. Author manuscript; available in PMC: 2015 Jan 1.

Published in final edited form as: J Posit Psychol. 2014 Jun 10;9(6):523–534. doi: 10.1080/17439760.2014.920410

Table 3.

Pre- and Post-intervention outcome scores for participants recruited online only (mean and SD).

	Pre-intervention	Post-intervention	Treatment effect^*
CES-D (Depression)
Emotion reporting	22.9 (17.6)	22.8 (16.4)	β = −.34, p = .02
DAHLIA intervention	20.9 (11.5)	13.7 (9.58)	β = −.34, p = .02
PSS (Perceived Stress)
Emotion reporting	1.88 (1.02)	1.97 (.88)	β = −.43, p = .01
DAHLIA intervention	2.09 (.58)	1.50 (.69)	β = −.43, p = .01
Daily positive affect
Emotion reporting	4.54 (1.81)	4.17 (2.04)	β = .14, p = .40
DAHLIA intervention	4.68 (1.48)	4.76 (1.43)	β = .14, p = .40
Daily negative affect
Emotion reporting	3.06 (1.44)	2.56 (1.04)	β = −.32, p = .09
DAHLIA intervention	2.70 (1.29)	1.78 (.70)	β = −.32, p = .09

Regression parameter for condition predicting post-intervention score while controlling for pre-intervention score and condition X offline recruitment interaction (i.e., the parameter shown reflects effect of condition among online recruits only).

[note for reviewers: We used this statistic for consistency with the tests reported in the text. We also ran the tests by excluding offline recruits and using a single condition parameter, and the results were essentially unchanged.]