Table 1.

Means, Standard Deviations, and Ranges of Study Variables (N = 482).

Variable	M	SD	Min	Max
Positive exchanges (W1)	2.25	0.92	0.00	4.00
Positive exchanges (W3)	2.42	0.78	0.00	4.00
Positive exchanges (W5)	2.44	0.83	0.00	4.00
Negative exchanges (W1)	0.36	0.53	0.00	3.75
Negative exchanges (W3)	0.38	0.53	0.00	4.00
Negative exchanges (W5)	0.38	0.55	0.00	3.00
Disability (W1)	0.38	0.81	0.00	7.00
Disability (W3)	0.95	1.87	0.00	13.00
Disability (W5)	1.17	2.18	0.00	15.00

Note: W = wave; SD = standard deviation.