Jean Piaget observed and tested individual children on the conservation task between the ages of 4 and 5. Two years later he tested the children again on the same task. The results were recorded for each individual child. This is an example of research using which method?
A) case study
B) cross-cultural research
C) survey
D) time sampling

Question

Quizplus · Accepted Answer

Jean Piaget's method of observing and testing individual children on the conservation task, and then retesting them two years later, is an example of a case study. This method involves in-depth, detailed examination of a subject (or subjects) over a period of time.

Jean Piaget Observed and Tested Individual Children on the Conservation