This review examines the role of religion, for better and worse, in marital and parent-child relationships according to peer reviewed studies from 1999–2009. A conceptual framework labeled “relational spirituality” is used to: (a) organize the breadth of findings into the three stages of the formation, maintenance, and transformation of family relationships, and (b) illustrate three in-depth sets of mechanisms to delve into unique ways religion may shape family bonds. Topics include union formation, fertility, spousal roles, marital satisfaction and conflict, divorce, domestic violence, infidelity, pregnancy, parenting children, parenting adolescents, and coping with family distress. Conclusions emphasize moving beyond markers of general religiousness and identifying specific spiritual beliefs and practices that could prevent or intensify problems in traditional and nontraditional families.

Ninety-seven couples completed questionnaires about their involvement in joint religious activities and their perceptions regarding the sanctification of marriage, including perceived sacred qualities of marriage and beliefs about the manifestation of God in marriage. In contrast to individual religiousness and religious homogamy (distal religious constructs), these proximal religious variables directly reflect an integration of religion and marriage, and they were associated with greater global marital adjustment, more perceived benefits from marriage, less marital conflict, more verbal collaboration, and less use of verbal aggression and stalemate to discuss disagreements for both wives and husbands. The proximal measures also added substantial unique variance (adjusted R 2 change ranged from .06 to .48) to specific aspects of marital functioning after controlling demographic factors and distal religious variables in hierarchical regression analyses.

The authors reviewed 94 studies published in journals since 1980 on religion and marital or parental functioning. Meta-analytic techniques were used to quantify religion-family associations examined in at least 3 studies. Greater religiousness appeared to decrease the risk of divorce and facilitate marital functioning, but the effects were small. Greater Christian conservatism was modestly associated with greater endorsement and use of corporal punishment with preadolescents. Isolated findings suggested that greater parental religiousness relates to more positive parenting and better child adjustment. The scope, meaningfulness, and potential strength of findings were restricted because of reliance on global or single-item measures of religious and family domains. To facilitate more conceptually and methodologically sophisticated research, the authors delineated mechanisms by which the substantive and psychosocial elements of religion could benefit or harm family adjustment.

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Despite ample evidence that global indexes of religiousness are linked to family functioning, the mechanisms by which religion uniquely influences family dynamics are not well understood or empirically documented. To advance the scientific study of religion's role in families, we delineate how the construct of sanctification applies to marital and parent-child relationships as well as to the entire family systems according to diverse religious traditions. We define sanctification as a psychological process in which objects are perceived as having spiritual character and significance. We summarize the psychometric properties of two sets of measures that we have developed to assess the sanctification of marriage, parent-child relationships, and sexuality: Manifestation of God and Sacred Qualities scales. We hypothesize that sanctification has desirable implications for family life, supporting this assertion with empirical findings from our program of research. We also highlight the potential harm that may result from the sanctification of family relationships and discuss circumstances that may present particular risks (unavoidable challenges, violations by family members, loss, conflict, and intrapsychic and institutional barriers). Finally, we discuss future research directions to study more closely the influence of religion and sanctification on family life.