A psychologist concludes his method would be effective for teaching math to all third graders on the basis of testing it on a selected group of third graders with a control group for comparison. He is making use of

Dr. Kang is investigating the mechanisms that underlie how humans learn and solve problems. She is using the ____ approach to investigate human intelligence

a. information-processing b. psychometric c. cognitive d. psychophysics

Which statement best describes an element of the developmental pathways model?

a. Different developmental pathways can lead to the same outcome. b. Change is only possible during one specific point of development. c. A particular pathway can lead only in one direction. d. The line between normal and abnormal behavior is clear and absolute.