Purpose
A classic change-detection task: players study an image (or a tray of objects) for 30 s, endure a short distraction, then inspect a version that now contains 1-2 alterations. Repeated practice in this paradigm reliably sharpens selective visual attention and visuospatial working-memory precision in older adults. nature.com

Key Objectives

Materials & Difficulty Curve

• High-resolution photos on a TV / tablet or real items on a tray.
• Timer & scorecards.
• Begin with simple scenes + one alteration; progress to busy scenes or multiple simultaneous changes.

Round Structure

1. Study – Show original scene (30 s).
2. Delay – Blank screen or breathing exercise (15-20 s).
3. Test – Show altered scene; players get ≤ 60 s to mark every difference.
4. Debrief – Score, then discuss encoding strategies (“I chunked the red items together”).
5. Run 6-8 rounds, shortening study time or adding changes as skill increases.

Measurement & Feedback

Track (a) correct changes per round, (b) average decision time, (c) flawless-round streaks. Compare pre/post scores on standard attention tests (e.g., Trail-Making A) for objective gains.