We can distinguish between the lower sound of the male singer and the higher sound of the female singer because the voices differ in:

The behavioral technique of _____ is used to help break the binge-purge cycle of bulimia nervosa.

a.) Systematic desensitization b.) Flooding c.) Exposure d.) Exposure and response prevention

According to a British study on siblings and gender typing, which of the following children is likely to be the most gender-typed?

A) David, who has an older brother B) Devon, who has no siblings C) Debbie, who has an older brother D) Daniel, who has an older sister