Glossary

A p-value is a number that helps you determine whether the results you’re seeing are likely due to chance or...

Assessment validity means your test, quiz, or assignment actually measures what you think it’s measuring. In other words, does your...

Assessment reliability means your test, quiz, or assignment gives consistent results. If you gave the same assessment multiple times under...

Cronbach’s Alpha: A Simple Guide for Teachers Cronbach’s Alpha is a statistical measure that tells you how well the different...

Point Biserial Correlation measures the relationship between getting a single test question right or wrong and a student’s overall performance...