Table 1.
Components of the neuropsychiatric battery in the Cognition study
| Cognitive Test | Function Assessed | Scoring | Test Details |
|---|---|---|---|
| Mini-Mental State Exam | Cognitive Screen | Number Correct | Thirty-point questionnaire that samples abilities such as arithmetic, memory, and orientation. |
| North American Adult Reading Test | Intelligence | 128.7 -(0.89 * # of pronunciation errors) | Estimation of verbal intelligence quotient that requires subjects to read a list of 61 words out loud. |
| Immediate Recall* | Supraspan Learning & retention of information | Total initially correct | A test of memory in which a list of 12 words is presented during 4 trials, and retention of these words is tested after a delay of 25 to 35 minutes. Calculated scores include immediate recall (which is the sum of words recalled during the 4 trials), percent retention [(delayed recall / trial 4 of immediate recall) x 100], and delayed recognition. |
| Percent Retention* | Percent recall after delay | ||
| Delayed Recognition* | Number of correctly identified words | ||
| Block DesignΛ | Visual Construction & Fluid Reasoning | Number completed weighted for time | Subjects are required to reproduce depicted patterns using a set of colored blocks. |
| Digit Symbol-CodingΛ | Attention, Mental Processing Speed, & Executive Function | Number of copied symbols in 2 minutes | Symbols are decoded by matching a given symbol to a digit provided in an answer key. |
| Trail Making Test A | Time to Completion | "Connect-the-dots" for a consecutive number sequence from 1 to 25. | |
| Trail Making Test B | Time to Completion | "Connect-the-dots" alternating between numbers (1 to 13) and letters (A to L). |
*
Derived from the Word List Learning subtest of the Wechsler Memory Scale - III (WMS-III)
Λ
From the Weschler adult intelligence scale