To use WCF as WCF Rest service you have to enable webHttpBindings. It support HTTP GET and POST verbs by [WebGet] and [WebInvoke] attributes respectively. To enable other HTTP verbs you have to do some configuration in IIS to accept request of that particular verb on .svc files.
Concurrent validity is a measure of how well a particular test correlates with a previously validated measure. It is commonly used in social science, psychology and education. Don't miss these related articles:
Internal validity means. that the study measured what it set out to; external validity is the ability to generalise from the study to the readerâs. patients. With respect to internal validity, selection bias, information bias, and confounding are present to some. degree in all observational research. Selection bias stems from an absence of comparability between groups being. studied. Information bias results from incorrect determination of exposure, outcome, or both.