroop Color-Word TestPrimary
NCT07556432	Start2026	PhaseNot applicable	ConditionsSleep and sleep disorders	Participants120	Lead sponsorOther	StatusNot yet recruiting	Library tests named Trail Making TestSecondary6 months Stroop Color-Word TestSecondary6 months Verbal FluencySecondary6 months Category FluencySecondary6 months Selective Reminding TaskSecondary6 months
NCT07553507	Start2026	PhaseNot applicable	ConditionsAging, frailty and exercise, Sleep and sleep disorders	Participants80	Lead sponsorOther	StatusRecruiting	Library tests named Stroop Color-Word TestSecondary6 months Day-Night TaskSecondary6 months
NCT07536503	Start2026	PhaseObservational	ConditionsMultiple sclerosis, Sleep and sleep disorders	Participants80	Lead sponsorOther	StatusRecruiting	Library tests named Stroop Color-Word TestPrimarysame day
NCT07536490	Start2026	PhaseObservational	ConditionsParkinson's disease, Sleep and sleep disorders	Participants69	Lead sponsorOther	StatusCompleted	Library tests named Stroop Color-Word TestPrimarysame day Clock Drawing TaskPrimarysame day
NCT07495592	Start2026	PhaseNot applicable	ConditionsSleep and sleep disorders, Pain and fatigue	Participants32	Lead sponsorIndustry	StatusCompleted	Library tests named Stroop Color-Word TestSecondarysame day Psychomotor Vigilance TaskPrimarysame day
NCT07480096	Start2024	PhasePhase 2	ConditionsSleep and sleep disorders	Participants82	Lead sponsorOther	StatusCompleted Paper	Library tests named Stroop Color-Word TestSecondary2 weeks
NCT07387783	Start2026	PhaseObservational	ConditionsSleep and sleep disorders	Participants75	Lead sponsorOther	StatusRecruiting	Library tests named Stroop Color-Word TestSecondary
NCT07364318	Start2024	PhaseObservational	ConditionsSleep and sleep disorders	Participants30	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestPrimarysame day Stroop Color-Word TestPrimarysame day Verbal LearningPrimarysame day Verbal FluencyPrimarysame day Digit Span TestPrimarysame day Category FluencyPrimarysame day Task Switching TestPrimarysame day
NCT07355842	Start2026	PhaseNot applicable	ConditionsParkinson's disease, Sleep and sleep disorders	Participants80	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestSecondary18 months Stroop Color-Word TestSecondary18 months Verbal LearningSecondary18 months Verbal FluencySecondary18 months Digit Span TestSecondary18 months Category FluencySecondary18 months Picture Naming TestSecondary18 months Psychomotor Vigilance TaskOther outcome18 months Complex Figure Copy and RecallSecondary18 months Finger Tapping TaskSecondary18 months Sustained Attention to ResponseOther outcome18 months Line Angle MatchingSecondary18 months
NCT07329049	Start2026	PhaseNot applicable	ConditionsSleep and sleep disorders	Participants42	Lead sponsorOther	StatusNot yet recruiting	Library tests named Stroop Color-Word TestPrimary8 weeks Verbal FluencyPrimary8 weeks Digit Span TestPrimary8 weeks
NCT07191119	Start2026	PhaseNot applicable	ConditionsCancer, Sleep and sleep disorders	Participants40	Lead sponsorOther	StatusRecruiting	Library tests named Stroop Color-Word TestPrimary8 weeks Continuous Performance TestPrimary8 weeks
NCT07156708	Start2025	PhaseNot applicable	ConditionsAging, frailty and exercise, Sleep and sleep disorders	Participants98	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestSecondary6 months Stroop Color-Word TestSecondary13 weeks Verbal FluencyPrimary6 months Digit Span TestPrimary6 months
NCT07118904	Start2025	PhaseNot applicable	ConditionsObesity and diabetes, Sleep and sleep disorders	Participants12	Lead sponsorOther	StatusCompleted	Library tests named Stroop Color-Word TestPrimary1 week Symbol CodingPrimary1 week
NCT07027176	Start2025	PhaseNot applicable	ConditionsSleep and sleep disorders	Participants100	Lead sponsorOther	StatusNot yet recruiting	Library tests named Trail Making TestPrimary12 weeks Stroop Color-Word TestPrimary12 weeks Verbal LearningPrimary12 weeks
NCT06967363	Start2025	PhaseObservational	ConditionsSleep and sleep disorders, Pain and fatigue	Participants360	Lead sponsorOther	StatusNot yet recruiting	Library tests named Trail Making TestSecondary12 months Stroop Color-Word TestSecondary12 months Attention Network TestSecondary12 months Mnemonic Similarity TaskSecondary12 months Pain Empathy TaskSecondary12 months Think and No-Think TaskSecondary12 months

Questions, answered from the data

How many sleep trials use the Stroop Color-Word Test?

Which tests do sleep trials use with the Stroop Color-Word Test?

The Trail Making Test (34 studies), the Digit Span Test (23 studies) and Verbal Fluency (17 studies).

When do sleep trials measure the Stroop Color-Word Test?

Half of the primary outcomes that name the Stroop Color-Word Test are measured within 8 weeks of the start, and the middle half from 1 week to 4 months. 32 primary outcomes give a duration.

How many completed sleep 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 sleep trials: 89 registered studies

Tests named in the same studies

Studies by start year

Phases and study sizes

By phase

Participants per study

When sleep 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 89 studies

Library tests named most

Largest condition groups

Phases

Participants

The studies, newest registration first

Questions, answered from the data

How many sleep trials use the Stroop Color-Word Test?

Which tests do sleep trials use with the Stroop Color-Word Test?

When do sleep trials measure the Stroop Color-Word Test?

How many completed sleep trials that use the Stroop Color-Word Test have reported results?

More on the Stroop Color-Word Test and sleep and sleep disorders

The Stroop Color-Word Test in other conditions

Other tests in sleep trials

How the studies are counted

Run the Stroop Color-Word Test in your trial

Stroop Color-Word Test in sleep trials: 89 registered studies

Tests named in the same studies

Studies by start year

Phases and study sizes

By phase

Participants per study

When sleep 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 89 studies

Library tests named most

Largest condition groups

Phases

Participants

The studies, newest registration first

Questions, answered from the data

How many sleep trials use the Stroop Color-Word Test?

Which tests do sleep trials use with the Stroop Color-Word Test?

When do sleep trials measure the Stroop Color-Word Test?

How many completed sleep trials that use the Stroop Color-Word Test have reported results?

More on the Stroop Color-Word Test and sleep and sleep disorders

The Stroop Color-Word Test in other conditions

Other tests in sleep trials

How the studies are counted

Run the Stroop Color-Word Test in your trial