Description Usage Arguments Details Value Author(s)
This function plots the rest scale (i.e., the scale excluding item j) against the variable Xj.
1 |
X |
A matrix of numeric variables that are being subjected to an item analysis in a summated rating scale. |
jitter |
The factor by which the y-values will be jittered |
... |
Other arguments to be passed to |
This function plots the rest scale (i.e., the scale excluding item j) against the variable Xj. This amounts to a visual investigation of the monotone homogeneity assumption in the summated rating model
A plot of each variable against its rest score (i.e., the item response function) and a plot of all item response functions in a single pane.
Dave Armstrong
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