Complex sentence: Baddeley graduated from University College London in 1956 and obtained an M.A. from Princeton University's Department of Psychology in 1957, followed by a Ph.D. from University of Cambridge in 1962.
Split into simpler sentences: Baddeley graduated from University College London in 1956 and obtained an M.A. from Princeton University's Department of Psychology in 1957. He was awarded with a Ph.D. from University of Cambridge in 1962.