Given that theories can not be proved nor disproved by the results of a research study, how does scientific knowledge advance?
a. it doesn't
b. on the basis of null findings
c. on the basis of accumulated evidence over many studies
d. through logic
e. through experimentation
Question 2
Which of the following would be an operational definition of anxiety?
a. a participant's score on an anxiety scale
b. a researcher's rating of how anxious a participant appears
c. a physiological measure of anxious arousal
d. the frequency of nervous behaviors, such as fidgeting
e. all of the above are operational definitions of anxiety
