Researchers establish control by ______.
A. manipulating the levels of a variable
B. holding all variables constant
C. manipulating the levels of a variable and holding all other variables constant
D. observing quasi-independent variables
Answer: C
You might also like to view...
Which statement best describes the influence of attitudes?
a. Attitudes impede decision-making processes. b. Attitudes make it more difficult to adjust to new situations. c. Attitudes require more than a "gut-level" response. d. Attitudes help us adapt.
In young children, ________ may be manifested as a "failure to thrive," or gain weight, or as delay in speech or motor development.
A) schizophrenia B) an adjustment disorder C) personality disorder D) depression
Pitch perception takes two processes: place theory and frequency theory
Indicate whether the statement is true or false
Endocrine glands secrete __________ that regulate various bodily functions
a. hormones c. neurotransmitters b. endorphins d. saliva