PROMIS 2: Development and Validation of PROMIS pediatric item banks for physical activity, subjective well‐being, family relations, and stress experiences

Cross sectional data collection from school, clinic and internet panel settings for representativeness. Some subjects are included in more than 1 data set as they answered questions from multiple subdomains. The main objectives were to: To evaluate the psychometric properties of each bank, including testing the item response theory assumptions for item bank calibration. To calibrate each bank using item response theory methods. To produce fixed­‐length short forms and computerized adaptive tests for each bank Note: see "A summary of files.tab" for listing of item banks and corresponding files.