Analysis of Problematic Smartphone Use Across Different Age Groups within the ‘Components Model of Addiction’

Smartphones have rapidly become indispensable in modern life. The wide spectrum of activities and virtual interaction possibilities with the mobile device render some individuals prone to exaggerated use exhibiting core symptoms akin to substance addiction. The core common symptoms of addictions can be framed within the ‘components model of addiction.’ Based on the different pattern of smartphone use in various age groups, the symptoms and the risk of smartphone addiction may differ during various life stages. Some age groups may be more at risk of smartphone addiction than others. This hypothesis was tested utilizing data from six surveys comprising 1603 individuals representing various age groups. Results obtained through two recommended age-group analyses both confirmed that preschool children and young adults are at highest risk for smartphone-related addictive behavior. Furthermore, the various components of addiction also differed between the age groups. These results suggest that preventive measures should be primarily targeted to the two most vulnerable age groups represented by preschool children and emerging adults. The results of the present study help identify the dominant addiction symptoms in the various age groups that could pinpoint aspects which should be targeted in implementation of various measures aimed at the prevention of dysfunctional smartphone use.

The research aims of the present study were to address the following questions: (i) do problematic symptoms in the components model (salience, mood modification, tolerance, withdrawal symptoms, conflict, and relapse) show different patterns among age groups and developmental stages? and (ii) are there age groups at greater risk for developing smartphone applicationbased addictions? Furthermore, it was hypothesized that the risk of smartphone application-based addictions would differ between various age groups, with younger people being more affected.

Sample
The study sample and sampling procedures varied across different age groups. The data were collated from six different surveys (of previously published and unpublished data). This multiple-sampling approach resulted in a total of 1651 participants across different age groups who completed the SABAS. After eliminating responses from participants with incomplete data, the final number of participants was 1603 (Fig. 1).
In the kindergarten, a short parental questionnaire was used, involving interviewers to collect children' individual answers. This was a time-consuming procedure and resulted in 75 participants (mean age = 6.01 years, SD = 1.4) (unpublished data). Thus, the total sample included elementary school-aged children sample (n = 258, mean age = 12.4 years, SD = 1.7) (Csibi et al., 2017) and high school student sample (n = 441, mean age = 13.4 years, SD = 2.2), where the data were collected via paper-based scales completion, applied in school classes (Csibi et al. 2016). Adults (n = 589) and older adults (n = 69) were invited to participate in an online study using the Qualtrics software via adverts on different social media. These data stem from three surveys, the first contained 240 respondents (mean age = 25.4 years, SD = 8.1; Csibi et al. 2018), the second 442 respondents (mean age = 28,5, SD = 12.7; Csibi et al. 2019), and the third 147 respondents (mean age = 37.6 years, SD = 13.4; previously unpublished data).

Instruments
Problematic smartphone use was assessed using the (i) Hungarian version of the SABAS (BASS), which is a valid and reliable tool for assessing applications-based problematic Fig. 1 Diagram of age and gender distribution of the sample smartphone use among kindergarten children (under validation), schoolchildren (Csibi et al. 2016), and adults (Csibi et al. 2019) and (ii) English version of the SABAS validated in an international adult population (Csibi et al. 2018). The principal components analysis of the SABAS (BASS) reported a single component for the six items, which accounted for 53% of the total variance in the school children' sample, and 35% of the variance in adults' sample with Hungarian participants. The internal reliability of the scale was good for schoolchildren (Cronbach's alpha = 0.82; Csibi et al. 2016) and for adults (Cronbach's alpha = 0.75; Csibi et al. 2019). The English version of the scale also showed one component, which accounted for 52% of the total variance (Cronbach's alpha 0.81; Csibi et al. 2018).

Procedure
To assess age-group differences, the stage of life classification system was used (Armstrong 2007). This groups individuals into childhood (3-11 years), adolescence (12-19 years), young adulthood (20-34 years), adulthood (35-50 years), and older adulthood (51+ years). However, smartphone use can be determined by the individual's most time-consuming daily activities. Accordingly, the division of age groups can be adapted to specific, everyday activities. Therefore, for a more detailed description of the results, a different, more accurate classification was also used (as recommended by Kail and Cavanaugh 2018). This division is based on the following age grouping: (i) mostly kindergarten, (ii) generally elementary school, (iii) generally high school, (iv) mainly professional or graduate school, (v) early adulthood, (vi) adulthood, and (vii) middle adulthood and above.

Statistical Analysis
A multivariate analysis of variance (MANOVA), on the six components of the SABAS with age and gender being the grouping factors, was used to test the hypothesis. The statistics were performed using Statistical Package for Social Science (SPSS software, version 21 [IBM Inc]).

Results
The problematic smartphone use total score analysis showed a significant effect utilizing Armstrong's age group classification on SABAS total scores (F[4,1597] = 25.179, p < 0.001). According to the more detailed analysis of the age groups, the overall score of those aged 3-11 years was significantly different from those aged 12-19 years and 20-34 years. There were also significant differences between those aged 12-19 years and those aged 20-34 years, as well as differences between those aged 20-34 years and those aged 35-50 years and those over 50 years old (Table 1).
A graphical representation of the findings showed that the 20-34-year age group had the highest score on the problematic smartphone usage scale, followed by those aged 3-11 years and those aged 35-50 years. The lowest scores were for those aged 11-19 years and those over 50 years of age (Fig. 2).
Analysis of the problematic smartphone use-related components showed relevant differences by age group, and covariance with gender (Table 2). There was a significant effect of age groups on all problematic use components (Pillai's trace = 0.297; F(24, 6380) = 21.35, p < 0.001). The analysis was repeated for each factor by age group. Results showed differences for each age group for each factor of problematic smartphone use (Table 3). Table 3 demonstrates that most significant differences were found in the components of mood modification and withdrawal symptoms, where the results of almost all age groups differed significantly. Thus, the group aged 3-11 years had the highest values for salience, mood modification, and tolerance, and the group aged 12-19 years had the highest values for mood modification and tolerance. The highest scores of the 20-34-year age group were for salience, conflict, withdrawal symptoms, and relapse factors. The highest scores of the 35-50year age group were for salience and withdrawal symptoms, whereas it was salience for the over 50 years age group.  Most behaviors develop around an individual's day-to-day activities. These include school time for schoolchildren, courses schedule for university students, and a daily program defined by the workplace for adults. Accordingly, smartphone use may differ within some of those age groups, especially among younger people. Therefore, in addition to Armstrong's age group division, it was necessary to examine in more detail the characteristics of the smartphone usage of the respondents. The results were also examined by another age group (Kail and Cavanaugh 2018), which also considered the typical activities of the given age (Table 4). The problematic smartphone use total score analysis showed a significant effect of Kail and Cavanaugh's age group classification on SABAS total scores (F[61590] = 187.109, p < 0.001) (Fig. 3).
Analysis of the problematic smartphone use-related components showed relevant differences by age group, and covariance with gender (Table 5). There was a significant effect of age groups on all problematic use components (Pillai's trace = .425; F(36, 9570) = 20.24, p < 0.001). Therefore, the analysis was repeated for each factor by age group. Results showed differences for each age group for each factor of problematic smartphone usage (Table 6).
According to the results, data of different age groups utilizing Kail and Cavanaugh's age groups classification, showed significantly different averages. The results for the 3-6-year-olds were significantly different from those of any other age group, especially for the relapse component, while the results of 7-11 year olds were significantly different from those of all other age groups for the tolerance component.

Discussion
Smartphone use is widespread in industrialized societies and discernible across all age groups. Based on the findings of the present study, the extent and characteristics of problematic smartphone use appear to show important differences depending upon age. More specifically, the results of the present study show that problematic use of smartphones is age-dependent, since each age group had significantly different scores on the problematic smartphone use scale. Other research in the field shows that age is a predictor of problematic smartphone use risk, especially in the case of 16-25-year and 26-35-year old groups (de-Sola et al. 2017;Kwon et al. 2017). According to the results, the 20-34-year old age group reported the highest scores on the BASS/SABAS, followed by the 3-11-year olds. Based on two analyses, contrary to expectations, the lowest scores were found among participants aged between 12 and 19 years. The oldest age group exhibited the lowest BASS/SABAS scores from the adult   (2011), older individuals with higher education are more likely to use smartphones. Given the present study did not collect data concerning education level, possible differences in smartphone use between more or less-educated older  Nevertheless, it appears that this older age group relies on smartphone use primarily for maintaining contact with family and friends. Smartphone use for communication purposes does not appear to cause any negative consequences for older adults, suggesting that these individuals are more motivated to maintain good quality social connections (Chan 2018). The findings of the present study also showed that specific addiction components of smartphone usage were more dominant at different age groups. Consequently, smartphone-related addictive components show different patterns for diverse age groups.
The analyses based on Armstrong's age groups showed that the 3-11-year old age group manifested significantly higher salience than the 12-19-year old age group, but lower than the 20-34-year old age group. This latter group showed higher salience than the 12-19, 35-50, and the 50+ year old age groups on this addiction component. In other words, salience was the highest among the 20-34-year old age group, showing that smartphone use is one of the most important activities in their lives. Given that social life, travel, and job-seeking is relatively typical in this age group, the highest level of salience may not necessary reflect addiction, although it clearly shows that this age group is highly dependent on their smartphone (Long et al. 2016). These results    While the conflict component in the 20-34-year old age group was lower than in 3-11 and in 12-19-year old age groups, this component was significantly higher than in the two older age groups. These results may reflect diminishing parental control while showing that partners, employers, and/or friends may confront individuals in this age group when noticing the individual's exaggerated use of their smartphone. These findings are in concordance with the results of other studies reporting that positive parental control can prevent excessive smartphone use (Hwang et al. 2017), while the lack of parental involvement in setting rules for the amount and content of smartphone use may be a risk factor for problematic smartphone use among children (Lian et al. 2016).
Mood modification was the highest in the 3-11 age groups and after that decreased continuously, with significant scores in the following age groups. The lowest average scores were in the group of over 50-year olds. Such results may be attributable to increasing age and the maturation processes, as well as the psychological factors, such as an increased selfcontrol. These results also concur with  who found self-control was negatively correlated with problematic smartphone use .
The level of self-control ability may serve as a possible explanation of why the lower age groups spent increasing amounts of time with their smartphone. The 3-11-year-olds had significantly higher scores for the tolerance component than the 12-19, 20-34, 35-50, and the 50+-year-old respondents, and is in line with other studies who found participants who spent more time on social network sites reported higher addictive tendencies (Wu et al. 2013). At the same time, duration of smartphone use is positively correlated with smartphone addiction (Gökçearslan et al. 2016).
When respondents cannot use their smartphone, they experience negative feelings, leading to withdrawal symptoms and fear of missing out (Eide et al. 2018;Stieger and Lewetz 2018). In the present study, 20-34-year-olds reported this component the most, but the results also showed that withdrawal occurred among the 35-50 and 50+ age groups. Older-age individuals appear to display deeper physical and psychological symptoms associated with withdrawal than the younger age groups. According to other research, in a sample of 18-68-year olds (mean age = 30.96), age was a negative predictor of problematic smartphone use (Mitchell and Hussain 2018).
Relapse showed the highest scores in the 20-34 age group and was significantly lower than in the 35-50 age group. This tendency appeared in the 50+ years age group too. Lower scores were observed in the younger age groups, especially compared to the 3-11-year olds. However, there appears to be no relevant previous research on the relapse component of problematic smartphone use. The analyses based on Kail and Cavanaugh's age group classification showed that the typical activities of the respondents can determine the amount of smartphone use. According to both analyses, the young adult age group reported the highest scores and adolescents the lowest. The preschoolers' (3-6 years) scores on salience was the highest among the age groups within the new analysis, followed by the average scores of 25-34-year and 19-24-year groups. The results of the kindergarten children differed significantly from the 7-11and 12-18-year groups; therefore, the scores of the latter two age groups differed significantly from those of both the younger and older age groups, in terms of salience.
Conflict showed higher scores among 3-6-year-olds, as well as in the 19-24 and 25-34 year groups. According to the results, problematic smartphone use among preschool children is likely to be characterized by conflicts with parents, while in the case of a young adult it may lead to relationship or work conflicts. These findings suggest, in line with other research, that educational or occupational stress can predict problematic smartphone use and dependence (Lopez-Fernandez et al. 2018).
Mood modification showed the same tendency, with younger age groups having the highest scores, with decreasing scores with increasing age. The results of the 7-11-year-olds were significantly different from those aged between 12 and 18 and 19-24 years, who had a decreasing tendency. The lowest average scores were among those aged over 45 years.
The average scores for the 7-11-year olds were the highest for tolerance and decreased with age. Furthermore, it is evident that their scores differed significantly from all other age groups. This age group might have the greatest interest in new information and new tools and comes at a time when their learning ability is supposed to be the highest (Meadows 2017).
According to the results, withdrawal symptoms were the highest among the 19-24-year olds and those aged between 25 and 34 years. The lowest scores were among preschooler where the lack of a smartphone manifests more in mood modification than in withdrawal. The same trend was observed in the relapse component, which shows the highest scores among those aged 19-24 years old and 25-34 years and lowest among the 3-6-year old age group. The scores of those aged 3-6 years were significantly different from the scores of all other age groups.
There are several differences between the results of the two age group classifications. Regarding salience, the Armstrong analysis score (3-11 years = 3.18) was influenced by the high score of the kindergarten age group, compared to the scores of those aged 7-11 years. The results for the next age group (12-19/20 years) were almost the same for both age group classifications. Kail and Cavanaugh distributed Armstrong's third group (20-34 years) into two age bands (19-24 years and 25-34 years), yet the salience scores remained the same. The results of the final two age bands were similar in both distributions. Concerning the conflict component, the second analysis provided significant clarifications because higher scores tended to be among 3-6-year olds, and then decreased significantly. Younger adults (19-24 years) had higher scores than among the 19/20-34-year old. Mood modification in the 3-11-year age group had the highest scores, and the second analysis with the data split did not change the findings. The high scores of the 7-11 age group, compared to the second analysis, caused the high scores of tolerance in the first analysis. The presence of withdrawal symptoms in the 3-6-year-old group were the lowest, and highest among those aged 19-24 years. This decreased among older age groups but remained higher than in any age group between 3 and 19 years. Relapse scores showed a similar distribution across the age groups. Overall, the Kail and Cavanaugh age group classifications were better at detecting age characteristics and the most dominant addiction components by age.

Limitations
The most major limitations in the present study were the use of self-reported data (which are subject to well-known biases) and self-selected samples (so the present findings need replicating with more representative samples). The nature of cross-sectional convenience samples is a common limitation in studies such as this and nothing can be concluded regarding causal factors. Furthermore, some age groups, such as the kindergarten sample, were small which may have influenced the findings.

Conclusion
The SABAS, based on 'components model of addiction', has proven to be a reliable tool to assess problematic smartphone use across different age groups. Problematic smartphone use appears to have specific patterns according to age, with dominance of salience, mood modification and conflict in childhood, and tolerance, withdrawal symptoms, and relapse in adulthood. Some age groups appear to be at greater risk for problematic smartphone use, so prevention should focus on these ages. In addition, targeted prevention can be used to maximum efficiency depending on the characteristics of the age group using information concerning the dominant components of problematic smartphone use at specific age levels.
Funding The study was supported by the Hungarian National Research, Development and Innovation Office (KKP126835).

Compliance with Ethical Standards
Conflict of Interest The authors declare that they do not have any interests that could constitute a real, potential, or apparent conflict of interest with respect to their involvement in the publication. The authors also declare that they do not have any financial or other relations (e.g., directorship, consultancy, or speaker fee) with companies, trade associations, unions, or groups (including civic associations and public interest groups) that may gain or lose financially from the results or conclusions in the study. Sources of funding are acknowledged.
Ethical Approval All procedures performed in this study involving human participants were in accordance with the ethical standards of University's Research Ethics Board and with the 1975 Helsinki Declaration.
Informed Consent Informed consent was obtained from all participants.
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.