Ethics approval and consent to participate
The study protocol received approval from the ethics committee of the School of Pharmacy at the Lebanese International University (2024ERC-026-LIUSOP). An online informed consent was considered obtained from each participant when submitting the form. This project adhered to all pertinent guidelines and regulations (with Helsinki declarations).
Study design and participants
This cross-sectional study took place between March and April 2024. An anonymous online questionnaire was distributed to Lebanese adults nationwide. Eligible participants for the study were required to be citizens of Lebanon, above 18, and willing to participate.Data collection employed snowball sampling and respondent-driven methods. The survey was designed with Google Forms and distributed to potential participants via social media platforms and messaging applications. Study objectives and general instructions were clearly explained before participation.
Translation Procedure
On various scales, the forward and backward translation approach was used. A Lebanese translator who had no connection to the study translated the English version into Arabic. A Lebanese psychologist who speaks English fluently then translated the Arabic text back into English. To find and then fix any discrepancies, the first and second English versions were compared (39).
Questionnaire
The survey was constructed in Arabic, Lebanon’s official language, and divided into three distinct sections. The first part served as an online consent checkpoint to confirm voluntary submission and to address ethical considerations such as confidentiality and response anonymity. This section also included an introduction to the project and instructions for the questionnaire. Part two focused on gathering socio-demographic information from participants such as sex and age. The third section covered various measures detailed below.
Short Boredom Proneness Scale: This scale was developed in 2015 by Struk et al. It is a condensed version of the original Boredom Proneness scale and contains 8 positively endorsed items (e.g. “In most situations, it is hard for me to find something to do or see to keep me interested”). The responses are typically given on a 5-point Likert scale ranging from extremely uncharacteristic of me to extremely characteristic of me. A higher score reflects higher proneness to boredom (27).
Lebanese Anxiety Scale (LAS-10): This scale was developed by Hallit et al. to assess anxiety in the Lebanese population. The scale consists of 10 items, questions 1 to 7 were rated like the visual analogue scale used to assess pain however questions 8 to 10 were scored using a 4-point Likert scale (e.g. “I have insomnia (Difficulty in falling asleep, broken sleep, unsatisfying sleep and fatigue on waking, dreams, nightmares, night terrors”). A higher score indicates higher levels of anxiety (40).
Smartphone Addiction Scale‑Short Version (SAS‑SV): Validated in Lebanon (41), this scale was developed by Kwon et al. to measure the severity of smartphone addiction. The scale consists of 10 items using the 6-point Likert scale ranging from 1 (strongly disagree) to 6 (strongly agree) (e.g. “Having a hard time concentrating in class, while doing assignments, or while working due to smartphone use”.) A higher score indicates a higher degree of smartphone addiction (42).
Jong-Gierveld Loneliness Scale: Validated in Lebanon (43), subjective loneliness was assessed with the modified version of the Jong-Gierveld Loneliness Scale, comprised of 5 items (44) (e.g. “I miss having people around me”). One point is given for a “yes” answer and zero for a “no” answer. Higher scores indicate more loneliness.
Analytic Strategy
Data treatment. There were no missing responses in the dataset. To examine the factor structure of the SBPS, we conducted a Confirmatory Factor Analysisusing the data from the total sample via SPSS AMOS v.29 software. A minimum sample of 160 participants was deemed necessary based on 3 to 20 times the number of the scale’s variables (45). Parameter estimates were obtained using the maximum likelihood method. Calculated fit indices were the normed model chi-square (χ²/df), the Steiger-Lind root mean square error of approximation (RMSEA), the Tucker-Lewis Index (TLI), and the comparative fit index (CFI). Values ≤ 5 for χ²/df, ≤ .05 for SRMR, ≤ .08 for RMSEA, and ≥ .90 for CFI and TLI indicate a good fit of the model to the data (46). Multivariate normality was not verified at first (Critical ratio >5; Bollen-Stine p = .008); therefore, we performed a non-parametric bootstrapping procedure.
Sex invariance. To examine the sex invariance of SBPS scores, we conducted a multi-group CFA (47) using the total sample. Measurement invariance was assessed at the configural, metric, and scalar levels (48). We accepted ΔCFI ≤ .010 and ΔRMSEA ≤ .015 or ΔSRMR ≤ .010 as evidence of invariance (47). Comparison between males and females was done using the Student t-test only if scalar or partial scalar invariance.
Composite reliability in both subsamples was assessed using McDonald’s ω and Cronbach’s alpha, with values greater than .70 reflecting adequate composite reliability. The normality of the SBPS score was verified since the skewness and kurtosis values for each item of the scale varied between -1 and +1 (49). To assess concurrent validity, the Pearson test was used to correlate scores.