Table 1.
Survey Question.
Table 2.
Types of ties when two types of individuals are present.
Table 3.
Mean scores, standard deviation and ranges on prosociality.
Fig 1.
Directed friendship network in a South Korean high school.
Circles and arrows show individuals and friendship, respectively. The diameter of the circle shows relative level of individual prosociality (online version in color).
Table 4.
Mixing matrix between different levels of prosociality.
Table 5.
ERGM terms, with descriptive names and brief definitions.
Table 6.
Parameterization of the exponential random graph model (ERGM).
Table 7.
ERGM estimates (model 1).
Fig 2.
Contour plot for the prosocial edge covariate for ERGM 2.
The numbers on the x and y axes correspond to the prosociality scores of the actors i and j and the corresponding point in the matrix represents the edgecov value for dyad (i, j), which equals the square root of the product of the two actors’ prosociality.
Table 8.
ERGM estimates (model 2).