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Type III error


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A term occasionally used to refer to an error arising from a misinterpretation of the nature of the scores being compared in a significance test, as when a significant difference in an interrupted time-series design is misinterpreted as relating to a comparison between the mean of the baseline scores and the mean of the post-intervention scores, whereas the true comparison is between weighted means of the raw scores, the weights depending on the components of the statistical model (such as autoregressions and/or moving averages; see ARIMA). Compare Type I error, Type II error. [Named by the US psychologist Bradley E. Huitema (born 1938) by analogy with Type I and Type II errors]

Subjects: Psychology.


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