The phubbing phenomenon: a cross-sectional study on the relationships among social media addiction, fear of missing out, personality traits, and phubbing behavior

Pathological phubbing behavior has become an increasingly prevalent issue in recent years yet research surrounding these technological concerns remains scarce. The current study seeks to contribute to this limited body of research by providing insight into the antecedents of excessive and severe phubbing behavior and potential risk factors of pathological technology use as a whole. 938 undergraduate students participated in a cross-sectional study to determine whether demographic variables, personality traits, and degrees of social media addiction and fear of missing out could explain phubbing behavior. Participants responded to a survey that included the Bergen Social Media Addiction Scale (BSMAS), Fear of Missing Out Scale (FoMO), Ten-Item Personality Inventory (TIPI), and Phubbing Scale (Phubbing). Bivariate correlations identified that BSMAS and FoMO were significantly positively correlated with phubbing while TIPI displayed a significantly negative correlation with phubbing. Further, hierarchical multiple regression analyses established that BSMAS holds the most predictive power for phubbing while FoMO displayed a significantly less robust predictive power. TIPI was shown to be significant but served less to explain the variance in phubbing behaviors.


Introduction
The widespread use of smartphones that has emerged over the past century has undoubtedly seen numerous benefits; however, the convenience of smartphones and in turn, the rapidly growing accessibility of the worldwide internet has not been without its problems. One specific phenomenon the widespread accessibility of smartphones has caused is phubbing, which refers to an individual's obsessive use of the smartphone instead of having interpersonal conversations with other individuals in a social setting (Karadağ et al., 2015). Phubbing has become normative in modern-day communication (Karadağ et al., 2015;Chotpitayasunondh & Douglas, 2018a) and has been cited to be at the intersection of many immediate issues on both an intrapersonal and interpersonal scale. Among them, numerous studies have found phubbing to be positively linked to social media addiction (Karadağ et al., 2015;Franchina et al., 2018;Błachnio & Przepiórka, 2019;Nazir & Bulut, 2019;Balta et al., 2020). Phubbing behavior has also been shown to be positively associated with other intrapersonal traits like the fear of missing out (FOMO) (Blanca & Bendayan, 2018;Davey et al., 2018;Franchina et al., 2018;Balta et al., 2020). Studies investigating the potential role of personality traits on phubbing behavior have also concluded that certain personalities serve as risk factors while others serve as protective factors for phubbing behavior (Chotpitayasunondh & Douglas, 2018b).
Social media, platforms and applications that enable social networking, community-based interaction, and content-sharing, has become pathological for some users due to their excessive use. For some, this may develop into an obsessive-compulsive, excessive, and unrestrained use of social media platforms (Young, 1999). In the majority of studies on phubbing behavior, among the leading predictors of this behavior are addictive tendencies, and perhaps most importantly, addiction to social media (Franchina et al., 2018;Błachnio & Przepiórka, 2019;Nazir & Bulut, 2019;Balta et al., 2020). In the same vein, Salehan and Negahban (2013) have also shed light on the pathological use of social media even at the expense of deteriorating interpersonal relationships caused by phubbing behaviors. Research on psychological factors associated with phubbing and social media addiction has also raised awareness over the fear of missing out as a predictor of phubbing behavior (Chotpitayasunondh & Douglas, 2016;Blanca & Bendayan, 2018;Davey et al., 2018;Franchina et al., 2018;Balta et al., 2020).
FoMO has been defined as "a pervasive apprehension that others might be having rewarding experiences from which one is absent," or "the desire to stay continually connected with what others are doing" (Przybylski et al., 2013, p.1). FoMO, or similarly, the fear of missing out on important information pertaining to friends on social media can be associated with smartphone overuse (Hong et al., 2012) and in turn, can lead to phubbing behaviors. This potential relationship between FoMO and phubbing behavior was confirmed by a study that determined FoMO drives excessive smartphone use and in turn, phubbing behavior in Flemish adolescents (Franchina et al., 2018). Subsequent research has also suggested that people high in FoMO are likely to overuse their smartphones and as a consequence, phub others to satisfy the need to stay connected online (Balta et al., 2020).
Previous studies have shown that certain individuals are more prone to having FoMO than others (Stead & Bibby, 2017), and studies have also identified the TIPI (a 10-item measure of the Big Five personality dimensions) personality traits to be predictors of social media addiction . Specifically, a person's propensity toward mobile phone addiction as well as excessive social media use has been shown by several studies to be predicted by levels of certain personality traits such as extraversion (Ehrenberg et al., 2008;Zamani et al., 2011;Andreassen et al., 2013;Zhou et al., 2016), agreeableness (Butt & Phillips, 2008;Ehrenberg et al., 2008;Zhou et al., 2016), conscientiousness (Kayiş et al., 2016;Zhou et al., 2016), emotional stability (Bianchi & Phillips, 2005;Zamani et al., 2011), and openness to experience (Zamani et al., 2011;Andreassen et al., 2013;Zhou et al., 2016). Subsequent studies have also identified the personality traits that serve as protective and risk factors for problematic social media and smartphone use (Kuss et al., 2013). This study suspects that personality traits, which have been extensively shown to relate to social media addiction and smartphone overuse, may be associated with phubbing behaviors. Unlike personality traits and social media addiction, the existing body of research involving the relationship between personality traits and phubbing behavior is still in its infancy. Moreover, no study to date has examined the complex interplay among social media addiction, FoMO, TIPI, and phubbing behaviors. To address this gap in empirical knowledge, this study will seek to provide a comprehensive framework of these factors on phubbing behavior as it could prove to be critical for appropriate interventions and preventions to be put in place in efforts to reduce pathological phubbing behaviors and problematic smartphone use as a whole. With the existing literature and the study objectives in mind, this study puts forth the following hypotheses (i) the problematic use of social media platforms is the most significant risk factor for phubbing behaviors, (ii) individuals high in FoMO are more susceptible to exhibiting phubbing behaviors, and (iii) certain personality traits would serve as protective factors against phubbing behaviors and others would serve as risk factors for phubbing behaviors.

Participants and Procedure
The research sample comprised 938 undergraduate students, 48.4% of these male and 51.6% female. 22.4% of the 938 students are in the first year, 32.6% the second, 22.7% the third, 20.7% the fourth, and 1.6% are beyond their fourth year. The distribution of their majors is as follows: 39.6% humanities and arts, 16.6% social sciences, business and law, and 44.3% STEM. Finally, 78.14% of participants completed the questionnaire via pencil-and-paper and 21.86% of participants completed the questionnaire via Google Forms.
The data collection period spanned from November 2020 to February 2021 and questionnaires were distributed using a convenience sampling method. Self-administered penciland-paper questionnaires were utilized in addition to online Google Forms in order to increase the response rate. Penciland-paper questionnaires were distributed during university lectures with the permission of faculty members. Prior to filling out the questionnaires, students received relevant details regarding the study (purpose of study, questionnaire structure, confidentiality assurance, etc.) and were required to tick a checkbox indicating informed consent before completing the questionnaires. The study participants did not receive compensation of any sort.

Translation Procedure
The four research scales, the Bergen Social Media Addiction Scale (BSMAS), Fear of Missing Out Scale (FoMO), Ten-Item Personality Inventory (TIPI) and Phubbing Scale (Phubbing), were translated from English to Mandarin Chinese by the authors of the present study, who are native speakers. The Mandarin Chinese versions of the research scales were then back-translated and compared following the protocol from Beaton et al. (2000). There were no discrepancies between the two.

Instruments
The Bergen Social Media Addiction Scale The Bergen Social Media Addiction Scale (BSMAS) is a six-item selfreport measure constructed by Andreassen et al. (2016) for evaluating the problematic use of social media within a 12-month period. The instrument adopts the six core components of addiction (e.g., "spent a lot of time thinking about social media or planned use of social media") proposed by Griffiths (2000), salience, mood modification, tolerance, withdrawal conflict and relapse, and is rated on a five-point Likert scale ranging from very rarely (1) to very often (5) with scores ranging from 6 to 30. A higher score on the BSMAS implies a greater risk of addiction to social media, and a BSMAS score over 19 suggests an individual is prone to developing a problematic use of social media (Bányai et al., 2017).
Furthermore, the scale has been confirmed as a unidimensional structure with time invariance  as well as measurement invariance from Hong Kong and Taiwan . The high internal consistency (α = 0.85) of the BSMAS reflects its reliability (Bányai et al., 2017). The BSMAS has also been proven to be reliable and valid among Taiwanese participants Leung et al., 2020). In the present study, the internal consistency of the translated BSMAS was 0.867.

Fear of Missing out Scale
Fear of Missing Out scale (FoMO) is a one-factor ten-item self-report measure (e.g., "I fear others have more rewarding experiences than me") developed by Przybylski et al. (2013). Each item is rated on a five-point Likert scale ranging from Not at all true (1) to Extremely true (5), yielding a score ranging from 10 to 50. A higher overall score on the FoMO implies a higher level of FoMO in participating students.
The FoMO has satisfactory psychometric properties with high internal consistency (α = 0.81), and the testretest reliability coefficient is 0.81 (Gokler et al., 2016). The FoMO was proved to be valid among Chinese students (Xie et al., 2018) and the translated FoMO is shown to be reliable in the present study with a Cronbach's α of 0.845.Ten-Item Personality Inventory For personality measurement, the Ten-Item Personality Inventory (TIPI) developed by Gosling et al. (2003) was employed to assess the Big Five personality traits (e.g., "Extraverted, enthusiastic"), namely extraversion, agreeableness, conscientiousness, emotional stability, and openness to experience. Each dimension is measured by two items on a seven-point Likert scale ranging from strongly disagree (1) to strongly agree (7), generating a composite score ranging from 2 to 14 for each trait. The trait with the highest composite score is then considered to be the dominant personality trait for the participant.
The TIPI has satisfactory psychometric properties with good internal consistency (Spearman-Brown' r = 0.29 ~ 0.74) (Balcerowska, et al., 2020). The TIPI has been previously validated among Chile, Hong Kong, and Poland undergraduate university students (Przepiorka et al., 2020). The present study does not utilize Cronbach's Alpha coefficients but instead employs Spearman-Brown coefficients for its reliability test for the reason that Spearman-Brown coefficients account for the small number of items per dimension (Eisinga et al., 2013) as well as the opposite polarity of the two items per trait (Gosling et al., 2003). The Spearman-Brown coefficients for the extraversion, agreeableness, conscientiousness, emotional stability, and openness to experiences were 0.652, 0.127, 0.199, 0.102, and 0.335, respectively.

Phubbing Scale
The Phubbing Scale (Phubbing) developed by Karadağ et al. (2015) assesses phubbing behavior using ten items that can be classified into two subscales that include communication disturbance (Phubbing CD ) illustrated in questions 1-4 (e.g., "My eyes start wandering on my phone when I'm together with others") and phone obsession (Phubbing PO ) in questions 5-9 (e.g., "I don't think that I annoy my partner when I'm busy with my mobile phone"). Each question is rated on a five-point Likert scale ranging from never (1) to always (5), generating a composite score ranging from 10 to 50, the higher the composite score, the more severe the student' s phubbing behavior. Scores exceeding 45 indicate a higher likelihood of phubbing (Karadağ et al., 2016).
During the process of translating the Phubbing Scale, we discovered that there exists repetition for item 2 (I am always busy with my mobile phone when I'm with my friends) and item 4 (I'm busy with my mobile phone when I'm with friends). Upon asking the developer of the Phubbing, Professor Karadağ, we reached the decision to eliminate item 2 from our translated version of the Phubbing.
The Phubbing has been shown to be reliable with its high internal consistency of α = 0.87 and 0.85 for Phubbing CD and Phubbing PO , respectively (Karadağ et al., 2015) and has been validated among participants in Spain and Turkey (Balta et al., 2020;Blanca & Bendayan, 2018). The internal consistency of the translated Phubbing in the present study was 0.88 and 0.85 for Phubbing CD and Phubbing PO , respectively.

Statistical Analyses
In this study, the analyses were carried out using SPSS 19 and AMOS 21. The normality of data distribution was assessed with skewness and kurtosis tests. To examine the construct validity evidence for the Phubbing Scale, this study performed a confirmatory factor analysis (CFA) through the maximum likelihood estimation approach. To evaluate its goodness of fit, this study computed chi-square (χ 2 ) and normed χ 2 . Additionally, this study utilized four approximate model fit indices and two information criteria to determine whether the measurement models fit the data sets well (Kline, 2011). Comparative fit index (CFI), incremental fit index (IFI), standardized root mean square residual (SRMR), and root mean square error of approximation (RMSEA) were used as absolute fit indices while the Akaike information criterion (AIC) and the Bayesian information criterion (BIC) were used as model selection criteria. Categorical variables were expressed as numbers and proportions whereas continuous variables were presented with means and standard deviations. Chi-square tests of independence were conducted for comparisons of categorical variables while independent samples t-tests and One-Way ANOVA tests were used for continuous variables. Pearson's correlations were utilized to determine the bivariate correlations between BSMAS, FoMO, TIPI traits, and Phubbing. Fisher's r-to-z transformation was employed to investigate the significance of the differences between the magnitudes of the different assessments. The relationships of BSMAS, FoMO, TIPI traits, and Phubbing were further investigated using multivariate hierarchical regression models, which were controlled for potential confounders. In more detail, the Phubbing subscale scores (i.e., Phubbing CD and Phubbing PO ) and the Phubbing composite scores (Phubbing OVERALL ) were used as the dependent variables while BSMAS, FoMO, and TIPI traits were utilized as independent variables; gender, class year, major, and questionnaire administration mode were treated as confounding variables. P-values were two-tailed for all tests and a probability value of p < 0.05 was considered as the significance level. Table 1 reveals the descriptive statistics of the research variables of this study. The coefficients of skewness and kurtosis were all within the recommended threshold (Garson, 2012). Therefore, it can be concluded that no serious problems for normality were present.

Differences Based on Demographics
In addition, Table 2 shows that the mean scores of Phubbing and the scores on its subscales for male students were significantly higher than their female counterparts, with a respective 3.950, 5.026, and 2.185 t statistic. However, there exist no significant differences for Phubbing and its subscales on class year, major, and questionnaire administration mode. BSMAS = Bergen Social Media Addiction Scale; FoMO = Fear of Missing Out Scale; TIPI = Ten-Item Personality Inventory; Phubbing OVERALL = the Phubbing Scale composite score; Extraversion, Agreeableness, Conscientiousness, Emotional Stability, and Openness to Experience were TIPI personality traits; Phubbing CD and Phubbing PO were two subscales of the Phubbing Scale.

Construct Validity
This study tested two models to examine construct validity: the one-factor model (Model 1F), in which all items were assessed as one common scale of Phubbing, and the twofactor model (Model 2F), in which items were divided into two factors reflecting the two subscales (Phubbing CD and Phubbing PO ) of Phubbing. As seen in Table 3, both models did not fit the data and were respecified inclosing the covariances between items (Model 1FC and Model 2FC). Chi-square difference model comparison tests indicated that there was a significant improvement in fit for Model 1F and Model 1FC (Δχ 2 (7) = 605.469, p < 0.01) and for Model 2F and Model 2FC (Δχ 2 (5) = 322.985, p < 0.01). In addition, Models 1FC (RMSEA = 0.101, SRMR = 0.056, CFI = 0.93, and IFI = 0.93) and 2FC (RMSEA = 0.114, SRMR = 0.071, CFI = 0.906, and IFI = 0.906) fitted the data significantly. Furthermore, composite reliability was greater than 0.6 (Phubbing OVERALL = 0.909, Phubbing CD = 0.820, and Phubbing PO = 0.846) and average variance extracted exceeded 0.5 (Phubbing OVERALL = 0.531, Phubbing CD = 0.538, and Phubbing PO = 0.525), showing that the latent variables possessed ideal convergence ability (Fornell & Larcker, 1981). Correlation Analysis Table 4 shows that BSMAS and FoMO were significantly positively correlated with Phubbing CD , Phubbing PO , and Phubbing OVERALL (r = 0.413 to 0.619) whereas TIPI traits, agreeableness, conscientiousness, emotional stability, were significantly negatively correlated (r = −0.007 to −0.278). The extraversion and openness to experience TIPI traits, specifically, had a significant negative correlation with Phubbing CD and Phubbing OVERALL but exhibited no correlation with Phubbing PO . To conclude, higher levels of BSMAS and FoMO suggest a higher severity of phubbing behaviors, and higher levels of TIPI suggest a reduced severity of phubbing behaviors.
The magnitudes of correlations between BSMAS and Phubbing (r = 0.519 to 0.619) were larger than those between FoMO and Phubbing (r = 0.413 to 0.487). To compare correlations, Fisher's r to z transformation was adopted to investigate the significance of the difference between magnitudes of the associations. The results revealed that for the respective Phubbing CD , Phubbing PO , and Phubbing OVERALL , the correlations with BSMAS were significantly stronger than the correlations with FoMO, with z test statistics of 3.757 (p = 0.001), 2.935 (p = 0.003), and 4.389 (p = 0.000), respectively. The Fisher's r to z transformation thus confirms that the independent variable BSMAS has a stronger correlation with Phubbing than FoMO does.

Discussion
Societal and psychological issues such as social media addiction and phubbing behaviors have become increasingly prevalent in recent years. It is in this regard that this study seeks to contribute to the rapidly growing literature in this area and to provide critical insight into what factors are contributing to the pathological use of technology in a broader sense. While this is an emerging and rapidly evolving field, research on these prominent issues is still in its infancy. To our knowledge, this was the first study to investigate the relationship among personality traits, the fear of missing out, social media addiction, and phubbing behaviors. Indeed, the present research seeks to illuminate the psychosocial factors behind pathological phubbing behavior and to provide insights into why phubbing behaviors, especially amongst teenagers and young adults, are so prevalent. To begin, this study provides evidence that gender plays an important role in phubbing behavior; however, in contrast to prior studies which found that females exhibit more severe phubbing behaviors than males do, our study indicates that male students phub more than their female counterparts (Karadağ et al., 2015;Chotpitayasunondh & Douglas, 2018b;Błachnio & Przepiorka, 2019). This study forms the following hypotheses in an attempt to explain these genderspecific phubbing behaviors. Firstly, despite our anonymous data collection procedure, a factor that's important to consider is the social desirability bias, a type of response bias that encourages respondents to answer survey questions in a way that will be viewed favorably by others. This causes respondents to overreport "desired" answers and underreport "undesired" answers. For instance, the female students in our sample may have underreported the socially undesirable phubbing activity because they were more affected by the social desirability bias than the male students in our sample (Karadağ et al., 2015;Chotpitayasunondh & Douglas, 2016).
In addition to the potential biases in our study, genderrelated disparities for addictive behaviors, in general, must also be examined when considering why male students seem to be more prone to exhibiting phubbing behaviors than their female counterparts. Studies from various fields have converged on the finding that males are more susceptible to addictive behaviors than females (Minutillo et al., 2016). For example, specific studies in the area of internet addiction disorders have found that there exists a higher prevalence of internet addiction among males than females (Tsitsika et al., 2014;Mei et al., 2016).
There could also be different societal factors at play; for instance, female adolescents are found to be under more supervision from their families than their male counterparts (Yu & Shek, 2018). This phenomenon could also imply that internet usage (e.g. social media and smartphone usage) is more tightly regulated for female students in this study than for male students. This hypothesis would also serve to explain gender-related disparities for communication disturbance, phone obsession, and phubbing in this study.
The bivariate correlations revealed significant relationships between multiple research variables and phubbing. In line with previous studies, this study determined a prominent relationship between social media addiction and habitual phubbing behavior (Karadağ et al., 2015;Franchina et al., 2018;Błachnio & Przepiórka, 2019;Nazir & Bulut, 2019;Balta et al., 2020). To explain why this is, Salehan and Negahban in 2013 put forth the optimal flow theory, which suggests that social media use is so entertaining for college students to the point where they continue their extensive and pathological use of social media and smartphones even at the expense of apparent consequences, such as phubbing behavior.
To further shed light on why this relationship exists, the study presents the following hypotheses supported by past literature. Firstly, much like the uses and gratification theories that were described in detail previously, the desire for individuals to gratify and satiate their social needs, such as the desire for increased popularity within one's social circle, turns one towards the pathological use of social media and social networking sites (Lee & Chiou, 2013). Additionally, a study conducted by Oberst et al. in 2016 demonstrated one of the many uses of social media; specifically, the ability of social media platforms to create a social identity for its user. Put simply, people are found to be increasingly dependent on social media platforms and online networking sites to construct their social identities; as opposed to focusing on their identity in person, they instead turn to building and improving their identities online. This phenomenon and the shift in the way people construct their social identities would undoubtedly be associated with an increased prevalence of social media overuse. For the perceived benefits associated with social media stated above-social support, fulfillment of social and psychological needs, construction of social identity-it would certainly be plausible to suggest that for users, keeping up and maintaining social media presence are associated with all of these benefits. An update or a notification, then, would prompt users to habitually and incessantly check their phones, which would inevitably manifest in phubbing behaviors in social situations.
This study determined that FoMO was positively associated with phubbing, which is in line with previous research investigating the relationship between FoMO and phubbing behavior (Chotpitayasunondh & Douglas, 2016;Blanca & Bendayan, 2018;Davey et al., 2018;Franchina et al., 2018;Balta et al., 2020). The following theories may serve to explain why a positive relationship between FoMO and phubbing exists: 1) uses and gratification theory and 2) relatedness self-determination theory. Firstly, those who have FoMO may turn to social media and smartphones in general to gratify their social needs (Blumler & Katz, 1974;Ajzen, 1991). The more severe the FoMO is, the more susceptible people are to depend on smartphones, and in turn, the more likely they are to exhibit phubbing behaviors (Balta et al., 2020). It would be reasonable to suggest that according to the uses and gratification theory (Ryan et al., 2014), people with FoMO would be more likely to depend on smartphones and exhibit phubbing behaviors because previous studies have found that college students turn to social media to fulfill their specific emotional and psychological needs (Wang & Wang, 2013). Secondly, assuming that those with FoMO desire the feelings of connectedness/relatedness with their friends, it would be reasonable to suggest that in order to overcome this FoMO and to satisfy their desire to belong somewhere, people are motivated to go onto social media platforms and as a consequence, end up phubbing others in a social setting (ten Cate, 2013).
This study exhibited a negative connection between the TIPI personality traits and habitual phubbing behavior. More specifically, this study found that among the five traits of TIPI, conscientiousness was most inversely correlated with Phubbing CD and Phubbing TOTAL , which is consistent with evidence from the US (Chotpitayasunondh & Douglas, 2018b). By way of explanation, individuals with poor consciousness or awareness of internal and external existence are by consequence, more likely to have poor discipline, organization, etc. which manifests in communication disturbance and phubbing behaviors in societal settings. Moreover, previous studies which sought to shed light on the implications of the various TIPI traits have revealed that the lack of conscientiousness in an individual may cause problems in regard to communication (Jensen-Campbell & Malcolm, 2007;Juhász, 2010). Conversely, Lee et al. (2019) determined that conscientious individuals are responsible in regard to interpersonal relationships and seek to establish more constructive relationships with others. Given the above-mentioned study findings, it would be expected that conscientiousness would have an inverse relationship with communication disturbance and phubbing behaviors.
On the other hand, this study showed that agreeableness was most inversely correlated with Phubbing PO . This is also in accordance with the assertion in Schermer and Martin's (2019) research that agreeableness is negatively correlated with smartphone use. To explain this apparent relationship between agreeableness (or lack thereof) and phone obsession, this study posits that less agreeable individuals are more isolated in their real-life relations (Panda, 2016) and may seek to compensate for this feeling of loneliness and isolation by turning to smartphone usage. This compensatory smartphone usage would naturally increase the likelihood of phone obsession and phubbing behaviors.
The empirical results of the hierarchical multiple regression analyses of this study further substantiated that the BSMAS holds the most predictive power for Phubbing CD , Phubbing PO , and Phubbing OVERALL , which confirms this study's hypothesis. This should come as no surprise as correlation analysis demonstrated that BSMAS was distinct from the other study variables and that BSMAS was most strongly associated with phubbing behaviors. To put it concisely, this study's analyses point to the role of social media addiction in phubbing behaviors in a social context.
FoMO was shown to be associated with phubbing in the current study, supporting this study's hypothesis. Although significant, FoMO did not possess as much predictive power as BSMAS did on phubbing. The predictive power of FoMO on phubbing, albeit weak, is unsurprising as individuals turn to smartphone/internet use as a coping mechanism to deal with their fears of missing out, and this mechanism may eventually increase the prevalence of phubbing behaviors.
In alignment with this study's hypothesis, TIPI was also shown to be significant in the present study. However, it is worth noting that the addition of the five traits of TIPI did not result in a pronounced increase in the proportion of variance. As communication disturbance, phone obsession, and phubbing behavior concerns online identities, the authors suspect that the TIPI traits or offline identities, might not be accurate representations of online identities (Ellison et al., 2006). If this is indeed true, the discrepancy between offline and online identities may complicate study findings. Future research should consider the role of congruency or incongruency of offline and online identities when determining whether individuals with certain personality traits are more susceptible to phubbing behaviors. Notably, extraversion was most associated with phubbing behavior among the five traits studied. Specifically, students who are less extroverted exhibited higher levels of phubbing behaviors relative to their more extroverted counterparts. In an effort to explain why this inverse relationship exists, the authors posit the following hypotheses. Firstly, introverted individuals, by nature, have a more difficult time befriending others than extroverted individuals. The lack of in-person or offline friends may prompt these individuals to turn to online platforms and mediums to form friendships, which would ultimately contribute to an observed increase in phubbing behavior. Introverted individuals may also be more socially anxious (Ehrenberg et al., 2008) or lack self-confidence (Luyckx et al., 2013) in conventional in-person social settings, which would likewise encourage them to turn to the online alternatives. Interestingly, as evidenced by regression analysis, the sociodemographic variables least influenced phubbing behaviors.

Limitations and Future Research
Several limitations need to be addressed when interpreting study findings. Firstly, sample collection and the study sample itself must be considered. Specifically, Taiwanese university students were utilized as the study sample, which hinders the generalizability of the conclusions drawn from this study. Another limitation to the generalizability of the findings is that a convenience sample was utilized, which indicates that our study sample was not representative of all Taiwanese university students. The self-reported nature of the questionnaires used also places limitations on the validity and reliability of the study findings. Hence, future research should investigate the risk factors of phubbing behaviors using a more representative sample and utilize external measures and multiple assessment tools to improve upon the generalizability and the validity of the conclusions drawn. Subsequent studies may also be conducted using different study samples from different regions to determine whether cultural or regional differences play a role in phubbing behavior. Moreover, the results of this cross-sectional study are unable to inform the cause and effect or the directional nature of the relationships in our study variables. Consequently, future studies should utilize longitudinal research designs to confirm causal relationships between the variables in the current study.
As previously mentioned, future research should also explore the impact, or the lack thereof, of offline/online identity incongruence in determining which individuals are more susceptible to phubbing behaviors.
Finally, future studies are encouraged to investigate more determinants and consequences across different study samples in various social settings. The variables in the present study could only explain 43.8% of phubbing behavior which suggests that the unexplained variance may be attributed to other unidentified variables.
Despite the limitations, this study makes a significant contribution to the existing literature on issues concerning social media addiction, phubbing behaviors, etc. that have become increasingly prominent in modern society. The present study also sheds light on previously unknown relationships among personality traits, the fear of missing out, social media addiction, and phubbing behaviors.

Conclusion
Overall, the present study is the first to conceptualize connections between social media addiction, fear of missing out, personality traits, and phubbing behaviors. In spite of the increasingly prevalent societal and psychological issues brought about by technological advancements in the past century, there exists very little research on the psychosocial factors that precede the problematic usage of technology. Indeed, the conclusions and implications of this work could prove to be critical in determining antecedents to phubbing and in assessing potential risk factors for pathological smartphone use in general.
It is in this regard that the present study seeks to remedy these issues and to provide insight for appropriate interventions to put in place to establish and strengthen interpersonal relationships in an increasingly disconnected world.
Author Contributions LCC and TCT contributed to data collection, data analysis, interpretation, manuscript preparation and editing, ET contributed to the conceptualization and the study design of the study, introduction and conclusion sections of the manuscript.

Data Availability
The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.

Declarations
Ethical Statement All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. All procedures performed were in accordance with the ethical standards of the National Formosa University Ethics Guides. This article does not contain any studies with animals performed by any of the authors.

Informed Consent
Informed consent was obtained from all individual participants included in the study.

Conflict of Interest
The authors declare no conflict of interest.
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