A(n) _____ hypothesis always specifies whether the posttest scores will be greater than or less than the pretest scores as a result of the treatment
a. a priori c. directional
b. post hoc d. nondirectional
C
A directional hypothesis specifies the direction of the change from pretest to posttest.
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A child cannot understand that a model and the larger object it resembles represent the same thing. This child
a. is probably in the concrete operational stage. b. is having difficulty with mental representations. c. is probably able to conserve. d. lacks the ability to engage in reversible actions.
What is the main advantage of an experiment over a correlational study?
a. The researcher knows the participants are representative of the population. b. The researcher is better able to draw conclusions about cause and effect. c. The researcher is able to study phenomena within their natural context. d. The researcher can legitimately use a much smaller sample size.
What type of a physician specializes in delivering babies?
a) doula b) pediatricians c) obstetricians d) gynecologists
________ is playing with another child but not communicating
Fill in the blank with correct word.