Rule Classification
Sort by colour, shape or size — while the rule changes
EUROCONTROL's "assign objects to categories" exercise. Put the object in the Item box into the right category. Three rules rotate: classify objects by colour, by shape, or classify numbers by size — and the app tells you when the categories change. Sometimes a message overrides the rule ("classify green shapes as blue"), and if an identical object appears in the Pair item box, Pair beats everything.
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What to expect
- An Item box, a Pair item box, and a row of category boxes underneath.
- The active categories change during the run — colours (3 boxes), shapes or number ranges (4 boxes).
- A standing message can override the colour rule until it is replaced.
- An identical pair overrules both the rules and the message.
What it measures
- Rule switching
- Resisting interference
- Holding an instruction while working
Instructions
- 1Read the banner first: it tells you when the categories change and carries any standing message.
- 2Check the Pair item box. If it holds the same object as the Item box, click Pair and move on.
- 3Otherwise apply the message if one is up, and the current rule if not.
Tips
- The pair check is the cheapest one to make, so make it first — it settles the answer outright.
- A message stays live until it is replaced. Most errors are people applying a message that has already gone, or missing one that just arrived.
Rule Classification
EUROCONTROL's rule classification exercise. A rule decides which of two groups an object belongs to — and the rule changes without being announced.
The current rule sorts by SHAPE, not colour. A red triangle, a blue triangle and a red circle have already been sorted: both triangles went left, the circle went right. A blue circle now appears. Where does it go?