psephology: [20] The term psephology ‘study of voting patterns’ was coined in the early 1950s by R B McCallum from Greek pséphos ‘pebble’. Pebbles were used in ancient Greece for casting votes, and so pséphos came to mean metaphorically ‘vote’ – hence psephology.
psephology (n.)
"study of elections," 1952, from Greek psephizein "to vote" (properly "to vote with pebbles," from psephos "pebble") + -logy.
