Extended Data Fig. 2: Box plot of quantity of recycled cans by year.
From: Extrinsic rewards and crowding-out of prosocial behaviour
The center line denotes the median; box limits denote first and third quartiles; whiskers denote the highest (lowest) value within 1.5x the interquartile range, measured from box limits; points denote outliers defined as observations larger (smaller) than 1.5x the interquartile range measured from box limits (n = 20,370).
