Key points are not available for this paper at this time.
negative symptoms/rating scales/psychometrics In an accompanying article in this theme issue, Blanchard and Cohen review the evidence on the relationships among negative symptoms and conclude that meaningful subdomains within negative symptoms may exist.1 Spe-cifically, they suggest that blunted affect and poverty of speech may form one such subdomain, and anhedonia, asociality, and avolition may form another. The authors are appropriately cautious in raising this possibility, and they suggest further studies would be needed before it is confirmed. Should the independence of these 2 factors be con-firmed, it would have implications for research on negative symptoms. At the Consensus Development Conference on Negative Symptoms, sponsored by the National Insti-
Kirkpatrick et al. (Tue,) studied this question.