Parent-Child Attachment Moderates the Associations Between Cyberbullying Victimization and Adolescents' Health/Mental Health Problems: An Exploration of Cyberbullying Victimization Among Chinese Adolescents

Cybervictimization and Non-Suicidal Self-Injury Among Chinese College Students: an Exploration Through the Lens of Experiential Avoidance Model

Purpose

Non-suicidal self-injury (NSSI) is a growing public health concern among college students, with cybervictimization (CV) emerging as a significant contributing factor. Grounded in the experiential avoidance theory, this study investigates the mediating roles of cognitive fusion and negative emotions in the relationship between CV and NSSI, providing new insights into these key variables.

Methods

A convenience sample of 457 undergraduate students (29% male; mean age 18.36±0.66 years) from two universities in Fujian Province participated in this study. Data were collected using the Cyberbullying Victimization Scale, Cognitive Fusion Questionnaire, Positive and Negative Affect Schedule, and Non-Suicidal Self-Injury Scale. Descriptive statistics and Pearson correlation analysis were conducted using SPSS 25.0, while the mediating effects were analyzed using Process 3.5.

Results

(1) Significant positive correlations were found among CV, cognitive fusion, negative emotions, and NSSI (p < 0.01). (2) CV was directly associated with NSSI (β = 0.22, p < 0.001) and positively predicted both cognitive fusion (β = 0.17, p < 0.001) and negative emotions (β = 0.15, p < 0.01). Additionally, cognitive fusion (β = 0.16, p < 0.01) and negative emotions (β = 0.11, p < 0.05) significantly predicted NSSI. (3) Mediation analyses revealed that cognitive fusion and negative emotions mediated the CV-NSSI relationship through three pathways: CV→cognitive fusion→NSSI (mediation effect = 0.026), CV→negative emotions→NSSI (mediation effect = 0.02), and CV→cognitive fusion→negative emotions→NSSI (mediation effect = 0.01).

Conclusion

The study confirms that CV influences NSSI indirectly through cognitive fusion and negative emotions, supporting the experiential avoidance model. These findings underscore the importance of addressing cognitive and emotional processes in interventions aimed at reducing NSSI among college students.

The prevalence of gambling and problematic gambling: a systematic review and meta-analysis

BACKGROUND

Gambling behaviours have become of increased public health interest, but data on prevalence remain scarce. In this study, we aimed to estimate for adults and adolescents the prevalence of any gambling activity, the prevalence of engaging in specific gambling activities, the prevalence of any risk gambling and problematic gambling, and the prevalence of any risk and problematic gambling by gambling activity.

METHODS

We performed a systematic review and meta-analysis. We systematically searched for peer-reviewed literature (on MEDLINE, Embase, and PsycInfo) and grey literature to identify papers published between Jan 1, 2010, and March 4, 2024. We searched for any gambling, including engagement with individual gambling activities, and problematic gambling data among adults and adolescents. We included papers that reported the prevalence or proportion of a gambling outcome of interest. We excluded papers of non-original data or based on a biased sample. Data were extracted into a bespoke Microsoft Access database, with the Joanna Briggs Institute Critical Appraisal Tool used to identify the risk of bias for each sample. Representative population survey estimates were firstly meta-analysed into country-level prevalence estimates, using metaprop, of any gambling, any risk gambling, problematic gambling, and by gambling activity. Secondly, population-weighted regional-level and global estimates were generated for any gambling, any risk gambling, problematic gambling, and specific gambling activity. This review is registered on PROSPERO (CRD42021251835).

FINDINGS

We screened 3692 reports, with 380 representative unique samples, in 68 countries and territories. Overall, the included samples consisted of slightly more men or male individuals, with a mean age of 29·72 years, and most samples identified were from high-income countries. Of these samples, 366 were included in the meta-analysis. Globally, 46·2% (95% CI 41·7-50·8) of adults and 17·9% (14·8-21·2) of adolescents had gambled in the past 12 months. Rates of gambling were higher among men (49·1%; 45·5-52·6) than women (37·4%; 32·0-42·5). Among adults, 8·7% (6·6-11·3) were classified as engaging in any risk gambling, and 1·41% (1·06-1·84) were engaging in problematic gambling. Among adults, rates of problematic gambling were greatest among online casino or slots gambling (15·8%; 10·7-21·6). There were few data reported on any risk and problematic gambling among adolescent samples.

INTERPRETATION

Existing evidence suggests that gambling is prevalent globally, that a substantial proportion of the population engage in problematic gambling, and that rates of problematic gambling are greatest among those gambling on online formats. Given the growth of the online gambling industry and the association between gambling and a range of public health harms, governments need to give greater attention to the strict regulation and monitoring of gambling globally.

FUNDING

Australian National Health and Medical Research Council.

The relationship between attachment and posttraumatic stress in children and adolescents: A meta-analytic review

The relationship between attachment and posttraumatic stress symptoms (PTSS) has been researched extensively within adult samples, with findings consistently demonstrating a relationship between insecure attachment and increased PTSS, and between secure attachment and decreased PTSS. To a lesser extent, such relationships have also been explored within child and adolescent samples. The evidence to date is equivocal and there have been no attempts to synthesize studies. This meta-analysis aimed to provide a quantitative synthesis of studies reporting a relationship between attachment orientation (on both developmental and social psychological measures) and PTSS within children and adolescents. A random effects model was used to pool 30 studies (N = 10,431) reporting exposure to a range of traumatic events including maltreatment and war trauma. Results demonstrate a negative correlation between secure attachment and PTSS (r = -.16) and a positive correlation between insecure attachment (r = .20), avoidant attachment (r = .20), anxious attachment (r = .32), and disorganized attachment (r = .17) and PTSS. These findings indicate a small but significant relationship between attachment and PTSS in children and adolescents. Exposure to maltreatment did not moderate the relationship between secure attachment and PTSS, though strengthened the relationship between insecure attachment and PTSS.

Family Emotional Expressiveness and Adolescents' Cyberbullying Bystanders: The Mediating Role of Empathy

Background

The significant influence of family emotional expressiveness (FEE) on adolescents' face-to-face social interactions is well-established. However, there has been limited investigation into potential links between FEE and adolescents' online social behaviors, especially cyberbullying bystander behaviors, which are pivotal in cyberbullying incidents. This study aimed to assess the relative importance of different aspects of FEE (positive FEE vs. negative FEE vs. the Positive-to-Negative ratio) in predicting adolescents' cyberbullying bystander behaviors, and the mediating roles of affective and cognitive empathy in these relationships.

Methods

A sample of 1,952 adolescents (Mage = 14.18, SD = 1.33) completed questionnaires, including the Family Emotional Expressiveness Questionnaire, Basic Empathy Scale, and Cyberbullying Bystander Behavior Scale. SPSS 26.0 and Mplus 8.3 were used for analysis.

Results

(1) Positive FEE exhibited a positive association with protective behavior and a negative association with indifferent behavior. Conversely, negative FEE showed positive associations with reinforcing and indifferent behaviors. However, the Positive-to-Negative ratio did not exhibit significant associations with any of the three bystander behaviors. (2) Negative FEE emerged as relatively more significant than both positive FEE and the Positive-to-Negative ratio in predicting reinforcing and indifferent behaviors. (3) Affective empathy mediated the relationship between positive FEE and reinforcing behavior, while cognitive empathy mediated the relationship between positive FEE and protective and indifferent behaviors. Moreover, cognitive empathy exerted a more influential role than affective empathy in this mediation process.

Conclusion

Various aspects of FEE demonstrated distinct relationships with three cyberbullying bystander behaviors, with affective and cognitive empathy playing an important mediating role in the association. This finding holds substantial implications for the development of cyberbullying prevention strategies. Such strategies could target the reduction of negative emotional expression within adolescent families and the cultivation of both cognitive and affective empathy.

Tobacco use, trauma exposure and PTSD: a systematic review

Tobacco use remains one of the most significant preventable public health problems globally and is increasingly concentrated among vulnerable groups, including those with trauma exposure or diagnosed with PTSD. The goal of this systematic review was to update and extend previous reviews. Of the 7224 publications that met the initial criteria, 267 were included in the review. Summary topic areas include conceptual frameworks for the relation between trauma or PTSD and tobacco use; associations between trauma exposure or PTSD and tobacco use; number and type of trauma exposures and tobacco use; PTSD symptoms and tobacco use; Treatment-related studies; and the examination of causal relations. Evidence continues to indicate that individuals exposed to trauma or diagnosed with PTSD are more likely to use tobacco products, more nicotine dependent and less likely to abstain from tobacco even when provided evidence-based treatments than individuals without trauma. The most commonly cited causal association proposed was use of tobacco for self-regulation of negative affect associated with trauma. A small proportion of the studies addressed causality and mechanisms of action. Future work should incorporate methodological approaches and measures from which we can draw causal conclusions and mechanisms to support the development of viable therapeutic targets.

Adolescent smoking patterns: Associations with sociodemographic factors, cyberbullying, and psychiatric diagnoses in an outpatient clinical sample

There is a scarcity of research on smoking in adolescents within a clinical (outpatient) sample, and there is no existing knowledge on the relationship between cyberbullying and smoking in this population. The primary aim of this study is to determine the prevalence of smoking among adolescents in a clinical sample. Additionally, it aims to examine the potential associations between smoking status and factors such as socioeconomic characteristics, psychiatric diagnoses, and cyberbullying levels. A cross-sectional study was performed on 200 adolescents who visited a tertiary child and adolescent psychiatry outpatient clinic. Participants were assessed using the DSM-5 based psychiatric evaluation, the Schedule for Affective Disorders and Schizophrenia for School-Age Children-Present and Lifetime Version-DSM-5 Turkish Adaptation (K-SADS-PL-DSM-5-T), the Revised Cyber Bullying Inventory-II, and the Fagerström Test for Nicotine Dependence. The study found that 21% of the sample consisted of regular smokers, with a higher prevalence observed among older adolescents. The prevalence of depression and disruptive behavior disorders was significantly greater in the smoking group compared to other groups (p:0.043, p < 0.001, respectively). There was a significant difference in the scores for the cyberbullying bully subdimension among smokers (p = 0.013). The results of the multinomial logistic regression analysis indicated significant associations between smoking and age, maternal smoking status, friends smoking status, and a diagnosis of disruptive behavior disorder (p < 0.05 for all variables). This study reveals a significant prevalence of adolescent smoking in an outpatient clinic. These findings highlight the necessity of implementing focused smoking cessation interventions for this specific population.

Moderating role of mental health literacy on the relationship between bullying victimization during the life course and symptoms of anxiety and depression in Chinese college students

BACKGROUND

Exposure to persistent bullying victimization across multiple periods results in a high risk of worse consequences. Although amples studies support the association between bullying victimization and symptoms of anxiety and depression, whether mental health literacy can serve as a moderator on this relationship remains unknown. Therefore, the aim of this study was to examine the patterns of bullying victimization across the life course, and disentangle the moderating effect of mental health literacy between bullying victimization patterns and symptoms of anxiety and depression in Chinese college students.

METHODS

A total of 4036 college students were enrolled by cluster sampling from November 2020 to January 2021. Bullying victimization, mental health literacy, and symptoms of anxiety and depression were measured by self-report validated questionnaires. A latent class analysis was applied to identify bullying patterns. The PROCESS program was conducted to analyze whether mental health literacy moderates the link between bullying victimization patterns and symptoms of anxiety and depression.

RESULTS

Three latent patterns of bullying victimization were identified as follows: persistent bullying pattern (6.2%), moderate bullying pattern (10.5%), and low bullying pattern (83.3%). Logisitic regression analysis of anxiety and depressive symptoms indicated that compared with low bullying pattern, persistent bullying pattern had the highest risk. Specifically, mental health literacy moderated the association between bullying victimization pattern and anxiety symptoms (B = -0.039, P < 0.05).

CONCLUSIONS

It is important for practitioners to examine bullying victimization across the life course concurrently rather than a single period in isolation. Interventions and research should enhance mental health literacy to improve the mental health in college students with a history of bullying victimization.

The relationship between parent-child relationship and peer victimization: a multiple mediation model through peer relationship and depression

Introduction

Peer victimization is a highly prevalent worldwide issue with cross-cultural characteristics. Parent-child relationship and peer victimization is known to be interrelated, but how they influence each other remains unclear. This study explored the mechanisms of peer victimization related to parent-child relationship.

Methods

A total of 58,756 fourth grade students aged 10-12 years (10.83 ± 0.83, 54.4% males) from China completed four questionnaires. A multiple mediator model was tested, in which the two variables influenced each other through the mediating factors of peer relationship and depression.

Results

Peer victimization was indirectly negatively impacted by parent-child relationship through two chain mediating factors of peer relationship and depression: (1) the mediational path through peer relationship with an effect size of 44.66%; (2) the mediational path through depression with an effect size of 21.64%; and (3) the mediational path through peer relationship and depression with an effect size of 18.08%. The total mediational effect size was 84.11%.

Conclusion

The effect size through peer relationship is the strongest among the three mediation paths, suggesting that peer relationship is the key determinant in breaking the link between parent-child relationship and victimization. Poor parent-child and peer relationships may be risk factors eliciting peer victimization. Compared to internalizing behaviors (e.g., depression), low-quality interpersonal relationships maybe the root cause of the formation and maintenance of victimization. Thus, intervention programs against bullying should pay more attention on children's contextual factors, especially their relationships with their families and peers, among children at an early age.

Prevalence and associated factors of bullying victimization among Chinese high school students in Shandong, China

BACKGROUND

Bullying is a growing concern worldwide. However, there is insufficient research on the prevalence and factors associated with different forms of bullying in a large sample of Chinese adolescents. This study aims to investigate the prevalence and associated factors of bullying victimization among Chinese high school students.

METHODS

Data from the 2020-2021 cross-sectional survey of the DYH program were used. A total of 8203 high school students were randomly selected from all 17 cities in Shandong Province, China. Bullying victimization was measured using two separate questions and identified into three types: school bullying victims, cyberbullying victims, and combined bullying victims. The multinomial logit model was used to explore the factors related to bullying victimization.

RESULTS

The prevalence of bullying victimization was 11.59 %, with 4.04 % of school bullying, 3.37 % of cyberbullying, and 4.18 % of combined bullying. Smoking was negatively associated with bullying victimizations. Male, physical exercise, peer relationships, and obsessive-compulsive symptoms were significantly associated with school bullying victims and combined victims. Watching TV was an influencing factor for school bullying victims and cyberbullying victims. Single-child households, family economic status, drinking alcohol, parent-child relationships, and paranoia were correlated with different types of bullying victimization.

LIMITATIONS

The cross-sectional design limited the examination of causal inferences.

CONCLUSION

We should pay more attention to cyberbullying victimization, which has become as common as school bullying victimization among high school students. The associated factors explored in this study may contribute to understanding bullying victimizations and designing bullying intervention strategies among high school students in China.

The Interactive Effects of Parental Mediation Strategies in Preventing Cyberbullying on Social Media

Purpose

Applying the parental mediation theory, this study investigates the main effects and interactive effects of three parental social media strategies, ie, active mediation, restrictive mediation, and non-intrusive inspection, on cyberbullying among teenagers. A matched child-parent survey was conducted with 642 secondary-school students aged 13-18 and their parents in China.

Results

The results showed that active mediation was negatively associated with both cyberbullying victimization and perpetration. Restrictive mediation was not significantly associated with cyberbullying. Non-intrusive inspection was positively associated with cyberbullying perpetration but not associated with cyberbullying victimization. Moreover, the two-way interaction between active and restrictive mediation as well as the three-way interaction between the three parental mediation strategies significantly affected cyberbullying perpetration and victimization. Specifically, the combination of high-level active mediation and non-intrusive inspection with low-level restrictive mediation was the most effective strategy for preventing cyberbullying.

Conclusion

This finding significantly contributes to the parental mediation literature and provide theoretical guidelines for parental intervention to prevent cyberbullying among teenager.

Parental attachment and cyberbullying among college students: the mediating role of loneliness and the moderating role of interdependent self

Although considerable research has shown that attachment is a protective factor for cyberbullying, little research has investigated the mechanisms underlying this relationship among college students. This study examined whether loneliness mediates the association between parental attachment and cyberbullying and whether this process is moderated by interdependent self. A sample of 1125 college students (Mage = 19.14, SDage = 1.52 years) in China completed a questionnaire measuring parental attachment, cyberbullying, loneliness, and interdependent self. Loneliness partially mediated the relationship between parental attachment and cyberbullying. Moreover, the mediation effect of loneliness was moderated by interdependent self. A moderated mediation analysis further revealed that interdependent-self moderated the predictive effect of loneliness on cyberbullying. Specifically, the predictive effect of loneliness on cyberbullying was only significant among college students with low interdependent self. The study highlights the complex nature of the association between parental attachment and cyberbullying. These findings provide new perspectives for intervention and prevention of cyberbullying among college students.

Does Religion Buffer Against the Detrimental Effect of Cyberbullying Victimization on Adults' Health and Well-Being? Evidence from the 2014 Canadian General Social Survey

While prior research has well-documented the detrimental effect of cyberbullying victimization on health and well-being among children and adolescents, less is known about whether the same adverse pattern can be observed among adults. Moreover, it is unclear about what psychosocial resources might moderate this association. The present study uses a nationally representative cross-sectional survey-2014 Canadian General Social Survey (N = 17,548)-to examine three research questions. First, is cyberbullying victimization associated with adults' self-rated health, mental health, and life satisfaction? Second, how does religiosity-religious service attendance and religious beliefs-moderate this association? Third, do any observed patterns further differ for men and women? Through a series of logistic and ordinary least squares regression models, the results show that adults who experienced cyberbullying victimization in the past 5 years are more likely to report poor self-rated health and mental health compared to those who did not experience cyberbullying victimization in the past 5 years. Likewise, cyberbullying victimization is also associated with lower levels of life satisfaction. In addition, the adverse associations of cyberbullying victimization in the past 5 years with self-rated health and life satisfaction are weaker among those who attended religious service at least once a week in the past twelve months. A similar pattern is observed for the buffering effect of viewing religious beliefs as very important in the adverse association of cyberbullying victimization in the past 5 years with self-rated life satisfaction. There is also evidence suggesting the gendered buffering effect of the importance of religious beliefs in the association between cyberbullying victimization and self-rated health. This study makes important empirical and theoretical contributions to the growing field of research on the association between cyberbullying victimization and health and well-being and to our understanding of how religion matters to individuals dealing with stressful experiences.

Adaptation and validation of the European cyberbullying intervention project questionnaire with and for Chinese adolescents

Cyberbullying is a global and growing phenomenon, which affects the wellbeing of millions of adolescents around the world including Chinese adolescents. However, there is a lack of valid and reliable measures of cyberbullying behaviours in Chinese. To address this research gap, this study aims to adapt and validate a well-known, reliable and validated instrument: the European Cyberbullying Intervention Project Questionnaire (ECIPQ) among Chinese adolescents. A 14-item (seven for cyber aggression and seven for cyber victimisation) of the Chinese version of ECIPQ was developed based on its relevance and appropriateness to the Chinese culture. After its cultural and linguistic adaptation, the measure was norm with a sample of Chinese adolescents. A total sample of 452 adolescents was randomly split into two evenly subsamples for exploratory factor analysis (EFA) and confirmatory factor analysis (CFA). The EFA results indicated that the Chinese version of ECIPQ had a good convergent validity and satisfactory discriminant validity, and a two-factor model was identified. CFA results showed a good fit of the measurement model in assessing cyber aggression and cyber victimisation. This adapted Chinese version of ECIPQ can be used to facilitate future research on cyberbullying screening, and that research may in turn promote proactive screening and better coordination of community responses for victims as well as perpetrators. Future comparative studies may use the validated scale to assess the prevalence of cyberbullying and the results of interventions to reduce cyberbullying among Chinese adolescents.

Difficulties in Emotion Regulation and Cyberbullying Among Chinese Adolescents: A Mediation Model of Loneliness and Depression

Recent research has ascertained some risk factors for cyberbullying. However, few studies have investigated the potential influence of difficulties in emotion regulation (DER) on cyberbullying, and there is little knowledge about the mediating mechanisms underlying this association. This study investigated whether DER would be significantly related to adolescent cyberbullying and whether loneliness and depression would sequentially mediate the link between DER and adolescent cyberbullying. A sample of 719 Chinese middle school students completed measures regarding demographics, DER, loneliness, depression, and cyberbullying. After controlling for the demographic covariates, the results showed that (a) DER was positively associated with adolescent cyberbullying; (b) loneliness and depression sequentially mediated the relation between DER and adolescent cyberbullying. This study emphasizes the underlying mediating mechanisms between DER and adolescent cyberbullying, which is of great significance for the prevention and intervention of adolescent cyberbullying in the digital age.

Attachment security predicts adolescents' prosocial and health protective responses to the COVID-19 pandemic

Prosocial and health protective behaviors are critical to contain the COVID-19 pandemic, yet adolescents have been difficult to engage. Attachment security promotes adolescents' capacities to navigate stress, and influences prosocial and health behaviors. Drawing on a diverse sample of 202 adolescents (48% female; 47.5% Latinx) this study evaluated relations among attachment, mental health, and prosocial and health protective responses to the COVID-19 pandemic. Attachment security (age 12) predicted adolescents' (age 15) COVID-19 prosocial (f2  = .201) and health protective behaviors (f2  = .274) during the pandemic via smaller-than-expected increases in mental health symptoms above pre-pandemic levels (age 14). Findings highlight the importance of attachment for supporting adolescents' mental health responses to life stressors and promoting prosocial and health protective behaviors.

A Meta-Analysis on Effects of Parenting Programs on Bullying Prevention

Bullying is a serious public health concern across the globe. While there are a number of bullying interventions with parental components, limited efforts have been made to synthesize the impacts of parenting programs on bullying prevention. This meta-analysis aimed to review and examine parenting programs on bullying reduction that involving both school-based and home visiting anti-bullying programs. The overall effect size supported a significant outcome on bullying reduction (d = .640, 95% confidence interval [CI] [0.239, 1.041]). Results of this meta-analysis reported that participants in the parenting programs scored significantly lower on both bullying and victimization. Data from the randomized controlled trials and the pre- and posttest design studies showed evidence of highly significant effects of parenting interventions on bullying reduction. Child- and parent-related factors including parenting style, children's empathy, and parent-child interaction about bullying were found to be significantly related to the effectiveness of intervention programs. This study provides evidence to enhance policy and practice for effectively enabling parent involvement in bullying behavior reduction and to increase parent-children communication about bullying as well as parenting skills. Future researchers and practitioners may explore more about the impact of school-family partnerships and their reliance on each other to help reduce bullying.

Cyberbullying Involvement, Resilient Coping, and Loneliness of Adolescents During Covid-19 in Rural China

Cyberbullying involvement can lead to internal health issues, especially mental health problems. Different coping strategies may reduce or enhance the strengths between cyberbullying experience and mental health problems. In this study, we examined the correlations between cyberbullying involvement and loneliness among a group of children and adolescents during the Covid-19 pandemic in China, focusing on investigating the protecting effect of the resilient coping strategy. The results demonstrated that 86.68% of the students were not involved in cyberbullying activities, 8.19% were victims only, 1.89% was perpetrators only, and 3.24% were both victims and perpetrators. Compared with the non-involved, the victims-only group had a significantly higher degree of reported loneliness and a lower score of resilient coping, while the differences of the other groups were not significant. Resilient coping strategy can significantly reduce loneliness and play a mediating role between cyberbullying victimization and loneliness, but such mitigating effect was relatively weak. Besides, peer relations were the primary protective factors, and age was the primary risk factor of loneliness among the controlled variables. This study can enrich current knowledge of cyberbullying involvement and the psychological health among children and adolescents, especially in the context of the pandemic.

How Do Cyber Victimization and Low Core Self-Evaluations Interrelate in Predicting Adolescent Problematic Technology Use?

Research has demonstrated that cyber victimization is consistently associated with higher problem behaviors such as problematic technology use. However, little research has examined specific individual dispositions that can serve as a buffer in the link between cyber victimization and higher problematic uses of technology (i.e., problematic Internet, smartphone, and social media), such as core self-evaluations (CSE). A convenience sample of 1211 high school students, 657 females, 554 males, aged 12 to 18 (mean age = 13.74) completed measures of cyber victimization, CSE, and different problematic technology-related behaviors. Results of correlational analysis revealed significant associations between cyber victimization and all problematic uses of technology. Our findings also suggested that high CSE weakened the relationship between cyber victimization and two of the three problematic uses of technology. Consistent with social compensation theory, cyber victimization was concurrently linked to different problematic uses of technology. Low CSE also strengthened the link between cyber victimization and problems use of smartphones and social media and also showed a marginally significant interaction with cyber victimization in predicting problematic Internet use. Implications of these preliminary findings are discussed and avenues for further research are offered.

The Development of Post-traumatic Stress Symptoms among Adolescents Who Experience Cyber and Traditional Victimization over Time

Adolescents' experiences of bullying victimization are positively associated with their post-traumatic stress symptoms. The development of these symptoms alongside experiences of bullying victimization over time, however, are not well understood. The current study used a transactional theory of development to examine the bidirectional associations between adolescents' post-traumatic stress symptoms and experiences of cyber and traditional victimization across three academic years. Participants were 510 Canadian students in grade 7 or 10 (M_age = 13.7, 61.6% girls) who completed surveys annually. The findings show that adolescents' concurrent experiences of cyber and traditional victimization were uniquely associated with their post-traumatic stress symptoms. Over time, greater post-traumatic stress symptoms were associated with more experiences of cyber and traditional victimization among adolescent boys and girls. Prevention and intervention efforts must address the role of post-traumatic stress symptoms that may limit adolescents' ability to develop or maintain healthy relationships.