Cohort Analysis by Dr. Norval D. Glenn

By Dr. Norval D. Glenn

Cohort research, moment Edition covers the fundamentals of the cohort method of learning getting older, social, and cultural swap. This quantity additionally evaluations numerous standard (but mistaken) tools of cohort research, and illustrates acceptable tools with analyses of private happiness and attitudes towards premarital and extramarital sexual kinfolk. ultimately, the booklet describes the foremost assets of compatible info for cohort reviews and provides the factors for applicable info.

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Example text

823. 033 (a reduction of 87%) by control of the male-female difference in percentage married. 01 on a two-tailed test). Another way to approach this issue is simply to regress reported happiness on age for males and females respectively and see how the difference between the male and female regression coefficients is affected by adding marital status (married vs. not married) to the regressions as a covariate. 001 on a two-tailed test). 001 and leaves the female coefficient at that level (because the linear relationship of age to marital status among women is virtually nil).

What seem to be minor differences in question wording can produce substantial differences in responses, as can differences in the order in which response alternatives are presented. Consider, for instance, a question about life satisfaction in which respondents are asked to rate themselves on a 7-point scale varying from completely satisfied to completely dissatisfied. The responses may vary according to whether the satisfied or dissatisfied alternative is presented first. They may also differ according to whether the intermediate points on the scale are identified verbally or just by numbers.

Most cohort analysts will use data in which these problems are not present. Less serious than the problems of comparing early and later Gallup data are the problems created by all major polling organizations changing their usual mode of questionnaire administration from face-to-face to telephone interviewing, typically in the late 1970s or early 1980s. The problems posed by the shift to telephone interviewing are not serious enough to discourage use in the same study of early and later poll data from the same polling organization, but the researcher needs to know when the transition to telephone interviewing took place and should look for sudden changes in responses to repeated questions that occurred at that time.

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