Although numerous studies have found that maternal anxiety is a risk factor for the development of children’s problem behaviors, and there is a possible role of genes in the association between the two. And anxious mothers caring for their children can also affect the development of children’s problem behaviors. However, there is also considerable evidence from studies that refute this view. This study used a meta-analysis to explore the relationship between maternal anxiety and preschool children’s problem behaviors. Through literature retrieval and selection, in terms of the criteria for inclusion in the meta-analysis, 88 independent effect sizes (34 studies, 295,032 participants) were picked out as meta-analysis units. The test for heterogeneity illustrated that there was significant heterogeneity in 88 independent effect sizes, while the random effects model was an appropriate model for the subsequent meta-analysis. The publication bias test indicated that the impact of publication bias was modest but the major findings remained valid. In addition, in terms of the tentative review analysis and research hypotheses, the random effects model was used as a meta-analysis model. The research revealed that maternal anxiety was significantly positively correlated with preschool children’s internalizing problem behaviors, externalizing problem behaviors, and overall problem behaviors. The moderating effect analysis showed that region and gender of the child affected the relationship between maternal anxiety and children’s internalizing problem behaviors and externalizing problem behaviors, and region, child’s age and gender, mother’s age, and education level affected maternal anxiety and preschool children’s problems behavioral relationship. Hence, these results affirmed the role of maternal anxiety and emphasized the need to pay attention to the demographic characteristics and cultural background of the subjects during the research process and consider the generalizability of the conclusions under different circumstances.

ObjectiveThis study aimed to investigate the multiple mediating effects of achievement motivation and subjective wellbeing between social support and individual occupational identity.MethodsQuestionnaire method was used in this study. 565 junior college students majoring in pre-school education were tested by social support scale, achievement motivation scale, subjective wellbeing scale, and occupational identity scale.Results(1) There isn’t significant relationship between perceptions of social support and individual occupational identity. (2) Achievement motivation and subjective wellbeing individually play a mediating role between social support and individual occupational identity. (3) Achievement motivation and subjective wellbeing play a chain mediating effect between elf-efficacy and individual occupational identity.ConclusionSocial support can indirectly predict professional identity of pre-school “would-be teachers” through the mediating effect of achievement motivation, subjective wellbeing and the chain mediating effect of achievement motivation and subjective wellbeing.

To solve the problem of easy delamination of the interface of Al/CFRP/Al laminate (CFRP, carbon fiber composite; Al, aluminum), a method of constructing high strength and toughness at the interface is proposed. The effects of adding resin and carbon nanotubes at the interface on the shear, flexural strength and impact resistance of Al/CFRP/Al laminates are studied. Experimental results show that gullies and micropores can be formed on the surface of aluminum after pretreatment, and the contact area between aluminum and matrix can be increased. After resin is added to the Al/CFRP interface, the shear strength between layers and the bending strength and impact resistance of laminates are improved. Mixing carbon nanotubes into the added resin will further improve the mechanical properties of laminates. On the basis of strengthening and toughening the Al/CFRP interface, the carbon nanotubes added between the CFRP layers can strengthen and toughen the resin at the interface, which enhances the bending strength and impact resistance of the laminates. When the resin between the layers breaks, the carbon nanotubes will be pulled off and pulled out to resist the damage of the resin, and the carbon nanotubes at the end of the crack can hinder the propagation of the cracks.

The present study explored heterogeneity in the association between engaged living (i.e., social integration and absorption) and problematic Internet use (PIU). This study included 641 adolescents from four junior-senior high schools of Guangzhou, China. Besides the standard linear regression analysis, mixture regression analysis was conducted to detect certain subgroups of adolescents, based on their divergent association between engaged living and PIU. Sex, age, and psychological need were further compared among the latent subgroups. The results showed that a mixture regression model could account for more variance of PIU than a traditional linear regression model, and identified three subgroups based on their class-specific regression of PIU to engaged living. For the High-PIU class, lower social integration and higher absorption were associated with increased PIU; for the Medium-PIU class, only high social integration was linked with the increase of PIU. For the Low-PIU class, no relation between engaged living and PIU were found. Additionally, being male or having a lower level of satisfied psychological needs increased the link between engaged living and PIU. The results indicated a heterogeneous relationship between engaged living and PIU among adolescents, and prevention or intervention programs should be tailored specifically to subgroups with moderate or high levels of PIU and to those with lower levels of psychological needs’ satisfaction, as identified by the mixture regression model.

BackgroundThe healthy development of preschool education requires the support of stable and high-quality preschool teachers. However, there are still many deficiencies in preschool teachers in China at present. For pre-service kindergarten teachers, it is very significant to improve their career adaptability and enter professional positions smoothly. Numerous studies have found the effect of professional identification on the career adaptability of pre-service kindergarten teachers, but few studies have explored the potential influencing mechanisms among variables. On the basis of previous studies, this study explores the chain mediating effect of teacher efficacy and self-leadership on the relationship between professional identification and career adaptability of pre-service kindergarten teachers.MethodsThree hundred eighty-eight participants were recruited from two schools in Zhejiang Province. After screening, 377 questionnaires for pre-service kindergarten teachers were used for data analysis. The questionnaire included self-reported demographic information, professional identification, teacher efficacy, self-leadership, and career adaptability. We collected information on variables by using PISNS, TSE, RSLQ, and CFI, and analyzed the data using SPSS.Results(1) Professional identification and career adaptability have a significant positive correlation. (2) The influence of occupational identification on the career adaptability of pre-service kindergarten teachers was carried out in three different ways: professional identification → teacher efficacy → career adaptability, professional identification → self-leadership → career adaptability, and professional identification → teacher efficacy → self-leadership → career adaptability.ConclusionTeacher efficacy and self-leadership may mediate the relationship between professional identification and career adaptability of pre-service kindergarten teachers. This study highlighted the complexity of the link between preschool teachers’ professional identification and career adaptability. The paper also discussed the limitations and implications of this study.