Developing Biomarker-Supported Schizophrenia Spectrum Disorder (SSD) Prevention

This is a 21 item questionnaire and items are scored as 0 (symptom not endorsed) or 1 (symptom endorsed). Items endorsed are further assessed for level of distress (1-5) and chronicity (present 6 months, 1 year, 2 years, or more than 2 years ago). The total symptom score is calculated as the sum of distress ratings of all items at baseline with 1) "Did it bother you?" answered "Y" AND 2) endorsed as distressing at one or more previous time points. The range of the total symptom score is 0 to 105. Higher scores indicate greater distressing and persistent psychotic-like experiences.

The NIH Toolbox subtests including List Sorting Working Memory, Pattern Comparison Processing Speed, and Rey Auditory Verbal Learning will be used. Higher scores indicate better cognitive performance. Raw scores of the test taker are compared to the scores in the NIH Toolbox nationally representative normative sample to derive standard scores. The mean standard score is 100 and the standard deviation (SD) is 15. A score at or near 100 indicates average ability compared with others. Scores around 115 suggest above-average ability. Scores around 130 suggest superior ability (in the top 2 percent nationally). A score around 85 suggests below-average ability. A score in the range of 70 or below suggests significant impairment.

This is a 113 item questionnaire and each problem item is scored as: 0 (not true) 1(somewhat or sometimes true) and 2 (very true or often true). Raw scores are summed and converted to age- and sex-normed T-scores. Higher T-scores indicate greater overall psychopathology

This is a 10 item questionnaire and each item is scored on a 5-point scale from 0(never) to 4 (very often). Positively worded items are reverse scored, and all items are summed to generate a total score ranging from 0 to 40. Higher scores indicate greater perceived stress.