In Inhelder and Piaget's balance experiment, trial-and-error problem solving was most characteristic of

Dr. Brody reminds her graduate students that development continues until death and that it reflects an ongoing, complex interaction between physical, cognitive, and social factors. Dr. Brody takes a(n) ______ approach to human development

a) multidirectional b) lifespan c) longitudinal d) "old-school"

A researcher began collecting data on a group of twenty-five children in the late 1970s. She is still compiling data on these individuals, who are now in their early thirties. This researcher is conducting a __________ study

a) longitudinal b) cross-sectional c) case d) survey