Test battery

Language Battery

Four tests of naming, vocabulary, letter fluency and the comprehension of written commands, for language research.

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Tests: 4, in a fixed order
Evidence: A−Grade A−
Time: About 33 minutes
Device: Runs on desktop, laptop, tablet or phone.
Languages: Runs in English only: Picture Naming Test and Vocabulary Test keep their words and sentences in English.
Price: $0.99 academic or $2.49 commercial, per participant
Version: 1.0.0

Research use only

Tests in order

Participants take the tests in this order, each with its standard settings. Changing, reordering or adjusting a test makes the study a custom study.

1
Picture Naming Test
AEvidenceMain score: Percent Correct
6-10 min
2
Vocabulary Test
AEvidenceMain score: Accuracy
5-8 min
3
Verbal Fluency
AEvidenceMain score: Unique Valid Words
4-6 min
4
Token Commands Task
BEvidenceMain score: Percent Correct
6-9 min

Runs on desktop, laptop, tablet or phone. The app checks each participant's device before the first test. On phones and tablets, each test is compared only with sessions on the same kind of device. A test shows a percentile there once that reference group holds 50 valid sessions in the participant's age band; until then the report shows raw scores and says so.

Other orders

Possible orders: 24
In a balanced Latin square: 4

The 4 orders of a balanced Latin square, each test as its number in the list above
Order	1st	2nd	3rd	4th
1	1 Picture Naming Test	2 Vocabulary Test	4 Token Commands Task	3 Verbal Fluency
2	2 Vocabulary Test	3 Verbal Fluency	1 Picture Naming Test	4 Token Commands Task
3	3 Verbal Fluency	4 Token Commands Task	2 Vocabulary Test	1 Picture Naming Test
4	4 Token Commands Task	1 Picture Naming Test	3 Verbal Fluency	2 Vocabulary Test

A study run in this square can measure each test's position effect and the carryover each test leaves on the next.

Numbers are places in the list above. A study started from this battery gives everyone that order, or rotates it and stays this battery.

Try other orders in the order lab

Published evidence

A battery takes the grade most of its tests reach. A minus means some tests have a lower grade, and a battery is never more than one letter above its weakest test. The study builder grades every study the same way.

A−

Grade A−: most graded tests have at least grade A published evidence, and the minus means some have a lower grade. 3 tests have grade A evidence and 1 has grade B.

Grade A needs at least 25 test-retest papers and 25 registered clinical studies for each test. Token Commands Task has 21 test-retest papers.

Grade A means at least 25 papers report its test-retest reliability and at least 25 registered clinical studies use it as an outcome.

Grades describe the published research on each task, not this battery or ConductCognition's version of it. Source: ConductCognition test census 0.39.0, counted 31 October 2026 and 2 November 2026 from OpenAlex and ClinicalTrials.gov. See every test's counts or every battery's grade

What it measures

Word retrieval and naming
Vocabulary knowledge
Letter fluency
Comprehension of written commands

Suited to: Language research

Research areas: Language and bilingualism, aging and dementia

Example report

Participant report

Example data

Test	Main score	Result	Session quality
Picture Naming Test	Percent Correct	93.3%	Valid
Vocabulary Test	Accuracy	82.5%	Valid
Verbal Fluency	Unique Valid Words	40	Valid
Token Commands Task	Percent Correct	92.3%	Valid

No test in this battery has a reference group yet, so the report shows raw scores.

In a study, the report lists every score of each test, a percentile where a published norm covers the test and the participant's age, and each session's quality.

Price

Each participant uses one credit, however many tests: $0.99 for academic research or $2.49 for commercial research. Every account starts with 10 free participants, and yearly plans include participants each year. Compare plans

Start a study with this battery

Preview the tests yourself before you invite anyone. Research use only.

Start a study Read the guide