A grid briefly flashes lit cells. Reproduce the pattern. Grid size grows as you succeed.
The memory matrix is a spatial span task — the visuospatial twin of digit span.
A set of cells lights up for a fraction of a second. You then tap every cell you saw.
As you succeed, more cells are added and the grid grows.
Pattern-based encoding (seeing a shape rather than individual dots) is the path to high scores.
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.