Although the developments in technology have made our lives and daily activities easier, it is believed that problematic and excessive use of technology could have some negative effects on people. One of these negative effects is the prevalence of nomophobia, which is considered as a new phobia in recent years. Nomophobia is defined as the fear and anxiety when an individual cannot access his or her mobile/smart phone or cannot have the chance to communicate online and offline via mobile devices. Nomophobic tendencies can change individuals' daily habits. Negative emotions due to nomophobic tendencies like fear and anxiety especially in young people is thought to affect their school lives and academic achievements. The purpose of this research is to analyze the prevalence of nomophobia among high school students regarding various factors. The Nomophobia Scale (NMP-Q), which was used in this study, was developed by Yildirim and Correia (2015), and adapted into Turkish by Yildirim, Sumuer, Adnan and Yildirim (2015). The study group consists of 475 high school students attending six different schools situated in diverse socio-economic areas in Izmir and Edirne in 2015-2016 education year. The study was conducted in survey model and descriptive statistics. T-test for independent samples and one-way analysis of variance (ANOVA) techniques were used at the analysis stage. According to the findings, mean scores obtained from the scale demonstrated that the levels of nomophobic behaviors of high school students were above the average. Besides, female students have higher nomophobia levels compared to male students in terms of gender variable and a significant difference was found in terms of the duration of mobile internet usage. A significant difference could not be found in terms of the variables such as grade, parents' education levels, and the duration of smartphone usage. Furthermore, the study has revealed that high school students use their smartphones and mobile internet largely for social networks, music, communication, photographs, education, research, games and videos.

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The purpose of this study is to investigate the relationship between nomophobia levels of high school students and their Internet Addiction. This study also investigates the factors including duration of smartphone and mobile Internet use that trigger and create this phenomenon. In order to explore the prevalence of nomophobia among high school students, the survey model was adopted in this study. As part of this survey, 929 high school students were randomly selected among 9th to 12th graders from Turkish high schools in different socioeconomic areas of Afyon, Ankara, and Mardin provinces. In the data collection process, a demographics questionnaire was employed, as well as a nomophobia scale and Internet addiction scale. According to the results, the nomophobia levels of high school students were found to be slightly above average. Pertaining to gender differences, female students have a higher tendency to exhibit nomophobic behaviors compared to male students. Additionally, students' grade levels (which could also be considered as age) has no effect on the prevalence of nomophobia. Considering the duration of smartphone ownership, it was found that the longer the duration of smartphone usage, the higher the risk of exhibiting nomophobic behaviors. Finally, the results indicated that the higher the level of student Internet addiction, the more nomophobic behaviors they tend to exhibit.

The aim of this study is to examine high school students and uncover the relationships between Smartphone Addiction levels and certain factors such as (a) Fear of Missing Out (FoMO) (b) Social Networking Site (SNS) usage habits (using smartphones), (c) age, d) sleep duration and (e) duration of smartphone ownership. The study group consists of 161 students from two public high schools in Turkey. Two different scales were employed for data collection; namely, the Smartphone Addiction Scale and FoMO Scale. Based on a cross-sectional research method, this qualitative study makes use of Pearson Correlation and Stepwise Multiple Regression statistical tests. Findings have shown positive correlations interpreted as Smartphone Addiction increasing with greater student age, daily duration of SNS use on smartphones, duration of smartphone ownership, and Fear of Missing Out. In addition, there exists negative-correlation between smartphone addiction and sleep duration, as well as frequency of SNS use on smartphones. Last but not least, it has been shown that FoMO, daily duration of SNSs use on smartphone and duration of smartphone ownership predict smartphone addiction, with the FoMO variable being the strongest predictor.

ÖzBu çalışmada, mobil telefonundan yoksun kalma korkusu olarak bilinen nomofobinin sosyal ağ kullanıcıları arasındaki yaygınlığının çeşitli faktörler açısından incelenmesi amaçlanmıştır. Nedensel karşılaştırma modeli ile betimlenen çalışmanın çalışma grubu, günlük ortalama 5200 aktif kullanıcısı olan çevrimiçi bir sosyal ağ uygulaması aracılığıyla ulaşılan 1151 sosyal ağ kullanıcısından oluşmaktadır. Çalışmada Yıldırım ve Correia (2015) tarafından geliştirilen ve Yıldırım, Şumuer, Adnan ve Yıldırım (2016) tarafından Türkçeye uyarlanmış Nomofobi ölçeği(NMP-Q) ve demografik bilgi formu aracılığıyla toplanan veriler, betimsel istatistikler, bağımsız örneklem t-testi ve tek yönlü varyans analizi(ANOVA) teknikleri ile analiz edilmiştir. Elde edilen bulgulara göre sosyal ağ kullanıcılarının nomofobi düzeylerinin nomofobi ölçeğinden alınan puana göre ortalamanın üzerinde olduğu tespit edilmiştir. Kullanıcıların eğitim durumu ve akıllı telefon kullanma süresi değişkenlerine göre anlamlı bir fark bulunmamış, nomofobi düzeyinin akıllı telefonu kontrol sıklığı, mobil internet kullanma süresi ve günlük mobil internet kullanma süresi değişkenlerine göre anlamlı farklılık taşıdığı görülmüştür. Sonuç olarak, sosyal ağ kullanıcılarının nomofobi düzeyinin, akıllı telefonu kontrol etme sıklığı, mobil internet kullanma süresi ve günlük mobil internet kullanma süresi arttıkça arttığı gözlenmiştir. THE INVESTIGATION OF SOCIAL NETWORK USERS' NOMOPHOBIA LEVELS REGARDING TO VARIOUS FACTORS AbstractIn this study, the fear of being deprived of his mobile phone known as nomophobia among to the prevalence of social network users was examined in terms of various factors. The causalcomparative method was used in this study. This study used data from 1151 online social network users. The Nomophobia Scale (NMP-Q) developed by Yildirim & Correia (2015), and adopted to Turkish by Yildirim, Sumuer, Adnan and Yildirim (2016) was used in this study. Independent sample t-test and one-way analysis of variance (ANOVA) were used to analyze data. Findings indicate that nomophobia levels of the participants are above moderate level, based on average score. There is no significant difference as of education level, duration of mobile phone. However, there is a significant difference among number of daily checking smartphone, duration of mobile internet use, and daily duration of mobile internet use.