A correlation coefficient is a numerical measure of the __________.
A. unintended changes in participants' behavior due to cues from the experimenter
B. strength of the relationship between two variables
C. behaviors of participants of different ages compared at a given time
D. behaviors of participants followed and periodically assessed over time
Answer: B
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The cognitive effects of Head Start last throughout elementary school.
Answer the following statement true (T) or false (F)
Dave decides to conduct a survey of Americans adults. If the sample consists of 100 individuals, how many will say they favor marijuana legalization?
a) 25 b) 45 c) 60 d) 80
When George agrees to participate in a research study, he is told that he may quit at any point for any reason. The reason for this option of quitting is required by the ethical guideline the text refers to as:
a. informed consent b. protection from harm c. beneficial treatments d. privacy and confidentiality
A survey of psychiatrists in Switzerland found that ______ percent of them had never seen a
case of dissociative identity disorder. a. 30 c. 70 b. 50 d. 90