A researcher is concerned that experimental results obtained with college students may not apply to adults in the general population. This illustrates a concern with ____ validity

Preschoolers with imaginary companions

a. have fewer real friends than other preschoolers. b. are more sociable than other preschoolers. c. cannot distinguish fantasy and reality as well as other preschoolers. d. have developmental problems.

The child who responds to his/her parent as if they were saying, "Why do you keep leaving me to fend for myself?" is demonstrating a(n) _______________ attachment style

Fill in the blank(s) with correct word