She also received a Diploma of Education from the same institution in 1948. After studying clinical child psychology at the University of Minnesota as a Fulbright scholar, Clay received her PhD from the University of Auckland in 1966, after completing her doctoral thesis entitled Emergent reading behaviour.
She also received a Diploma of Education from the same institution in 1948. Following her study of clinical child psychology at the University of Minnesota as a Fulbright scholar, Clay earned her PhD from the University of Auckland in 1966, after completing her doctoral research on Emergent reading behaviour.