Log-odds thresholds from a cumulative logit model fit. Should be a five-element vector.
Value
A six-element vector representing the thresholds on a seven-point scale.
Details
The basic algorithm is to copy the top and bottom thresholds and then to shrink the spaces between the thresholds on the six-point scale to 80% of their size. The left over space is allocated to the middle category on the seven-point scale.