Lexical Decision Task
●ValidatedPlatform: HTML · English · · stale · 116d ago
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Local data export available
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Description
Participants decide as quickly as possible whether a string of letters forms a real word (e.g., TABLE) or a non-word (e.g., TABEL). Reaction times and accuracy measure lexical access speed and efficiency.
Contact & Lab
business
alternate_email
Task contact
Contributors
person
Citation
- Meyer, D. E., & Schvaneveldt, R. W. (1971). Facilitation in recognizing pairs of words: Evidence of a dependence between retrieval operations. Journal of Experimental Psychology, 90(2), 227–234.
- Keuleers, E., & Brysbaert, M. (2010). Wuggy: A multilingual pseudoword generator. Behavior Research Methods, 42(3), 627–633.
Credits
No credits provided.
Domains
Memory
Target Population
groups
Age Categories
secondary
young adults
middle age
older adults
medical_services
Clinical Status
non-clinical
info
Additional Notes
Applicable to clinical populations (aphasia, dyslexia research) with adapted stimulus lists.
Languages
English
Run under
settings
Engine
HTML / JavaScript
devices
Format
Online + in-lab
Modalities
behavioral
Task Outputs
info
This describes what the task records. Data collection is not yet integrated — contact the task author for actual output files.
What it measures
Measure lexical access speed and efficiency via response times and accuracy on word/non-word decisions.
Output formats
csv
One CSV per participant, one row per trialExperimental design
grid_on
Trial-based
tag
200 trials
Within-subject: lexicality
Conditions
lexicalityword
non-word
— Whether the stimulus is a real word or a pseudowordKey measures for analysis
- Mean RT for words (ms)
- Mean RT for non-words (ms)
- Accuracy for words (%)
- Accuracy for non-words (%)
- d-prime (signal detection)
Recorded variables
| Variable | Role | Type | Description | Unit |
|---|---|---|---|---|
trial_id | metadata | number | Trial number | - |
stimulus | independent | string | The letter string shown to the participant | - |
lexicality | independent | string | Whether the stimulus is a real word or a pseudoword Values: word, non-word | - |
response | dependent | string | Participant response (word or non-word) Values: word, non-word | - |
accuracystar | dependent | boolean | Whether the response was correct | - |
rtstar | dependent | number | Reaction time from stimulus onset to response | ms |
Provenance
Source: nccr-seed
Fetched: 2026-03-23
Last verified: 2026-03-23 — passed
Quick Actions
Additional Information
Created Date
2026-03-23
Last Modified
2026-03-23