The Science of Human Behavior, Measured.
Imagine a test where the questions you see depend on how well you’re doing. Get an item right, and the next item gets harder. Get it wrong, and the next one gets easier. The test calibrates itself to you, in real time, item by item, narrowing in on your true ability with each response. This … Read more
Every test, every scale, every measurement instrument in psychology and education starts with the same humble unit: the item. A single question, a single statement, a single decision point. Get the items right, and your measurement has a chance. Get them wrong, and no amount of sophisticated statistics will save you. Yet item writing is … Read more
If you teach, you give tests. Quizzes, midterms, finals, classroom assessments. They’re a core part of how we measure what students have learned. But here’s a question most teachers never ask: how good are your tests, actually? Most assessment in education is built on intuition. A teacher writes questions that seem fair, grades the results, … Read more
If you’ve ever taken a personality quiz online – one of those “Which Harry Potter character are you?” tests, or a viral “What does your favorite color say about you?” quiz – you’ve engaged with something that looks like psychological assessment but isn’t. These quizzes are entertainment. They have no scientific basis, no validated psychometric … Read more