Table 2.

Younger and Older Group Performances on the Barrier Task

Time to Completion:
	Bin 1	Bin 2	Bin 3	Bin 4	Bin 5	Bin 6	Bin 7	Bin 8
Older	425.8	140.6	101.4	82.2	92.0	61.9	58.8	50.2
Younger	246.8	56.4	45.5	34.5	35.8	30.0	29.9	27.8
Difference	179.0	84.2	55.9	47.7	56.2	31.9	28.9	22.4
Effect Size	1.37	2.04	2.17	2.14	2.25	1.95	1.97	1.61
Power	.97	.99	.99	.99	.99	.99	.99	.98
Number of Words:
	Bin 1	Bin 2	Bin 3	Bin 4	Bin 5	Bin 6	Bin 7	Bin 8
Older	713.3	269.1	195.8	144.9	163.8	115.2	103.1	91.6
Younger	451.9	86.5	61.2	45.4	47.3	35.4	32.7	30.0
Difference	261.4	182.6	134.6	99.5	116.5	79.8	70.4	61.6
Effect Size	1.14	2.09	2.29	1.92	1.83	1.74	1.82	1.63
Power	.90	.99	1	.99	.99	.99	.99	.99
Number of Turns:
	Bin 1	Bin 2	Bin 3	Bin 4	Bin 5	Bin 6	Bin 7	Bin 8
Older	56.25	23.07	17.28	15.44	18.32	14.11	13.71	12.88
Younger	36.34	13.21	12.41	11.25	11.24	10.72	10.05	10.00
Difference	19.91	9.86	4.87	4.19	7.09	3.39	3.66	2.88
Effect Size	1.04	1.52	1.5	1.1	1.55	1.27	1.33	1.39
Power	.84	.98	.98	.86	.98	.94	.96	.97