Semantic overlap between scale items may be a good thing: Reply to Smedslund

Smedslund has rediscovered the fact that the items of many scales are to various degrees semantically related. He is critical of this. It is pointed out that there is already an ongoing debate about how much semantic overlap there should be between items and it is claimed that such overlap is important in maximizing reliability. Too much overlap does however limit validity so proposals for formalizing the degree of overlap are briefly explored.