... col-lection.Power analysis In determining sample size for psychometric testing, the number of items contained in the target instrument, sen-sitivity of other instruments being used, and data analysistechniques ... wereoffered to families through physicians' offices and schools. Families interested in learning about the studycontacted the PI. After being informed of the purpose and nature of the study, ... laughing with friends, swim-ming in chlorinated pools, riding horses, playing withpets, going to camp, eating certain foods, being indoor oroutdoor, exercising, and sleeping [11-17]. Without the...