Table 1 Within- and between person effects of different interactions regarding different aspects of daily empathy and age predicting daily prosocial behavior.

Interaction term predicting prosocial behavior	Within-subject effects				Between-subject effects
Interaction term predicting prosocial behavior	t or z-score	Adj. p value	Estimate (SE)	Effect size (r)	t or z-score	Adj. p value	Estimate (SE)	Effect size (r)
Empathy opportunity * age group	− 2.8	0.024*	0.05	− 0.04	− 1.9	0.406	0.2	− 0.1
Empathy opportunity *age group²	2.72	0.024*	0.06	0.04
Target of empathy* age group	1.12	0.351	0.04	0.01	− 0.94	0.819	0.32	− 0.08
Empathy* age group	1.13	0.351	0.09	0.03	0.03	0.978	0.31	0
Emotion share* age group	− 1.43	0.308	0.11	− 0.04	0.81	0.819	0.33	0.07
Perspective take* age group	− 1.72	0.227	0.11	− 0.05	0.52	0.844	0.32	0.05
Compassion* age group	0.42	0.674	0.15	0.02	0.25	0.94	0.41	0.03

Interaction term predicting prosocial behavior	Chi²	Adj. p-value			Chi²	Adj. p-value
Valence^α*age group^β	0.2	0.674			0.53	0.819

Prosocial behavior was included in all models as binary outcome variable. Statistics obtained from mixed models, nested within participant and survey day. Each interaction ran in a separate model, with age as linear and quadratic term separately. Model selection was conducted based on a loglikelihood ratio test. P values were adjusted to control the false discovery rate. *p < 0.05.
^αPositive, negative, or neutral target emotion.
^βReduced random effect structure due to convergence warnings, only nested within participant.

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