Groups of subjects that are not expected to differ in any systematic way before the independent variable is presented in an experiment are called ______ groups

The correct sequence of Piaget's stages of cognitive development are

a. preoperational; sensorimotor; concrete operational; formal operational. b. preoperational; concrete operational; sensorimotor; formal operational. c. sensorimotor; preoperational; concrete operational; formal operational. d. sensorimotor; preoperational; concrete operational; postoperational. e. sensorimotor; preconventional; conventional; postconventional.

In terms of IQ scores, fraternal twins develop more similarly than identical twins

Indicate whether the statement is true or false