Design choices
Define the n level, stimulus set, target ratio, response key, feedback rule, and break points before drafting screens.
- n level
- stimulus set
- target ratio
- response key
- breaks
Online N-back task design for working memory studies
A useful N-back task starts with simple instructions, balanced target trials, readable sequence fields, and a short block design that participants can complete.
Data rows
Each row should show whether the item is a target, what the matching prior item was, and how the participant responded.
- trial_id
- n_level
- stimulus_id
- is_target
- matched_item
- response_key
- rt
Usability check
Use practice examples and a completion check so users do not leave the task because the rule was unclear.
FAQ
What is an N-back task?
An N-back task asks participants to decide whether the current stimulus matches one shown N steps earlier.
Which fields should be exported?
Export n level, stimulus id, target status, response key, correctness, reaction time, block, and session id.
How should online versions stay usable?
Use short blocks and clear instructions for browser demos. Higher-load protocols need careful review and participant fatigue checks.