Dual-Task Interference Test
Description
Multi-task performance test measuring dual-task interference by comparing single-task and dual-task performance on two independent response dimensions.
About This Test
Participants respond to visual stimuli that vary along two dimensions (e.g., arrow direction and position). In single-task blocks, they respond to only one dimension. In dual-task blocks, they respond to both dimensions simultaneously using different hands. The task measures how performance on each dimension is affected by the need to process and respond to the other dimension, quantifying dual-task interference. The test supports four stimulus types: circle/square + size, arrow direction + size, double arrows (no offset), and double arrows (offset).
Test Details
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Scientific Background
PEBL-Specific References:
These studies used the PEBL version of this task.
- Mueller, S. T. & Piper, B. J. (2014). The PEBL Dual-Task Battery. Computer software. http://pebl.sourceforge.net
Data Output
Creates two output files: dualtask-data-<SUBNUM>.csv with trial-level data and dualtask-block-<SUBNUM>.txt with block-level summary statistics.
Example Data
example-data.csv Primary
Trial-by-trial data with columns: subnum, stimtype, block, trialtype (PRACTICE/TEST), trial, condition (trial type 1-4), stim (stimulus number 1-4), dim1/dim2 (correct values), time0 (trial start), resp1/resp2 (semantic responses), rt1/rt2 (reaction times), corr1/corr2 (correctness), tooslow (timeout flag)
| subnum | stimtype | block | trialtype | trial | condition | stim | dim1 | dim2 | time0 | resp1 | rt1 | corr1 | resp2 | rt2 | corr2 | tooslow |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| example | 4 | 1 | PRACTICE | -25 | 1 | 2 | 0 | 1 | 8145 | DIM1A | 1661 | 0 | NA | 0 | 0 | 0 |
| example | 4 | 1 | PRACTICE | -24 | 1 | 4 | 0 | 0 | 11540 | DIM1A | 949 | 0 | NA | 0 | 0 | 0 |
| example | 4 | 1 | PRACTICE | -23 | 1 | 1 | 1 | 1 | 13800 | DIM1A | 575 | 1 | NA | 0 | 0 | 0 |
| example | 4 | 1 | PRACTICE | -22 | 1 | 3 | 1 | 0 | 15584 | DIM1A | 865 | 1 | NA | 0 | 0 | 0 |
| example | 4 | 1 | PRACTICE | -21 | 1 | 2 | 0 | 1 | 17713 | DIM1B | 424 | 1 | NA | 0 | 0 | 0 |
| example | 4 | 1 | PRACTICE | -20 | 1 | 1 | 1 | 1 | 19224 | DIM1A | 520 | 1 | NA | 0 | 0 | 0 |
| example | 4 | 1 | PRACTICE | -19 | 1 | 3 | 1 | 0 | 20701 | DIM1A | 576 | 1 | NA | 0 | 0 | 0 |
| example | 4 | 1 | PRACTICE | -18 | 1 | 4 | 0 | 0 | 22195 | DIM1B | 730 | 1 | NA | 0 | 0 | 0 |
| example | 4 | 1 | TEST | 1 | 1 | 2 | 0 | 1 | 24105 | DIM1B | 699 | 1 | NA | 0 | 0 | 0 |
example-data-block.txt Summary
Block-level summary with columns: stimtype, condition type, mean RT dimension 1, mean RT dimension 2, mean accuracy dimension 1, mean accuracy dimension 2, proportion too slow
| 4 1 615 0 1 0 0 |
|---|
| 4 2 0 721 0 0.96 0 |
| 4 3 569 578 1 0.96 0 |
| 4 1 464 0 1 0 0 |
| 4 2 0 513 0 0.88 0 |
| 4 3 549 579 0.92 0.96 0 |
| 4 1 510 0 0.92 0 0 |
| 4 2 0 438 0 1 0 |
| 4 3 656 665 1 1 0 |
| 4 1 490 0 0.96 0 0 |
Sample data showing typical output format. Actual values will vary by participant.
About This Test
Multi-task performance test measuring dual-task interference by comparing single-task and dual-task performance on two independent response dimensions.
Category: Executive Function
Estimated Duration: 15 minutes
Available Translations: 7 languages
Documentation Sources:
Test implementation, Parameter schema
Documentation Status: Standard