Descriptive or experimental research that is conducted in a natural setting outside of the laboratory is called

One disadvantage to the case study design is:

a. we can only use one subject. b. internal validity is significantly threatened. c. it tends to discourage the later use of more rigorous experimental methods. d. we cannot make strong inferences.

Siegler's adaptive strategy choice model adopts the idea of natural selection from Darwin's theory of evolution and applies it to cognitive development

Indicate whether the statement is true or false