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  5. /Delayed Recall Module

Clinical trials data

Delayed Recall Module in clinical trials: 159 registered studies

Every registered study on ClinicalTrials.gov that names Delayed Recall Module 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
159
Name it in a primary outcome, 35%
56 of 159
Against similar tests
Of studies started 2021 to 2025 name it, against 1.1% in 2016 to 2020
0.8%
By year
Median participants per study
116
By phase
Try Delayed Recall ModuleTry the Week Later Game

The conditions it is used in

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

  1. Dementia and Alzheimer's71 studies, 17 as a primary outcome

  2. Mild cognitive impairment14 studies, 7 as a primary outcome

  3. Parkinson's disease9 studies, 2 as a primary outcome

  4. Depression and bipolar disorder9 studies, 4 as a primary outcome

  5. Healthy volunteers8 studies, 6 as a primary outcome

  6. Aging, frailty and exercise8 studies, 5 as a primary outcome

  7. Sleep and sleep disorders7 studies, 0 as a primary outcome

  8. Pain and fatigue7 studies, 1 as a primary outcome

  9. Obesity and diabetes5 studies, 3 as a primary outcome

  10. Schizophrenia and psychosis4 studies, 1 as a primary outcome

  11. Cancer4 studies, 0 as a primary outcome

  12. Anxiety, PTSD and OCD4 studies, 2 as a primary outcome

  13. Brain injury and concussion3 studies, 2 as a primary outcome

  14. Hearing loss3 studies, 2 as a primary outcome

  15. Cardiovascular disease3 studies, 2 as a primary outcome

  16. Stroke2 studies, 2 as a primary outcome

  17. Substance use and addiction2 studies, 1 as a primary outcome

  18. Delirium, surgery and intensive care2 studies, 2 as a primary outcome

  19. Multiple sclerosis1 study, 0 as a primary outcome

  20. ADHD1 study, 0 as a primary outcome

  21. Cognitive impairment and decline1 study, 1 as a primary outcome

  22. COVID-19 and long COVID1 study, 0 as a primary outcome

  23. Epilepsy1 study, 0 as a primary outcome

  24. Other conditions24 studies, 12 as a primary outcome

A test as a primary outcomeOnly in secondary or other outcomes

How often it is a primary outcome

Delayed Recall Module is a primary outcome in 35% of its studies. Across the 15 episodic memory tests with a page here, the median is 41%.

  1. Face-name Memory Task53% of 51 studies

  2. Selective Reminding Task49% of 183 studies

  3. Mnemonic Similarity Task42% of 62 studies

  4. Short Story Recall41% of 315 studies

  5. Hidden Path Learning41% of 66 studies

  6. Verbal Learning39% of 1,832 studies

  7. Complex Figure Copy and Recall39% of 276 studies

  8. Category Fluency37% of 623 studies

  9. Picture Order Memory Test35% of 144 studies

  10. Delayed Recall Module35% of 159 studies

  11. Paired Associate Learning34% of 204 studies

  12. Delayed Match-to-Sample32% of 69 studies

Studies by start year

0.8% of the registered studies that started in 2021 to 2025 name it, against 1.1% of those that started in 2016 to 2020. 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: 1 studies, 0 with a test as a primary outcome2004: 2 studies, 1 with a test as a primary outcome2005: 1 studies, 1 with a test as a primary outcome20052006: 1 studies, 0 with a test as a primary outcome2007: 3 studies, 2 with a test as a primary outcome2008: 2 studies, 0 with a test as a primary outcome2009: 3 studies, 1 with a test as a primary outcome2010: 7 studies, 3 with a test as a primary outcome20102011: 4 studies, 0 with a test as a primary outcome2012: 5 studies, 2 with a test as a primary outcome2013: 2 studies, 1 with a test as a primary outcome2014: 5 studies, 3 with a test as a primary outcome2015: 8 studies, 2 with a test as a primary outcome20152016: 13 studies, 5 with a test as a primary outcome2017: 13 studies, 5 with a test as a primary outcome2018: 15 studies, 7 with a test as a primary outcome2019: 4 studies, 1 with a test as a primary outcome2020: 4 studies, 0 with a test as a primary outcome20202021: 17 studies, 7 with a test as a primary outcome2022: 9 studies, 3 with a test as a primary outcome2023: 6 studies, 3 with a test as a primary outcome2024: 11 studies, 4 with a test as a primary outcome2025: 12 studies, 2 with a test as a primary outcome20252026: 10 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
200310
200421
200511
200610
200732
200820
200931
201073
201140
201252
201321
201453
201582
2016135
2017135
2018157
201941
202040
2021177
202293
202363
2024114
2025122
2026102

Phases and study sizes

By phase

  • Early phase 12 studies, 1 as a primary outcome
  • Phase 17 studies, 3 as a primary outcome
  • Phase 1/23 studies, 0 as a primary outcome
  • Phase 239 studies, 6 as a primary outcome
  • Phase 2/33 studies, 3 as a primary outcome
  • Phase 328 studies, 7 as a primary outcome
  • Phase 46 studies, 2 as a primary outcome
  • Not applicable63 studies, 29 as a primary outcome
  • Observational8 studies, 5 as a primary outcome

Participants per study

1020501002005001,0002,000
  • Phase 2214 median, 81 to 350
  • Phase 31,040 median, 584 to 1,564
  • Not applicable61 median, 40 to 117
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 Delayed Recall Module, by phase
PhaseStudies with a sizeMedianMiddle half
Phase 23921481 to 350
Phase 3281,040584 to 1,564
Not applicable626140 to 117

When trials measure it

Half of the primary outcomes that name Delayed Recall Module are measured within 12 weeks of the start, and the middle half from 1 week to 12 months. 54 primary outcomes give a duration.

Latest time point of each outcome

  • Within a day26 outcomes, 11 as a primary outcome
  • Up to 4 weeks19 outcomes, 9 as a primary outcome
  • 1 to 3 months31 outcomes, 14 as a primary outcome
  • 3 to 6 months22 outcomes, 5 as a primary outcome
  • 6 to 12 months13 outcomes, 2 as a primary outcome
  • 1 to 2 years37 outcomes, 10 as a primary outcome
  • Over 2 years8 outcomes, 3 as a primary outcome
  • No duration given3 outcomes, 2 as a primary outcome

A test as a primary outcomeOnly in secondary or other outcomes

156 of the 159 outcome measures give a duration. A single visit counts as within a day.

Status, results, interventions and countries

Status

  • Recruiting20 studies, 5 as a primary outcome
  • Not yet recruiting6 studies, 1 as a primary outcome
  • Active, not recruiting7 studies, 3 as a primary outcome
  • Completed95 studies, 37 as a primary outcome
  • Stopped early25 studies, 8 as a primary outcome
  • Status unknown6 studies, 2 as a primary outcome

What they test

  • Behavioral12 studies, 6 as a primary outcome
  • Drug78 studies, 20 as a primary outcome
  • Device13 studies, 6 as a primary outcome
  • Dietary supplement32 studies, 9 as a primary outcome
  • Procedure3 studies, 0 as a primary outcome
  • Biological5 studies, 1 as a primary outcome
  • Other30 studies, 13 as a primary outcome
  • None given3 studies, 3 as a primary outcome

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

Where their sites are

  • United States90 studies, 31 as a primary outcome
  • United Kingdom58 studies, 20 as a primary outcome
  • Canada46 studies, 11 as a primary outcome
  • Spain38 studies, 9 as a primary outcome
  • Germany36 studies, 9 as a primary outcome
  • France34 studies, 8 as a primary outcome
  • Japan32 studies, 6 as a primary outcome
  • Australia29 studies, 4 as a primary outcome
  • Italy29 studies, 5 as a primary outcome
  • Poland26 studies, 5 as a primary outcome
  • Sweden19 studies, 2 as a primary outcome
  • Belgium18 studies, 3 as a primary outcome

54 countries in all. A study with sites in several counts in each; 4 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 Delayed Recall Module: 65 of 95, 68%

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

Completed studies that name Delayed Recall Module and every completed study, by how they reported results
ResultsCompleted studies that name Delayed Recall ModuleEvery completed study
Results on ClinicalTrials.gov and a paper29, 31%776, 10%
Results on ClinicalTrials.gov only16, 17%1,139, 14%
A results paper only20, 21%1,711, 22%
Neither30, 32%4,327, 54%

Tests named in the same studies

The library tests that studies naming Delayed Recall Module name most often beside it.
  1. 1

    Trail Making Test33 studies, 18 as a primary outcome

  2. 2

    Cancellation Test33 studies, 7 as a primary outcome

  3. 3

    Verbal Fluency32 studies, 8 as a primary outcome

  4. 4

    Verbal Learning31 studies, 19 as a primary outcome

  5. 5

    Category Fluency28 studies, 10 as a primary outcome

  6. 6

    Choice Reaction Time27 studies, 17 as a primary outcome

  7. 7

    Symbol Coding23 studies, 11 as a primary outcome

  8. 8

    Rapid Visual Information Processing21 studies, 8 as a primary outcome

  9. 9

    Digit Span Test20 studies, 8 as a primary outcome

  10. 10

    Simple Reaction Time18 studies, 10 as a primary outcome

A test as a primary outcomeOnly in secondary or other outcomes

Compared over time

Studies per start year for Delayed Recall Module and the tests named with it most. Add or remove tests to compare.
Delayed Recall Module158 studies, 2000 to 2026
01252502000201020202026
Trail Making Test2,281 studies, 2000 to 2026
01252502000201020202026
Cancellation Test253 studies, 2000 to 2026
01252502000201020202026
Verbal Fluency1,737 studies, 2000 to 2026
01252502000201020202026

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 yearDelayed Recall ModuleTrail Making TestCancellation TestVerbal Fluency
20000201
20010001
20020303
20031814
200421009
2005114119
200611439
2007321122
2008217318
2009329529
2010732429
2011447836
2012544634
2013260558
2014566759
20158851079
2016131031685
2017131221693
20181511712107
2019415518121
202041221590
20211717225131
2022918816123
2023622818147
20241121122130
20251221020167
20261020121133

Explore the 159 studies

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

159 studies match. 56 name Delayed Recall Module in a primary outcome. Median size 116 participants. Median time to the primary outcome: 12 weeks.

Loading 159 studies; the filters turn on when they arrive.

By start year
051015202000: 0 studies, 0 naming Delayed Recall Module in a primary outcome20002001: 0 studies, 0 naming Delayed Recall Module in a primary outcome2002: 0 studies, 0 naming Delayed Recall Module in a primary outcome2003: 1 studies, 0 naming Delayed Recall Module in a primary outcome2004: 2 studies, 1 naming Delayed Recall Module in a primary outcome2005: 1 studies, 1 naming Delayed Recall Module in a primary outcome20052006: 1 studies, 0 naming Delayed Recall Module in a primary outcome2007: 3 studies, 2 naming Delayed Recall Module in a primary outcome2008: 2 studies, 0 naming Delayed Recall Module in a primary outcome2009: 3 studies, 1 naming Delayed Recall Module in a primary outcome2010: 7 studies, 3 naming Delayed Recall Module in a primary outcome20102011: 4 studies, 0 naming Delayed Recall Module in a primary outcome2012: 5 studies, 2 naming Delayed Recall Module in a primary outcome2013: 2 studies, 1 naming Delayed Recall Module in a primary outcome2014: 5 studies, 3 naming Delayed Recall Module in a primary outcome2015: 8 studies, 2 naming Delayed Recall Module in a primary outcome20152016: 13 studies, 5 naming Delayed Recall Module in a primary outcome2017: 13 studies, 5 naming Delayed Recall Module in a primary outcome2018: 15 studies, 7 naming Delayed Recall Module in a primary outcome2019: 4 studies, 1 naming Delayed Recall Module in a primary outcome2020: 4 studies, 0 naming Delayed Recall Module in a primary outcome20202021: 17 studies, 7 naming Delayed Recall Module in a primary outcome2022: 9 studies, 3 naming Delayed Recall Module in a primary outcome2023: 6 studies, 3 naming Delayed Recall Module in a primary outcome2024: 11 studies, 4 naming Delayed Recall Module in a primary outcome2025: 12 studies, 2 naming Delayed Recall Module in a primary outcome20252026: 10 studies, 2 naming Delayed Recall Module in a primary outcome

2026 is partly planned starts. Not shown: 1 that started before 2000.

Show as a table
Matching studies by start year
Start yearStudiesAs a primary outcome
200000
200100
200200
200310
200421
200511
200610
200732
200820
200931
201073
201140
201252
201321
201453
201582
2016135
2017135
2018157
201941
202040
2021177
202293
202363
2024114
2025122
2026102

Library tests named most

  • Delayed Recall Module159 studies, 56 as a primary outcome
  • Trail Making Test33 studies, 18 as a primary outcome
  • Cancellation Test33 studies, 7 as a primary outcome
  • Verbal Fluency32 studies, 8 as a primary outcome
  • Verbal Learning31 studies, 19 as a primary outcome
  • Category Fluency28 studies, 10 as a primary outcome
  • Choice Reaction Time27 studies, 17 as a primary outcome
  • Symbol Coding23 studies, 11 as a primary outcome
  • Rapid Visual Information Processing21 studies, 8 as a primary outcome
  • Digit Span Test20 studies, 8 as a primary outcome

Largest condition groups

Phases

Participants

Lead sponsor: industry 73, NIH 1, other 85. Interventional 151, observational 8.

As a primary outcomeSecondary or other outcomeDelayed Recall Module

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
NCT07878130Start2026PhasePhase 2ConditionsSubstance use and addictionParticipants100Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Verbal LearningSecondary13 weeks
  • Digit Span TestSecondarysame day
  • Delayed Recall ModuleSecondary13 weeks
NCT07842146Start2026PhaseNot applicableConditionsDementia and Alzheimer's, Mild cognitive impairmentParticipants60Lead sponsorOtherStatusRecruitingLibrary tests named
  • Verbal FluencySecondary11 months
  • Symbol CodingSecondary11 months
  • Category FluencySecondary11 months
  • Delayed Recall ModuleSecondary11 months
NCT07757529Start2026PhaseNot applicableConditionsOther conditionsParticipants64Lead sponsorIndustryStatusRecruitingLibrary tests named
  • Stroop Color-Word TestPrimary8 weeks
  • Choice Reaction TimePrimary8 weeks
  • Delayed Recall ModulePrimary8 weeks
NCT07752329Start2026PhaseNot applicableConditionsPain and fatigueParticipants70Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Stroop Color-Word TestSecondary6 weeks
  • Choice Reaction TimePrimary6 weeks
  • Simple Reaction TimePrimary6 weeks
  • Rapid Visual Information ProcessingSecondary6 weeks
  • Delayed Recall ModuleSecondary6 weeks
  • Finger Tapping TaskSecondary6 weeks
  • Fitts Pointing TaskSecondary6 weeks
  • Multiple Object TrackingSecondary6 weeks
NCT07747181Start2026PhaseNot applicableConditionsSchizophrenia and psychosisParticipants135Lead sponsorOtherStatusRecruitingLibrary tests named
  • Trail Making TestSecondary13 weeks
  • Verbal FluencyPrimary13 weeks
  • Digit Span TestSecondary13 weeks
  • Symbol CodingSecondary13 weeks
  • Short Story RecallSecondary13 weeks
  • Cancellation TestSecondary13 weeks
  • Delayed Recall ModuleSecondary13 weeks
NCT07650318Start2026PhaseNot applicableConditionsMild cognitive impairment, Obesity and diabetesParticipants40Lead sponsorOtherStatusRecruitingLibrary tests named
  • Digit Span TestSecondary6 months
  • Category FluencySecondary6 months
  • Picture Naming TestSecondary6 months
  • Short Story RecallSecondary6 months
  • Delayed Recall ModuleSecondary6 months
NCT07642726Start2018PhaseObservationalConditionsDementia and Alzheimer's, Aging, frailty and exerciseParticipants276Lead sponsorOtherStatusCompletedLibrary tests named
  • Trail Making TestPrimary12 months
  • Verbal FluencySecondary12 months
  • Delayed Recall ModuleSecondary12 months
NCT07626567Start2026PhaseObservationalConditionsDelirium, surgery and intensive care, Cardiovascular diseaseParticipants500Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Trail Making TestPrimary1 week
  • Verbal FluencyPrimary1 week
  • Delayed Recall ModulePrimary1 week
NCT07550140Start2026PhaseNot applicableConditionsDepression and bipolar disorder, Sleep and sleep disorders, Anxiety, PTSD and OCDParticipants60Lead sponsorOtherStatusRecruitingLibrary tests named
  • Verbal LearningSecondary12 weeks
  • Delayed Recall ModuleSecondary12 weeks
NCT07392723Start2025PhasePhase 2ConditionsDementia and Alzheimer's, Aging, frailty and exerciseParticipants20Lead sponsorOtherStatusRecruitingLibrary tests named
  • Trail Making TestSecondary6 months
  • Digit Span TestSecondary6 months
  • Category FluencySecondary6 months
  • Delayed Recall ModuleSecondary6 months
NCT07385937Start2026PhaseNot applicableConditionsDementia and Alzheimer's, Mild cognitive impairmentParticipants150Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Trail Making TestSecondary18 months
  • Verbal FluencySecondary18 months
  • Digit Span TestSecondary18 months
  • Category FluencySecondary18 months
  • Clock Drawing TaskSecondary18 months
  • Cancellation TestSecondary18 months
  • Delayed Recall ModuleSecondary18 months
NCT07251023Start2025PhasePhase 3ConditionsDementia and Alzheimer'sParticipants450Lead sponsorIndustryStatusRecruitingLibrary tests named
  • Delayed Recall ModuleOther outcome12 months
NCT07231146Start2025PhaseNot applicableConditionsHealthy volunteersParticipants48Lead sponsorOtherStatusRecruitingLibrary tests named
  • Continuous Performance TestPrimarysame day
  • Eriksen Flanker TaskPrimarysame day
  • Corsi Block-Tapping TestPrimarysame day
  • Delayed Recall ModulePrimarysame day
NCT07159854Start2025PhaseNot applicableConditionsCancerParticipants60Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Trail Making TestSecondary5 weeks
  • Selective Reminding TaskSecondary5 weeks
  • Delayed Recall ModuleSecondary5 weeks
NCT07119788Start2025PhaseNot applicableConditionsOther conditionsParticipants90Lead sponsorOtherStatusRecruitingLibrary tests named
  • Verbal LearningPrimarysame day
  • Task Switching TestSecondarysame day
  • Matrix ReasoningOther outcomesame day
  • Corsi Block-Tapping TestSecondarysame day
  • Delayed Recall ModuleSecondarysame day
  • Attention Network TestSecondarysame day
NCT07047105Start2025PhaseNot applicableConditionsPain and fatigueParticipants57Lead sponsorOtherStatusCompletedLibrary tests named
  • Stroop Color-Word TestSecondarysame day
  • Choice Reaction TimePrimarysame day
  • Simple Reaction TimePrimarysame day
  • Rapid Visual Information ProcessingPrimarysame day
  • Delayed Recall ModuleSecondarysame day
  • Finger Tapping TaskSecondarysame day
NCT07033494Start2025PhasePhase 2ConditionsDementia and Alzheimer'sParticipants340Lead sponsorIndustryStatusRecruitingLibrary tests named
  • Delayed Recall ModuleSecondary23 months
NCT07021339Start2024PhasePhase 3ConditionsCancerParticipants178Lead sponsorOtherStatusRecruitingLibrary tests named
  • Verbal LearningSecondary12 months
  • Verbal FluencySecondary12 months
  • Digit Span TestSecondary12 months
  • Delayed Recall ModuleSecondary12 months
NCT06900452Start2025PhaseNot applicableConditionsOther conditionsParticipants52Lead sponsorOtherStatusRecruitingLibrary tests named
  • Verbal LearningPrimarysame day
  • N-Back TaskSecondarysame day
  • Go/No-Go TaskSecondarysame day
  • Task Switching TestSecondarysame day
  • Matrix ReasoningSecondarysame day
  • Corsi Block-Tapping TestSecondarysame day
  • Delayed Recall ModuleSecondarysame day
  • Attention Network TestSecondarysame day
NCT06846827Start2023PhaseNot applicableConditionsOther conditionsParticipants80Lead sponsorOtherStatusCompletedLibrary tests named
  • Verbal LearningPrimary12 weeks
  • N-Back TaskPrimary12 weeks
  • Task Switching TestPrimary12 weeks
  • Corsi Block-Tapping TestPrimary12 weeks
  • Delayed Recall ModulePrimary12 weeks
  • Finger Tapping TaskPrimary12 weeks
  • Spatial Working MemoryPrimary12 weeks
NCT06796712Start2025PhaseNot applicableConditionsDepression and bipolar disorder, Anxiety, PTSD and OCDParticipants55Lead sponsorOtherStatusCompleted

Paper

Library tests named
  • Verbal LearningSecondary12 weeks
  • Delayed Recall ModuleSecondary12 weeks
NCT06780774Start2025PhaseNot applicableConditionsSleep and sleep disordersParticipants90Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Choice Reaction TimePrimary4 weeks
  • Rapid Visual Information ProcessingPrimary4 weeks
  • Delayed Recall ModuleSecondary4 weeks
NCT06709014Start2025PhasePhase 3ConditionsDementia and Alzheimer'sParticipants760Lead sponsorIndustryStatusActive, not recruitingLibrary tests named
  • Cancellation TestPrimary18 months
  • Delayed Recall ModulePrimary18 months
  • Free Recall TaskPrimary18 months
NCT06685146Start2024PhaseNot applicableConditionsOther conditionsParticipants15Lead sponsorOtherStatusCompletedLibrary tests named
  • Verbal FluencyOther outcomesame day
  • Delayed Recall ModuleOther outcomesame day
NCT06657274Start2024PhaseNot applicableConditionsMild cognitive impairment, Parkinson's diseaseParticipants60Lead sponsorOtherStatusRecruitingLibrary tests named
  • Stroop Color-Word TestSecondary13 weeks
  • Verbal FluencySecondary13 weeks
  • Category FluencySecondary13 weeks
  • Complex Figure Copy and RecallSecondary13 weeks
  • Matrix ReasoningSecondary13 weeks
  • Selective Reminding TaskPrimary13 weeks
  • Delayed Recall ModulePrimary13 weeks

Page 1 of 7

Questions, answered from the data

How many clinical trials use Delayed Recall Module?

159 registered studies on ClinicalTrials.gov name it in an outcome measure, 56 of them in a primary outcome.

In which conditions do trials use Delayed Recall Module?

Most often in dementia and Alzheimer's disease (71), mild cognitive impairment (14) and Parkinson's disease (9).

Do new trials use Delayed Recall Module more or less?

0.8% of the studies that started in 2021 to 2025 name it, against 1.1% of those that started in 2016 to 2020: a share 29% smaller.

Which tests do trials use with Delayed Recall Module?

The Trail Making Test (33 studies), the Cancellation Test (33 studies) and Verbal Fluency (32 studies).

How many participants do phase 2 trials that use Delayed Recall Module enroll?

Half of the phase 2 studies that name it enroll 214 participants or fewer, and the middle half enroll 81 to 350. 39 of them give a size.

When do trials measure Delayed Recall Module?

Half of the primary outcomes that name Delayed Recall Module are measured within 12 weeks of the start, and the middle half from 1 week to 12 months. 54 primary outcomes give a duration.

How many completed trials that use Delayed Recall Module have reported results?

65 of the 95 completed studies that name it, 68%, have reported results: 45 posted them on ClinicalTrials.gov, 49 have a results paper linked to the registry record, and 29 did both. The other 30 show neither. Of all completed studies with a cognitive outcome, 46% have reported results.

More on tests in clinical trials

  • Delayed Recall Module: what it measures, its scores, and a version to try
  • Week Later 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 Delayed Recall Module and Week Later Game as one test family, so this page counts their studies together: 159 studies.

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