The Impact of Family Supportive Supervisor Behavior on Employee’s Proactive Behavior: A Study of a Moderated Mediating Effect

Based on the theory of social exchange, this study attempts to probe the 
mechanism of the impact of the family supportive supervisor behavior on employee’s proactive behavior, especially to 
explore the mediating role of the affective commitment and the moderating role 
of the power distance in Chinese organizational context. After analyzing the 
samples collected from 305 employees, we found that: family supportive supervisor behavior has a significantly positive 
effect on employee’s proactive behavior; affective commitment plays a partial 
mediating role between family supportive supervisor behavior and employee’s proactive 
behavior; meanwhile, power distance moderates the relationship between family 
supported supervisory behavior and affective commitment, and further moderates 
the indirect relationship between family supported supervisory behavior and 
employee’s proactive behavior through affective commitment. That is, the lower 
the employees’ power distance is, the stronger the mediating effect of affective 
commitment becomes.


Introduction
As the nature of work is continuously evolving, so too are work and family lives becoming increasingly intertwined, creating strain for employees trying to function successfully in both domains. Most employees struggle between work and family responsibilities, and the resulting great pressure has some negative effects fill their responsibilities of work and family and improve the relationship between work and family [6]. Previous studies have shown that FSSB has a positive impact on employees' work attitude and behavior, and some scholars also call for strengthening the link between FSSB and work-related results in the future [7].
Although Chinese researchers have begun to pay attention to this field, the relevant research is not much. Although a few studies have shown that family supportive working environment can affect employees' attitudes and behaviors such as job satisfaction, job engagement, turnover tendency and job performance [8]. However, few studies have explored the influence of FSSB on employees' extra-role behaviors in the workplace. As an incentive factor to help employees achieve work-family balance, whether its influence will be further extended to the outcome variable at the further organizational level is worth further discussion. In addition, employees' attitudes and behaviors in the workplace are influenced by many factors, one of which is leadership style, a positive leadership style motivating subordinates to take the initiative. Research shows that transformational leadership leads subordinates to exceed work standards and positively predicts individual innovation behaviors assessed by superiors [9]; Leader-member exchange relationship will have a certain impact on the individual's proactive behavior, and a good leader-member relationship will also stimulate the individual's innovative behavior and constructive behavior [10].
However, if there is a lack of trust and responsibility between leaders and subordinates, the psychological security of subordinates will be reduced and individual initiative will be avoided. This research space still requires considerable attention to further develop our understanding of the explanatory mechanisms linking leadership to employees' behaviors. The model in this study is grounded predominantly in social exchange theory and its immediate correlates (e.g. the norm of reciprocity, equity theory), we aim to examine the influence and mechanism of FSSB on employees' proactive behaviors. This study believes that FSSB, as a positive leadership behavior to help employees fulfill their family responsibilities, will enhance employees' proactive behaviors in the workplace. As an emotional mechanism that drives employees' positive organizational beha-  [11], affective commitment is likely to play an intermediary role in the relationship between FSSB and employees' Proactive behaviors. However, the performance of leadership is often related to its situational characteristics. Different power distance may lead to different sensitivity of employees to FSSB. Therefore, this study will further examine its moderating effect between FSSB and employees' proactive behaviors in the workplace. The research model of this paper is shown in Figure 1.

FSSB and Employee's Proactive Behavior
Proactive behavior refers to the behavior of an employee who spontaneously changes the situation (introduces new working methods, influences organizational strategies) and/or changes himself/herself (learns new skills to cope with future work demands), emphasizing future orientation and change orientation [12]. For example, employees offer Suggestions to the organization, actively seek ways to improve their work, and solve problems with foresight are the main manifestations of proactive behaviors. There are many factors that affect employees' Proactive behaviors. Leadership behavior, as an important situational variable, plays an important role in predicting employees' Proactive behaviors [13]. Firstly, family support supervisors take the initiative to care about employees' family life, respect and understand employees, and provide supportive resources and services to help employees fulfill their work and family responsibilities when needed. This is an important and attractive resource for employees. According to social exchange theory, one party provides something of great value to the other party, which will prompt the other party to give back [14]. The supervisor's enactment of family-supportive behaviors, a valued resource, acts as a service resource and leads to a response from the employee. However, resources are not exchanged randomly; a resource exchanged in one direction is likely to be reciprocated via a resource that is of the same resource type [15]. Based on Wilson et al.'s resource categorization [16], FSSB is a service resource that will likely be exchanged for another service resource (e.g., task and non-task performance). Moreover, given family-supportive supervisors provide support beyond task performance (e.g., help managing competing priorities, flexible hours), FSSB is likely seen as an extra-role service resource such that it is beyond the normal job requirements of a leader. Therefore, when reciprocating, employees will likely (potentially unconsciously) choose a similar extra-role behavior beyond their day-to-day task performance. That is, employees respond to the "above and  beyond" leader with "above and beyond" behavior [17]. Secondly, a study by Chalofsky found that there is a relationship between work-life fit and meaningfulness, suggesting that the better work and life merge, the more employees experience meaningfulness at work [18]. FSSB provides employees with sufficient time flexibility to manage their work and family needs, so that employees can ensure the completion of work tasks and the realization of organizational goals while fulfilling their family roles. Such a working environment will enhance employees' sense of work self-efficacy and make them realize the value and significance of work, so as to stimulate employees' strong sense of identity to their own jobs and organizations and to stimulate their intrinsic motivation to work more actively. Thirdly, Ahmadi and Mirsepassi put forward the "performance transfer" effect in their study, that is, when subordinates perceive that the boss puts a lot of energy into their work, they will follow suit and increase their work input [19]. As an extra-role behavior beyond the supervisor's job responsibilities, FSSB reflects the supervisor's extra efforts in work. Employees will imitate the supervisor's input in work to enhance their willingness to actively contribute to the organization. Ultimately, we hypothesize that: Hypothesis 1: FSSB is positively related to employee's proactive behavior.

Mediating Influence of Affective Commitment
Affective commitment refers to the employees to positive emotional attitude and organization reflects the employees on the degree of emotional attachment, identification and involvement in the organization [20]. As an important agent of the organization, supervisors manage the employment relationship with employees on behalf of the organization [21]. Therefore, the leadership style or behavior of leaders will greatly influence employees' evaluation of their employment relationship with the organization. Employees will think that FSSB not only represents the supervisor's care, respect and recognition for themselves, but also represents the organization's care for their family and work field. In this way, the exchange relationship between employees and supervisors will be developed into the relationship between employees and the organization, and the identity and sense of belonging of employees to the organization will be enhanced. As Panaccio and Vandenberghe noted, employees' perceptions of support from the organization (by way of organizational policies or supportive supervisors) amounts to the workers' recognition that their employer appreciates their contributions to the company's success [22], and is therefore willing to assist and support the employee. The supervisor is the organizational representative with whom the employee interacts on the most frequent basis, so when the supervisor is not supportive of employees' needs (or the employees do not sense that supportiveness), it could logically lead to a decrease in employees' commitment to the organization due to their inability and/or aversion to working optimally under an unsupportive organizational representative. The reverse is also logically plausible: that employees enjoy working for an organization that recognizes and supports its employees, so they in turn become more affectively com-Open Journal of Social Sciences mitted to the organization. Substantial research on positive management practices has supported this contention (for a review, see [23]).
Employees with affective commitment will develop a sense of belonging and identity to the organization, which can increase employees' involvement in organizational activities and make them willing to pursue organizational goals and desire to stay in the organization and make their own contributions to the development of the organization. As a challenging active organizational behavior, employees' affective commitment to the organization may be an important factor to predict their Proactive behaviors. Employees with high affective commitment are more likely to recognize the organization's strategies and goals. They will not be limited to completing their daily work, but will actively look for various ways and means to improve the organization's operation. Employees with low affective commitment are more likely to consider that engaging in Proactive behaviors will lead to pressure and risks, and are less willing to make extra ef-

Moderating Influence of Power Distance
Power distance as an important cultural values of the variables, at the national or social level, refers to how a society accept unequal distribution of power in organizations or institutions [24], at the individual level, it reflects the organization of the individual perception of power difference between the superior and the subordinate or values [25]. Power distance in this study refers to the psychological characteristics that reflect the differences of individual values at the individual level. In the study of organizational behavior, power distance is often used as an important regulatory variable to study the relationship between leadership Open Journal of Social Sciences behavior and employee behavior [26]. As a role norm, it clarifies the agreed behaviors and obligations of both parties in the relationship and explains the influence of leadership on the attitude and behavior of subordinates [27]. In this study, different power distance is expected to lead to different sensitivity of employees to FSSB, which will lead to different effects of FSSB on employees' affective commitment.
High power distance employees highly revered authority, they expressed fear for leadership, believe that leadership is inaccessible, and leadership is the psychological distance, also won't have too much work outside, so when in trouble, employees in the aspect of family responsibilities tend to suppress their true ideas rather than seeking leadership help. Even in the high FSSB situation, when supervisors provide supportive resources and help to subordinates, employees may not be grateful for such kind of goodwill behavior, so the positive effect of FSSB on employees with high power distance will be weakened. On the contrary, employees with low power distance are less sensitive to power differences between superiors and subordinates and tend to define the exchange with leaders as an interpersonal communication. They believe that leaders are approachable and usually develop a personalized relationship with them [28]. When the family needs help, they will fully seek support and help from the supervisor. At the same time, when they get the resources and support from the supervisor, they will have higher gratitude and sense of obligation to return based on interpersonal reciprocity norms. Such behavior of respecting and caring for employees' families, as well as the organizational atmosphere formed on this basis to help employees achieve work-family balance, will undoubtedly enhance employees' strong identification and dependence on the organization. Studies have also shown that organizational support has a stronger positive impact on the affective commitment, job satisfaction and OCB of individuals with lower power distance [29]. Therefore, this study believes that the positive effect of FSSB on employees' affective commitment will have different influences at different power distance levels. To sum up, we propose the following hypothesis:

Sample and Procedure
In this study, questionnaire survey method was adopted to collect data with the

Measures
The measurement tools used in this study were developed mature scales, and all scales were scored by likert 5-point scale. "1" to "5" respectively represented "strongly disagree" to "strongly agree" or "never" to "frequently". The Cronbach alpha coefficients of each scale in this study are shown in Table 2

Confirmatory Factor Analyses
We used Lisrel to conduct confirmatory factor analyses (CFAs) using the maximum likelihood estimation method so we could examine the independence of the study variables. As depicted in Table 1, the goodness of fit statistics of our baseline model (Model IV) shows that our measurement model was appropriate: χ 2 /df = 2.26, root mean square error of approximation (RMSEA) = 0.06, non-normed fit index (NNFI) = 0.97, and comparative fit index (CFI) = 0.97. This indicates that these five variables have good discriminant validity and represent five different constructs.

Descriptive Statistics and Correlations
The means, standard deviations, and zero-order bivariate correlations reported in Table 2 were in the expected directions and of the expected magnitudes. Among them, FSSB was significantly positively correlated with affective commitment (r = 0.48, p < 0.001) and Proactive behavior (r = 0.33, p < 0.001); Affective commitment is also significantly positively correlated with employees' proactive behaviors (r = 0.36, p < 0.001).    Table 3 showed that FSSB was positively related to proactive behavior (β = 0.34, p < 0.001), thus supporting Hypotheses 1. Model 2 showed that family supportive supervisor behavior was positively related to affective commitment (β = 0.45, p < 0.001) and Model 6 showed that affective commitment was positively related to proactive behavior (β = 0.30, p < 0.001). In addition, FSSB was still positively related to proactive behavior (β = 0.21, p < 0.01). Therefore, affective commitment plays the mediating role between FSSB and employees' proactive behavior (Effect = 0.13, 95% Bootstrap CI = [0.06, 0.23]), thus supporting Hypotheses 2. According to model 3, the interaction term (FSSB × Power distance) was positively related to affective commitment (β = −0.15, p < 0.01), which indicates that power distance negatively regulates the relationship between FSSB and affective commitment, and hypothesis 3 is supported. We further conducted simple slopes analysis to better interpret the interaction effect. The interaction effect of FSSB and power distance on employees' affective commitment is shown in Figure 2. When the employee power distance orientation is high, FSSB will trigger the affective commitment of employees (β = 0.20, p < 0.01), while this positive relationship will be strengthened when the employee power distance orientation is low (β = 0.42, p < 0.001).

Model 5 in
Using the process modeling macro (Hayes, 2013), we tested the indirect effects of FSSB contingent on specific values of power distance (e.g., 1 SD above and below the mean). As reported in Table 4

Discussion
First, this study confirms that FSSB has a significant positive effect on em- Secondly, this study found that affective commitment plays a part of mediating role between FSSB and employees' proactive behaviors. That is to say, FSSB can not only directly affect employees' proactive behaviors, but also further lead to more proactive behaviors by enhancing employees' affective commitment to the organization. Many studies show that emotional state plays an extremely important role in driving individual behaviors [31]. From the perspective of social exchange, this study reveals the relationship between FSSB and employees' proactive behaviors from the perspective of emotional state, which is also a supplement to existing studies. As the agent of the organization, the supervisor has the most frequent interaction with the supervisor, and the leadership behavior is the direct factor that affects the affective commitment of employees to the organization. The care, support and understanding of the management for employees directly reflect the respect, support and understanding of the organization for employees. Driven by the principle of reciprocity, especially in the Chinese society that attaches great importance to human feelings, it is easier to stimulate employees' gratitude and return, increase their emotional return to supervisors and organizations, and thus increase their initiative in work.
Finally, this study also found that power distance has a moderating effect between FSSB and employees' proactive behaviors. Due to different cultural value orientation, individuals may have different expectations for others' way of getting along with them in the process of social communication, which in turn will affect individuals' way of response [32]. This study introduced the employee power distance under the background of traditional Chinese culture and investigated its contingency effect in the relationship between FSSB and employees' proactive behaviors. The results show that compared with individuals with high power distance orientation, employees with low power distance orientation are more likely to be affected by FSSB. Employees with low power distance orientation tend to get along with supervisors on an equal basis. Therefore, they will fully perceive and take advantage of the good-will support behaviors provided by supervisors to solve their own problems in work and family fields, and enhance their gratitude to supervisors and emotional attachment to their organizations after receiving help, so as to promote their active behaviors; On the contrary, employees with high power distance orientation may be less willing to communicate family problems and seek help with the supervisor due to the large power gap between them and the supervisor, so their emotional attitude and behavioral

Limitations and Directions for Future Research
This study also has some limitations, which can be improved in the future research. First of all, although the research design of multi-period data collection is adopted in this study to minimize common method bias, it is still not a longitudinal study in a strict sense. Meanwhile, employees' self-assessment is adopted, and the causal relationship between variables is difficult to be completely determined. In the future, we can further study the influence mechanism of FSSB on subordinates' proactive behaviors dynamically through longitudinal follow-up research, or adopt the optimal design combining situational experiment and multi-source mutual assessment questionnaire survey, so as to make the research conclusion more reliable. Secondly, the subjects in this study come from a limited number of regions and enterprises, which limits the external validity of the research conclusions to some extent. In future research, the sample sources should be further expanded to enhance the universality of the research conclusions. Finally, this study takes FSSB as a whole construct to explore its influence mechanism on employees' proactive behaviors. Whether there are significant differences in the influence effect of different dimensions of FSSB on employees' proactive behaviors remains to be further studied in the future.

Implications for Practice
This study also has some practical enlightenment. Given that the FSSB is likely to stimulate employees' initiative in the workplace, organizations should give full play to the role of supervisors in creating family-supportive work environments, meeting employees' needs for belonging and respect, and maximizing employees' work initiative. The organization can implement from the aspect of human resource management practice. First of all, in the process of talent recruitment and selection, we can select the supervisor who is relatively satisfied with FSSB. Secondly, studies have shown that the FSSB is malleable and therefore trainable [33]. Based on this, the organization can increase investment in training. For in-service supervisors, the organization can develop corresponding training courses to help managers learn how to provide better family support for subordinates, and deepen supervisors' cognition and implementation ability of behaviors conducive to employees' work and family relationship. Finally, FSSB can be incorporated into the performance appraisal standard for supervisors, so as to strengthen supervisors' family-supporting behaviors for employees in need

Conclusion
Based on a questionnaire survey of 305 employees in enterprises, this study explores whether FSSB can promote employees' proactive behaviors in the workplace and its action mechanism. The results show that: 1) FSSB is positively related to employee's proactive behavior; 2) Affective commitment plays a partial mediating role in the relationship between FSSB and employee's proactive behaviors; 3) Power distance has a significant moderating effect on the relationship between FSSB and emotional commitment. When the power distance orientation is low, the relationship between FSSB and employee affective commitment is stronger.

Conflicts of Interest
The author declares no conflicts of interest regarding the publication of this paper.