The object pairs used in the stir-lift events of Experiment 1, 2, 3 (Pairs 1 and 2) and Experiment 4 (Pairs 1 to 3). In Experiment 1, in the same-colors condition the spoons in each pair were green and red and in the different-colors condition the spoons in each pair were yellow and blue. In Experiments 2 and 3, the spoons in Pair 1 were green and red and the spoons in Pair 2 were yellow and blue. In Experiment 4, the spoons in Pairs 1 and 2 were identical to those of Experiment 3 and the spoons in Pair 3 were purple and orange.