Janice Long, and other newbies to the list who may have questions-- remember that there is an archive of past posts , which you can access. Janice will find lots there on environmental theories of PD, etc. To find these gems do the following: send email to: [log in to unmask] in subject line out "archive search" tell John what you want to know He is doingthis servicew for all of us--and I want to thank him again, as I'm always telling folks to write him! ;-) Camilla Fl9ntermann,CG for Peter 78/7,Ohio, [log in to unmask]