[domador]

"The first thing I was told in an educational psychology lecture was to never cite any research more than ten years old."

Just to confirm, did you really mean to say MORE than ten years old or did you mean LESS?

[cjs_ac]

There's no typo there, what I typed is what we were told. There's a genuine belief that research expires after ten years in educational psychology (and possibly other human sciences). It was a sharp contrast to my major in physics, in which the first year was almost exclusively ideas from the eighteenth and nineteenth centuries.