Fig. 8
Red circle indicates Averaged SHS. Blue circles indicate variables directly correlated with Averaged SHS. Numbers on the right side of the edges indicate the partial correlation coefficients. Red lines indicate the edges positively correlated with Averaged SHS. Blue lines indicate edges negatively correlated with Averaged SHS. Black lines indicate the edge not directly connected with Averaged SHS. Variables not connected by edges had a partial correlation coefficient of 0 according to the covariance selection criteria. This indicates that variables not connected by edges are conditionally independent. (a) Undirected graph of high school diploma or less (n = 323), (b) Undirected graph of a vocational school or a junior college (n = 125) and (c) Undirected graph of bachelor or higher (n = 65).
