. Author manuscript; available in PMC: 2020 May 8.

Published in final edited form as: J Aging Phys Act. 2016 Dec 5;25(3):402–411. doi: 10.1123/japa.2016-0039

Table 3.

Change in Mean Values of Primary Outcome Variables throughout the Study (N = 52, Unless Otherwise Specified)

Measure	Week 0,M (SD)	Week 4,M (SD)	Week 12,M (SD)	Statistical Test (df)	Significance (p value)	Effect Size $η_{p}^{2}$
Views on aging
Age stereotypes	40.85 (7.14)	47.40 (7.64)^a	43.50 (7.30)^a	F (2, 102) = 22.70	< .001	.31 (large)
AARC - Gains	17.67 (2.83)	20.58 (2.46)^a	19.21 (3.47)^a	F (2, 102) = 24.32	< .001	.32 (large)
AARC - Losses	11.08 (3.45)	10.83 (2.46)	10.02 (3.76)^a	F (2, 102) = 3.73	.028	.07 (medium)
Expectations regarding aging	50.18 (16.58)	64.05 (16.39)^a	60.04 (18.20)^a	F (2, 102) = 26.15	< .001	.34 (large)
Subjective age	−.16 (.12)	−.20 (.11)^a	−.22 (.13)^a	F (2, 102) = 5.47	.01	.10 (medium)
Control beliefs
General self-efficacy	26.37 (4.23)	–	28.13 (3.98)^a	F (1, 51) = 14.48	< .001	.22 (large)
Motivational self-efficacy	5.07 (.82) (Week 2)	5.50 (.67)^a (Week 3)	5.04 (.93)	F (2, 102) = 6.89	.002	.22 (large)
Physical activity
Total weekly physical activity (# moderate + vigorous min) N = 50	84.95 (91.17)	176.25 (89.92)^a (Week 5–8 avg)	171.55 (97.26)^a	F (2, 98) 24.70	< .001	.34 (large)

Abbreviations: AARC = awareness of age-related change; df = degrees of freedom.

Indicates a statistically significant improvement compared to baseline (p < .01).