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    16,361Registered studies name a cognitive test in an outcome measure11,688 name a test you can run hereExplore the studies
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  1. Home
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  5. /Multiple sclerosis
  6. /Stroop Color-Word Test

Clinical trials data

Stroop Color-Word Test in multiple sclerosis trials: 56 registered studies

Every registered multiple sclerosis 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 multiple sclerosis studies name it in an outcome measure
56
Name it in a primary outcome, 36%
20 of 56
Of the condition's 612 studies name it, against 12% of all registered studies
9%
Other conditions
Median participants per study
62
By phase
Try the Stroop Color-Word Test

Tests named in the same studies

The library tests that multiple sclerosis studies naming the Stroop Color-Word Test name most often beside it.
  1. 1

    Symbol Coding38 studies, 18 as a primary outcome

  2. 2

    Trail Making Test22 studies, 3 as a primary outcome

  3. 3

    Paced Visual Serial Addition Test19 studies, 10 as a primary outcome

  4. 4

    Verbal Learning19 studies, 8 as a primary outcome

  5. 5

    Verbal Fluency18 studies, 5 as a primary outcome

  6. 6

    Digit Span Test7 studies, 1 as a primary outcome

  7. 7

    Selective Reminding Task7 studies, 1 as a primary outcome

  8. 8

    Go/No-Go Task3 studies, 0 as a primary outcome

  9. 9

    Continuous Performance Test2 studies, 1 as a primary outcome

  10. 10

    N-Back Task2 studies, 1 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.
02000: 0 studies, 0 with a test as a primary outcome20002001: 0 studies, 0 with a test as a primary outcome2002: 0 studies, 0 with a test as a primary outcome2003: 0 studies, 0 with a test as a primary outcome2004: 1 studies, 0 with a test as a primary outcome2005: 0 studies, 0 with a test as a primary outcome20052006: 0 studies, 0 with a test as a primary outcome2007: 0 studies, 0 with a test as a primary outcome2008: 0 studies, 0 with a test as a primary outcome2009: 3 studies, 2 with a test as a primary outcome2010: 1 studies, 0 with a test as a primary outcome20102011: 0 studies, 0 with a test as a primary outcome2012: 0 studies, 0 with a test as a primary outcome2013: 3 studies, 1 with a test as a primary outcome2014: 2 studies, 2 with a test as a primary outcome2015: 1 studies, 1 with a test as a primary outcome20152016: 3 studies, 1 with a test as a primary outcome2017: 1 studies, 0 with a test as a primary outcome2018: 4 studies, 2 with a test as a primary outcome2019: 3 studies, 2 with a test as a primary outcome2020: 2 studies, 1 with a test as a primary outcome20202021: 3 studies, 1 with a test as a primary outcome2022: 3 studies, 0 with a test as a primary outcome2023: 8 studies, 2 with a test as a primary outcome2024: 8 studies, 3 with a test as a primary outcome2025: 2 studies, 0 with a test as a primary outcome20252026: 8 studies, 2 with a test as a primary outcome

A test as a primary outcomeOnly in secondary or other outcomes

Show as a table
Registered studies by start year
Start yearStudiesA test as a primary outcome
200000
200100
200200
200300
200410
200500
200600
200700
200800
200932
201010
201100
201200
201331
201422
201511
201631
201710
201842
201932
202021
202131
202230
202382
202483
202520
202682

Phases and study sizes

By phase

  • Phase 11 studies, 0 as a primary outcome
  • Phase 1/21 studies, 1 as a primary outcome
  • Phase 21 studies, 0 as a primary outcome
  • Phase 2/32 studies, 1 as a primary outcome
  • Phase 31 studies, 1 as a primary outcome
  • Phase 41 studies, 0 as a primary outcome
  • Not applicable41 studies, 14 as a primary outcome
  • Observational8 studies, 3 as a primary outcome

Participants per study

102050100
  • Not applicable60 median, 32 to 96
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 multiple sclerosis study that names the Stroop Color-Word Test, by phase
PhaseStudies with a sizeMedianMiddle half
Not applicable396032 to 96

When multiple sclerosis trials measure it

Half of the primary outcomes that name the Stroop Color-Word Test are measured within 4 months of the start, and the middle half from 6 weeks to 15 months. 16 primary outcomes give a duration.

Latest time point of each outcome

  • Within a day8 outcomes, 3 as a primary outcome
  • Up to 4 weeks7 outcomes, 1 as a primary outcome
  • 1 to 3 months13 outcomes, 4 as a primary outcome
  • 3 to 6 months10 outcomes, 2 as a primary outcome
  • 6 to 12 months3 outcomes, 2 as a primary outcome
  • 1 to 2 years5 outcomes, 3 as a primary outcome
  • Over 2 years3 outcomes, 1 as a primary outcome
  • No duration given7 outcomes, 4 as a primary outcome

A test as a primary outcomeOnly in secondary or other outcomes

49 of the 56 outcome measures give a duration. A single visit counts as within a day.

Status, results, interventions and countries

Status

  • Recruiting15 studies, 1 as a primary outcome
  • Not yet recruiting6 studies, 2 as a primary outcome
  • Completed21 studies, 12 as a primary outcome
  • Stopped early5 studies, 1 as a primary outcome
  • Status unknown9 studies, 4 as a primary outcome

What they test

  • Behavioral12 studies, 4 as a primary outcome
  • Drug7 studies, 3 as a primary outcome
  • Device14 studies, 2 as a primary outcome
  • Dietary supplement2 studies, 1 as a primary outcome
  • Diagnostic test2 studies, 0 as a primary outcome
  • Other17 studies, 9 as a primary outcome
  • None given4 studies, 2 as a primary outcome

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

Where their sites are

  • Italy11 studies, 4 as a primary outcome
  • United States8 studies, 3 as a primary outcome
  • France6 studies, 1 as a primary outcome
  • Türkiye6 studies, 4 as a primary outcome
  • Netherlands4 studies, 0 as a primary outcome
  • Switzerland4 studies, 0 as a primary outcome
  • Belgium3 studies, 3 as a primary outcome
  • China2 studies, 0 as a primary outcome
  • Portugal2 studies, 1 as a primary outcome
  • Sweden2 studies, 1 as a primary outcome
  • United Kingdom2 studies, 0 as a primary outcome
  • Canada1 studies, 1 as a primary outcome

16 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 multiple sclerosis studies that name the Stroop Color-Word Test: 10 of 21, 48%

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

Completed multiple sclerosis studies that name the Stroop Color-Word Test and every completed study, by how they reported results
ResultsCompleted multiple sclerosis studies that name the Stroop Color-Word TestEvery completed study
Results on ClinicalTrials.gov and a paper0, 0%776, 10%
Results on ClinicalTrials.gov only2, 10%1,139, 14%
A results paper only8, 38%1,711, 22%
Neither11, 52%4,327, 54%

The 56 studies

Filter by phase, sponsor, status, country, intervention, outcome list, size and start year. Each study links to its record on ClinicalTrials.gov.
ConditionMultiple sclerosis
TestThe Stroop Color-Word Test

56 studies match. 20 name the Stroop Color-Word Test in a primary outcome. Median size 62 participants. Median time to the primary outcome: 4 months.

Loading 56 studies; the filters turn on when they arrive.

By start year
024682000: 0 studies, 0 naming the Stroop Color-Word Test in a primary outcome20002001: 0 studies, 0 naming the Stroop Color-Word Test in a primary outcome2002: 0 studies, 0 naming the Stroop Color-Word Test in a primary outcome2003: 0 studies, 0 naming the Stroop Color-Word Test in a primary outcome2004: 1 studies, 0 naming the Stroop Color-Word Test in a primary outcome2005: 0 studies, 0 naming the Stroop Color-Word Test in a primary outcome20052006: 0 studies, 0 naming the Stroop Color-Word Test in a primary outcome2007: 0 studies, 0 naming the Stroop Color-Word Test in a primary outcome2008: 0 studies, 0 naming the Stroop Color-Word Test in a primary outcome2009: 3 studies, 2 naming the Stroop Color-Word Test in a primary outcome2010: 1 studies, 0 naming the Stroop Color-Word Test in a primary outcome20102011: 0 studies, 0 naming the Stroop Color-Word Test in a primary outcome2012: 0 studies, 0 naming the Stroop Color-Word Test in a primary outcome2013: 3 studies, 1 naming the Stroop Color-Word Test in a primary outcome2014: 2 studies, 2 naming the Stroop Color-Word Test in a primary outcome2015: 1 studies, 1 naming the Stroop Color-Word Test in a primary outcome20152016: 3 studies, 1 naming the Stroop Color-Word Test in a primary outcome2017: 1 studies, 0 naming the Stroop Color-Word Test in a primary outcome2018: 4 studies, 2 naming the Stroop Color-Word Test in a primary outcome2019: 3 studies, 2 naming the Stroop Color-Word Test in a primary outcome2020: 2 studies, 1 naming the Stroop Color-Word Test in a primary outcome20202021: 3 studies, 1 naming the Stroop Color-Word Test in a primary outcome2022: 3 studies, 0 naming the Stroop Color-Word Test in a primary outcome2023: 8 studies, 2 naming the Stroop Color-Word Test in a primary outcome2024: 8 studies, 3 naming the Stroop Color-Word Test in a primary outcome2025: 2 studies, 0 naming the Stroop Color-Word Test in a primary outcome20252026: 8 studies, 2 naming the Stroop Color-Word Test in a primary outcome

2026 is partly planned starts.

Show as a table
Matching studies by start year
Start yearStudiesAs a primary outcome
200000
200100
200200
200300
200410
200500
200600
200700
200800
200932
201010
201100
201200
201331
201422
201511
201631
201710
201842
201932
202021
202131
202230
202382
202483
202520
202682

Library tests named most

  • Stroop Color-Word Test56 studies, 20 as a primary outcome
  • Symbol Coding38 studies, 18 as a primary outcome
  • Trail Making Test22 studies, 3 as a primary outcome
  • Paced Visual Serial Addition Test19 studies, 10 as a primary outcome
  • Verbal Learning19 studies, 8 as a primary outcome
  • Verbal Fluency18 studies, 5 as a primary outcome
  • Digit Span Test7 studies, 1 as a primary outcome
  • Selective Reminding Task7 studies, 1 as a primary outcome
  • Go/No-Go Task3 studies, 0 as a primary outcome
  • Continuous Performance Test2 studies, 1 as a primary outcome

Conditions

  • Multiple sclerosis56 studies, 20 as a primary outcome
  • Parkinson's disease4 studies, 0 as a primary outcome
  • Pain and fatigue4 studies, 1 as a primary outcome
  • Aging, frailty and exercise3 studies, 1 as a primary outcome
  • Mild cognitive impairment2 studies, 0 as a primary outcome
  • Stroke2 studies, 0 as a primary outcome
  • Sleep and sleep disorders2 studies, 1 as a primary outcome
  • Dementia and Alzheimer's1 study, 0 as a primary outcome
  • Depression and bipolar disorder1 study, 0 as a primary outcome
  • Cancer1 study, 0 as a primary outcome
  • Healthy volunteers1 study, 0 as a primary outcome
  • Epilepsy1 study, 0 as a primary outcome

Phases

Participants

Lead sponsor: industry 3, other 53. Interventional 48, observational 8.

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.
StudyStartPhaseConditionsParticipantsLead sponsorStatusLibrary tests named, with the latest time point
NCT07842302Start2026PhaseNot applicableConditionsMultiple sclerosis, Pain and fatigueParticipants80Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Trail Making TestSecondary6 months
  • Stroop Color-Word TestSecondary6 months
  • Verbal FluencySecondary6 months
  • Symbol CodingPrimary6 months
  • Paced Visual Serial Addition TestSecondary6 months
  • Selective Reminding TaskSecondary6 months
NCT07759115Start2026PhaseNot applicableConditionsMultiple sclerosisParticipants64Lead sponsorOtherStatusRecruitingLibrary tests named
  • Trail Making TestSecondary4 weeks
  • Stroop Color-Word TestSecondary4 weeks
  • Symbol CodingSecondary4 weeks
NCT07734675Start2026PhaseNot applicableConditionsMultiple sclerosisParticipants130Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Stroop Color-Word TestPrimary2 years
  • Verbal LearningPrimary2 years
  • Symbol CodingPrimary2 years
  • Picture Naming TestPrimary2 years
  • Paced Visual Serial Addition TestPrimary2 years
  • Cancellation TestPrimary2 years
  • Selective Reminding TaskPrimary2 years
NCT07616050Start2026PhaseNot applicableConditionsMild cognitive impairment, Stroke, Parkinson's disease, Multiple sclerosis, Aging, frailty and exerciseParticipants70Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Trail Making TestSecondary9 weeks
  • Stroop Color-Word TestSecondary9 weeks
NCT07546721Start2026PhaseNot applicableConditionsMultiple sclerosisParticipants12Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Stroop Color-Word TestSecondary6 months
  • Symbol CodingSecondary12 weeks
  • Paced Visual Serial Addition TestSecondary12 weeks
NCT07536503Start2026PhaseObservationalConditionsMultiple sclerosis, Sleep and sleep disordersParticipants80Lead sponsorOtherStatusRecruitingLibrary tests named
  • Stroop Color-Word TestPrimarysame day
NCT07452562Start2026PhaseNot applicableConditionsMultiple sclerosisParticipants60Lead sponsorOtherStatusRecruitingLibrary tests named
  • Trail Making TestSecondary12 weeks
  • Stroop Color-Word TestSecondary12 weeks
  • Symbol CodingSecondary12 weeks
  • Continuous Performance TestSecondary12 weeks
  • AX Continuous Performance TestWording unclear
NCT07434934Start2026PhaseNot applicableConditionsMultiple sclerosisParticipants40Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Stroop Color-Word TestSecondary6 weeks
  • Verbal LearningSecondary6 weeks
  • Symbol CodingSecondary6 weeks
NCT07225868Start2025PhaseNot applicableConditionsMultiple sclerosisParticipants126Lead sponsorOtherStatusRecruitingLibrary tests named
  • Trail Making TestSecondary4 months
  • Stroop Color-Word TestSecondary4 months
  • Verbal FluencySecondary4 months
  • Symbol CodingPrimary4 months
NCT07087873Start2025PhaseNot applicableConditionsMultiple sclerosisParticipants128Lead sponsorOtherStatusRecruitingLibrary tests named
  • Stroop Color-Word TestSecondary4 weeks
  • Symbol CodingPrimary4 weeks
NCT06968039Start2024PhaseNot applicableConditionsMultiple sclerosisParticipants85Lead sponsorOtherStatusRecruitingLibrary tests named
  • Stroop Color-Word TestSecondary
  • Verbal LearningSecondary
  • Digit Span TestSecondary
  • Symbol CodingPrimary
NCT06820125Start2023PhaseNot applicableConditionsMultiple sclerosisParticipants48Lead sponsorOtherStatusRecruitingLibrary tests named
  • Trail Making TestSecondary9 weeks
  • Stroop Color-Word TestSecondary9 weeks
  • Verbal FluencySecondary9 weeks
  • Symbol CodingPrimary9 weeks
  • N-Back TaskSecondary9 weeks
  • Go/No-Go TaskSecondary9 weeks
  • Category FluencySecondary9 weeks
  • Paced Visual Serial Addition TestSecondary9 weeks
  • Selective Reminding TaskSecondary9 weeks
  • Design Fluency TestSecondary9 weeks
NCT06721416Start2024PhaseNot applicableConditionsMultiple sclerosis, Pain and fatigueParticipants12Lead sponsorOtherStatusCompletedLibrary tests named
  • Stroop Color-Word TestPrimary
  • Symbol CodingPrimary
  • N-Back TaskPrimary
NCT06672770Start2024PhaseNot applicableConditionsMultiple sclerosisParticipants63Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Stroop Color-Word TestPrimary8 weeks
  • Symbol CodingPrimary8 weeks
  • Paced Visual Serial Addition TestPrimary8 weeks
NCT06592352Start2024PhasePhase 2ConditionsMultiple sclerosisParticipants64Lead sponsorOtherStatusRecruitingLibrary tests named
  • Stroop Color-Word TestSecondary13 weeks
  • Symbol CodingSecondary13 weeks
  • Go/No-Go TaskSecondarysame day
NCT06526364Start2024PhaseObservationalConditionsMultiple sclerosisParticipants100Lead sponsorOtherStatusRecruitingLibrary tests named
  • Trail Making TestSecondary5 years
  • Stroop Color-Word TestSecondary5 years
  • Verbal LearningSecondary5 years
  • Digit Span TestSecondary5 years
  • Symbol CodingSecondary5 years
  • Complex Figure Copy and RecallSecondary5 years
NCT06462339Start2024PhaseNot applicableConditionsMultiple sclerosisParticipants28Lead sponsorOtherStatusCompleted

Paper

Library tests named
  • Trail Making TestPrimary
  • Stroop Color-Word TestPrimary
NCT06312046Start2024PhaseNot applicableConditionsMultiple sclerosisParticipants90Lead sponsorOtherStatusRecruitingLibrary tests named
  • Trail Making TestSecondary10 weeks
  • Stroop Color-Word TestSecondary10 weeks
  • Verbal LearningSecondary10 weeks
  • Symbol CodingSecondary10 weeks
NCT06303024Start2023PhaseNot applicableConditionsMultiple sclerosisParticipants140Lead sponsorOtherStatusStatus unknownLibrary tests named
  • Stroop Color-Word TestPrimary12 months
  • Verbal LearningPrimary12 months
  • Verbal FluencyPrimary12 months
  • Symbol CodingPrimary12 months
NCT06112639Start2024PhaseNot applicableConditionsDementia and Alzheimer's, Mild cognitive impairment, Multiple sclerosis, CancerParticipants192Lead sponsorOtherStatusRecruitingLibrary tests named
  • Trail Making TestSecondary6 months
  • Stroop Color-Word TestSecondary6 months
  • Verbal FluencySecondary6 months
  • Symbol CodingSecondary6 months
  • Category FluencySecondary6 months
  • Selective Reminding TaskSecondary6 months
  • Delayed Recall ModuleSecondary6 months
NCT06062693Start2023PhaseNot applicableConditionsStroke, Parkinson's disease, Multiple sclerosisParticipants160Lead sponsorOtherStatusRecruitingLibrary tests named
  • Stroop Color-Word TestSecondary3 weeks
NCT05983809Start2023PhaseNot applicableConditionsMultiple sclerosisParticipants24Lead sponsorOtherStatusRecruitingLibrary tests named
  • Stroop Color-Word TestSecondary8 weeks
  • Symbol CodingSecondary8 weeks
NCT05811013Start2023PhaseNot applicableConditionsMultiple sclerosisParticipants40Lead sponsorOtherStatusStatus unknownLibrary tests named
  • Stroop Color-Word TestSecondary6 months
  • Symbol CodingSecondary6 months
  • Paced Visual Serial Addition TestSecondary6 months
  • Selective Reminding TaskSecondary6 months
NCT05792176Start2023PhaseNot applicableConditionsMultiple sclerosisParticipants29Lead sponsorOtherStatusCompletedLibrary tests named
  • Trail Making TestSecondary4 weeks
  • Stroop Color-Word TestSecondary4 weeks
  • Symbol CodingSecondary4 weeks
NCT05787704Start2023PhaseObservationalConditionsMultiple sclerosis, Aging, frailty and exerciseParticipants41Lead sponsorOtherStatusCompletedLibrary tests named
  • Trail Making TestSecondarysame day
  • Stroop Color-Word TestPrimary
  • Verbal LearningSecondarysame day
  • Verbal FluencySecondarysame day
  • Symbol CodingSecondarysame day

Page 1 of 3

Questions, answered from the data

How many multiple sclerosis trials use the Stroop Color-Word Test?

56 registered multiple sclerosis studies on ClinicalTrials.gov name it in an outcome measure, 20 of them in a primary outcome: 9% of the condition's 612 studies with a cognitive outcome, against 12% of all of them. It is the 5th most named test in multiple sclerosis trials.

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

Symbol Coding (38 studies), the Trail Making Test (22 studies) and the Paced Visual Serial Addition Test (19 studies).

When do multiple sclerosis trials measure the Stroop Color-Word Test?

Half of the primary outcomes that name the Stroop Color-Word Test are measured within 4 months of the start, and the middle half from 6 weeks to 15 months. 16 primary outcomes give a duration.

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

10 of the 21 completed studies that name it, 48%, have reported results: 2 posted them on ClinicalTrials.gov, 8 have a results paper linked to the registry record, and 0 did both. The other 11 show neither. Of all completed studies with a cognitive outcome, 46% have reported results.

More on the Stroop Color-Word Test and multiple sclerosis

  • Every cognitive test in multiple sclerosis trials: 612 studies
  • The Stroop Color-Word Test in all clinical trials: 1,929 studies

The Stroop Color-Word Test in other conditions

  • Aging, frailty and exercise230
  • Depression and bipolar disorder138
  • Mild cognitive impairment126
  • Parkinson's disease126
  • Dementia and Alzheimer's116
  • Pain and fatigue114
  • Stroke105
  • Obesity and diabetes103
  • Healthy volunteers98
  • Sleep and sleep disorders89
  • Cardiovascular disease81
  • Anxiety, PTSD and OCD79
  • Substance use and addiction75
  • Cancer65
  • ADHD61
  • Brain injury and concussion59

Other tests in multiple sclerosis trials

  • Symbol Coding375
  • Paced Visual Serial Addition Test169
  • Verbal Learning139
  • Verbal Fluency58

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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