Just did an interview with James Paulson an assistant professor at Eastern Virginia Medical School, who did another new study on postnatal depression in fathers. His study shows a slight decrease in word knowledge from children of depressed dads.

I still don't think that there is much relevance in their connection between a child's vocab use and paternal depression, but their studies are going toward a new-father program called Dad Matters. It might be interesting to keep an eye on them in the future.

http://skepticdad.wordpress.com/2008/05/15/new-dad-depression-3-new-interview/