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. 2021 Jun 9;16(6):e0251451. doi: 10.1371/journal.pone.0251451

Table 3. Multilevel analyses for relationship measures of dyads (Study 1).

Intraclass correlations, fixed effects estimates, and significance tests for the manipulation and covariates. Comparison with results reported in Przybylski and Weinstein [12].

    Fixed effect level-2 phone Fixed effect level-1 covariate gender Fixed effect level-1 covariate agea Fixed effect level-1 covariate positive affecta
  ICC b t p b t p b t p b t p
Przybylski and Weinstein [12]. Study 1
    Relationship quality 0.43–0.51 -0.99 3.08 0.004 -20 -0.61 0.55 -0.04 -0.03 0.12 0.80 2.99 < 0.001
    Partner closeness 0.43–0.51 -0.39 -2.56 0.02 -0.00-
-0.09
-0.06- -0.64 > 0.51 -0.00-
-0.09
-0.06- -0.64 > 0.51 -0.00-
-0.09
-0.06- -0.64 > 0.51
Przybylski and Weinstein [12]. Study 2
    Relationship quality 0.39–0.47 -0.19 -2.29 0.03 0.01–0.09 0.13–1.28 > 0.20 0.01–0.09 0.13–1.28 > 0.20 0.01–0.09 0.13–1.28 > 0.20
    Trust 0.39–0.47 -0.36 -3.76 < 0.001 0.02–0.13 -0.13–1.50 > 0.12 0.02–0.13 -0.13–1.50 > 0.12 0.02–0.13 -0.13–1.50 > 0.12
    Partner empathy 0.39–0.47 -0.37 -3.60 0.002 -0.08 -0.29 0.77 0.04 1.92 0.06 0.21 1.55 0.13
Study 1 (this paper)—Dyads only
    Relationship quality 0.10 0.16 0.75 0.456 -0.20 -1.01 0.318 0.02 0.59 0.557 0.50 2.85 0.006
    Trust (subscale) < 0.001 -0.03 -0.15 0.883 -0.10 -0.49 0.627 0.04 1.30 0.199 -0.03 -0.15 0.881
    Additional items relationship quality < 0.001 0.19 0.83 0.413 -0.12 -0.50 0.623 0.01 0.32 0.752 0.79 3.74 < 0.001
    Partner closeness < 0.001 0.08 0.29 0.772 -0.44 -1.44 0.156 -0.05 -1.14 0.259 0.99 3.73 < 0.001
    Partner empathy < 0.001 -0.11 -0.69 0.495 -0.23 -1.44 0.157 -0.01 -0.32 0.748 0.52 3.71 0.001
    Own empathy < 0.001 0.23 1.33 0.190 0.01 0.04 0.971 -0.01 -0.49 0.627 0.60 3.80 < 0.001
    Experience appreciation < 0.001 -0.07 -0.37 0.714 -0.07 -0.34 0.733 -0.00 -0.08 0.933 0.96 5.29 < 0.001
    Concentration < 0.001 -0.05 -0.25 0.805 -0.29 -1.48 0.146 0.03 0.98 0.332 0.55 3.13 0.003

Results for triads, and dyads and triads together, as well as detailed confidence intervals are reported in the S1 Table.

aAge and positive affect are grand-mean centered.