Validity And Reliability Flashcards, test questions and answers

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What is Validity And Reliability?

Validity and Reliability are two important aspects of any experiment or research conducted. Validity is the measure of how accurately a method measures what it was designed to measure, while Reliability is the measure of how consistent the results are when the test is repeated. In order for a study to be considered valid and reliable, it must meet certain criteria.Validity refers to whether an experiment or research measures what it was intended to measure; in other words, does it provide accurate results? This can be measured through content validity, criterion-related validity, construct validity, criterion validity and face validity. Content validity is used to determine if all aspects of a concept have been captured by the instrument used in an experiment or research. Criterion-related validity compares scores from one instrument to another that assesses similar topics or competencies. Construct Validity looks at whether items on an instrument are measuring a single underlying construct; for example, does an IQ test reliably measure intelligence? Face Validity looks at whether items on an instrument seem appropriate and relevant for their purpose. In order for data gathered from research instruments to be valid they must meet these criteria as well as any others applicable based upon individual studies design requirements. Reliability refers to how consistently results are replicated when experiments are repeated multiple times under similar conditions. This can be measured through internal consistency reliability (using Cronbach’s alpha) which looks at item-to-item correlations within instruments; test-retest reliability which checks consistency between two administrations of the same instruments over time; interrater reliability which checks consistency between different people rating the same thing; parallel forms reliability which tests equivalence between two versions of a given instruments containing identical items and alternate forms reliability which checks equivalence between two or more versions containing different items but measuring the same thing(s). In order for data gathered from research instruments to be reliable they must demonstrate consistent findings across multiple trials using similar methods and participants/subjects when applicable. Overall, Validity and Reliability play very important roles in determining if an experiment or piece of research is useful for drawing conclusions about its topic area(s).