Spatial and Perceptual Ability
What is tested
Spatial and Perceptual Ability measures mental rotation, pattern matching, cube nets, folding, and orientation. Items are designed so that one feature can anchor the whole figure.
Core rules
- Anchor one distinctive feature, then track adjacent edges, corners, and shading.
- Distinguish rotation from reflection: a rotated figure keeps clockwise order; a mirror reverses it.
- For cube nets, opposite faces never touch. In a four-square row, faces 1 and 3 are opposite, and 2 and 4 are opposite; the remaining two are opposite.
- Count vertices, edges, and exposed faces before choosing.
- Use elimination on impossible orientations rather than trying to build every option.
Worked example
A net has four squares in a row labeled 1-2-3-4, with square 5 above 2 and square 6 below 2. Which face is opposite 1? Fold the row into a band: 1 and 3 end up on opposite sides, as do 2 and 4. The top and bottom flaps 5 and 6 are opposite. So the face opposite 1 is 3.
Traps that cost marks
Accepting a mirror image as a rotation; ignoring hidden lines; assuming adjacent faces in the net stay adjacent; and losing left-right orientation after turning the page. Trace one edge all the way around before committing.