Winsteps

Can one have too much of a good thing? Certainly one can with loyalty. Everyone agrees that too little loyalty, i.e., disloyalty, undermines an organization. But too much loyalty means that doubtful instructions go unquestioned and new boat-rocking ideas ("creative dissent") are not presented, no matter how good they are.

Rasch fit statistics are much the same. Too much variation in the data, unmodeled noise, drowns out the measurement music. But too little variation and the music turns into the sound of marching boots.