When a child shows reluctance in new situations or when meeting new people, he or she is said to experience:

A sample that does not represent the entire group of interest is called a _____ sample

a) bad b) random c) biased d) partial

The two kinds of variables found in every experiment are _____ and _____ variables

a) dependent; independent b) causal: correlational c) extraneous; controlled d) conditional; behavioral