As with the prevalence rates of schizophrenia among younger adults, more ____________ are diagnosed with psychotic disorders later in life

Skin becomes looser and muscle mass decreases during young adulthood and beyond because _______________________

a. there is a substantial decrease in iron and vitamin D b. there is a decrease in the production of vitamin K c. there is a decrease in growth hormones d. there is a decrease in calcium

If researchers are carrying out longitudinal studies, their hypotheses often require the use of __________ designs

a. between-subject b. within-subject c. repeated measures d. both b and c