Psychometrics
For discussing psychometrics research.
IQ and Mental Age
I think IQ needs more qualitative interpretations -- one of the original and most effective of these is the mental age interpretation. It's quite easy to do by just giving children of different ages adult IQ tests.  [Recently from CognitiveMetric](https://xcancel.com/CognitiveMetric/status/2069097794053292068#m) on X.co…
• Jun 28, 2026 • 2 replies
I don't think the "breakfast test" is real
We'll never know whether that greentext poster actually was a grad student studying intelligence in San Quentin inmates. Even so, I'm convinced that the conclusion that people are taking as gospel - that people below 90 IQ literally cannot grasp conditional hypotheticals, and this can be diagnosed with a question as simple as, "How would you have felt yesterday evening if you hadn't eaten breakfa…
• Jun 2, 2026 • 1 replies
Phenomenology of Intelligence
Has anyone tried to make an exhaustive list of mental phenomenon segregated by intelligence? For example Voss says that 120IQ plus is necessary to truly understand Calculus concepts and you hear below one standard deviation can't understand hypotheticals. What are other examples and what is the relevance of IQ on other psychological effects? Also what implications does a concept of G have on phil…
Do children have Bayesian intuitions?
Do children have “Bayesian intuitions”, so the ability to correctly determine posterior probabilities without knowing Bayes theorem? Central hypothesis: Bayesian thinking does not depend primarily on abstract mathematics, but rather on the alignment between cognitive abilities and the way the problem is framed. Children are capable of Bayesian thinking Even second graders can solve: ~22–32% of th…
• Mar 20, 2026 • 1 replies