In everyday language, the term validity is typically used to describe something as being trustworthy or legit. It's meaning in psychology suggests something similar—it's all about whether we can trust ...

Those of us in the business of psychological measurement use the terms reliability and validity a lot. You've probably seen those terms on the Psychology Today website (they appear thousands of times) ...

Most time-series research fails to consider measurement issues that are addressed regularly in cross-sectional research designs. However, to measure specified constructs in time-series research, ...

1 British Heart Foundation National Centre for Physical Activity and Health, School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK 2 School of Population Health, ...

4 Department of Physiotherapy, Centro “Riabilita”, Civitanova Marche (MC), Italy 5 Department of Physiotherapy Centro “Lovanium”, Pesaro, Italy 6 Department of Physiotherapy Centro “FKT Filanda”, ...

Purpose The study aimed to evaluate the reliability and validity of the Thai version of the Pediatric Quality of Life Inventory™ 4.0 Core Scales (PedsQL) as a measure of health-related quality of life ...

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 ...