- Of intervals from the procedure, in the long run, under assumptions.
- Bayesian credible intervals answer a different question.
- Measurement error is expected.
- Often, for a mean.
- You can compute something.
- Take digit span twice.
95% of what?
Of intervals from the procedure, in the long run, under assumptions. Not “I am 95% sure I am a genius.” Pratique — pas un QI clinique.
How is it not a credible interval?
Bayesian credible intervals answer a different question. Do not swap the names to sound technical. Pratique — pas un QI clinique.
Why do IQ reports print ranges?
Measurement error is expected. A one-point difference is usually fog, not a destiny change. Pratique — pas un QI clinique.
Does a larger sample shrink the interval?
Often, for a mean. For a single person’s test score, the SEM of that test matters more than how many strangers took a web game. Pratique — pas un QI clinique.
Can I compute an interval on 16 flanker trials?
You can compute something. It will not be a Wechsler confidence band. Do not put it in a school file. Pratique — pas un QI clinique.
What to try?
Take digit span twice. The wobble is the lesson. Still not an IQ interval. Pratique — pas un QI clinique.
❓ Questions fréquentes
What is construct validity?
Construct validity is the argument that a score reflects a named idea — working memory, not “being clever in general.” It is built from theory, patterns of correlations, and failed rival explanations. A 20-trial number-Stroop lite can feel like control. Feeling is not a validity coefficient. This site never reports a licensed IQ. Pratique — pas un QI clinique.
What is construct validity? →What is criterion validity?
Criterion validity asks whether a score lines up with something you care about that is not the test itself — a later grade, a supervisor rating, or a Wechsler index. Concurrent means measured at the same time; predictive means later. A visual 2-back lite has no published criterion table. It is not an employment screen and not an IQ. Pratique — pas un QI clinique.
What is criterion validity? →What is content validity?
Content validity is whether the item set covers the skill or knowledge you claimed. A spelling test with only the letter Q is a coverage failure. Shape-span lite samples a tiny visuospatial sequence. It does not cover “all spatial intelligence.” Experts, blueprints and reviews build content arguments. A weekend hackathon does not. Pratique — pas un QI clinique.
What is content validity? →What is item response theory?
Item response theory (IRT) models each item: harder items need more of the trait for a 50% chance of success; discriminating items separate nearby people. Computerized adaptive tests pick the next item from that model. Pattern-matrices lite is a fixed original set. It does not estimate a theta with published item parameters. It is not an IQ. Pratique — pas un QI clinique.
What is item response theory? →What is a g-loading?
In a factor analysis of several tests, a general factor (g) can appear. A subtest’s loading says how much it shares that factor in that sample and battery. Matrices often load high; some speeded motor tasks load lower. A loading is not your worth. N-back lite is not a published g-loading table. This site does not output g. Pratique — pas un QI clinique.
What is a g-loading? →