The Marriage Checkup: a randomized controlled trial of annual relationship health checkups.

OBJECTIVE: This study assessed the efficacy of the Marriage Checkup (MC) for improving relationship health and intimacy. METHOD: Cohabiting married couples (N = 215, Mage women = 44.5 years, men = 47 years, 93.1% Caucasian) recruited from a northeastern U.S. metropolitan area through print and electronic media were randomly assigned to MC treatment or wait-list control. Treatment but not control couples participated in assessment and feedback visits, at the beginning of the study and again 1 year later. All couples completed 9 sets of questionnaires over 2 years. Outcome measures included the Quality of Marriage Index, the Global Distress subscale of the Marital Satisfaction Inventory-Revised, the Intimate Safety Questionnaire, and the Relational Acceptance Questionnaire. RESULTS: A latent growth curve model indicated significant between-group differences in intimacy at every measurement point after baseline (d ranged from .20 to .55, Md = .37), significant between-group differences in women's felt acceptance for every measurement point after baseline (d ranged from .17 to .47, Md = .34), significant between-group differences in men's felt acceptance through the 1-year 2-week follow-up (d across follow-up ranged from .11 to .40, Md = .25), and significant between-group differences in relationship distress through 1-year 6-month follow-up (d across follow-up ranged from .11 to .39, Md = .23). CONCLUSIONS: Longitudinal analysis of the MC supports the hypothesis that the MC significantly improves intimacy, acceptance, and satisfaction. Implications for dissemination are discussed.

Momentum-space entanglement spectrum of bosons and fermions with interactions.

We study the momentum space entanglement spectra of bosonic and fermionic formulations of the spin-1/2 XXZ chain with analytical methods and exact diagonalization. We investigate the behavior of the entanglement gaps, present in both formulations, across quantum phase transitions in the XXZ chain. In both cases, finite size scaling suggests that the entanglement gap closure does not occur at the physical transition points. For bosons, we find that the entanglement gap observed in Thomale et al. [Phys. Rev. Lett. 105, 116805 (2010)] depends on the scaling dimension of the conformal field theory as varied by the XXZ anisotropy. For fermions, the infinite entanglement gap present at the XX point persists well past the phase transition at the Heisenberg point. We elaborate on how these shifted transition points in the entanglement spectra may support the numerical study of phase transitions in the momentum space density matrix renormalization group.