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:
Robert S Michael Internal & External Validity-5. Variables & Internal Validity. â  Extraneous variables are variables that may compete. with the independent variable in explaining the. outcome of a study. â  A confounding variable is an extraneous variable that.