Spatial ability · Visualization

Mental Rotation

Shepard & Metzler (1971) established that we really do 'rotate' images in our heads. Peters 1995's MRT-A redrawn version is the modern standard. Voyer 1995 meta-analysis found d≈0.67 male advantage.

DifficultyExpert = strict academic parameters

Intermediate: 18 items, 5 min

Look at the target. Among 4 options, select the 2 that can be obtained by rotating the target. Skip the 2 mirror-then-rotated ones. Submit when 2 are selected.

History

No training records yet

Refs: Shepard & Metzler 1971; Peters 1995; Voyer 1995.

Scientific basis

Mental Rotation · scientific basis

Spatial ability

Shepard & Metzler 1971 seminal Science paper. Peters 1995 redrawn MRT-A is modern standard. Voyer 1995 meta-analysis found d≈0.67 male advantage.

Expert-mode parameters

These are the standard parameters from the canonical paradigm (used by the "Expert" difficulty).

Parameter	Standard value	Source
Trials (Expert)	24 items	Peters 1995 MRT-A
Options per item	4 (2 correct, 2 mirror)	Peters 1995
Time limit	6 minutes (2 × 3)	Peters 1995
Strict scoring	Both correct = 1 point	Peters 1995
Our stimuli	Procedural 2D polyominoes (copyright-free)	This project

Healthy-population norms (by age)

Peters MRT-A strict scoring (0-24, both options must be correct for 1 point). Thresholds derived from Peters 1995, Titze 2010 (German adolescents) and Geiser 2008 mean/SD by age; Excellent = mean + 1 SD. Spatial ability peaks at 18-34 and declines notably with age. Males average 3-4 points higher than females (Voyer 1995 meta d≈0.67); this table is combined-sex. Assessment mode matches the band to your actual age.

Limitations： Adult bands (18-44) are strongest — Peters 1995 and Geiser 2008 (university sample n≈1000) are core sources. Adolescent bands 10-17 are supported by Titze 2010 (German n=1086) with solid evidence; literature on 8-9 year olds completing MRT is sparse (flagged `est` in norms.ts) and evidence is weak. 55-64 has Techentin 2014 meta support but smaller samples; 65+ is largely extrapolated as older-adult MRT norms are rare. Our stimuli are procedurally generated 2D polyominoes (not Peters' 3D figures) — values are directly comparable but note the stimulus difference. Cross-reference with the in-app Corsi visuospatial span.

Age band	Correct Excellent	Correct Mean	SD	Evidence
8-9	≥ 10	~6.5	3.5	moderate
10-11	≥ 12.5	~8.5	4.0	moderate
12-13	≥ 15	~10.5	4.5	moderate
14-15	≥ 17	~12	4.8	moderate-strong
16-17	≥ 18	~13	5.0	moderate-strong
18-24	≥ 18	~13.2	4.7	strong
25-34	≥ 18	~13	4.8	strong
35-44	≥ 17	~12	4.7	strong
45-54	≥ 15	~10.5	4.8	moderate-weak
55-64	≥ 14	~9	4.6	moderate-weak
65+	≥ 12	~7.5	4.5	weak (extrapolated)

Standard output metrics

·Total correct (strict 0-24) — Primary
·Mean RT per item — Speed
·RT × angle slope — Rotation rate (adult ~15-20 ms/°)

Citations

Shepard, R. N., & Metzler, J. (1971). Mental rotation of three-dimensional objects. Science, 171, 701-703. DOI
Vandenberg, S. G., & Kuse, A. R. (1978). Mental rotations, a group test of three-dimensional spatial visualization. Percept Mot Skills, 47(2), 599-604. DOI
Peters, M., et al. (1995). A redrawn Vandenberg and Kuse mental rotations test. Brain Cogn, 28(1), 39-58. DOI
Voyer, D., Voyer, S., & Bryden, M. P. (1995). Magnitude of sex differences in spatial abilities: A meta-analysis. Psychol Bull, 117(2), 250-270. DOI
Techentin, C., Voyer, D., & Voyer, S. D. (2014). Spatial abilities and aging: A meta-analysis. Exp Aging Res, 40(4), 395-425. DOI

All reference ranges come from published peer-reviewed literature. For personal training reference only — not a medical diagnosis. Full methodology: docs/PARADIGMS.md.

This tool is for educational and entertainment purposes only and does not constitute medical advice or a clinical diagnosis.