- Meta-analyses in personnel psychology (often associated with Schmidt, Hunter, and later reviews) report operational validities that are typically moderate for general mental ability, higher when jobs are more cognitively complex.
- No.
- No.
- If a workplace already selected on education or tests, remaining IQ variance shrinks and observed correlations can drop.
- No honest evidence from this website supports that.
- If you are curious about attention and switching, try reaction-time or task-switch-lite.
Is there a link at all?
Meta-analyses in personnel psychology (often associated with Schmidt, Hunter, and later reviews) report operational validities that are typically moderate for general mental ability, higher when jobs are more cognitively complex. “Moderate” is not “your future is fixed.”
Does that mean IQ is the only thing that matters?
No. Conscientiousness, specific skills, training, health, opportunity, and bias in ratings all matter. g is one predictor among many, and it is estimated from batteries, not from one game.
Can I use this site to pick a job?
No. These pages and games are not vocational counseling, not a fire-department or military selection test, and not a substitute for licensed assessment.
What about range restriction?
If a workplace already selected on education or tests, remaining IQ variance shrinks and observed correlations can drop. That statistical detail is why popular charts overclaim.
Do reaction-time games predict promotions?
No honest evidence from this website supports that. Simple RT and attention toys overlap weakly with some cognitive scores in labs; they are not hiring tools here.
How should I practice here?
If you are curious about attention and switching, try reaction-time or task-switch-lite. Treat the result as a game, not a career forecast.
❓ People also ask
Test–Retest Reliability
If you take a test twice, the number often moves. Psychometrics calls the stable part reliability and the bouncing part error, practice, mood, sleep, or a different form. A web game score is especially noisy.
Test–Retest Reliability →What Is a Standard Score?
Raw scores (items correct, milliseconds) are not comparable across ages or tests. A standard score rescales them so that, in a reference sample, the mean and spread are fixed. This site does not convert game hits into that scale.
What Is a Standard Score? →Nutrition and Cognition
Brains run on ordinary metabolism. Skipping meals, dehydration, and extreme restriction can make attention feel worse in the short run. That is not the same as a supplement raising IQ, and this site does not sell or endorse pills.
Nutrition and Cognition →Heat and Test Scores
Hot, poorly ventilated rooms make many people slower and more irritable. Research on ambient temperature and exam or cognitive-task performance is mixed but often points to discomfort and attention costs — not a rewritten intelligence.
Heat and Test Scores →Smartphones and Attention
A phone buzz is a cue to switch. Task-switching and interruption costs are well known in cognitive psychology. That is not the same headline as “smartphones reduce IQ,” which oversells messy, correlational literatures.
Smartphones and Attention →