Table 1.
Demographic characteristics of sample youth group members by district.
Fig 1.
Conceptual model.
Fig 2.
a. Ingroup versus outgroup trust investment. b. Net ingroup trust gain (share).
Table 2.
Ingroup and outgroup reciprocity norm distribution.
Table 3.
Summary statistics for key variables.
Fig 3.
a. Ingroup and outgroup distribution of altruistic preferences. b. Ingroup and outgroup distribution of egalitarian preferences. c. Ingroup and outgroup distribution of spiteful preferences. d. Ingroup and outgroup distribution of selfish preferences.
Fig 4.
a. Average ingroup and outgroup trust and net trust gain. b. Average ingroup and outgroup trust correlation.
Fig 5.
a. Average group leader satisfaction score distributions. b. Average youth group performance score distributions. c. Average group social relations score distributions. d. Average group polarization score distributions. e. Average group member performance score distributions.
Table 4.
Group leader satisfaction and group performance since the beginning.
Table 5.
Social relations in groups and assessment of own performance.
Table 6.
Structural equation model: Recursive system Outgroup -> Ingroup social preferences, norms, trustworthiness, and trust.
Table 7.
Estimated direct, indirect, and total effects of social preferences and norms on outgroup trustworthiness.
Table 8.
Structural equation model: With group mean proportions of social preference types and gender, age, and education.
Table 9.
Correlations between ingroup trust and five other group performance indicators.