1. What is the difference between the reliability and validity of a measurement? The validity of a measure is the extent to which differences in scores on the instrument reflect true differences among ...

In my previous blog post, I noted that reliability and validity are two essential properties of psychological measurement. Measures of intelligence, personality, vocational interests, and so forth ...

Nutrient profiling models classify the healthiness of foods based on their nutritional composition and provide the science that underlies nutrition signposting schemes. The two objectives were to ...

Background: We established a program of research to improve the development, reporting and evaluation of practice guidelines. We assessed the construct validity of the items and user’s manual in the β ...

IQ tests are one of the most prominent tools in the modern psychologist's toolbox. They also have numerous methodological flaws. IQ, short for intelligence quotient, is one of the most widely cited ...