METHOD: The study followed a single-blind parallel group in a randomized controlled trial using an experimental longitudinal design, comprising 72 heterosexual couples living in Shiraz, Iran, with a 1-7-year marital age and no severe marital problems. The experimental group received eight consecutive O-GPIs via the Zoom platform, while the control group received information related to parenting skills via email. The outcome measures were the three patterns of communication: (i) constructive communication; (ii) demand-withdraw communication; and (iii) mutual avoidance communication-the screening measure was the dyadic adjustment scale.

RESULTS: The findings indicated that O-GPI could improve couples' constructive communication significantly (45% for husbands and 40% wives) and decrease their total demand-withdrawal (51% for husbands and 65% wives) and mutual avoidance communication (60% for husbands and 62% wives).

LIMITATIONS: Due to the homogenous nature of the sample, generalizations should be made with caution.