Unlike most of the disorders of childhood and adolescence, the causes of eating disorders are disproportionately related to ____ influences

In order to eliminate the third-variable problem in correlational research, which of the following techniques can a researcher employ?

a. Case studies b. Placebo techniques c. Random assignment d. Matched samples

During the ______________ period of prenatal development nearly all the major organs are formed

a. germinal b. zygotic c. embryonic d. fetal