Representing Attitudes as Intervals
A Reformulation of Coombs' Theory of Unidimensional Unfolding
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Revision with unchanged content. Attempts at measuring attitudes abound. Yet the standard representation of attitudes as points on a single dimension is inadequate for representing rela tionships of favourability and of implication between attitude statements. This book explores an alternative representation; attitudes are represented as intervals and parametized according to their midpoint and latitude. The mid point can be understood as the favourability of the attitude, while the lati tude can be understood as its generality or latitude of acceptance . Coombs Theory of Unidimensional Unfold...
Revision with unchanged content. Attempts at measuring attitudes abound. Yet the standard representation of attitudes as points on a single dimension is inadequate for representing rela tionships of favourability and of implication between attitude statements. This book explores an alternative representation; attitudes are represented as intervals and parametized according to their midpoint and latitude. The mid point can be understood as the favourability of the attitude, while the lati tude can be understood as its generality or latitude of acceptance . Coombs Theory of Unidimensional Unfolding is reformulated using this re presentation and 18 possible distance measures are examined, including the Minkowski r-metric and the Generalised Hyperbolic Cosine Model (GHCM). These measures are subjected to two empirical tests, the triangle inequality test, and the aligned stimuli test. The results suggest that the triangle ine quality fails, so the judgement space is not metric. Furthermore, only the GHCM (item) satisfied both tests and only if the operational function is strict ly log-convex. This suggests that the latitude of acceptance is an item para meter. This book is aimed at researchers in social science.
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