Table 9.

Study 2: Within-Day Social Comparison Instability Predicting Average Within-Day Affect and Social Anxiety

	Positive affect				Negative affect				Social anxiety
Term	b	95% conf. int.		t	b	95% conf. int.		t	b	95% conf. int.		t
(Intercept)	48.55	40.77	56.32	12.23	7.44	3.68	11.19	3.88	9.28	2.55	16.00	2.70
Within-day SC instability	−0.09	−0.19	0.01	−1.77	0.09	0.03	0.15	2.86	0.20	0.11	0.28	4.53
Person-level mean within-day SC instability	−0.89	−1.62	−0.16	−2.38	0.43	0.07	0.79	2.37	0.46	−0.17	1.09	1.42
τ 00 Person	19.06	16.27	22.11		9.11	7.75	10.60		16.48	14.05	19.12
σ res	11.12	10.65	11.62		6.99	6.69	7.30		9.78	9.36	10.22
Marginal R2	0.060	−0.040	0.113		0.064	−0.036	0.116		0.041	−0.053	0.076
Conditional R2	0.761	0.704	0.831		0.653	0.582	0.730		0.750	0.695	0.815
Controlling for day-level mean SC favorability
(Intercept)	48.62	40.90	56.34	12.33	7.39	3.64	11.14	3.86	9.22	2.50	15.95	2.69
Within-day SC instability	0.02	−0.07	0.11	0.48	0.02	−0.04	0.08	0.70	0.12	0.03	0.20	2.80
Person-level mean within-day SC instability	−1.01	−1.74	−0.28	−2.73	0.51	0.15	0.86	2.80	0.55	−0.08	1.18	1.71
Within-day mean SC favorability	0.64	0.55	0.72	14.71	−0.40	−0.45	−0.35	−14.69	−0.47	−0.55	−0.40	−12.11
τ 00 Person	18.98	16.21	22.00		9.15	7.79	10.63		16.50	14.08	19.13
σ res	10.10	9.66	10.54		6.34	6.07	6.62		9.14	8.74	9.54
Marginal R2	0.101	0.004	0.155		0.122	0.026	0.175		0.071	−0.021	0.109
Conditional R2	0.802	0.755	0.860		0.715	0.656	0.778		0.782	0.733	0.839
N people	87				87				87
N days	1088				1088				1088

Note. Focal parameter estimates shaded in gray; SC = social comparison; b = unstandardized regression coefficient; conf. int. = confidence (compatibility) intervals constructed using profile likelihood for b, τ, and σ and empirical parametric bootstrap for R²; SC favorability scaled as POMP scores; SC instability scaled as the RMSSD between successive within-day observations; τ₀₀ = random effects standard deviation, σ = residual standard deviation.