Define reliability and validity in your own words. Briefly describe the different types of reliability and...

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Psychology

Define reliability and validity in your own words. Brieflydescribe the different types of reliability and validity, includingwhy it is important to conduct a study that is reliable andvalid.

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Reliability and validity are two concepts in research that are important for defining and measuring bias and distortion Reliability refers to the extent to which assessments are consistent If a person takes the same personality test several times and always receives the same results the test is said to be reliable Types of Reliability 1 Testretest reliability This is a measure of reliability obtained by administering the same test twice over a period of time to a group of individuals The scores from Time 1 and Time 2 can then be correlated in order to evaluate the test for stability over time For exampleA test designed to assess student learning in psychology given to a group of students twice the second time after a gap of a week of the first test The obtained correlation coefficient would indicate the stability of the scores 2 Parallel forms reliability This is a measure of reliability obtained by administering different versions of an assessment tool Both versions must contain items that probe the same construct skill knowledge base etc to the same group of individuals The scores from the two versions can then be correlated in order to evaluate See Answer

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