reliability in nonmethodological studies
Useful research studies must be based on measurement that are reliable. Measurement reliability in nonmethodological studies should often see be addressed at two times during the study:during the design phase and during the implementation phase.
In the design phase, the researcher must determine which of several possible measurement co protocols to follow, and which of several raters to use. Studies of interinstrument, interrater, or intrarater reliability components may be needed to make these decisions.
When conducting a pilot reliability study, the researcher needs to simulate the research conditions as closely as possible. The same types of dir subjects, settings, time pressures, and the like should be employed. The results of a pilot reliability study conducted after clinic hours, when the therapists and subjects have much time and few no distractions, may differ from those of the actual study if the actual study takes place during clinic hours, when time is short and distractions abound
Reliability measures should also be taken during implementation of a study. Several authors have found a decline in reliability from that seen during a training phase to that occurring during the experimental phase 12,13 Researchers can establish reliability during the course a study by taking repeated measures of all subjects, using pretest and post test scores of a control group as the reliability indicator, or taking repeated measures of selected subjects at random. Which strategy is adopted depends on factors such as the expense of the measures, the risks of repeated measurements to subjects, and the number of subjects in the study.
reliability in nonmethodological studies Useful research studies must be based on measurement that are reliable. Measurement reliability in nonmethodological studies should often see be addressed at two times during the study:during the design phase and during the implementation phase. In the design phase, the researcher must determine which of several possible measurement co protocols to follow, and which of several raters to use. Studies of interinstrument, interrater, or intrarater reliability components may be needed to make these decisions. When conducting a pilot reliability study, the researcher needs to simulate the research conditions as closely as possible. The same types of dir subjects, settings, time pressures, and the like should be employed. The results of a pilot reliability study conducted after clinic hours, when the therapists and subjects have much time and few no distractions, may differ from those of the actual study if the actual study takes place during clinic hours, when time is short and distractions abound Reliability measures should also be taken during implementation of a study. Several authors have found a decline in reliability from that seen during a training phase to that occurring during the experimental phase 12,13 Researchers can establish reliability during the course a study by taking repeated measures of all subjects, using pretest and post test scores of a control group as the reliability indicator, or taking repeated measures of selected subjects at random. Which strategy is adopted depends on factors such as the expense of the measures, the risks of repeated measurements to subjects, and the number of subjects in the study.
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