Seventeen measures o f association f o r observer reliabifity dnterobserver agreement) are reviewed and computational formulas are given in a common notational system. A n empirical comparison o f 10 o f these measures is made over a range o f potential reliability check results. The effects on percentage and correlational measures o f occurrence frequency, error frequency, and error distribution are examined. The question o f which is the "'best" measure o f interobserver agreement is discussed in terms o f critical issues to be consideredKEY WORDS: interobserver agreement; observer reliability; measures of association; naturalistic observation; interval-by-interval coding systems.
There is little multivariate, multiphasic research on childbirth pain and satisfaction. We explored the relationship of demographic, medical, psychological, and environmental variables at different times to multiple indices of pain and satisfaction in 70 primiparae and multiparae. Induced labor, desirability of pregnancy, and coach's helpfulness predicted sensory pain. Duration of labor, depression, and outcome expectancy that childbirth education would facilitate medication-free childbirth predicted affective pain. Physician-anticipated complications, induced labor, and motivation to be medication-free predicted pain intensity. Grade level predicted-satisfaction. The results also demonstrated differences between primiparae and multiparae in the pattern of variables that explained pain and satisfaction as well as the temporal sensitivity of pain predictors. We discuss the implications of our findings for research and practice.
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