Shape memory: memory under interference

You memorise a series of shapes, solve quick calculations that interfere with your memory, then pick out the shapes you saw from lookalikes. It measures working memory when your attention is divided.

Why it matters for ATC selection

Divided attention and memory under interference are central to ATC selection. On the job, new calls and tasks constantly interrupt what you are holding in mind.

How the practice works

• You will see three shapes, one after another. Memorise them.
• Then decide whether five quick calculations are correct.
• Finally, pick out each shape you saw from four similar options.
• The sequence repeats four times.

The full-length test runs for 5 minutes. The full-length test is part of full access. Every practice item is original. Full access adds feedback on where you lost marks and how to improve.

Tips

• Describe each shape in words as you learn it: outline first, then inside, then details.
• Treat the calculations as scored. Check the last digit first, then go back to rehearsing.
• The lookalikes move a detail or rotate the inner shape. Code positions, not impressions.