My copy is 1976. I remember reading this in undergraduate school in psychology for a class I took. I remember liking it pretty well and that it introduced me to some really interesting concepts. This would have been about 1978 or 79. I wasn't recording all my nonfiction reads at the time but I held onto this book and recently refound it when I was clearing out some old shelves at my work. Thus I'm recording it now in 2026 although I read it long before.