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Specification Search
Viewing a Scatterplot of Fit and Complexity
E Click on the Specification Search toolbar. This opens the Plot window, which
displays the following graph:
The graph shows a scatterplot of fit (measured by C) versus complexity (measured by
the number of parameters) where each point represents a model. The graph portrays the
trade-off between fit and complexity that Steiger characterized as follows:
In the final analysis, it may be, in a sense, impossible to define one best
way to combine measures of complexity and measures of badness-of-fit
in a single numerical index, because the precise nature of the best
numerical trade-off between complexity and fit is, to some extent, a
matter of personal taste. The choice of a model is a classic problem in
the two-dimensional analysis of preference. (Steiger, 1990, p. 179.)
E Click any of the points in the scatterplot to display a menu that indicates which models
are represented by that point and any overlapping points.