In order to get an overall estimate of Mr. Smith’s intellectual functioning; an entire WAIS was completed by the patient. Mr. Smith earned a FSIQ of 111, classifying his overall intellectual ability, as measured by the WAIS-IV, as High Average Range. Furthermore, in the case of Mr. Smith, the difference between his highest index (140 on the PSI) and his lowest index (96 on the VCI) =44points. This value is more than 23 points, so his FSIQ is less useful and cannot be validly interpreted. His FSIQ is ranked at the 77th percentile, indicating that he scored higher than 77% of other individuals the same age in the standardization sample.
WAIS RESULTS: ACSS Percentile Qualitative
Arithmetic 12 75 High Average
Symbol Search 16 98 Very Superior
Cancellation 19 99.9 Very Superior
Block Design 7 16 Low Average
Matrix Reasoning 7 16 Low Average …show more content…
Smith’s factor index scores provided a more detailed understanding of his intellectual abilities. More specifically, the WAIS-IV Nonverbal reasoning and visuospatial/visuoconstructional abilities, as measured by the Perceptual Reasoning Index (PRI), was in the Average range. Likewise, the Working Memory Index (WMI) was in the Average range. This index examines working memory and complex/divided attention. The Processing Speed Index (PSI), which assesses psychomotor speed and sustained attention, was in the Very Superior range. Verbal Comprehension Index (VCI) was within the Average range, indicating intact verbal reasoning, vocabulary, and acquired knowledge. This index removes the influence of working memory/attention, thereby yielding a more pure description of verbal