#Validity and reliability definition free

In Predictive validation, the predictor scores are collected first and criterion data are collected at some later/future point. It is good diagnostic screening tests when you want to diagnose. This kind of validation is appropriate for tests designed to asses a personВ’s current criterion status. In concurrent validation, the predictor and criterion data are collected at or about the same time. predictive validation:ДЇirst the term 'validation' refers to the procedures used to determine how valid a predictor is. A test has criterion-related validity if it is useful for predicting a personВ’s behavior in a specified situation. ' just cause it looks valid doesnВ’t mean it is.'Д¬riterion-related validity is a concern for tests that are designed to predict someoneВ’s status on an external criterion measure. Face validity is not a technical sense of test validity i.e., just b/c a test has face validity does not mean it will be valid in the technical sense of the word. This is different from face validity: face validity is when a test appears valid to examinees who take it, personnel who administer it and other untrained observers. Nevertheless, the test should have a high correlation w/other tests that purport to sample the same content domain. Content validity is primarily an issue for educational tests, certain industrial tests, and other tests of content knowledge like the Psychology Licensing Exam.Д®xpert judgement (not statistics) is the primary method used to determine whether a test has content validity.

For e.g., a comprehensive math achievement test would lack content validity if good scores depended primarily on knowledge of English, or if it only had questions about one aspect of math (e.g., algebra). Another way of saying this is that content validity concerns, primarily, the adequacy with which the test items adequately and representatively sample the content area to be measured. true-false) have lowered reliability coefficients.Д¬ontent, criterion-related, and construct validity 1) content validity:ДЄ test has content validity if it measures knowledge of the content domain of which it was designed to measure knowledge. For e.g., all other things being equal, short tests are less reliable than long ones, very easy and very difficult tests are less reliable than moderately difficult tests, and tests where examineesВ’ scores are affected by guessing (e.g. Factors affecting the reliability coefficientДЄny factor which reduces score variability or increases measurement error will also reduce the reliability coefficient.

#Validity and reliability definition free

Response sets include: social desirability (giving responses that are perceived to be socially acceptable), acquiescence (agreeing or disagreeing with everything, and deviation (giving unusual or uncommon responses).ДЄll of the above can threaten the validity of a given set of results.ДЄ test is reliable a) to the degree that it is free from error and provides information about examineesВ’ 'true' test scores and b) to the degree that it provides repeatable, consistent results.

a mastery test asses whether or not the person can attain a pre-specified mastery level of performance. a speed test, in which response rate is assessed.

a test of typical performance (e.g., personality test) which tells us what a person usually does. a test of maximum performance (e.g., achievement test) which tells us what a person can do. Concerns relating to standards include user qualification, security of test content, confidentiality of test results, and the prevention of the misuse of tests and results. Standards of Test Construction and Test Use:ДЄ good test should be reliable and valid. 'an objective and standardized measure of a sample of behavior.'Д«. Test construction: Introduction and Overview A. Test construction: Introduction and Overview Be warned, though, that when we discuss the threats to validity in experiementation we shall be using a rather different conceptual framework. So here we provide a brief overview of some of the traditional ways of thinking about the reliability and validity of tests. A psychological test is simply an approach to measurement often used in psychology. However, issues of the reliability and validity of a psychological test are parallel to concerns that one may have about any measure. The discussion of the construction, evaluation and application of psychological tests is beyond the scope of this course.