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    1. Verbal Fluency TestGradeA
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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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  3. /Clinical trials
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  5. /Go/No-Go Task

Clinical trials data

Go/No-Go Task in clinical trials: 702 registered studies

Every registered study on ClinicalTrials.gov that names the Go/No-Go Task in an outcome measure: the conditions it is used in, how often it is a primary outcome, the tests it is named with, and how large the studies are.

Registered studies name it in an outcome measure
702
Name it in a primary outcome, 44%
309 of 702
Against similar tests
Of studies started 2021 to 2025 name it, against 4.2% in 2016 to 2020
4.7%
By year
Median participants per study
60
By phase
Try the Go/No-Go TaskTry the Go/No-Go Game

The conditions it is used in

Each study counted once in each condition group it falls in.

  1. Substance use and addiction80 studies, 31 as a primary outcome

  2. Depression and bipolar disorder79 studies, 33 as a primary outcome

  3. ADHD65 studies, 32 as a primary outcome

  4. Anxiety, PTSD and OCD63 studies, 28 as a primary outcome

  5. Obesity and diabetes44 studies, 17 as a primary outcome

  6. Sleep and sleep disorders44 studies, 14 as a primary outcome

  7. Healthy volunteers42 studies, 22 as a primary outcome

  8. Aging, frailty and exercise41 studies, 22 as a primary outcome

  9. Pain and fatigue22 studies, 8 as a primary outcome

  10. Dementia and Alzheimer's20 studies, 9 as a primary outcome

  11. Parkinson's disease18 studies, 8 as a primary outcome

  12. Autism17 studies, 7 as a primary outcome

  13. Mild cognitive impairment16 studies, 4 as a primary outcome

  14. Schizophrenia and psychosis15 studies, 3 as a primary outcome

  15. Stroke12 studies, 0 as a primary outcome

  16. Brain injury and concussion12 studies, 7 as a primary outcome

  17. Cardiovascular disease12 studies, 4 as a primary outcome

  18. Multiple sclerosis10 studies, 2 as a primary outcome

  19. Cancer10 studies, 6 as a primary outcome

  20. Cognitive impairment and decline7 studies, 2 as a primary outcome

  21. Epilepsy5 studies, 4 as a primary outcome

  22. Delirium, surgery and intensive care4 studies, 2 as a primary outcome

  23. COVID-19 and long COVID2 studies, 1 as a primary outcome

  24. Hearing loss2 studies, 0 as a primary outcome

  25. Other conditions178 studies, 87 as a primary outcome

A test as a primary outcomeOnly in secondary or other outcomes

How often it is a primary outcome

The Go/No-Go Task is a primary outcome in 44% of its studies. Across the 4 response inhibition tests with a page here, the median is 45%.

  1. Antisaccade Task60% of 68 studies

  2. Stop-Signal Task46% of 321 studies

  3. Go/No-Go Task44% of 702 studies

  4. Affective Go/No-Go38% of 48 studies

Studies by start year

4.7% of the registered studies that started in 2021 to 2025 name it, against 4.2% of those that started in 2016 to 2020. 2026 is partly planned starts.
02000: 0 studies, 0 with a test as a primary outcome20002001: 1 studies, 1 with a test as a primary outcome2002: 2 studies, 1 with a test as a primary outcome2003: 1 studies, 1 with a test as a primary outcome2004: 2 studies, 2 with a test as a primary outcome2005: 0 studies, 0 with a test as a primary outcome20052006: 1 studies, 0 with a test as a primary outcome2007: 1 studies, 0 with a test as a primary outcome2008: 4 studies, 1 with a test as a primary outcome2009: 5 studies, 3 with a test as a primary outcome2010: 8 studies, 1 with a test as a primary outcome20102011: 13 studies, 4 with a test as a primary outcome2012: 13 studies, 6 with a test as a primary outcome2013: 19 studies, 3 with a test as a primary outcome2014: 22 studies, 9 with a test as a primary outcome2015: 24 studies, 13 with a test as a primary outcome20152016: 34 studies, 18 with a test as a primary outcome2017: 37 studies, 13 with a test as a primary outcome2018: 40 studies, 16 with a test as a primary outcome2019: 46 studies, 17 with a test as a primary outcome2020: 32 studies, 18 with a test as a primary outcome20202021: 62 studies, 31 with a test as a primary outcome2022: 60 studies, 27 with a test as a primary outcome2023: 67 studies, 37 with a test as a primary outcome2024: 64 studies, 32 with a test as a primary outcome2025: 77 studies, 28 with a test as a primary outcome20252026: 64 studies, 26 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
200111
200221
200311
200422
200500
200610
200710
200841
200953
201081
2011134
2012136
2013193
2014229
20152413
20163418
20173713
20184016
20194617
20203218
20216231
20226027
20236737
20246432
20257728
20266426

Phases and study sizes

By phase

  • Early phase 110 studies, 8 as a primary outcome
  • Phase 114 studies, 6 as a primary outcome
  • Phase 1/29 studies, 5 as a primary outcome
  • Phase 240 studies, 12 as a primary outcome
  • Phase 2/34 studies, 1 as a primary outcome
  • Phase 317 studies, 2 as a primary outcome
  • Phase 431 studies, 21 as a primary outcome
  • Not applicable486 studies, 203 as a primary outcome
  • Observational91 studies, 51 as a primary outcome

Participants per study

102050100200
  • Early phase 140 median, 20 to 56
  • Phase 120 median, 16 to 55
  • Phase 244 median, 17 to 85
  • Phase 350 median, 39 to 114
  • Phase 466 median, 43 to 103
  • Not applicable60 median, 32 to 106
  • Observational99 median, 48 to 200
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 study that names the Go/No-Go Task, by phase
PhaseStudies with a sizeMedianMiddle half
Early phase 1104020 to 56
Phase 1142016 to 55
Phase 2384417 to 85
Phase 3155039 to 114
Phase 4316643 to 103
Not applicable4796032 to 106
Observational889948 to 200

When trials measure it

Half of the primary outcomes that name the Go/No-Go Task are measured within 6 weeks of the start, and the middle half from the first day to 13 weeks. 282 primary outcomes give a duration.

Latest time point of each outcome

  • Within a day137 outcomes, 71 as a primary outcome
  • Up to 4 weeks147 outcomes, 57 as a primary outcome
  • 1 to 3 months207 outcomes, 91 as a primary outcome
  • 3 to 6 months73 outcomes, 22 as a primary outcome
  • 6 to 12 months46 outcomes, 20 as a primary outcome
  • 1 to 2 years21 outcomes, 9 as a primary outcome
  • Over 2 years18 outcomes, 12 as a primary outcome
  • No duration given52 outcomes, 27 as a primary outcome

A test as a primary outcomeOnly in secondary or other outcomes

649 of the 701 outcome measures give a duration. A single visit counts as within a day.

Status, results, interventions and countries

Status

  • Recruiting137 studies, 63 as a primary outcome
  • Not yet recruiting39 studies, 13 as a primary outcome
  • Active, not recruiting30 studies, 18 as a primary outcome
  • Completed374 studies, 169 as a primary outcome
  • Stopped early35 studies, 15 as a primary outcome
  • Status unknown87 studies, 31 as a primary outcome

What they test

  • Behavioral242 studies, 101 as a primary outcome
  • Drug128 studies, 62 as a primary outcome
  • Device132 studies, 45 as a primary outcome
  • Dietary supplement51 studies, 24 as a primary outcome
  • Procedure11 studies, 9 as a primary outcome
  • Diagnostic test11 studies, 5 as a primary outcome
  • Biological4 studies, 2 as a primary outcome
  • Radiation2 studies, 1 as a primary outcome
  • Combination product4 studies, 1 as a primary outcome
  • Other184 studies, 88 as a primary outcome
  • None given40 studies, 21 as a primary outcome

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

Where their sites are

  • United States269 studies, 135 as a primary outcome
  • France45 studies, 17 as a primary outcome
  • United Kingdom42 studies, 9 as a primary outcome
  • Switzerland33 studies, 8 as a primary outcome
  • Canada31 studies, 11 as a primary outcome
  • China28 studies, 16 as a primary outcome
  • Italy28 studies, 11 as a primary outcome
  • Germany25 studies, 14 as a primary outcome
  • Hong Kong17 studies, 5 as a primary outcome
  • Spain16 studies, 7 as a primary outcome
  • Brazil14 studies, 3 as a primary outcome
  • Belgium13 studies, 6 as a primary outcome

49 countries in all. A study with sites in several counts in each; 29 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 studies that name the Go/No-Go Task: 158 of 374, 42%

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

Completed studies that name the Go/No-Go Task and every completed study, by how they reported results
ResultsCompleted studies that name the Go/No-Go TaskEvery completed study
Results on ClinicalTrials.gov and a paper35, 9%776, 10%
Results on ClinicalTrials.gov only44, 12%1,139, 14%
A results paper only79, 21%1,711, 22%
Neither216, 58%4,327, 54%

Tests named in the same studies

The library tests that studies naming the Go/No-Go Task name most often beside it.
  1. 1

    Stroop Color-Word Test117 studies, 52 as a primary outcome

  2. 2

    N-Back Task87 studies, 32 as a primary outcome

  3. 3

    Digit Span Test84 studies, 32 as a primary outcome

  4. 4

    Trail Making Test81 studies, 27 as a primary outcome

  5. 5

    Verbal Fluency52 studies, 24 as a primary outcome

  6. 6

    Verbal Learning51 studies, 27 as a primary outcome

  7. 7

    Affective Go/No-Go48 studies, 18 as a primary outcome

  8. 8

    Continuous Performance Test43 studies, 18 as a primary outcome

  9. 9

    Stop-Signal Task42 studies, 25 as a primary outcome

  10. 10

    Delay Discounting38 studies, 13 as a primary outcome

A test as a primary outcomeOnly in secondary or other outcomes

Compared over time

Studies per start year for the Go/No-Go Task and the tests named with it most. Add or remove tests to compare.
Go/No-Go Task699 studies, 2000 to 2026
01002002000201020202026
Stroop Color-Word Test1,922 studies, 2000 to 2026
01002002000201020202026
N-Back Task787 studies, 2000 to 2026
01002002000201020202026
Digit Span Test1,619 studies, 2000 to 2026
01002002000201020202026

The panel's testThe other tests chosenEvery panel has the same scale. 2026 is partly planned starts.

Show as a table
Registered studies per start year that name each test
Start yearGo/No-Go TaskStroop Color-Word TestN-Back TaskDigit Span Test
20000303
20011302
20022521
20031224
20042804
200501147
20061634
20071131014
20084151019
2009516522
20108291137
201113312026
201213321436
201319422344
201422642549
201524672579
201634853269
201737795182
2018401035485
20194611959110
202032993090
20216215170122
20226016862121
20236719871164
20246418269141
20257719867147
20266419368137

Explore the 702 studies

Filter by condition, phase, sponsor, status, country, intervention, outcome list, size and start year. Each study links to its record on ClinicalTrials.gov.
TestThe Go/No-Go Task

702 studies match. 309 name the Go/No-Go Task in a primary outcome. Median size 60 participants. Median time to the primary outcome: 6 weeks.

Loading 702 studies; the filters turn on when they arrive.

By start year
0204060802000: 0 studies, 0 naming the Go/No-Go Task in a primary outcome20002001: 1 studies, 1 naming the Go/No-Go Task in a primary outcome2002: 2 studies, 1 naming the Go/No-Go Task in a primary outcome2003: 1 studies, 1 naming the Go/No-Go Task in a primary outcome2004: 2 studies, 2 naming the Go/No-Go Task in a primary outcome2005: 0 studies, 0 naming the Go/No-Go Task in a primary outcome20052006: 1 studies, 0 naming the Go/No-Go Task in a primary outcome2007: 1 studies, 0 naming the Go/No-Go Task in a primary outcome2008: 4 studies, 1 naming the Go/No-Go Task in a primary outcome2009: 5 studies, 3 naming the Go/No-Go Task in a primary outcome2010: 8 studies, 1 naming the Go/No-Go Task in a primary outcome20102011: 13 studies, 4 naming the Go/No-Go Task in a primary outcome2012: 13 studies, 6 naming the Go/No-Go Task in a primary outcome2013: 19 studies, 3 naming the Go/No-Go Task in a primary outcome2014: 22 studies, 9 naming the Go/No-Go Task in a primary outcome2015: 24 studies, 13 naming the Go/No-Go Task in a primary outcome20152016: 34 studies, 18 naming the Go/No-Go Task in a primary outcome2017: 37 studies, 13 naming the Go/No-Go Task in a primary outcome2018: 40 studies, 16 naming the Go/No-Go Task in a primary outcome2019: 46 studies, 17 naming the Go/No-Go Task in a primary outcome2020: 32 studies, 18 naming the Go/No-Go Task in a primary outcome20202021: 62 studies, 31 naming the Go/No-Go Task in a primary outcome2022: 60 studies, 27 naming the Go/No-Go Task in a primary outcome2023: 67 studies, 37 naming the Go/No-Go Task in a primary outcome2024: 64 studies, 32 naming the Go/No-Go Task in a primary outcome2025: 77 studies, 28 naming the Go/No-Go Task in a primary outcome20252026: 64 studies, 26 naming the Go/No-Go Task in a primary outcome

2026 is partly planned starts. Not shown: 3 planned to start after 2026.

Show as a table
Matching studies by start year
Start yearStudiesAs a primary outcome
200000
200111
200221
200311
200422
200500
200610
200710
200841
200953
201081
2011134
2012136
2013193
2014229
20152413
20163418
20173713
20184016
20194617
20203218
20216231
20226027
20236737
20246432
20257728
20266426

Library tests named most

  • Go/No-Go Task702 studies, 309 as a primary outcome
  • Stroop Color-Word Test117 studies, 52 as a primary outcome
  • N-Back Task87 studies, 32 as a primary outcome
  • Digit Span Test84 studies, 32 as a primary outcome
  • Trail Making Test81 studies, 27 as a primary outcome
  • Verbal Fluency52 studies, 24 as a primary outcome
  • Verbal Learning51 studies, 27 as a primary outcome
  • Affective Go/No-Go48 studies, 18 as a primary outcome
  • Continuous Performance Test43 studies, 18 as a primary outcome
  • Stop-Signal Task42 studies, 25 as a primary outcome

Largest condition groups

Phases

Participants

Lead sponsor: industry 30, NIH 8, other 664. Interventional 611, observational 91.

As a primary outcomeSecondary or other outcomeThe Go/No-Go Task

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
NCT07907718Start2026PhaseNot applicableConditionsParkinson's diseaseParticipants50Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Trail Making TestPrimary8 weeks
  • Stroop Color-Word TestPrimary8 weeks
  • Go/No-Go TaskPrimary8 weeks
NCT07905430Start2026PhaseNot applicableConditionsOther conditionsParticipants152Lead sponsorOtherStatusRecruitingLibrary tests named
  • Go/No-Go TaskSecondarysame day
NCT07888725Start2026PhaseNot applicableConditionsOther conditionsParticipants60Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Go/No-Go TaskPrimary4 weeks
NCT07872904Start2026PhasePhase 4ConditionsObesity and diabetesParticipants400Lead sponsorOtherStatusRecruitingLibrary tests named
  • Go/No-Go TaskOther outcome13 months
  • Effort for Rewards TaskOther outcome13 months
NCT07871929Start2026PhaseNot applicableConditionsAging, frailty and exercise, Sleep and sleep disordersParticipants240Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Go/No-Go TaskSecondary12 months
NCT07860320Start2026PhaseNot applicableConditionsOther conditionsParticipants30Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Go/No-Go TaskSecondarysame day
  • Go/No-Go Association TaskSecondarysame day
NCT07849504Start2026PhaseNot applicableConditionsOther conditionsParticipants176Lead sponsorOtherStatusCompletedLibrary tests named
  • Go/No-Go TaskSecondary9 weeks
NCT07848477Start2026PhaseNot applicableConditionsDepression and bipolar disorderParticipants60Lead sponsorOtherStatusRecruitingLibrary tests named
  • Verbal LearningPrimary2 weeks
  • Digit Span TestSecondary2 weeks
  • Symbol CodingSecondary2 weeks
  • N-Back TaskSecondary2 weeks
  • Go/No-Go TaskSecondary2 weeks
  • Paired Associate LearningSecondary2 weeks
  • Probabilistic Reversal LearningSecondary2 weeks
  • Mnemonic Similarity TaskSecondary2 weeks
  • Affective Go/No-GoSecondary2 weeks
  • Grid Pattern Span TaskSecondary2 weeks
NCT07845409Start2027PhaseNot applicableConditionsDepression and bipolar disorderParticipants138Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Trail Making TestPrimary10 weeks
  • Go/No-Go TaskPrimary10 weeks
  • Continuous Performance TestPrimary10 weeks
  • AX Continuous Performance TestPrimary10 weeks
  • Monetary Incentive DelayPrimary10 weeks
  • Affective Go/No-GoPrimary10 weeks
NCT07833787Start2025PhaseObservationalConditionsOther conditionsParticipants1,500Lead sponsorOtherStatusRecruitingLibrary tests named
  • Digit Span TestSecondary5 years
  • N-Back TaskSecondarysame day
  • Go/No-Go TaskSecondary5 years
  • Attention Network TestSecondarysame day
NCT07830056Start2025PhasePhase 4ConditionsSleep and sleep disordersParticipants33Lead sponsorOtherStatusRecruitingLibrary tests named
  • N-Back TaskPrimary1 week
  • Go/No-Go TaskPrimary1 week
  • Psychomotor Vigilance TaskPrimary1 week
  • Task Switching TestPrimary1 week
  • Finger Tapping TaskPrimary1 week
  • Balloon RiskSecondary1 week
NCT07800286Start2023PhaseNot applicableConditionsAging, frailty and exerciseParticipants44Lead sponsorOtherStatusCompletedLibrary tests named
  • Go/No-Go TaskPrimary8 weeks
NCT07799584Start2026PhaseNot applicableConditionsMild cognitive impairmentParticipants120Lead sponsorOtherStatusRecruitingLibrary tests named
  • Verbal LearningPrimary6 months
  • Digit Span TestPrimary8 weeks
  • N-Back TaskPrimary8 weeks
  • Go/No-Go TaskPrimary8 weeks
  • Mnemonic Similarity TaskPrimary6 months
NCT07795554Start2026PhaseNot applicableConditionsSchizophrenia and psychosisParticipants60Lead sponsorOtherStatusRecruitingLibrary tests named
  • Go/No-Go TaskSecondary6 weeks
  • Stop-Signal TaskSecondary6 weeks
  • Cue Reactivity TaskSecondary
NCT07792876Start2025PhaseNot applicableConditionsHealthy volunteers, Aging, frailty and exerciseParticipants12Lead sponsorOtherStatusRecruitingLibrary tests named
  • Trail Making TestPrimary5 weeks
  • Go/No-Go TaskPrimary5 weeks
  • Corsi Block-Tapping TestPrimary5 weeks
NCT07791355Start2026PhaseNot applicableConditionsPain and fatigueParticipants25Lead sponsorOtherStatusRecruitingLibrary tests named
  • Stroop Color-Word TestOther outcome9 weeks
  • Go/No-Go TaskOther outcome9 weeks
  • Recognition Memory TestOther outcome9 weeks
NCT07777419Start2026PhaseNot applicableConditionsParkinson's diseaseParticipants20Lead sponsorOtherStatusRecruitingLibrary tests named
  • Stroop Color-Word TestSecondarysame day
  • Verbal FluencyPrimarysame day
  • Go/No-Go TaskSecondarysame day
  • Category FluencyPrimarysame day
NCT07771595Start2026PhasePhase 4ConditionsOther conditionsParticipants40Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Go/No-Go TaskSecondarysame day
  • Affective Go/No-GoSecondarysame day
  • Effort Discounting TaskSecondarysame day
NCT07767617Start2026PhaseNot applicableConditionsADHD, Sleep and sleep disordersParticipants150Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Digit Span TestSecondary6 months
  • Go/No-Go TaskSecondary4 weeks
  • Continuous Performance TestSecondary6 months
  • Stop-Signal TaskSecondary4 weeks
  • Delay DiscountingSecondary6 months
  • AX Continuous Performance TestWording unclear
  • Balloon RiskSecondary4 weeks
  • Beads TaskSecondary6 months
NCT07763977Start2024PhaseNot applicableConditionsAnxiety, PTSD and OCDParticipants60Lead sponsorOtherStatusRecruitingLibrary tests named
  • Go/No-Go TaskPrimary12 weeks
NCT07758257Start2025PhaseNot applicableConditionsStrokeParticipants30Lead sponsorOtherStatusCompletedLibrary tests named
  • Trail Making TestSecondarysame day
  • Go/No-Go TaskSecondarysame day
NCT07743086Start2026PhasePhase 1/2ConditionsCancerParticipants886Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Go/No-Go TaskPrimary5 months
NCT07735923Start2026PhaseNot applicableConditionsSubstance use and addictionParticipants104Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Go/No-Go TaskPrimary6 weeks
  • Cue Reactivity TaskPrimary6 weeks
NCT07725354Start2024PhaseNot applicableConditionsOther conditionsParticipants34Lead sponsorOtherStatusCompletedLibrary tests named
  • Go/No-Go TaskPrimary12 weeks
NCT07698444Start2021PhaseObservationalConditionsStrokeParticipants106Lead sponsorOtherStatusCompletedLibrary tests named
  • Trail Making TestSecondarysame day
  • Go/No-Go TaskSecondarysame day

Page 1 of 29

Questions, answered from the data

How many clinical trials use the Go/No-Go Task?

702 registered studies on ClinicalTrials.gov name it in an outcome measure, 309 of them in a primary outcome.

In which conditions do trials use the Go/No-Go Task?

Most often in substance use and addiction (80), depression and bipolar disorder (79) and ADHD (65).

Do new trials use the Go/No-Go Task more or less?

4.7% of the studies that started in 2021 to 2025 name it, against 4.2% of those that started in 2016 to 2020: a share 11% larger.

Which tests do trials use with the Go/No-Go Task?

The Stroop Color-Word Test (117 studies), the N-Back Task (87 studies) and the Digit Span Test (84 studies).

How many participants do phase 2 trials that use the Go/No-Go Task enroll?

Half of the phase 2 studies that name it enroll 44 participants or fewer, and the middle half enroll 17 to 85. 38 of them give a size.

When do trials measure the Go/No-Go Task?

Half of the primary outcomes that name the Go/No-Go Task are measured within 6 weeks of the start, and the middle half from the first day to 13 weeks. 282 primary outcomes give a duration.

How many completed trials that use the Go/No-Go Task have reported results?

158 of the 374 completed studies that name it, 42%, have reported results: 79 posted them on ClinicalTrials.gov, 114 have a results paper linked to the registry record, and 35 did both. The other 216 show neither. Of all completed studies with a cognitive outcome, 46% have reported results.

More on tests in clinical trials

  • Go/No-Go Task: what it measures, its scores, and a version to try
  • Go/No-Go Game: what it measures, its scores, and a version to try
  • All 101 tests in clinical trials
  • Cognitive tests by condition
  • Every registered study, by test, condition, phase and year

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.

The census counts Go/No-Go Task and Go/No-Go Game as one test family, so this page counts their studies together: 702 studies.

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