Table 1.

Baseline exploration in the Horizon task by study

	Primary study				Replication study
	t	df	P	95% CI	t	df	P	95% CI
Exploration in short horizon games	52.81	77	<0.001	[4.99, 6.93]	38.67	83	<0.001	[3.54, 4.88]
Exploration in long-horizon games	41.98	77	<0.001	[3.97, 5.52]	36.51	83	<0.001	[3.34, 4.61]
Strategic exploration	−2.15	154	0.02	[−0.66, −0.03]	−1.79	166	0.04	[−0.58, 0.03]

Note: One-sample t tests were used to examine whether children explored in short- and long-horizon games, respectively. A two-sample t test (one-tailed) was used to examine whether children explored more in long-horizon games than in short-horizon games. df = Degree of freedom; CI = Confidence interval.