Experimental design. Infants saw each of the pairs of images shown above, 8 times each (with side counterbalanced across trials and orders). On matching trials (n = 12, 2 per image-pair) they heard the labels in pink, on related trials (n = 12, 2 per image-pair) they heard the labels in green (whose images never appeared), and on nonce trials (n = 8, 4 per nonce object) they heard the labels in blue. There were 16 trials in each pair-type, 32 trials total.