In manipulating independent variables, which types of variables involve physical changes produced within the participant's body via the administration of drugs or surgical manipulations?

If you fell forward and hit your forehead very hard on a concrete sidewalk, you can expect to have problems with which of the following?

a. hearing and understanding speech b. tasting and smelling c. seeing and speaking d. reasoning and executive control

Erikson's identity-versus-identity confusion stage is the period in which adolescents seek to determine what is unique and distinctive about themselves

Indicate whether the statement is true or false