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Thomas GIA Spatial Visualisation Test: How to Spot a Mirror Image

Spatial Visualisation is the fifth and last Thomas GIA task: count how many boxes hold the same symbol rotated rather than its mirror image, and click that number.

Practise GIA Spatial Visualisation

GIA Spatial Visualisation is in the Thomas International unlock: £15 for all 9 tests, one-time payment, no subscription. Or try GIA Perceptual Speed free first.

What you do
Each box holds a top and a bottom symbol. Count the boxes where the bottom one is the same symbol turned, not a mirror image, and click the number.
Skills
Turning shapes in your head and comparing them.
Questions
Not published. You answer as many as you can in the time, and nobody is expected to finish.
Time limit
Not published per task. Thomas says each task lasts 2 to 5 minutes, and all five take 30 to 45 minutes with instructions and practice examples.
Scoring
Speed and accuracy count equally. A wrong answer is reported to cost half a mark on this task.
Pass mark
None published. Employers compare your result with their own benchmark for the role.
Device
Desktop or laptop only. It will not run on a phone or tablet, and a mouse is recommended.
Adjustments
Tell the person who invited you about anything that could affect how you sit it, before you start.

How the Spatial Visualisation task works

The task uses one symbol, shaped like a capital R, and its mirror image. Each box shows a symbol on top and one underneath, both turned to some angle. If the bottom one is the same symbol as the top, just rotated, the box is a matching pair. If it is the mirror image, it can never line up with the top one however far you turn it, so it does not match.

You count the matching pairs and click that number. Each item is reported to hold two boxes, so the answer is 0, 1 or 2.

How to tell a rotation from a mirror image

Use one landmark and one check:

  • Find the straight upright stroke, the stem, on the top symbol.
  • In your head, turn the top symbol until its stem stands upright with the rounded part at the top. Note which side of the stem the round part sits on.
  • Do the same with the bottom symbol. Same side means a match; opposite sides means a mirror image.
  • Count the boxes as you go, then click the total.

Worked example

Box one: the top symbol is a normal R. The bottom symbol is lying on its side. Turn it upright and its round part is on the right of the stem, as on a normal R, so this box matches.

Box two: the top symbol is a normal R. The bottom symbol is upside down. Turn it the right way up and its round part is on the left of the stem, a backwards R. That is a mirror image, so this box does not match. One box matches, so you click 1.

Tips for the real Spatial Visualisation task

  • Compare the two symbols in each box with each other. The top one can be turned too, so do not assume it is the normal R.
  • Treat it as an accuracy task. A wrong answer is reported to cost half a mark, so a fast run with slips can score below a slower clean one.
  • Use the practice examples to make the stem check automatic before the clock matters.
  • Do not tilt your head or the screen. Turning the shapes in your head is quicker once practised.
  • It comes last, after four other timed tasks. Use its practice examples to reset your focus before the clock starts.

Practise GIA Spatial Visualisation on CogniPrep

Our Spatial Visualisation drill gives you generated items with two boxes each, so the answer is 0, 1 or 2, on a 2-minute clock that starts when the first item appears and never pauses, with no fixed count. Either symbol in a box can be the normal or the mirrored form, turned in steps of 45 degrees, and each wrong answer costs half a mark. At the end you see how many items you reached, how many were wrong, your adjusted score and a percentile against CogniPrep players. The 2-minute clock is ours, because Thomas publishes only the 2 to 5 minute range.

Questions candidates ask

What is the Thomas GIA Spatial Visualisation test?

A mental rotation task. Each box shows two R-shaped symbols, and you count the boxes where the bottom one is the top one turned rather than its mirror image.

Does a mirror image count as a match in GIA Spatial Visualisation?

No. A mirror image can never be turned to line up with the original, so a box with a mirror image is not a matching pair.

How many answer options are there in GIA Spatial Visualisation?

Each item is reported to show two boxes, so you choose 0, 1 or 2.

Is GIA Spatial Visualisation timed?

Yes. Thomas says each GIA task lasts between 2 and 5 minutes, and you answer as many items as you can in that time.

Read next

Other Thomas International tests explained

Try it before the real thing

Get used to the GIA Spatial Visualisation format with our practice version before you take the real one. It is part of the Thomas International unlock.

Practise GIA Spatial Visualisation