Many theories attempt to explain gender dysphoria, but little ________ exists to support them.

Don tells Ray he wants to get a new sports car. Ray immediately understands why, because he is familiar with the common characteristics of sports cars and knows what makes them different from family cars. Ray is using mental categories called:

a) classes. b) concepts. c) attributes. d) classifications.

According to Piaget, children from the ages of 2 to 7 are in the ____ stage of cognitive development

a. sensorimotor b. preoperational c. concrete operations d. formal operations