“…In the United States, 8‐year olds’ shyness and unsociability positively correlated (medium effect size for self‐report; large effect sizes for peer, parent, and teacher reports; Spangler & Gazelle, ). In early adolescence, shyness and unsociability positively correlated for self‐reports in the United States, India, Finland, and China (medium effect sizes; Barstead et al, ; Bowker & Raja, ; Ding et al, ; Ojanen, Findley‐Van Nostrand, Bowker, & Markovic, ; Sang et al, ; Zhang & Eggum‐Wilkens, ), and for peer nominations in China (medium effect sizes; Liu et al, ; Zhang & Eggum‐Wilkens, ). Finally, U.S. college students’ self‐reported shyness and unsociability positively correlated (medium effect sizes; Bowker et al, ; Nelson, ).…”