Relationship between Materialism and Social Networking Site Addiction among Adolescents: A Moderated Mediation Model.

Materialism has been consistently linked to Internet-related addictions, including compulsive online shopping, problematic online gaming, and excessive smartphone use; however, the relationship between materialism and social networking site (SNS) addiction has remained unclear. Thus, this study aims to examine the association between materialism and SNS addiction and investigate the mediating effect of fatalism and moderating effect of self-concept clarity in this relationship among 703 Chinese adolescents. Materialism was significantly positively associated with SNS addiction in adolescents, and fatalism partially mediated this association. Moreover, self-concept clarity moderated the direct and indirect relationships between materialism and SNS addiction. Specifically, for adolescents with low (versus high) self-concept clarity, those who also had high levels of materialism were more likely to develop fatalistic beliefs and showed further symptoms of SNS addiction. This study's findings imply that decreasing materialism and fatalism and developing self-concept clarity might be effective interventions for reducing SNS addiction among adolescents.

Body talk on social networking sites and restrained eating among adolescents: A test of a multiple mediation model.

The present study aimed to examine the link between body talk on social networking sites (SNS body talk) and restrained eating as well as the mediating roles of fear of negative appearance evaluation (FNAE) and body shame in this relationship. Furthermore, the moderating role of gender in the mediation model was also examined. A sample of 1481 Chinese middle and high school students (720 girls, mean age = 15.49 ± 1.84) completed self-reported measures of SNS body talk, FNAE, body shame, and restrained eating. Results showed that SNS body talk was positively associated with restrained eating. FNAE and body shame mediated the association between SNS body talk and restrained eating, separately and serially. Furthermore, gender difference emerged in the path from SNS body talk to body shame and the path from FNAE to body shame. Findings of the present study enrich the literature on social media and body image and eating behaviors, and have important implications for reducing negative body image and disordered eating among adolescents.

Meaning in Life and Self-Control Mediate the Potential Contribution of Harsh Parenting to Adolescents' Problematic Smartphone Use: Longitudinal Multi-Group Analyses.

Problematic smartphone use (PSU) has become an increasingly serious social issue that gradually impairs adolescents' daily social functioning. This study aimed to examine the potential contribution of harsh parenting (HP) to PSU by testing a two-mediator model in which meaning in life (MIL) and self-control (SC) were hypothesized to be two mediators. The moderating role of gender was also examined. Eight hundred and twenty-eight middle school students from rural areas in China (mean age = 13.04) reported on harsh parenting, MIL, self-control, and PSU. Both parents also reported on each other's harsh parenting and their child's self-control. Multi-group structural equation modeling analyses revealed gender differences in the association patterns among the model variables. Harsh parenting was only indirectly associated with PSU for both boys and girls. MIL and self-control completely mediated the relation between harsh parenting and PSU in sequential manners for boys and girls. And for boys, beyond the common path from harsh parenting to PSU, another indirect path existed from harsh parenting to self-control to PSU. But jointly, MIL and self-control precipitate more indirect effects for girls than for boys in the association between harsh parenting and PSU. Findings suggested that harsh parenting was detrimental to adolescents' MIL and self-control, which enhances their risk for PSU, especially for girls. These findings provide more insights for efforts to prevent adolescents from PSU.

Rapid Synthesis of Diesel Precursors from Biomass-Derived Furanics Over Aluminum-Doped Mesoporous Silica Sphere Catalysts.

The condensation of biomass-derived molecules has been increasingly utilized as a sustainable strategy for the preparation of high-carbon precursors for high-density fuels, thus stimulating the demand for more efficient catalysts. This study concerns the synthesis of an aluminum-doped mesoporous silica sphere (Al-MSS) catalyst for the conversion of biobased furfural and 2-methylfuran into a C15 diesel precursor through a hydroxyalkylation/alkylation (HAA) reaction. A series of Al-MSS catalysts with different Si/Al ratios and calcination temperatures is prepared and extensively characterized, among which Al-MSS20-450 (Si/Al=20 : 1, calcined at 450 °C) exhibits unprecedentedly high reaction efficiency in catalyzing HAA reaction, offering a 94 % product yield at 140 °C in 20 min. The catalyst also gives high product yields across a broad temperature range from 80 °C to 140 °C with varied reaction time. Reaction kinetics reveal that both competitive substrate adsorption and temperature-dependent system viscosity affect the reaction efficiencies. Correlations between the catalytic activity and surface acid sites disclose that moderate and strong acid sites are primarily responsible for catalysis. Brønsted and Lewis acid sites are found by poisoning assays to work synergistically to catalyze the reaction, with the former being the primary sites. Finally, the catalyst displays good recycling performance, which further highlights its potential for industrial application.

"I wanna look like the person in that picture": Linking selfies on social media to cosmetic surgery consideration based on the tripartite influence model.

Based on the tripartite influence model, the present study linked investment in others' selfies on social media to facial dissatisfaction and cosmetic surgery consideration. We also tested the mediating role of appearance comparisons and general attractiveness internalization in these relationships. Additionally, potential gender differences in the proposed model were examined. A sample of 884 Chinese adolescents (mean age = 16.80 ± 0.92, ranging from 14 to 19 years old) completed self-reported measures of investment in others' selfies, appearance comparisons, general attractiveness internalization, facial dissatisfaction, and cosmetic surgery consideration. Results showed that investment in others' selfies was positively associated with facial dissatisfaction and cosmetic surgery consideration. Path analysis further revealed that investment in others' selfies was associated with appearance comparisons and general attractiveness internalization, which in turn were associated with facial dissatisfaction, and then facial dissatisfaction was related to cosmetic surgery consideration. Additionally, there were indirect associations between investment in others' selfies and cosmetic surgery consideration via general attractiveness internalization and facial dissatisfaction respectively, but not via appearance comparisons. No gender difference was found in the proposed model. Findings of the present study provide preliminary support for the tripartite influence model in the context of investment in others' selfies on social media and cosmetic surgery consideration and enrich the literature on body image and cosmetic surgery in the Chinese context.

The Relationship between Cyber-Ostracism and Adolescents' Non-Suicidal Self-Injury: Mediating Roles of Depression and Experiential Avoidance.

Based on the experiential avoidance model, the current study aims to test the relationship between cyber-ostracism and adolescents' non-suicidal self-injury and to explore the mediating roles of depression and experiential avoidance. A sample of 1062 middle school students completed questionnaires on cyber-ostracism, depression, experiential avoidance, and self-injurious behavior. The results showed that cyber-ostracism, depression, experiential avoidance, and non-suicidal self-injury were positively correlated with each other. After controlling for gender and age, the mediation model test shows that cyber-ostracism was significantly and positively associated with non-suicidal self-injury. Depression and experiential avoidance mediated the relationship between cyber-ostracism and non-suicidal self-injury parallelly and sequentially. This study highlights the potential mechanisms of action between cyber-ostracism and adolescent non-suicidal self-injury and finds that cyber-ostracism is a risk factor for non-suicidal self-injury. This founding suggests that extra attention should be paid to the role of the online environment in addition to the offline environment experiences for the intervention of non-suicidal self-injury.

The relationship between childhood maltreatment and adolescents' cyberbullying victimization: The new phenomenon of a "cycle of victimization".

BACKGROUND: The research community is showing an increasing concern about the adverse outcomes of childhood maltreatment for adolescents. However, whether childhood maltreatment is associated with cyberbullying victimization and what the underlying mechanisms of this relationship are remain to be identified. OBJECTIVE: We aimed to examine the relationship between childhood maltreatment and cyberbullying victimization and whether self-compassion and fear of missing out (FoMO) can simultaneously moderate this relationship among adolescents. PARTICIPANTS AND SETTING: A sample of 1025 Chinese adolescents (50.8 % male participants, age = 15.50 ± 0.52 years) completed questionnaires regarding childhood maltreatment, cyberbullying victimization, self-compassion, and FoMO. METHODS: Our hypotheses were tested by correlation analysis and Model 3 of the PROCESS macro. RESULTS: Childhood maltreatment significantly predicted adolescents' cyberbullying victimization (ß = 0.28, p < .001). High self-compassion weakened the relationship between childhood maltreatment and cyberbullying victimization (ß = -0.10, p < .001). Furthermore, self-compassion and FoMO simultaneously interacted with childhood maltreatment to predict cyberbullying victimization (ß = 0.08, p < .001). Specifically, high FoMO weakened the moderating effect of self-compassion on the relationship between childhood maltreatment and cyberbullying victimization. Childhood maltreatment significantly predicted cyberbullying victimization among adolescents high in FoMO, regardless of self-compassion levels. In contrast, childhood maltreatment non-significantly predicted cyberbullying victimization when adolescents were high in self-compassion and low in FoMO. CONCLUSIONS: Childhood maltreatment is positively associated with cyberbullying victimization. Moreover, increasing self-compassion and decreasing FoMO can mitigate the effect of childhood maltreatment on cyberbullying victimization.

How is Father Phubbing Associated with Adolescents' Social Networking Sites Addiction? Roles of Narcissism, Need to Belong, and Loneliness.

OBJECTIVE: Parents' phubbing has been found to be positively associated with adolescents' internet-related addiction. However, it remains unknown whether father phubbing would influence adolescents' social networking sites addiction (SNSA), and the mechanisms underlying this association stays largely unknown. This study aims to expand previous research by testing the mediating effect of loneliness, as well as the moderating effects of narcissism and need to belong in the association between father phubbing and adolescents' SNSA. METHOD: In a cross-sectional design, 4,172 participants (2,189 boys and 1,983 girls; Mage = 16.41 ± .77) from 5 high schools in China completed measures of demographic variables, father phubbing, loneliness, narcissism, need to belong, and SNSA. RESULTS: Results from regression analyses found that (a) Father phubbing had a positive association with adolescents' SNSA; (b) Loneliness partially mediated this association; (c) Narcissism and need to belong concurrently moderated the association between father phubbing and loneliness. In particular, the effect of father phubbing on loneliness was weaker among students with high narcissism, and among students with low need to belong. CONCLUSIONS: The findings enrich our understanding of how father phubbing may increase the risk of SNSA among adolescents, and underscore the potential importance of reducing father phubbing and loneliness to prevent adolescents' SNSA.

Does childhood maltreatment increase the subsequent risk of problematic smartphone use among adolescents? A two-wave longitudinal study.

There is a lack of longitudinal data on the relationship between childhood maltreatment and problematic smartphone use and its underlying mechanisms. Therefore, this study aimed to examine the relationship between childhood maltreatment and adolescent problematic smartphone use and explore the mediating effects of basic psychological needs and self-compassion in this relationship. We employed a two-wave longitudinal design among 890 Chinese adolescents (49.0% males, mean age at Time 2 = 15.96 ± 0.46 years). They completed the Childhood Trauma Questionnaire and the Smartphone Application-Based Addiction Scale at Time 1, and the Basic Need Satisfaction Scale, the Self-Compassion Scale, and the Smartphone Application-Based Addiction Scale at Time 2. The results indicated that prior maltreatment experiences positively predicted adolescents' subsequent problematic smartphone use (p < .001); and basic psychological needs satisfaction and self-compassion did not parallelly mediate the relationship between prior maltreatment experiences and subsequent problematic smartphone use. Finally, basic psychological needs satisfaction and self-compassion completely and sequentially mediated the relationship between prior maltreatment experiences and subsequent problematic smartphone use. Interventions that target students engaging in problematic smartphone use should focus on reducing childhood maltreatment and improving their psychological needs satisfaction and self-compassion.

Perceived Parental Acceptance and Cyberbullying Perpetration among Chinese Adolescents: Moderated Mediation Models of Materialism and Insecure Attachment.

Cyberbullying perpetration (CP) is a common and devastating network deviation behavior. Some parenting factors for CP have been identified, but few studies have examined the correlation between perceived maternal/paternal acceptance (PMA/PPA) and CP, and the mediating and moderating mechanisms underlying this relation are also largely unknown. Thus, by using a cross-sectional designed questionnaire survey of 4,206 adolescents (M = 16.41 years, SD = 0.77), the current study examined the relationship between PMA/PPA and CP, as well as the mediating effect of materialism and the moderating effects of father/mother-child attachment anxiety and attachment avoidance in this relation. The results showed that PMA/PPA was protective factors of CP. The moderated mediation models showed that materialism played a partial mediation role in the relationship between PMA/PPA and CP. Moreover, the direct association of PMA/PPA with CP was exacerbated by stronger father/mother-child attachment anxiety, in contrast, it was weakened by stronger father/mother-child attachment avoidance. Besides, both father/mother-child attachment anxiety and father/mother-child attachment avoidance strengthened the direct relationship between materialism and CP, and further strengthened the indirect association of PMA/PPA with CP. This study highlighted the importance of uncovering the link between perceived parental acceptance and adolescents' CP and emphasized the underlying mechanisms, which are of great significance for the prevention and intervention of adolescents' CP.

"If You Love Me, You Must Do..." Parental Psychological Control and Cyberbullying Perpetration Among Chinese Adolescents.

Considering the prevalence of cyberbullying, the current study explores the factors associated with its perpetration. Using self-determination theory, the association of parental psychological control (PPC) with cyberbullying perpetration was examined. To explore this influencing mechanism further, psychological reactance (PRt) and materialism were examined as two mediators in this relationship. Moreover, according to the diathesis-stress model and cognitive model of resilience, psychological resilience (PRl) was examined as a moderator in the direct and indirect link between PPC and cyberbullying perpetration. To test our expectations, 804 adolescents (M = 13.12, SD = 1.16) participated in the current study using a cross-sectional design and multiple questionnaires, namely, the Chinese version of the Parental Control Questionnaire, Revised Cyber Bullying Inventory, Hong Psychological Reactance Scale, Material Values Scale for Children, and Resilience Scale for Chinese Adolescents. Correlation analysis indicated that PPC, PRt, materialism, and cyberbullying perpetration were significantly and positively correlated, and were significantly and negatively related to PRl. Moderated mediation analysis revealed that PRt and materialism played multiple mediating roles in the relationship between PPC and cyberbullying perpetration. Multiple mediation analysis indicated that PRl weakened the direct associations of PPC, PRt, and materialism with cyberbullying perpetration, further alleviating the indirect and direct associations of PPC with cyberbullying perpetration, supporting the moderated mediation model. Specifically, adolescents high in PPC were more likely to have stronger PRt and materialistic values, which further triggered cyberbullying perpetration. PRl can protect adolescents high in PPC from cyberbullying perpetration via weakening the direct and indirect associations of PPC with cyberbullying.

Relationship between Honesty-Humility and Cyberbullying Perpetration: A Moderated Mediation Model.

Previous studies have verified the roles of big five personalities in cyberbullying perpetration (CP). The Big Five model has been revised to include an additional dimension, called Honesty-Humility (HH). It is not clear whether HH would be associated with CP. Thus, the effect of HH on CP was examined. To further explore this influencing mechanism, materialism was examined as a mediator, and parental psychological control (PPC) was examined as a moderator in the relationship between HH and CP. A total of 1,004 Chinese adolescents (M = 12.95, SD =1.12) participated in this study using a cross-sectional design and multiple questionnaires, namely, the Honesty-Humility subscale of the 24-item Brief HEXACO Inventory, the Revised Cyber Bullying Inventory, the Material Values Scale for Children, and the Parental Control Questionnaire. Correlation analyses indicated that CP, materialism, and PPC were significantly and positively correlated with each other, and were significantly and negatively associated with HH. The mediation model revealed that materialism played a mediating role in the relationship between HH and CP. The moderated mediation model revealed that stronger PPC strengthened the direct associations of HH with materialism and CP, and further strengthened the indirect relationship between HH and CP. Specifically, Chinese adolescents with lower levels of HH were more likely to build material values and further engaged in cyberbullying perpetration, when they perceived stronger PPC.

Sex differences of parental phubbing on online hostility among adolescents: A moderated mediation model.

To explore the relationship between parental phubbing (PP) and adolescent online hostility and its' psychological mechanism, 689 Chinese adolescents were recruited to complete a paper-and-pencil questionnaire. We took cyber flaming (CF) as an overall category for hostile online communication to investigate the relationship between PP and CF and the mediating role of perspective-taking (PT) in this relationship and examined whether there is a sex difference in this process. After controlling the average daily online time, the results showed that PP predicted adolescent CF positively. The relationship between PP and CF was partially mediated by PT. The effect of PP on PT was moderated by sex, with the result being significant only for boys. Related findings and future directions were discussed.

Gender Differences between Cyberbullying Victimization and Meaning in Life: Roles of Fatalism and Self-Concept Clarity.

Despite widely linking cyberbullying victimization (CV) to some poorer mental health outcomes, CV also negatively impacts the internal strengths that make life worth living, such as meaning in life, which has received less attention. This study thus aimed to examine the relationship between CV and presence of meaning in life as well as the mediating roles of fatalism and self-concept clarity in this relationship. Gender differences in the mediation model were also examined. A sample of 766 Chinese junior school students (M = 13.11 years, SD = 1.19 years) completed questionnaires regarding CV, presence of meaning, self-concept clarity, and fatalism. The results revealed that CV was significantly and positively correlated with presence of meaning. Structural equation modeling indicated that self-concept clarity and fatalism completely mediated the link between CV and presence of meaning in parallel and sequential manners. The multigroup analysis further showed that CV was positively related to fatalism only among girls and had a stronger negative association with self-concept clarity for girls compared with boys. Thus, the indirect link between CV and presence of meaning was stronger for girls (versus boys). Findings suggested that CV was associated with poor self-concept clarity, stronger fatalism, and low levels of presence of meaning in life among adolescents, especially for girls. Increasing self-concept clarity and decreasing fatalistic beliefs are thus necessary to help cyberbullying victims to develop meaning in life.

Social Comparison Orientation and Cyberbullying Perpetration and Victimization: Roles of Envy on Social Networking Sites and Body Satisfaction.

Although some studies have explored the psychological and behavioral outcomes of social comparison orientation (SCO), few have explored the associations of SCO with cyberbullying perpetration and victimization. The current study aimed to investigate the associations of SCO with cyberbullying perpetration and victimization, and considered envy on social networking sites (SNS) as a mediator and body satisfaction as a moderator in these relations. To test our expectations, 941 adolescents aged between 10 and 16 years (M = 13.15, SD = 1.18) completed multiple questionnaires, namely the Social Comparison Orientation Scale, the Revised Cyber Bullying Inventory, an envy scale revised for the SNS context, and the Body Areas Satisfaction Scale. Correlation analysis revealed that cyberbullying perpetration and cyberbullying victimization were significantly and positively correlated with SCO and envy on SNS, and significantly and negatively correlated with body satisfaction. The results of structural equation modeling (SEM) revealed that envy on SNS played a mediating role in the associations of SCO with cyberbullying perpetration and victimization. The results of SEM and simple slope test analysis indicated that body satisfaction weakened the direct association of SCO with envy on SNS and further weakened the indirect associations of SCO with cyberbullying perpetration and victimization via envy on SNS. Specifically, individuals with high levels of SCO were more likely to feel envious on SNS, and further tended to bully others and be bullied online when they were dissatisfied with their bodies. In other words, positive body satisfaction protected individuals with high levels of SCO from cyberbullying perpetration and victimization by decreasing their feelings of envy on SNS.

Gender differences in the relationships between parental phubbing and adolescents' depressive symptoms: The mediating role of parent-adolescent communication.

Phubbing, as a common phenomenon in modern society's communication, describes the act of using one's phone in face-to-face interactions. In recent years, parental phubbing has attracted the attention of researchers, and it is imperative to explore the relationship between father phubbing (Fphubbing), mother phubbing (Mphubbing) and adolescent development. Therefore, this study investigated 4213 adolescents (mean age = 16.41, SD = 0.77, 52.5% were boys) and explored the relationship between Fphubbing and Mphubbing and adolescents' depressive symptoms. Our single-group path analysis showed that both Fphubbing and Mphubbing were positively associated with adolescents' depressive symptoms. These positive associations were mediated by father-adolescent communication and mother-adolescent communication. Furthermore, multiple-group path analysis revealed that, compared to male adolescents, the relationship between Fphubbing and father-adolescent communication, and the relationship between Mphubbing and mother-adolescent communication were stronger in female adolescents. These findings offer a more ecological and comprehensive understanding of how parental phubbing associates with parent-adolescent communication and adolescents' depressive symptoms.

Relationship between stressful life events and cyberbullying perpetration: Roles of fatalism and self-compassion.

Few studies have documented the relationship between stressful life events and cyberbullying perpetration, and the mechanisms connecting this link are unknown. Thus, the current study tested the association of stressful life events with cyberbullying perpetration and explored this influencing mechanism further with fatalism and self-compassion tested as a mediator and a moderator respectively. A sample of 1104 Chinese adolescents (50.72% males; mean age = 13.11) volunteered for this study. The results revealed that exposure to stressful life events was positively related to cyberbullying perpetration, and fatalism played a mediation role in this relationship. The moderated mediation model revealed that stronger self-compassion weakened and even interrupted the direct associations of stressful life events with fatalism and cyberbullying perpetration, and further weakened and even interrupted the indirect relationship between stressful life events and cyberbullying perpetration via fatalism. That is, adolescents low in self-compassion were more likely to build fatalistic beliefs and engage in cyberbullying perpetration when they experienced high levels of stressful life events; whereas, stressful life events were not related to increased risk of cyberbullying perpetration among adolescents high in self-compassion.

The influence of perceived parental phubbing on adolescents' problematic smartphone use: A two-wave multiple mediation model.

Using a two-wave longitudinal design, the current study examined the relationship between early perceived parental phubbing and subsequent problematic smartphone use. As loneliness is a sensitive indicator of interpersonal problems and fear of missing out is a strong predictor of Internet-related addiction, we examined these two variables as possible mediators in this relationship based on existing literature. A total of 1447 Chinese adolescents (572 males and 875 females, mean age = 16.15 years) completed questionnaires regarding perceived parental phubbing, loneliness, fear of missing out, and problematic smartphone use. The results indicated that: (a) early fathers' phubbing (fphubbing) and mothers' phubbing (mphubbing) predicted adolescents' subsequent problematic smartphone use; (b) loneliness mediated the relationship between early fphubbing/mphubbing and adolescents' subsequent problematic smartphone use; and (c) loneliness and fear of missing out sequentially mediated the relationship between early fphubbing/mphubbing and adolescents' subsequent problematic smartphone use. These results suggested that three types of interventions could be effectively used to decrease the risk of problematic smartphone use among adolescents, namely, reducing perceived parental phubbing, relieving loneliness, and decreasing fear of missing out.

EpoR-tdTomato-Cre mice enable identification of EpoR expression in subsets of tissue macrophages and hematopoietic cells.

The erythropoietin receptor (EpoR) has traditionally been thought of as an erythroid-specific gene. Notably, accumulating evidence suggests that EpoR is expressed well beyond erythroid cells. However, the expression of EpoR in non-erythroid cells has been controversial. In this study, we generated EpoR-tdTomato-Cre mice and used them to examine the expression of EpoR in tissue macrophages and hematopoietic cells. We show that in marked contrast to the previously available EpoR-eGFPcre mice, in which a very weak eGFP signal was detected in erythroid cells, tdTomato was readily detectable in both fetal liver (FL) and bone marrow (BM) erythroid cells at all developmental stages and exhibited dynamic changes during erythropoiesis. Consistent with our recent finding that erythroblastic island (EBI) macrophages are characterized by the expression of EpoR, tdTomato was readily detected in both FL and BM EBI macrophages. Moreover, tdTomato was also detected in subsets of hematopoietic stem cells, progenitors, megakaryocytes, and B cells in BM as well as in spleen red pulp macrophages and liver Kupffer cells. The expression of EpoR was further shown by the EpoR-tdTomato-Cre-mediated excision of the floxed STOP sequence. Importantly, EPO injection selectively promoted proliferation of the EpoR-expressing cells and induced erythroid lineage bias during hematopoiesis. Our findings imply broad roles for EPO/EpoR in hematopoiesis that warrant further investigation. The EpoR-tdTomato-Cre mouse line provides a powerful tool to facilitate future studies on EpoR expression and regulation in various non-hematopoietic cells and to conditionally manipulate gene expression in EpoR-expressing cells for functional studies.

Shyness and depressive symptoms: a multiple mediation model involving core self-evaluations and sense of security.

BACKGROUND: Depression is one of the most common mental health disorders among Chinese university students. Some depressed students are observed to be shy. Therefore, the current study aimed to verify the association of shyness and depression symptoms and explore how shyness is positively associated with depressive symptoms. According to Blatt's model of depression, the current study explores the mediating roles of core self-evaluation and sense of security, as an affective factor and a cognitive factor, in the relationship between shyness and depressive symptoms. METHODS: The participants (543 Chinese college students) completed the Revised Henderson Undergraduate Shyness Scale, Core Self-Evaluations Scale, Self-Rating Depression Scale, and Security Questionnaire. The bivariate correlations between variables andthe multiple mediation model were tested by correlation analysis and structural equation model respectively. RESULTS: Shyness was significantly and positively correlated with depressive symptoms; shyness and depressive symptoms were significantly and negatively correlated with sense of security and core self-evaluations; and sense of security was significantly and positively correlated with core self-evaluations. Core self-evaluations and sense of security played complete mediating effects in the relationship between shyness and depressive symptoms parallelly and sequentially. LIMITATIONS: The cross-sectional design we used limited causal interpretations. Besides, the sample was restricted to college students, and the generalizability of the results is thus limited. CONCLUSIONS: Shyness increases the risk ofdepression by reducing the sense of security and core self-evaluation, as well as by the sequential mediating effects of sense of security and core self-evaluations.