Dyadic Dynamic in Generalized Political Attitudes: Homophily, Relationship Satisfaction, and Convergence

CONSTRUCT	SCALE	AUTHORS	TRANSLATION
Conspiracy Mentality	Conspiracy Mentality Scale (CMS)	Imhoff and Bruder (2014)	Original Scale Authors
Right-Wing Authoritarianism	Authoritarianism Short Scale (KSA-3)	Beierlein et al. (2015)	Nießen et al. (2019)
Social Dominance Orientation	SDO_7(S) scale	Ho et al. (2015)	Aichholzer (2019), Six et al. (2001), Study Authors
Political Orientation	Left-Right Self-Placement scale	GESIS-Leibniz-Institut Für Sozialwissenschaften (2019)	Original Scale Authors
Relationship Quality	Revised Dyadic Adjustment Scale (RDAS)	Busby et al. (1995)	Study Authors
Values	Human Values Scale (HVS)	Schwartz et al. (2015)	Original Scale Authors

[i] Note. In addition, participants were asked to provide their gender, age, highest attained level of education, as well as their country of residence. We also preregistered and measured vaccination against COVID-19 and relationship dissolution, but both variables displayed almost no variance and were thus not analyzed further.

Table 2

Means, variances, reliabilities, and intercorrelations of study variables.

	α	M	SD	1	2	3	4	5	6	7
1. CM	.91	3.63	1.18	(.85)
2. RWA	.83	2.32	0.67	.30***	(.80)
3. SDO	.76	2.74	1.00	.28***	.45***	(.78)
4. POL	–	4.20	1.71	.22***	.43***	.53***	(.83)
5. ST-SE	.67	1.26	1.18	–.10	–.25***	–.40***	–.35***	(.78)
6. OP-CO	.66	0.68	1.11	.01	–.29***	–.14*	–.08	.03	(.77)
7. RQ	.80	51.94	6.56	–.15*	–.15*	–.12	–.08	.21***	.11	(.81)

[i] Note. N_{T1_ind} = 498. CM: Conspiracy mentality, RWA: Right-wing authoritarianism, SDO: Social dominance orientation, POL: Political orientation, ST-SE: Self-transcendence vs. self-enhancement, OP-CO: Openness to change vs. conservation, RQ: Relationship quality, α: Internal consistency (Cronbach’s alpha). Retest reliabilities are shown on the diagonal (N_{T2_ind} = 200).

*p < .05, **p < .01, ***p < .001.

Table 3

Cross-partner correlations and significance tests.

	ICC	95% CI	F(248, 249)	p
Conspiracy Mentality	.51	[.42, .60]	3.10	<.001
Right-Wing Authoritarianism	.41	[.30, .51]	2.40	<.001
Social Dominance Orientation	.33	[.21, .43]	1.97	<.001
Political Orientation	.49	[.39, .58]	2.96	<.001
Self-Transcendence vs. Self-Enhancement	.26	[.14, .37]	1.70	<.001
Openness to Change vs. Conservation	.22	[.10, .33]	1.56	<.001

[i] Note. N_T1 = 249. ICC: Intraclass correlation coefficient, CI: Confidence interval. Significance tests (p values) were adjusted for multiple comparisons using the Holm-Bonferroni correction.

Table 4

Results of the DRSAs for concurrent relationship quality.

	CONSPIRACY MENTALITY	RWA	SDO	POLITICAL ORIENTATION
b₁	–0.12** (0.05)	–0.13* (0.05)	–0.10* (0.05)	–0.05 (0.05)
b₂	–0.08 (0.05)	–0.07 (0.05)	–0.09* (0.05)	–0.05 (0.05)
b₃	0.08 (0.05)	–0.04 (0.04)	0.01 (0.04)	–0.03 (0.05)
b₄	0.04 (0.08)	0.12 (0.08)	0.00 (0.06)	0.06 (0.09)
b₅	0.01 (0.06)	–0.08 (0.04)	0.04 (0.03)	–0.02 (0.05)
a₁	–0.21** (0.07)	–0.19* (0.09)	–0.20* (0.08)	–0.10 (0.08)
a₂	0.12 (0.09)	0.01 (0.05)	0.05 (0.07)	0.01 (0.09)
a₃	–0.04 (0.06)	–0.06 (0.05)	–0.01 (0.04)	0.00 (0.05)
a₄	0.05 (0.16)	–0.23 (0.15)	0.05 (0.11)	–0.12 (0.17)
a₅	0.06 (0.04)	0.04 (0.04)	–0.03 (0.03)	–0.01 (0.03)

[i] Note. N_T1 = 249. Standard errors in parentheses. Regression estimates can be interpreted as β weights due to prior standardization. b₁: linear actor effect, b₂: linear partner effect, b₃: squared actor effect, b₄: interaction effect, b₅: squared partner effect, a₁ = b₁ + b₂, a₂ = b₃ + b₄ + b₅, a₃ = b₁ – b₂, a₄ = b₃ – b₄ + b₅, a₅ = b₃ – b₅.

*p < .05, **p < .01, ***p < .001.

Conspiracy mentality and concurrent relationship quality.
*Note. N*_T1 = 249. CM: Conspiracy mentality.

RWA and concurrent relationship quality.
*Note. N*_T1 = 249. RWA: Right-wing authoritarianism.

Table 5

Results of the DRSAs for longitudinal relationship quality.

	CONSPIRACY MENTALITY	RWA	SDO	POLITICAL ORIENTATION
b₁	–0.09 (0.09)	–0.02 (0.10)	–0.03 (0.09)	–0.10 (0.09)
b₂	–0.09 (0.08)	–0.15 (0.11)	–0.08 (0.10)	0.03 (0.10)
b₃	–0.13 (0.09)	–0.14 (0.11)	–0.03 (0.06)	–0.03 (0.06)
b₄	0.33* (0.13)	0.25* (0.12)	0.02 (0.11)	0.04 (0.09)
b₅	0.00 (0.08)	–0.11 (0.08)	0.03 (0.11)	0.01 (0.07)
a₁	–0.18 (0.09)	–0.17 (0.13)	–0.10 (0.14)	–0.08 (0.12)
a₂	0.21* (0.10)	–0.01 (0.11)	0.02 (0.15)	0.01 (0.09)
a₃	0.00 (0.15)	0.14 (0.17)	0.05 (0.13)	–0.13 (0.15)
a₄	–0.45 (0.26)	–0.50* (0.23)	–0.01 (0.22)	–0.06 (0.17)
a₅	–0.13 (0.08)	–0.03 (0.14)	–0.06 (0.10)	0.04 (0.09)

[i] Note. N_T2 = 76. Standard errors in parentheses. Regression estimates can be interpreted as β weights due to prior standardization. b₁: linear actor effect, b₂: linear partner effect, b₃: squared actor effect, b₄: interaction effect, b₅: squared partner effect, a₁ = b₁ + b₂, a₂ = b₃ + b₄ + b₅, a₃ = b₁ – b₂, a₄ = b₃ – b₄ + b₅, a₅ = b₃ – b₅.

*p < .05, **p < .01, ***p < .001.

Table 6

Means, variances, reliabilities, and intercorrelations of study variables.

	α	M	SD	1	2	3	4	5	6	7
1. CM	.92	4.58	1.12	(.82)
2. RWA	.86	2.65	0.73	.14*	(.79)
3. SDO	.89	2.66	1.22	.13*	.41***	(.82)
4. POL	–	4.59	2.09	.04	.47***	.50***	(.88)
5. ST-SE	.83	1.16	1.25	–.11	–.29***	–.43***	–.30***	(.83)
6. OP-CO	.82	0.15	1.02	.10	–.31***	–.13*	–.24***	–.17***	(.81)
7. RS	.89	5.30	0.79	–.07	–.01	–.11	–.05	.08	.04	(.77)

[i] Note. N_{T1_ind} = 624. CM: Conspiracy mentality, RWA: Right-wing authoritarianism, SDO: Social dominance orientation, POL: Political orientation, ST-SE: Self-transcendence vs. self-enhancement, OP-CO: Openness to change vs. conservation, RS: Relationship satisfaction, α: Internal consistency (Cronbach’s alpha). Retest reliabilities are shown on the diagonal (N_{T2_ind} = 558).

*p < .05, **p < .01, ***p < .001.

Table 7

Cross-partner correlations and significance tests.

	ICC	95% CI	F(311, 312)	p
Conspiracy Mentality	.49	[.40, .57]	2.90	<.001
Right-Wing Authoritarianism	.47	[.38, .56]	2.80	<.001
Social Dominance Orientation	.57	[.49, .64]	3.69	<.001
Political Orientation	.66	[.59, .72]	4.83	<.001
Self-Transcendence vs. Self-Enhancement	.25	[.14, .35]	1.66	<.001
Openness to Change vs. Conservation	.36	[.26, .45]	2.12	<.001

[i] Note. N_T1 = 312. ICC: Intraclass correlation coefficient, CI: Confidence interval. Significance tests (p values) were adjusted for multiple comparisons using the Holm-Bonferroni correction.