1.Though Jesse spent most of his growing years in a succession of foster homes after enduring abuse and neglect, his disposition in cheerful and his relationships are healthy and fulfilling. According to developmentalists, he exhibits ______ (the ability to overcome or bounce from adversity) despite his early experiences.
2.In a(n) ______, the scientist deliberately changes one variable and measures the change in some other variable.
3.When differences between the experimental group and the control group are so large that they could not have occurred simply by chance, they are considered to be statistically ______.
4.A developmental psychologist (e.g., Jean Piaget) who bases his conclusions on intensive study of one child or a few individuals is using the ______ method.