The following question is an example of a(n) ____. Do you believe that abortion should be illegal? Yes [ ] No [ ]
a. fixed alternative question.
b. open-ended question.
c. Likert-type item
d. none of these
A
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In scientific investigations, researchers must clearly define the variables under study by precisely describing how they will be measured or controlled. These definitions are referred to as
a. objective definitions. b. precise definitions. c. operational definitions. d. dictionary definitions.
____ is used to detect neural tube defects such as spina bifida
a. Genetic counseling b. Alpha-fetoprotein assay (AFP) c. Ultrasound d. Rh disease test
The youngest age at which most colleges label an individual as a returning adult student is ____
a. 25 b. 35 c. 45 d. 55
To determine if sugar-rich diets affect hyperactivity in kids, a researcher prepared two daily menus that children would receive for a 30-day period
A high-sugar diet was given to the boys, while the girls had a menu that seemed identical but was not a high sugar diet. At the end of 30 days, the boys and girls were evaluated to determine their levels of hyperactivity. In the study, the high-sugar diet is the _______. a. placebo b. independent variable c. dependent variable d. control group