空间广度

Spatial span is the visuospatial counterpart of digit span, developed by Corsi.

You see a sequence of cells light up in order. You must tap them in the same or reverse sequence.

Typical span for adults is 5-6 forward. Backward span is 1 shorter.

This task loads the visuospatial sketchpad — the part of working memory specialised for location.

Each test is constructed using Item Response Theory (IRT) and Classical Test Theory (CTT) to ensure reliable measurement of knowledge and ability across different difficulty levels.

Questions undergo rigorous review including difficulty calibration, discrimination analysis, and distractor effectiveness evaluation to maintain high assessment quality.

1. Watch which cells light up and in what order.
2. After the sequence ends, tap them in order (or reverse).
3. Two consecutive mistakes ends the session.
4. Imagine a path through the grid, not individual cells.