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  5. /Serial Naming Task

Clinical trials data

Serial Naming Task in clinical trials: 22 registered studies

Every registered study on ClinicalTrials.gov that names the Serial Naming 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
22
Name it in a primary outcome, 32%
7 of 22
Against similar tests
Of studies started 2021 to 2025 name it, against 0.2% in 2016 to 2020
0.1%
By year
Median participants per study
60
By phase
Try the Serial Naming Task

The conditions it is used in

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

  1. Depression and bipolar disorder1 study, 1 as a primary outcome

  2. ADHD1 study, 0 as a primary outcome

  3. Autism1 study, 1 as a primary outcome

  4. Anxiety, PTSD and OCD1 study, 1 as a primary outcome

  5. Other conditions19 studies, 5 as a primary outcome

A test as a primary outcomeOnly in secondary or other outcomes

How often it is a primary outcome

The Serial Naming Task is a primary outcome in 32% of its studies. Across the 5 language tests with a page here, the median is 33%.

  1. Picture Naming Test43% of 466 studies

  2. Vocabulary Test37% of 199 studies

  3. Token Commands Task33% of 36 studies

  4. Lexical Decision Task32% of 22 studies

  5. Serial Naming Task32% of 22 studies

Studies by start year

0.1% of the registered studies that started in 2021 to 2025 name it, against 0.2% of those that started in 2016 to 2020. 2026 is partly planned starts.
02000: 0 studies, 0 with a test as a primary outcome20002001: 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: 0 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: 1 studies, 0 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: 0 studies, 0 with a test as a primary outcome2014: 1 studies, 1 with a test as a primary outcome2015: 0 studies, 0 with a test as a primary outcome20152016: 2 studies, 0 with a test as a primary outcome2017: 2 studies, 1 with a test as a primary outcome2018: 2 studies, 1 with a test as a primary outcome2019: 0 studies, 0 with a test as a primary outcome2020: 2 studies, 0 with a test as a primary outcome20202021: 2 studies, 1 with a test as a primary outcome2022: 0 studies, 0 with a test as a primary outcome2023: 2 studies, 1 with a test as a primary outcome2024: 1 studies, 0 with a test as a primary outcome2025: 1 studies, 1 with a test as a primary outcome20252026: 5 studies, 1 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
200400
200500
200600
200700
200800
200910
201010
201100
201200
201300
201411
201500
201620
201721
201821
201900
202020
202121
202200
202321
202410
202511
202651

Phases and study sizes

By phase

  • Phase 21 studies, 1 as a primary outcome
  • Phase 2/31 studies, 0 as a primary outcome
  • Not applicable18 studies, 5 as a primary outcome
  • Observational2 studies, 1 as a primary outcome

Participants per study

102050100
  • Not applicable60 median, 40 to 93
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 Serial Naming Task, by phase
PhaseStudies with a sizeMedianMiddle half
Not applicable186040 to 93

When trials measure it

Latest time point of each outcome

  • Within a day2 outcomes, 1 as a primary outcome
  • Up to 4 weeks5 outcomes, 2 as a primary outcome
  • 1 to 3 months6 outcomes, 0 as a primary outcome
  • 3 to 6 months3 outcomes, 2 as a primary outcome
  • 6 to 12 months1 outcomes, 1 as a primary outcome
  • Over 2 years3 outcomes, 1 as a primary outcome
  • No duration given2 outcomes, 0 as a primary outcome

A test as a primary outcomeOnly in secondary or other outcomes

20 of the 22 outcome measures give a duration. A single visit counts as within a day.

Status, results, interventions and countries

Status

  • Recruiting3 studies, 1 as a primary outcome
  • Not yet recruiting4 studies, 1 as a primary outcome
  • Completed6 studies, 3 as a primary outcome
  • Status unknown9 studies, 2 as a primary outcome

What they test

  • Behavioral11 studies, 4 as a primary outcome
  • Drug2 studies, 1 as a primary outcome
  • Device7 studies, 1 as a primary outcome
  • Dietary supplement1 studies, 0 as a primary outcome
  • Diagnostic test1 studies, 1 as a primary outcome
  • Other4 studies, 1 as a primary outcome
  • None given1 studies, 0 as a primary outcome

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

Where their sites are

  • Italy9 studies, 1 as a primary outcome
  • United States4 studies, 2 as a primary outcome
  • Canada2 studies, 1 as a primary outcome
  • Germany1 studies, 0 as a primary outcome
  • Hong Kong1 studies, 1 as a primary outcome
  • Hungary1 studies, 1 as a primary outcome
  • Iran1 studies, 0 as a primary outcome
  • Puerto Rico1 studies, 0 as a primary outcome
  • Switzerland1 studies, 0 as a primary outcome

9 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 studies that name the Serial Naming Task: 3 of 6, 50%

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

Completed studies that name the Serial Naming Task and every completed study, by how they reported results
ResultsCompleted studies that name the Serial Naming TaskEvery completed study
Results on ClinicalTrials.gov and a paper1, 17%776, 10%
Results on ClinicalTrials.gov only1, 17%1,139, 14%
A results paper only1, 17%1,711, 22%
Neither3, 50%4,327, 54%

Tests named in the same studies

The library tests that studies naming the Serial Naming Task name most often beside it.
  1. 1

    Digit Span Test6 studies, 0 as a primary outcome

  2. 2

    Rhythm Discrimination Task4 studies, 0 as a primary outcome

  3. 3

    Lexical Decision Task3 studies, 2 as a primary outcome

  4. 4

    N-Back Task3 studies, 1 as a primary outcome

  5. 5

    Verbal Fluency3 studies, 1 as a primary outcome

  6. 6

    Continuous Performance Test2 studies, 1 as a primary outcome

  7. 7

    Arithmetic Fluency Task1 study, 1 as a primary outcome

  8. 8

    Balloon Risk1 study, 1 as a primary outcome

  9. 9

    Category Fluency1 study, 1 as a primary outcome

  10. 10

    Choice Reaction Time1 study, 1 as a primary outcome

A test as a primary outcomeOnly in secondary or other outcomes

Compared over time

Studies per start year for the Serial Naming Task and the tests named with it most. Add or remove tests to compare.
Serial Naming Task22 studies, 2000 to 2026
01002002000201020202026
Digit Span Test1,619 studies, 2000 to 2026
01002002000201020202026
Lexical Decision Task22 studies, 2000 to 2026
01002002000201020202026
N-Back Task787 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 yearSerial Naming TaskDigit Span TestLexical Decision TaskN-Back Task
20000300
20010200
20020102
20030402
20040400
20050714
20060403
2007014210
2008019010
200912205
2010137011
2011026020
2012036014
2013044123
2014149025
2015079125
2016269232
2017282251
2018285054
20190110159
2020290330
20212122170
20220121162
20232164071
20241141369
20251147267
20265137268

Explore the 22 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 Serial Naming Task

22 studies match. 7 name the Serial Naming Task in a primary outcome. Median size 60 participants. Median time to the primary outcome: 5 months.

Loading 22 studies; the filters turn on when they arrive.

By start year
02462000: 0 studies, 0 naming the Serial Naming Task in a primary outcome20002001: 0 studies, 0 naming the Serial Naming Task in a primary outcome2002: 0 studies, 0 naming the Serial Naming Task in a primary outcome2003: 0 studies, 0 naming the Serial Naming Task in a primary outcome2004: 0 studies, 0 naming the Serial Naming Task in a primary outcome2005: 0 studies, 0 naming the Serial Naming Task in a primary outcome20052006: 0 studies, 0 naming the Serial Naming Task in a primary outcome2007: 0 studies, 0 naming the Serial Naming Task in a primary outcome2008: 0 studies, 0 naming the Serial Naming Task in a primary outcome2009: 1 studies, 0 naming the Serial Naming Task in a primary outcome2010: 1 studies, 0 naming the Serial Naming Task in a primary outcome20102011: 0 studies, 0 naming the Serial Naming Task in a primary outcome2012: 0 studies, 0 naming the Serial Naming Task in a primary outcome2013: 0 studies, 0 naming the Serial Naming Task in a primary outcome2014: 1 studies, 1 naming the Serial Naming Task in a primary outcome2015: 0 studies, 0 naming the Serial Naming Task in a primary outcome20152016: 2 studies, 0 naming the Serial Naming Task in a primary outcome2017: 2 studies, 1 naming the Serial Naming Task in a primary outcome2018: 2 studies, 1 naming the Serial Naming Task in a primary outcome2019: 0 studies, 0 naming the Serial Naming Task in a primary outcome2020: 2 studies, 0 naming the Serial Naming Task in a primary outcome20202021: 2 studies, 1 naming the Serial Naming Task in a primary outcome2022: 0 studies, 0 naming the Serial Naming Task in a primary outcome2023: 2 studies, 1 naming the Serial Naming Task in a primary outcome2024: 1 studies, 0 naming the Serial Naming Task in a primary outcome2025: 1 studies, 1 naming the Serial Naming Task in a primary outcome20252026: 5 studies, 1 naming the Serial Naming Task 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
200400
200500
200600
200700
200800
200910
201010
201100
201200
201300
201411
201500
201620
201721
201821
201900
202020
202121
202200
202321
202410
202511
202651

Library tests named most

  • Serial Naming Task22 studies, 7 as a primary outcome
  • Digit Span Test6 studies, 0 as a primary outcome
  • Rhythm Discrimination Task4 studies, 0 as a primary outcome
  • Lexical Decision Task3 studies, 2 as a primary outcome
  • N-Back Task3 studies, 1 as a primary outcome
  • Verbal Fluency3 studies, 1 as a primary outcome
  • Continuous Performance Test2 studies, 1 as a primary outcome
  • Arithmetic Fluency Task1 study, 1 as a primary outcome
  • Balloon Risk1 study, 1 as a primary outcome
  • Category Fluency1 study, 1 as a primary outcome

Conditions

Phases

Participants

Lead sponsor: industry 1, other 21. Interventional 20, observational 2.

As a primary outcomeSecondary or other outcomeThe Serial Naming 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
NCT07899671Start2026PhaseNot applicableConditionsOther conditionsParticipants160Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Serial Naming TaskOther outcome
NCT07781761Start2026PhaseNot applicableConditionsOther conditionsParticipants160Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Serial Naming TaskSecondary6 months
NCT07546292Start2026PhaseNot applicableConditionsOther conditionsParticipants60Lead sponsorOtherStatusRecruitingLibrary tests named
  • Lexical Decision TaskPrimary8 weeks
  • Serial Naming TaskSecondary8 weeks
NCT07544199Start2026PhaseObservationalConditionsOther conditionsParticipants300Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Serial Naming TaskPrimary6 months
NCT07309302Start2025PhaseNot applicableConditionsDepression and bipolar disorder, Anxiety, PTSD and OCDParticipants64Lead sponsorOtherStatusRecruitingLibrary tests named
  • Trail Making TestPrimary5 months
  • Stroop Color-Word TestPrimary5 months
  • Verbal LearningPrimary5 months
  • Verbal FluencyPrimary5 months
  • Symbol CodingPrimary5 months
  • Continuous Performance TestPrimary5 months
  • Category FluencyPrimary5 months
  • Eriksen Flanker TaskPrimary5 months
  • Balloon RiskPrimary5 months
  • Emotional Stroop TaskPrimary5 months
  • Visual Search TestPrimary5 months
  • Serial Naming TaskPrimary5 months
NCT07247253Start2017PhaseNot applicableConditionsOther conditionsParticipants71Lead sponsorOtherStatusCompletedLibrary tests named
  • Serial Naming TaskPrimary10 months
NCT06288971Start2024PhaseNot applicableConditionsOther conditionsParticipants40Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Verbal FluencySecondary3 years
  • Digit Span TestSecondary3 years
  • N-Back TaskSecondary3 years
  • Go/No-Go TaskSecondary3 years
  • Continuous Performance TestSecondary3 years
  • Corsi Block-Tapping TestSecondary3 years
  • Serial Naming TaskSecondary3 years
NCT06186882Start2023PhaseNot applicableConditionsOther conditionsParticipants60Lead sponsorOtherStatusStatus unknownLibrary tests named
  • Serial Naming TaskPrimary3 years
NCT06127550Start2026PhaseNot applicableConditionsOther conditionsParticipants100Lead sponsorOtherStatusRecruitingLibrary tests named
  • Serial Naming TaskSecondary6 weeks
NCT05972200Start2023PhaseNot applicableConditionsOther conditionsParticipants36Lead sponsorOtherStatusStatus unknownLibrary tests named
  • Serial Naming TaskSecondary
NCT05137353Start2021PhaseNot applicableConditionsOther conditionsParticipants51Lead sponsorOtherStatusCompletedLibrary tests named
  • Choice Reaction TimePrimarysame day
  • Lexical Decision TaskPrimarysame day
  • Serial Naming TaskPrimarysame day
NCT04995991Start2018PhaseNot applicableConditionsOther conditionsParticipants60Lead sponsorOtherStatusStatus unknownLibrary tests named
  • Digit Span TestSecondary5 weeks
  • Serial Naming TaskSecondary5 weeks
  • Rhythm Discrimination TaskSecondary5 weeks
NCT04995471Start2020PhaseNot applicableConditionsOther conditionsParticipants50Lead sponsorOtherStatusStatus unknown

Paper

Library tests named
  • Digit Span TestSecondary5 weeks
  • Serial Naming TaskSecondary5 weeks
  • Rhythm Discrimination TaskSecondary5 weeks
NCT04989088Start2021PhaseNot applicableConditionsOther conditionsParticipants40Lead sponsorOtherStatusStatus unknownLibrary tests named
  • Digit Span TestSecondarysame day
  • Serial Naming TaskSecondarysame day
  • Rhyme Judgment TaskPrimarysame day
NCT04287530Start2020PhaseNot applicableConditionsOther conditionsParticipants125Lead sponsorOtherStatusStatus unknownLibrary tests named
  • Serial Naming TaskSecondary13 weeks
NCT04244578Start2016PhaseNot applicableConditionsOther conditionsParticipants28Lead sponsorOtherStatusCompletedLibrary tests named
  • N-Back TaskSecondary4 weeks
  • Lexical Decision TaskSecondary4 weeks
  • Serial Naming TaskSecondary4 weeks
  • Spatial N-Back TaskSecondary4 weeks
NCT03261076Start2018PhaseNot applicableConditionsOther conditionsParticipants192Lead sponsorOtherStatusStatus unknownLibrary tests named
  • Arithmetic Fluency TaskPrimary4 weeks
  • Serial Naming TaskPrimary4 weeks
NCT03119402Start2017PhaseNot applicableConditionsOther conditionsParticipants20Lead sponsorOtherStatusStatus unknownLibrary tests named
  • Digit Span TestSecondary2 weeks
  • Serial Naming TaskSecondary2 weeks
  • Rhythm Discrimination TaskSecondary2 weeks
NCT02791841Start2016PhaseNot applicableConditionsOther conditionsParticipants33Lead sponsorOtherStatusStatus unknown

Paper

Library tests named
  • Serial Naming TaskSecondary3 weeks
  • Rhythm Discrimination TaskSecondary3 weeks
NCT02493426Start2014PhasePhase 2ConditionsAutismParticipants27Lead sponsorOtherStatusCompleted

Results

Library tests named
  • Serial Naming TaskPrimary2 weeks
NCT01163188Start2010PhaseObservationalConditionsOther conditionsParticipants520Lead sponsorOtherStatusCompleted

Paper 1Paper 2Paper 3

Library tests named
  • Verbal FluencySecondary3 years
  • N-Back TaskPrimary3 years
  • Serial Naming TaskSecondary3 years
NCT00922636Start2009PhasePhase 2/3ConditionsADHDParticipants340Lead sponsorIndustryStatusCompleted

ResultsPaper

Library tests named
  • Digit Span TestSecondary8 weeks
  • Letter-Number Sequencing TaskSecondary8 weeks
  • Serial Naming TaskSecondary8 weeks

Page 1 of 1

Questions, answered from the data

How many clinical trials use the Serial Naming Task?

22 registered studies on ClinicalTrials.gov name it in an outcome measure, 7 of them in a primary outcome.

In which conditions do trials use the Serial Naming Task?

Most often in depression and bipolar disorder (1), ADHD (1) and autism (1).

Which tests do trials use with the Serial Naming Task?

The Digit Span Test (6 studies), the Rhythm Discrimination Task (4 studies) and the Lexical Decision Task (3 studies).

More on tests in clinical trials

  • Serial Naming Task: 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.

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