Table 2. Correlations between accuracy difference (AccD) scores at 18, 21 and 24 months of age in the longitudinal sample in Study 2 (95% confidence intervals in brackets, using bootstrapping with 1000 samples).

	AccD 21 months	AccD 24 months
AccD 18 months	r = .638** (.255; .820) p = .001 n = 23	r = .339 (-.449; .646) p = .155 n = 19
AccD 21 months		r = .641** (.028; .859) p = .001 n = 24

** p < .01.