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Validity (statistics)

External Validity

❶Predictive validity refers to the degree to which the operationalization can predict or correlate with other measures of the same construct that are measured at some time in the future.

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Internal Validity

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Reliability and Validity. In order for research data to be of value and of use, they must be both reliable and valid.. Reliability.

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Internal consistency reliability is a measure of reliability used to evaluate the degree to which different test items that probe the same construct produce similar results. Average inter-item correlation is a subtype of internal consistency reliability.

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In research, internal validity is the extent to which you are able to say that no other variables except the one you're studying caused the result. For example, if we are studying the variable of. External Validity. Sarah is a psychologist who teaches and does research at an expensive, private college. She's interested in studying whether offering specific praise after a task will boost.

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In its purest sense, this refers to how well a scientific test or piece of research actually measures what it sets out to, or how well it reflects the reality it claims to represent. Validity encompasses the entire experimental concept and establishes whether the results obtained meet all of the requirements of the scientific research method. For example, there must have been randomization of the sample groups and appropriate care and diligence shown in .