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Do Video Games Increase IQ? No Conclusive Evidence—But They Enhance Specific Cognitive Skills

No conclusive evidence shows video games raise general IQ (g-factor). However, they can enhance specific cognitive skills that underlie IQ subtests.

What Research Shows

Skill	Game Types	Evidence
Spatial Reasoning / Mental Rotation	FPS (CoD, Overwatch), 3D Platformers, Puzzle (Portal, Tetris)	Strong meta-analyses (Uttal et al., 2013; Bediou et al., 2018) — transfer to mental rotation tasks.
Attention / Visual Processing	Action games (fast-paced, peripheral tracking)	Improved useful field of view, contrast sensitivity, multiple object tracking (Green & Bavelier, 2003–2018).
Working Memory / Task Switching	Strategy (StarCraft, Civ), RTS, MOBA	Moderate gains in n-back, dual-task; limited far transfer.
Problem Solving / Planning	Puzzle (Zelda, Baba Is You), Immersive Sim (Deus Ex), Roguelikes	Near transfer (similar puzzles); weak far transfer to fluid reasoning.
Reading / Verbal	RPGs (heavy dialogue), Visual Novels	Correlational — motivated reading practice.

Critical Caveats

Near vs. Far Transfer: Games improve game-relevant skills. Transfer to unrelated tasks (IQ test items, academics) is small/inconsistent.
Dose-Response: 1–2 hrs/day shows benefits; >3 hrs correlates with lower academic/well-being outcomes (displacement).
Genre Matters: Action > Strategy > Puzzle > Simulation > Passive (clicker/idle).
Individual Differences: Baseline cognition, motivation, sleep, SES moderate effects.
Active Control: Many studies lack active control groups (e.g., learning instrument, sports, coding). Gains may equal other enriching activities.

Practical Takeaway

Games are a cognitive workout for specific circuits — not a magic IQ pill.
Pair with: Sleep (consolidation), Exercise (BDNF), Novel Learning (language, instrument), Social Play.
Choose games with depth, challenge, agency (not Skinner boxes).
Monitor for addiction signs (loss of control, withdrawal, harm).

Play for fun. Cognitive side-effects are a bonus, not the goal.

Computer Games