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The protective effect of psychological suzhi on the relationship between school climate and alcohol use among Chinese adolescents

Background: There issome research on school climate impact on adolescent alcohol use in the Western social context; however, there is no research on school climate impact on adolescent alcohol use in China. This study aimed to explore the effect of school climate on Chinese adolescents’ alcohol use, and the moderating role of psychological suzhi between them. Methods: A total of 801 adolescents (45.8% boys, 14.96±1.66 years) completed self-reports on school climate, psychological suzhi, and alcohol use. Results: Moderation analyses revealed that both school climate and psychological suzhi significantly negatively predicted adolescents’ alcohol use, and the interaction of school climate and psychological suzhi significantly positively predicted adolescents’ alcohol use. Moreover, the effect of school climate on adolescents’ alcohol use was stronger for low psychological suzhi adolescents than high psychological suzhi adolescents. Conclusions: We can build good school climate by formulating of national level legal and regulations and good social norms, and use mature interventions or cultivation strategies to improve adolescents’ psychological suzhi in order to better play its role in protection.


Introduction
Alcohol use is a high-risk behavior and is a widespread problem among adolescents, 1 specifically in America where 80% of the students have consumed alcohol by the end of high school and 51% have done so by the eighth grade. 2 Among 8,705 students aged 14-17 years from six European cities, the ageadjusted prevalence of weekly binge drinking and alcohol consumption was 4.2% and 11.3%, respectively. 3 In the selected eight Asian countries, over 15% of the total deaths among young men and 6% among young women aged [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] years are attributable to alcohol use. 4 China is a big consumer of alcoholic drinks, in view of the harm of alcohol use to national health, the government has adopted many measures in social propaganda and legal restrictions in order to reduce the consumption of alcohol, especially adolescents' alcohol use. For example, a high consumption tax is imposed on alcoholic products to raise their prices. At the same time, controlling alcohol use among adolescents is also an important part of school health work in China. Moreover, researcher used data from the national survey of adolescent health risk behaviors (369,337 secondary school students), which found that 70% of the senior high students had the history of alcohol use, and regarding gender differences, the prevalence of current drinkers was 36.4% and 23.8% and heavy binge drinkers was 3.3% and 1.2% for male and female students, respectively. 5 Alcohol use has a detrimental effect on adolescents' physical, mental, and social development. 1,6 Alcohol use could also be a predictor of academic achievement since students who use alcohol are less likely to attend class, complete their homework, achieve high marks, or value good grades. 7 High alcohol consumption is also positively associated with anxiety and depression symptoms among adolescents and adults. 8 McManama et al, 9 found that increased frequency of alcohol use was associated with increased odds of a suicide attempt, and suggested that alcohol use may hasten the transition from suicidal ideation to suicide attempt in adolescents with low levels of depressed mood. In addition, alcohol may be a "gateway" substance that leads to the use of cannabis and other illicit drugs. 10 Hingson et al, 11 found that the younger the age that people start drinking, the greater their likelihood of developing alcohol dependence within 10 years and before the age of 25 years and the stronger the subsequent association with chronic relapsing dependence, characterized by multiple episodes, past-year dependence, and, among dependent persons, episodes of longer duration and a wider range of symptoms. McGue et al, 12 also found that the age one started drinking was associated with a broad range of indicators of disinhibited behavior and psychopathology. Therefore, premature drinking can have a negative impact on an individual's future development.
In recent years, factors contributing to the development of adolescent alcohol use have been explored in order to create effective, efficient intervention strategies, and researcher found that family, school, and peers were closely associated with adolescents' alcohol use. 13,14 The effect of schooling on students has long been of interest to educational researchers and policymakers. 15 School climate refers to the quality and character of school life, which is based on patterns of people's experiences of school life and reflects norms, goals, values, interpersonal relationships, teaching and learning practices, and organizational structures. 16 In recent years, there has been a growing body of research on the impact of student perceptions of school climate on their psychological, social, and academic adjustment. 17 There are also some researches on how school climate impacts adolescent alcohol use. For example, in a longitudinal study with a sample of 2,490 German adolescents, class climate mediated a small, but significant part of the association between peer and adolescent alcohol use; 18 Data from 15 year old students in Finland and Norway found that improved perceived school environment would reduce alcohol use. 19 However, despite China's large population, there are relatively few studies on alcohol use, and due to distinct cultural factors, such as smoking and drinking tolerance, we cannot simply extend foreign research results in Chinese adolescents. 20 Therefore, we explored if the school climate affects Chinese adolescents' alcohol use.
In addition, there are two kinds of measurement of school climate: objective and subjective. Objective measurement mainly occurs through the collection of school records, whereas subjective measurement mainly involves examining school members' perceptions on all aspects of the school climate. 15,21 In contrast to the inadequacy of objective measurements, subjective measurement data can not only examine the perception of multi-party members, but also reflect the impact of school climate perception on individual's behavior. Therefore, in recent years, perception measurement has gradually become the main way for researchers to quantify school climate. 21 Therefore, we employed a subjective instrument to test the adolescents' school climate.
In recent years, research has begun to focus on factors that affect adolescents' alcohol use in individual traits. 22 Psychological suzhi, as a basic and core individual trait, participates in all aspects of psychological activities. Empirical researches have proved that psychological suzhi has an impact on the individual's internal psychological conditions and external behaviors, such as mental health, social adaptation, and academic development. 23 Thus, we adopted psychological suzhi as the study variable.
Psychological suzhi is first proposed by Chinese scholars, which refers to a mental quality characterized by being steady, essential, and implicit. It has a derivative function and is closely related to individuals' developmental, adaptive, and creative behaviors, and is also a multi-level self-organized system that involves steady implicit mental qualities and explicit adaptive behaviors. 24,25 Moreover, it has gained acceptance and recognition in Western academia. 26 Quantitative (eg, questionnaire survey and factor analysis) and qualitative (eg, interviews and grounded theory) researches have verified that psychological suzhi has three dimensions: cognitive quality (including reflectivity, creativity, practice, and meta-cognition), individuality (including motive, emotion, will-power, and self), and adaptability (including self-orientation and society orientation). Cognitive quality can be manifested through an individual's cognitive processing and its connotation can be revealed through cognitive processing. As the most basic component of psychological suzhi, cognitive quality is involved directly in individuals' cognition on objects. Individuality can be reflected through individual's actions toward objects, while it is not involved directly in individuals' cognition on objects. However, as a core part of psychological suzhi, individuality has a motivation and moderating function during cognition. Adaptability component is individual's capabilities to arrive a consistency between themselves and the environment by changing themselves or the environment during the process of socialization; it is a component which can best reflect the derivative function of psychological suzhi. Overall, the three basic dimensions of psychological suzhi are interrelated and differentiated, which constitute the core elements of psychological suzhi. 24,25 First, psychological suzhi can moderate the external environmental factors on the impact of individual positive and negative outcomes, such as depression, anxiety, and subjective well-being, typically as a protective effect. 27 Second, according to the organism-environment interaction model, 28 individuals with certain individual traits (eg, psychological suzhi) respond differently to similar environmental contexts, and not all individuals are equally influenced by the environment; dynamics of individual and context interactions contribute to the individual's psychological and social adaptation. Third, according to the risk-protective model, 29 the strength of the relationship between risk and outcome will depend on the presence of protective factors, and the presence of protective factors weakens the relationship between risk and outcome. Consequently, psychological suzhi may serve as a protective moderator of the associations between school climate and adolescent alcohol use. Specifically, it may be explained that cognitive quality is directly related to the individual's perception of school climate. Individuality can play a motivation and moderating role in the process of perception of school climate, and adaptability can achieve a positive state of adaptation by changing adolescents themselves or school climate.
In sum, adolescent alcohol use is a universal phenomenon and its underlying mechanisms are worth studying, especially in China where these relationships have not been examined. Determining whether psychological suzhi moderates the associations between school climate and adolescents' alcohol use can help educators and administrators develop more effective management practices or interventions from the perspective of psychological suzhi. Therefore, we addressed the following hypotheses: Hypothesis 1: School climate would be closely related to adolescents' alcohol use, low school climate may increase adolescents' alcohol use.
Hypothesis 2: Psychological suzhi would moderate the association between school climate and alcohol use. Specifically, the association between school climate and adolescents' alcohol use would be much weaker for adolescents with higher levels of psychological suzhi compared to those with lower levels.

Participants and procedures
Participants included 801 adolescents recruited from three secondary compulsory education schools in Southwest of China. We randomly selected 16 classes from 8th to 9th, and 11th to 12th grade at the three schools (201, 313, 287 participants, respectively); the schools could represent other parts of China, and significant differences in gender and family setting were not found among the three schools or across grades. Two-hundred 53 participants were in eighth grade, 235 were in ninth grade, 164 were in eleventh grade, and 149 were in twelfth grade. Three-hundred 67 (45.8%) were boys and 434 (54.2%) girls. Participants were aged 11-19 years (M=14.96±1.66 years).
The Research Ethics Committee of Southwest University approved this study. We first achieved the school administrators' permission to conduct the survey. Written consent was then obtained from the class teachers of school and parents at the parents' meeting. The study surveyed 801 adolescents, who gave assent whose parents gave informed consent after explanation of the purpose and procedure of the study. All participants were tested during regular school hours in their classrooms. They were first instructed about the study purpose, and then administered the three questionnaires (school climate, psychological suzhi, and alcohol use) under the researchers' supervision, then handed the completed questionnaires to researchers.

Measures School climate
Adolescent student perception of school climate was assessed with the Perceived School Climate Questionnaire developed by Bao et al, 30 please see full details of the questionnaire in the Appendix. This scale contains six items, which were answered using a 4-point rating scale from 1 (never) to 4 (always). This scale is suitable for use with adolescents in the Chinese school environment, which is reliable among adolescents in China (α =0.85), 31 and it is also significantly correlated with the "Perceived School Atmosphere Questionnaire" as developed by Jia et al, 17 (r =0.44, p< 0.001), and the validity of the questionaire has been supported. 32 In this study, we deleted the item "students at this school are often teased or picked on" because of low item-total correlation; responses across the rest five items were averaged after reverse scoring, with higher scores representing more positive perceptions of school climate, 30 and Cronbach's alpha was 0.82.

Psychological suzhi
We examined psychological suzhi using the Psychological Suzhi Questionnaire for Middle School Students, 33 please see full details of the questionnaire in the Appendix. The questionnaire includes 24 items examining the following dimensions of psychological suzhi: cognitive quality, individuality, and adaptability, which were answered using a 5-point Likert-type scale from 1= totally disagree to 5= totally agree. Responses across the 24 items were averaged; higher scores indicate greater psychological suzhi. This questionnaire is suitable for adolescents in the Chinese school environment to use, and it is reliable among adolescents in China (α =0.94 for the total scale and ranged from 0.83 to 0.87 for the subscales). 34 In this study, Cronbach's alpha of the total scale was 0.93 and ranged from 0.80 to 0.86 for the subscales.

Alcohol use
We assessed alcohol use using the Adolescents' Alcohol Use Questionnaire developed by Ye et al, 35 which is suitable for use with adolescents in China. The questionnaire includes two items addressing alcohol use frequency (how many days have you been drinking in the past 30 days?) and alcohol use quantity (in the past 30 days, how many cups of beer do you drink every day?Cups: 4 cups of beer =1 bottle of beer =50 g of liquor) each item. Alcohol use frequency is answered using a 6-point rating scale from 1 (never) to 6 (20-30 days), and alcohol use quantity is answered using a 6-point rating scale from 1 (never) to 6 (more than 10 cups). Responses across the two items were averaged, with higher scores representing more alcohol use. In this study, Cronbach's alpha was 0.82.

Analytic strategy
The Statistical Package for Social Sciences (SPSS) Version 22.0 was used for data analyses. First, to investigate the general tendency of the measured variables, the mean and standard deviation for each variable, as well as the Pearson correlation coefficients between the variables, were analyzed. Next, since this study all used students' self-reports, it was not suitable to adopt multi-level modeling or hierarchical linear modeling. Thus, we used the PROCESS macro (http://www.alhayes.com) available for SPSS 36 to conduct moderation analyses. Concretely, we adopted Model 1 (especially for moderation analyses) to examine the moderating role of psychological suzhi on the relationship between school climate and alcohol use. We used 5,000 bootstrap samples, and biases were corrected at 95% confidence intervals (CI) to calculate the indirect effect of each variable. If the CI of the indirect effect did not include zero, then the indirect effect was significant at p=0.05. 37 Table 1 displays the gender differences for school climate, psychological suzhi, and alcohol use. Boys used alcohol significantly more than girls did. Table 2 displays the correlations prior to the moderation analysis. School climate was significantly positively correlated with psychological suzhi, and both of them were significantly negatively correlated with alcohol use. Additionally, we also computed the correlations between the three study variables and demographic variables (age and gender); only gender was significantly negatively correlated with alcohol use. Table 3 shows the results of the moderation analysis performed to examine the moderating role of psychological suzhi between school climate and alcohol use after controlling for gender. School climate significantly negatively predicted alcohol use (β = -0.139, p<0.001). Psychological suzhi significantly negatively predicted alcohol use (β = -0.167, p<0.001). Concurrently, the interaction of school climate and psychological suzhi significantly positively predicted alcohol use (β =0.093, p<0.01). Therefore, psychological suzhi moderated the relationship between school climate and adolescents' alcohol use. To facilitate the interpretation of this moderating effect, Figure 1  presents the predicted alcohol use value as a function of school climate and psychological suzhi. Simple slope tests 38 revealed a no significant regression slope of school climate on alcohol use in the high psychological suzhi group (β= -0.046, p>0.05). However, the effect of school climate on alcohol use was significant in the low psychological suzhi group (β= -0.233, p<0.001). Namely, the effect of school climate on alcohol use was stronger for low psychological suzhi adolescents than for high psychological suzhi adolescents, which showed that the prediction effect of school climate on alcohol use was gradually weakened with the improvement of adolescents' psychological suzhi. Therefore, psychological suzhi served as a protective factor, reducing the potential risk of low school climate increasing adolescents' alcohol use.

Discussion
School climate was negatively associated with adolescents' alcohol use, and low school climate may increase alcohol use. This result supports Hypothesis 1. To our knowledge, this study is one of the first to confirm the impact of school climate on alcohol use among Chinese adolescents. A positive school climate was associated with lower alcohol use among adolescents, which was consistent with previous findings, 18,19 which was also similar to Zhang et al, 39 as they find that school climate can effectively predict Chinese adolescents' school adjustment. It is proved that low school climate may increase alcohol use in different social contexts, thus showing cross-cultural consistency.
As adolescents age, the main environmental factor gradual shifts from family to school, and individuals' close relationship with parents is gradually replaced by the ones with peers. 40 This is especially true of many Chinese adolescent students who live at their school, especially for students from country, and their residence time generally lasts 6 years from seventh grade to 12th grade until the end of college entrance examination. Therefore, adolescents are most exposed to their teachers and peer classmates, the most familiar environment is their school. That is, teachers and peers play an important role in adolescents' psychology and behavior development. Jia et al, 17 found that the perceptions of teacher support and peer support were positively associated with adolescents' self-esteem and grade point average, but negatively associated with depressive symptoms among both Chinese and American adolescents. These support systems may be related to alcohol use. When adolescents cannot perceive support from their teachers and peer of school climate, or perceive the vast academic pressure from their teachers, and this may one reason why they begin and keep alcohol    41 This indicated us that we should try our best to create a good school climate (ie, teacher emotional warmth) to help reduce alcohol use. Psychological suzhi moderated the association between school climate and alcohol use. Specifically, the association between school climate and alcohol use was much weaker for adolescents with higher levels of psychological suzhi. This result supports Hypothesis 2, and it also supports the psychological suzhi's function role, 27 the organism-environment interaction model, 28 , and the risk-protective model. 29 Psychological suzhi was negatively associated with adolescents' alcohol use, which was similar to Liu et al, 42 as they find that psychological suzhi negatively significantly predict adolescents' problem behaviors. High psychological suzhi adolescents generally display high cognitive quality and individuality (ie, the ability to accurately understand and respond to objects and form reasonable beliefs), and good adaptability (ie, the ability to effectively control their emotions and behavior). 43 Thus, for adolescents in the school environment, higher psychological suzhi may lead to better internal regulation and coping in a wide range of life events, thereby reducing problem behaviors (eg, alcohol use).
School climate is an environmental factor, and psychological suzhi is an important part of individual traits, which as organism factor according to organism-environment interaction model. 28 Individuals with certain individual traits (psychological suzhi in the current study) respond differently to similar environmental contexts (low school climate in the current study), and not all individuals are equally influenced by the environment. In the present study, adolescents who have high psychological suzhi were more likely to buffer the effect of low school climate on alcohol use, which was similar to Zhao et al, 44 as they find that high psychological suzhi buffers the effect of high peer victimization on adolescents' problem behaviors. Psychological suzhi as a protective factor, 27 would weaken the relationship between risk (low school climate in the current study) and outcome (alcohol use in the current study), and play a decisive role between risk and outcome. 29 The results indicated that when adolescents perceive a positive school climate, their alcohol use may decrease. Moreover, even when a school has a negative climate, it is possible for alcohol use to decrease if adolescents have elevated levels of psychological suzhi to protect themselves. On the basis of building a good school climate, it is probably more effective to pay more attention to improve the psychological suzhi of adolescents as we have mature interventions and cultivation strategies could help children and adolescents to cultivate their psychological suzhi. 25  The current study has several strengths and practical implications. This was the first study to explicitly test the associations between school climate and alcohol use in adolescents who live in China and the moderating effect of psychological suzhi on the relationship between school climate and adolescents' alcohol use. The results indicated that both school climate and psychological suzhi could serve as protective factors for adolescents to reduce the potential risk. In order to protect adolescents' healthy physical, psychology, and social development by reducing alcohol use, we can build a good school climate by formulating of national level legal and regulations and good social norms. For example, changes to the minimum legal drinking age as well as in perceived social norms have been shown to contribute to decrease alcohol use in the United States; 45 the Chinese government also explicitly stipulates that liquor operators are not allowed to sell alcoholic products to minors (<18 years old). Additionally, we can also adopt effective and efficient intervention strategies to improve school climate. For example, previous research demonstrated that TEI Program, an intervention based on peer tutoring, is effective in reducing bully and cyberbully behavior, and at the same time, improving the school climate. 46 Psychological suzhi could serve as a protective factor for adolescents to reduce the potential risk of low school climate for increased alcohol use. This indicated us we can pay more attention to cultivating and implement strategies for the development of adolescent psychological suzhi and in order to better play its role in protection. Adolescence is a key stage for psychological suzhi development, 25 and there are many mature interventions or cultivation strategies to improve adolescents' psychological suzhi, such as special training mode and implementation strategies. 25 Several limitations should be also noted highlight the need for cautious interpretation of our findings, and offer some guidance for future research. First, we used a crosssectional design; therefore, we cannot infer causal relationships between the examined variables. Future research should use a longitudinal or experimental design to test such possible relationships. Second, we used self-reported measures for all variables, it was not suitable to adopt multi-level modeling or hierarchical linear modeling to control student-level and school-level characteristics. Future research could use multiple methods, such as teacher reports to measure school climate. Lastly, we only examined alcohol use in schools, and people's attitudes toward alcohol use may differ in diverse contexts. 20

Conclusion
We found that both school climate and psychological suzhi significantly negatively predicted adolescents' alcohol use, the interaction of school climate and psychological suzhi significantly positively predicted adolescents' alcohol use after controlling for gender, and the effect of school climate on adolescents' alcohol use was stronger for low as compared to high psychological suzhi adolescents. We demonstrated the key roles of school climate and psychological suzhi in reducing adolescents' alcohol use. Psychological suzhi served as a protective factor, reducing the potential risk of low school climate increasing adolescents' alcohol use.