![]() ![]() ![]() For example, if you were interested in measuring university students’ social skills, you could make video recordings of them as they interacted with another student whom they are meeting for the first time. Inter-rater reliability is the extent to which different observers are consistent in their judgments. Many behavioral measures involve significant judgment on the part of an observer or a rater. Again, a value of .80 or greater is generally taken to indicate good internal consistency. Note that this is not how α is actually computed, but it is a correct way of interpreting the meaning of this statistic. Cronbach’s α would be the mean of the 252 split-half correlations. For example, there are 252 ways to split a set of 10 items into two sets of five. Conceptually, α is the mean of all possible split-half correlations for a set of items. Perhaps the most common measure of internal consistency used by researchers in psychology is a statistic called Cronbach’s α (the Greek letter alpha). \): Split-Half Correlation Between Several College Students’ Scores on the Even-Numbered Items and Their Scores on the Odd-Numbered Items of the Rosenberg Self-Esteem Scale
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