| Example 1: Size stands out | Example 2: Colour stands out | Example 3: Shape stands out |
Size | Variant―different sizes | Invariant―only one size | Invariant―only one size |
Colour | Invariant―only red | Variant―different colours | Invariant―only red |
Shape | Invariant―only cuboids | Invariant―only cuboids | Variant―different shapes |