Table 1.

Means and (standard deviations) for Site 1 before and after intervention

	PREP for Strong Bonds				Control
	Husbands		Wives		Husbands		Wives		Time by Group
	Pre	Post	Pre	Post	Pre	Post	Pre	Post	F (1,457)/Overall d
Marital Satisfaction	5.63 (1.26)	5.78 (1.25)	5.56 (1.30)	5.81 (1.18)	5.94 (1.11)	5.92 (1.13)	5.64 (1.38)	5.79 (1.37)	3.49+/ .11
	d = .12		d = .20		d = − .02		d = .11
Communication Skills	3.98 (1.13)	4.39 (1.22)	4.06 (1.19)	4.38 (1.22)	4.25 (1.12)	4.37 (1.06)	4.12 (1.16)	4.28 (1.09)	11.27**/.20
	d = .35		d = .27		d = .11		d = .14
Confidence	5.99 (1.10)	6.03 (1.05)	5.94 (1.26)	5.99 (1.15)	6.21 (1.00)	6.07 (1.11)	6.06 (1.05)	6.02 (1.18)	4.16*/.11
	d = .04		d = .04		d = −.13		d = −.04
Positive Bonding	5.44 (1.07)	5.48 (1.07)	5.52 (1.26)	5.54 (1.18)	5.78 (.97)	5.58 (1.06)	5.59 (1.14)	5.60 (1.18)	4.38*/.11
	d = .04		d = .02		d = − .20		d = .01
Forgiveness	5.32 (1.18)	5.32 (1.11)	5.22 (1.21)	5.23 (1.09)	5.37 (1.21)	5.42 (1.10)	5.24 (1.22)	5.32 (1.17)	.86/−.05
Dedication	6.50 (.75)	6.45 (.81)	6.59 (.73)	6.54 (.76)	6.56 (.70)	6.43 (.83)	6.59 (.62)	6.48 (.76)	2.48/.09
Satisfaction with Sacrifice	5.96 (1.03)	5.96 (1.00)	6.04 (1.01)	6.02 (.99)	6.21 (.87)	6.08 (.98)	6.04 (.97)	5.89 (1.07)	4.79*/.13
	d = .00		d =− .02		d = −.14		d = −.15
Negative communication	2.00 (.51)	1.93 (.49)	1.88 (.52)	1.88 (.52)	1.85 (.50)	1.81 (.51)	1.86 (.54)	1.84 (.53)	.06/−.01

⁺= p < .10,

^*= p < .05,

^**= p < .01

d = In columns for husband and wife values, Cohen’s d was calculated comparing magnitude of changes for pre to post values for husbands and wives in PREP and Control condition. “Overall d” represents the overall effect size of the intervention on the target variable.