Backed by science

Not just exam prep. The skills these games train - working memory, processing speed, numerical and spatial reasoning - are the everyday engines of focus and performance. Here's the honest evidence, including its limits.

The honest takeaway: research reliably shows that focused practice improves your performance on the trained tasks and closely related ones - which is exactly what these assessments measure - and that familiarity reduces test-day stress. Whether such training raises general IQ is genuinely debated. So Prepwise focuses on what's well-supported: getting measurably faster, sharper and calmer at these specific games.

Jaeggi et al. (2008) · PNAS

"Improving fluid intelligence with training on working memory." Showed that training on a demanding working-memory task (n-back) improved performance and transferred to reasoning tasks - early evidence that these capacities are trainable, not fixed.

Au et al. (2015) · Psychonomic Bulletin & Review

A meta-analysis of n-back working-memory training across many studies. Found small but reliable gains, supporting that structured, repeated practice produces real improvement in the trained ability.

Klingberg (2010) · Trends in Cognitive Sciences

A review of training and the brain's plasticity for working memory. Concludes that working-memory capacity can be increased with training and is reflected in measurable neural change.

Melby-Lervåg, Redick & Hulme (2016) · Perspectives on Psychological Science

A careful meta-analytic review. Confirms reliable improvement on the trained and similar tasks (near transfer) but finds limited evidence of transfer to general intelligence. We cite it for honesty: practice clearly helps you on these games, which is the point.

Hausknecht et al. (2007) · Journal of Applied Psychology

A meta-analysis of practice and coaching effects on employment-selection tests. Found that practising and re-taking cognitive tests reliably improves scores - direct support for preparing before your assessment.

Prepwise is a practice tool, not a medical or clinical product, and makes no guarantee of any score, intelligence change, or hiring outcome.

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