Steve2,
My primary field is also psychology, at least according to my academic title "Professor of Psychology." But I tend to work at the intersections of psychology and sociology and have taught within both psychology and sociology departments. I was previously a senior lecturer in psychology at a university in England. I have no experience with psychology in NZ. But in all of my professional experiences, I have personally never come across academic researchers needing to be familiar with popular or nonacademic perspectives or general marketing publications for their academic research. That notion is completely foreign to me. The only time I could see it as being possibly relevant in some way is if a rsearcher were studying self help movements, etc. I could also perhaps see this as also true within some clinical or applied areas but I don't know for sure about that as I have no background in those areas so I am not qualified to comment (other than guessing).
As far as your comment on the OP, I agree completely with what you said -- I'd mention him as a nonacademic practioner.