Which of the following statements regarding Internet surveys is false?
A. Researchers have little control over the research environment when conducting Internet surveys.
B. Selection bias is less problematic for Internet surveys because of the large samples that are typically obtained.
C. Response rate bias due to nonresponding leads to relatively low response rates for Internet surveys.
D. Internet surveys represent a low-cost, efficient method for obtaining a large, potentially diverse sample of respondents.
B. Selection bias is less problematic for Internet surveys because of the large samples that are typically obtained.
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The US Department of Energy found that in 40 years of studies on the effects of radiation, ____ did not occur
a. debriefing b. operational definitions of variables c. voluntary participation d. random assignment
Which of these has NOT received FDA approval for use during the maintenance phase of alcohol treatment?
A. naltrexone B. bupropion (Zyban) C. antabuse D. acamprosate
In their study of the heritability of autistic traits among Dutch teens, Rosa Hoekstra and her colleagues were careful to choose participants from a variety of backgrounds and circumstances. Why is careful sampling especially important to studies of heritability?
A. The effects of genetics are most obvious in populations that exclude extreme environmental conditions, such as affluent or very poor families. B. Environmental influences are magnified in extreme environmental conditions, such as among affluent or very poor families. C. Extremes of environmental conditions, such as affluent or very poor families, tend to magnify the influence of genetics. D. These precautions are really not relevant, because heritability cannot be assessed experimentally.
Your co-worker was talking about how, after the academic year, he is going back to Japan for his grandmother's kanreki. What is the purpose of this ritual?
a. To celebrate her 50th anniversary b. To celebrate the birth of her first grandson c. To celebrate her professional accomplishments as she enters retirement d. To celebrate her freedom from previous responsibilities and elevate her to a respected status as elder