Given a sample of those who did not respond to a mailed questionnaire, the main purpose for interviewing the sample is to
a. increase the size of the sample.
b. attempt to change the results that the investigator did not like.
c. discover which items were unclear to the subjects.
d. determine whether non-respondents differ from respondents.
e. determine what the non-respondents think about the questionnaire.
Ques. 2Educational psychologists who are familiar with research findings
a. almost always agree on what the data indicate.
b. tend to criticize and therefore ignore the quality of the data.
c. rarely form conclusions on the basis of research findings.
d. sometimes construct different interpretations of what the data mean.
Ques. 3To obtain data in a survey, a mailed questionnaire has been used. Would you advise the researcher to follow up some of those in the sample who failed to respond to the questionnaire?
a. Yes, a large sample will avoid bias.
b. Yes, the respondents may differ from non-respondents.
c. No, delayed returns would be of doubtful value.
d. No, a certain loss of respondents is expected.
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