what is the difference between validity and reliability

If at this point your bathroom scale indicated that you had lost 10 pounds, this would make sense and you would continue to use the scale. Your clothes seem to be fitting more loosely, and several friends have asked if you have lost weight. If their research does not demonstrate that a measure works, they stop using it.Īs an informal example, imagine that you have been dieting for a month. Instead, they collect data to demonstrate that they work. Psychologists do not simply assume that their measures work. But how do researchers know that the scores actually represent the characteristic, especially when it is a construct like intelligence, self-esteem, depression, or working memory capacity? The answer is that they conduct research using the measure to confirm that the scores make sense based on their understanding of the construct being measured.

Describe the kinds of evidence that would be relevant to assessing the reliability and validity of a particular measure.Īgain, measurement involves assigning scores to individuals so that they represent some characteristic of the individuals.Define validity, including the different types and how they are assessed.Define reliability, including the different types and how they are assessed.Our online platform, Wiley Online Library () is one of the world’s most extensive multidisciplinary collections of online resources, covering life, health, social and physical sciences, and humanities. With a growing open access offering, Wiley is committed to the widest possible dissemination of and access to the content we publish and supports all sustainable models of access. Wiley has partnerships with many of the world’s leading societies and publishes over 1,500 peer-reviewed journals and 1,500+ new books annually in print and online, as well as databases, major reference works and laboratory protocols in STMS subjects. Wiley has published the works of more than 450 Nobel laureates in all categories: Literature, Economics, Physiology or Medicine, Physics, Chemistry, and Peace. has been a valued source of information and understanding for more than 200 years, helping people around the world meet their needs and fulfill their aspirations.

Our core businesses produce scientific, technical, medical, and scholarly journals, reference works, books, database services, and advertising professional books, subscription products, certification and training services and online applications and education content and services including integrated online teaching and learning resources for undergraduate and graduate students and lifelong learners. Wiley is a global provider of content and content-enabled workflow solutions in areas of scientific, technical, medical, and scholarly research professional development and education.

What is the difference between validity and reliability