Visual Change Detection Task (Web)

Browser-native companion to T000068-visual-change-detection-task, delivered by the shared psyflow-web runner.

Alignment

• Exact: set sizes 2/4/6/8, balanced same/change cells, 500-ms fixation, 100-ms sample, 900-ms retention, 2000-ms response window, F/J mapping, one-color-change construction, outcomes, and Cowan K.
• Web-specific: browser event triggers replace serial hardware triggers; the shared runner owns fullscreen, keyboard handling, and data download.
• Trial count: no preview reduction in the repository config; 8 practice and 160 scored trials match the canonical task.

Data

Reduced output contains one logical trial per row, including the sampled colors and positions, changed index, response, correctness, outcome, and phase-level fields.

Shared Runner Refresh

.github/workflows/notify-psyflow-web.yml dispatches html-task-updated after pushes to main. The TASKBEACON_ORG_DISPATCH_TOKEN fine-grained PAT must have access to TaskBeacon/psyflow-web with Contents: Read and write; TaskBeacon organization approval may also be required.