Bowker, J. C. & Coplan, R.J. (2026). Introduction to the special section on social withdrawal during childhood and adolescence: In honor of Dr. Kenneth H. Rubin. International Journal of Behavioral Development, 50(1), 1-5. https://doi.org/10.1177/01650254251381631

Brunetti, M., Sette, S., Longobardi, E., Laghi, F., & Coplan, R.J. (2026). Young children’s perceptions of hypothetical peers’ social and solitary preferences. Early Education and Development. Advance on-line publication. https://doi.org/10.1080/10409289.2026.263431

Brunetti, M., Sette, S., Galanaki, E., De Marco, L., Laghi, F., Longobardi, E., & Coplan, R.J. (2026). Exploring definitions and experiences of loneliness: Insights from interviews with children and early adolescents in Italy. Social Development, 35(1), e73055. https://doi.org/10.1111/sode.70035

Cheng, T., Stone, A., & Coplan, R.J. (2025). Using language to test developmental differences in attitudes towards solitude in adolescents and emerging adults. Social Development, 34(3), e70010. https://doi.org/10.1111/sode.70010

DeGroot, M., Archbell, K., & Coplan, R.J. (2025). Shy like me: Exploring links between coaches’ shyness and beliefs about shy and exuberant children in a team sports context. Journal of Sport & Social Issues. Advance on-line publication. https://doi.org/10.1177/01937235251401868

Ding, X., McVarnock, A., Mingxin, L., Coplan, R.J., Ooi, L.L., Yu, J. & Sang, B. (2025). Motivations for social withdrawal and socio-emotional functioning among urban/suburban Chinese children. Journal of Applied Developmental Psychology, 98. 101787. https://doi.org/10.1016/j.appdev.2025.101787

Ladd, G., Ettekal, I., Ladd, B., & Coplan, R.J. (2025). Joint developmental trajectories of anxious solitude and peer adversity from early childhood through adolescence: Characteristics and associations with indices of internalizing problems. Developmental Psychology, 61(2), 397-416). https://doi.org/10.1037/dev0001848

Li, M., Yu, J., Coplan, R.J., Bowker, J.C., Xu, G., & Ding, X. (2025). The significance of best friends’ motivations for social withdrawal: Associations with socio-emotional adjustment in Chinese children and adolescents. Journal of Research on Adolescence, 35(1), e13043. https://doi.org/10.1111/jora.13043

McVarnock, A.M., Coplan, R.J., White, H., & Bowker, J.C. (2025). Looking beyond time alone: An examination of solitary activities in emerging adulthood. Journal of Personality [Personality Processes in Positive Solitude: A Special Issue of Registered Reports], 93(1), 81-100. https://doi.org/10.1111/jopy.12905

Refol, J., Raufi, S., Delgado-Ron, J.A., Mulligan, K., Hill, T.G., Benoit, C., Coplan, R.J., Pinel, E.C., Skakoon-Sparling, S., Helm, P.J., Oliffe, J.L., Bombaci, P., & Card, K.G. (2025).  Diverse community perspectives on potential public health guidelines for social connection: A qualitative study in Canada. Health Promotion International, 40, daaf131. https://doi.org/10.1093/heapro/daaf131

Sette, S., Brunetti, M., Pecroa. G. & Coplan, R.J. (2025). Examining links between motivations for social withdrawal, time spent alone, and indices of internalizing problems in childhood and early adolescence. Journal of Early Adolescence, 45(6), 769-793. https://doi.org/10.1177/02724316241279003

Sette, S. Coplan, R.J., Ooi, L., Zuffianò, A., Xiao, G., Wong, Q.J.J., Rapee, R.M., Oh, W., Liu, J., Kim, Y., Kim, H.K., Kamble, S., Greco, C., Dogan, A., Castillo, K.N., Braathu, N., Bølstad, E., Bayram-Ozdemir, S., & Bowker, J.C. (2025). Measurement invariance of the straightforwardly-worded Social Interaction Anxiety Scale and associations with life satisfaction among emerging adults attending university in 10 countries. Journal of Anxiety Disorders, 116, 103092. https://doi.org/10.1016/j.janxdis.2025.103092

Stone, A., Cheng, T., & Coplan, R.J. (2025). I speak to the trees because nature is my friend: Conceptualization and assessment of connection to nature in solitude. Health and Place [Special Issue: Loneliness and the Built Environment]. Advance-online publication. https://doi.org/10.1016/j.healthplace.2025.103499

Stone, A., DeGroot, M., McVarnock, A., Cheng, T., Bowker, J.C., & Coplan, R.J. (2025). The risks of being a wallflower: Exploring links between introversion, aspects of solitude, and indices of well-being in adolescence. Behavioral Sciences [Special Issue – Social Behaviors in Childhood: Causes and Consequences], 15(2), 108. https://doi.org/10.3390/bs15020108

Zava, F., Sette, S., Vecchio, G.M., Laghi, F., Baumgartner, E., & Coplan, R.J. (2025). Exploring links between social competence, immigrant background, and children’s preschool adjustment. Early Education & Development, 36(2), 343-363. https://doi.org/10.1080/10409289.2024.2389367

Xiao, B., Parent, N., Coplan, R.J., & Shapka, J.D. (2025). How do young adults feel about receiving “likes” on social media? The moderating roles of shyness and cyber-victimization. Emerging Adulthood. Advance-online publication. https://doi.org/10.1177/21676968251367493

Abidin, F., Sunardy, G.N., Yudiana, W., Alverina, Y., & Coplan, R.J. (2024). Assessment and correlates of aloneliness among Indonesian adolescents. Heliyon, 10(7), e28862. https://doi.org/10.1016/j.heliyon.2024.e28862

Brunetti, M., Sette, S., Cheng, T., Laghi, F., Longobardi E., Pastorelli, C., Zuffianò, & Coplan, R.J. (2024). Solitary groups: A latent profile analysis of motivations for social withdrawal and experiences of solitude in late childhood and early adolescence. Social Development, 33(4), e12742. https://doi.org/10.1111/sode.12742

Brunetti, M., Sette, S., Longobardi, E., Laghi, F., & Coplan, R.J. (2024). Loneliness and aloneliness as mediators of the associations between social withdrawal and internalizing problems in late childhood and early adolescence. Journal of Early Adolescence, 44(6), 790-814. https://doi.org/10.1177/02724316231207282

Coplan, R.J., Weingarten, J.P., Bowker, J.C., Ooi, L.L., & Archbell, K. (2024). Maternal beliefs about the costs and benefits of solitude in childhood and adolescence. Journal of Child and Family Studies, 33(5), 1517-1530. https://doi.org/10.1007/s10826-023-02713-x

McVarnock, A., Cheng, T., Stone, A., DeGroot, M. & Coplan, R.J. (2024). The development of social withdrawal research in childhood and adolescence over 70 years: A systematic scoping review. Merrill-Palmer Quarterly, 70(2), 189-217.

Nyborg, G., Mjelve, L.H., Coplan, R.J., Edwards, A., & Crozier R. (2024). Exploring Norwegian teachers’ perceptions of shy students at recess and their strategic responses. Advance on-line publication. International Journal of Inclusive Education. https://doi.org/10.1080/13603116.2024.2343089

Nyborg, G., Mjelve, L.H., Crozier, W.R., Arneson, A., Coplan, R.J., & Edwards, A. (2024). Teachers’ strategies for helping shy students: Findings from a national survey in Norway. Scandinavian Journal of Educational Research, 68(5), 1011-1024. https://doi.org/10.1080/00313831.2023.2196534 

Bekkhus, M., McVarnock, A., Coplan, R.J., Ulset, V., & Kraft, B. (2023). Developmental changes in the structure of shyness and internalizing symptoms from early to middle childhood: A network analysis. Child Development, 94(4), 1078-86. https://doi.org/10.1111/cdev.13906

Bowker, J.C., Sette, S., Ooi, L.L., Bayram-Ozdemir, S., Braathu, N., Bølstad, E., Castillo, K.N., Dogan, A., Greco, C. Kamble, S., Kim, H.K., Kim, Y., Liu, J., Oh, W., Rapee, R.M., Wong, Q.J.J., Xiao, B, Zuffianò, A, & Coplan, R.J. (2023). Cross-cultural measurement of social withdrawal motivations across ten countries using multiple-group factor analysis alignment. International Journal of Behavioral Development, 47(2), 190-198. https://doi.org/10.1177/01650254221132774

Deng, X., Zhang, S., Chen, X., Coplan, R.J., Xiao, B., & Ding, X. (2023). Links between social avoidance and frontal alpha asymmetry during processing emotional facial stimuli: An exploratory study. Biological Psychology, 178, 108516. https://doi.org/10.1016/j.biopsycho.2023.108516

Ding, X., Zhang, W., Ooi, L.L., Coplan, R.J., Zhu, X., & Sang, B. (2023). Relations between social withdrawal subtypes and socio-emotional adjustment among Chinese children and early adolescents. Journal of Research on Adolescence, 33(3), 774-785. https://doi.org/10.1111/jora.12837

McVarnock, A.M., Cheng, T., Polakova, L., & Coplan, R.J. (2023). Are you alone? Measuring solitude in childhood, adolescence, and emerging adulthood Frontiers in Psychiatry, 14. [Special Issue: Causes & Consequences of Solitude in Childhood and Adolescence]. https://doi.org/10.3389/fpsyt.2023.1179677

Sette, S., Zava, F., Baumgartner, E., Laghi, F., & Coplan, R.J. (2023). Examining links between social withdrawal subtypes and internalizing problems among Italian primary school children. European Journal of Developmental Psychology, 20(2), 268-286. https://doi.org/10.1080/17405629.2022.2086118

Sette, S., Zava, F., Laghi, F., Baumgartner, R., & Coplan, R.J. (2023). Linking social relationships at school, loneliness, and academic self-perceptions among primary school children. Journal of Applied Developmental Psychology, 88, 101588. https://doi.org/10.1016/j.appdev.2023.101568

Sun, Y., Bowker, J.C., Coplan, R.J., Liu, J., & Sang, B. (2023). Best friend’s popularity: Associations with psychological well-being and school adjustment in China during early adolescence. Journal of Youth and Adolescence, 52(3), 670-683. https://doi.org/10.1007/s10964-022-01719-w

Tsotsi, S., Goh, S., Coplan, R.J., Bølstad, E., Czajkowski, N. O., Smajlagic, D., & Bekkhus, M. (2023). Co-occurrence of internalizing difficulties and aggression in early childhood and risk of mental health problems in middle childhood. International Journal of Behavioral Development, 47(5), 384-396. https://doi.org/10.1177/01650254231187902

Xiao, B., Zhu, L., Kong, X., Li, Y. & Coplan, R.J. (2023). Shyness and socio-emotional adjustment in early childhood in mainland China: Exploring the roles of maternal parenting practices and beliefs about shyness. Journal of Child and Family Studies, 32(3), 833-845. https://doi.org/10.1007/s10826-022-02416-9

Yang, P., Coplan, R.J., Zhang, Y., Ding, X., & Zhu, Z. (2023). Assessment and implications of aloneliness in Chinese children and early adolescents. Journal of Applied Developmental Psychology, 85, 101514. https://doi.org/10.1037/cbs0000369

Zheng, K., Coplan, R.J., Chen, X., & Bian, Y. (2023). Longitudinal associations between depressive symptoms and preference for solitude among Chinese early adolescents: Separating between-person from within-person effects. Journal of Early Adolescence, 43(6), 784-814. https://doi.org/10.1177/02724316221124794

Zheng, K., Coplan, R.J., Teng, Z., Liang, L., Chen, X., & Bian, Y. (2023). How does interparental conflict affect adolescent preference for solitude? Depressive symptoms as mediator at between- and within-person levels. Journal of Family Psychology, 37(2), 173-182. https://doi.org/10.1037/fam0001057