The Cognitive Assessment System Second Edition (CAS2) measures basic psychological processing abilities in examinees age 5 - 17. Typical administration time is 40 - 60 minutes. The CAS2 Extended Battery has three subtests in each of the four PASS scales. The Core Battery includes two subtests from each of the four PASS scales. Each PASS scale as well as the CAS2 Full Scale yields a standard score with a mean of 100 and a standard deviation of 15.