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:
For example, IQ, Emotional Quotient, and most school grading systems are good examples of established tests that are regarded as having a high validity. One common way of looking at concurrent validity is as measuring a new test or procedure against a gold-standard benchmark.