Day 38 of 150 Spatial Difficulty 4/10
Paper folding probes spatial visualisation, not rotation
Quick answer
Paper folding probes spatial visualisation, not rotation. Today's question (Paper folding test) asks about a finding from Ekstrom, R. B., French, J. W., Harman, H. H., & Dermen, D. in 1976. The correct option is Predict the hole pattern that appears when a folded, hole-punched paper is unfolded — full explanation, primary source, and glossary cross-links below.
Today's question
The Paper Folding Test from the ETS Kit of Factor-Referenced Cognitive Tests measures spatial visualisation by asking participants to:
Reveal the answer and explanation
Correct: B — Predict the hole pattern that appears when a folded, hole-punched paper is unfolded
The Paper Folding Test (VZ-2) shows a sequence of folds applied to a square sheet, then a hole punched through the folded stack. Participants pick the unfolded pattern from five options. Performance loads on the spatial visualisation (Vz) factor — distinct from spatial relations (SR) probed by mental rotation. Ekstrom, French, Harman & Dermen (1976) established the test in the canonical ETS battery, and it remains a standard predictor of STEM achievement and expert performance in fields like surgery and engineering.
About the source
Ekstrom, R. B., French, J. W., Harman, H. H., & Dermen, D. (1976). Manual for Kit of Factor-Referenced Cognitive Tests. Educational Testing Service, Princeton NJ.
Every Cognition Bible question cites a primary source — a paper, book chapter, or monograph that exists, that we can point to on Google Scholar, and whose finding the question accurately summarizes. No fabricated authority strings, no name-drops without paper-level grounding.
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