subject condition iq 1 8 days 12.4 2 8 days 11.8 3 8 days 14.6 4 8 days 7.7 5 8 days 15.7 6 8 days 11.6 7 8 days 7 8 8 days 8.4 9 8 days 10.7 10 8 days 10.6 11 8 days 5.4 12 8 days 12.3 13 8 days 9.3 14 8 days 11 15 8 days 11.9 16 8 days 14.1 17 8 days 12.1 18 8 days 13.2 19 8 days 8.8 20 8 days 9.6 1 12 days 12.5 2 12 days 11.6 3 12 days 8.9 4 12 days 8.3 5 12 days 10.9 6 12 days 13.4 7 12 days 12.3 8 12 days 8.7 9 12 days 9.7 10 12 days 9.7 11 12 days 6.9 12 12 days 10.5 13 12 days 11.6 14 12 days 13.8 15 12 days 15.6 16 12 days 11.7 17 12 days 16.1 18 12 days 11.7 19 12 days 15 20 12 days 15.1 1 17 days 13.4 2 17 days 9.8 3 17 days 13.2 4 17 days 12.8 5 17 days 18.1 6 17 days 13.8 7 17 days 14.5 8 17 days 17.2 9 17 days 14.2 10 17 days 10.4 11 17 days 12 12 17 days 17.4 13 17 days 12.8 14 17 days 12.5 15 17 days 14.6 16 17 days 15.6 17 17 days 13.2 18 17 days 11.2 19 17 days 15.4 20 17 days 16 1 19 days 14 2 19 days 17 3 19 days 10.4 4 19 days 11.3 5 19 days 18.9 6 19 days 16.7 7 19 days 13.9 8 19 days 19.2 9 19 days 14.2 10 19 days 11.5 11 19 days 15.5 12 19 days 12.5 13 19 days 16.1 14 19 days 11.1 15 19 days 16.1 16 19 days 15.2 17 19 days 15.4 18 19 days 16.8 19 19 days 13.5 20 19 days 15.7