_____ is considered to be a specific type of autism spectrum disorder.

According to Erik Erikson, the resolution of the identity crisis typically occurs in what developmental stage?

a. childhood b. adolescence c. middle age d. old age

Before beginning a study on the health effects of obesity, a group of researchers agree that, for the purposes of their research, anyone with a Body Mass Index greater than 30 kg/m² will be considered obese. This is an example of _______________

A) a confounding variable B) an operational definition C) convenience sampling D) an appeal to common sense