Weaker results were found for internal consistency (α = .73), probably reflecting the brevity of this measure. Thus, developing a longer scale might result in higher internal consistency ratings. On the other hand, an alpha of .73 for such a short scale is fairly good. Another weakness is that this measure was adapted from a measure originally intended for the seriously mentally ill. As such, it may not adequately sample all the content domains that might be relevant to a substance abusing sample. However, our sample of experts did not identify any areas of content that were obviously not included.
