The most recent revision of one of the most popular memory assessment instruments the Wechsler Memory Scale-Fourth Edition (WMS-IV) is a widely used measure of memory functioning which is particularly useful in the assessment of individuals with dementia traumatic brain injury and substance abuse problems among others. Professionals need an authoritative source on administration scoring and interpretation in order to use this test properly. Written by the test developers for the WMS-IV Essentials of WMS-IV Assessment is that source.