I-PACE	Interaction of Person-Affect-Cognition-Execution
CIUT	Compensatory Internet Use Theory
FoMO	Fear of Missing Out
IAD	Internet Addiction Disorder
IGD	Internet Gaming Disorder
SMA	Social Media Addiction
ICD-11	International Classification of Diseases
MAC	Meaning and Attentional Components model
BFM	The Boredom Feedback Model
BPS	Boredom Proneness Scale
PRISMA	Preferred Reporting Items for Systematic Reviews and Meta-Analyses
PROSPERO	International Prospective Register of Systematic Reviews
NIH	National Institutes of Health
SD	Standard deviation
IAS	Internet Addiction Scale
SELSA	Social and Emotional Loneliness Scale
HADS	Hospital Anxiety and Depression Scale
MCQ-30	Metacognitions Questionnaire 30
IAT	The Internet Addiction Test
SPSRQ	The Sensitivity to Punishment and Sensitivity to Reward Questionnaire
PIU	Problematic Internet Use
ZBS	Boredom Susceptibility Scale
CPGI	The Canadian Problem Gambling Index
DQ	Five-item Dissociation Questionnaire
BIS-SF	Barratt Impulsivity Scale–Short Form
BPS-SF	Boredom Proneness Scale-Short Form
PSU	Problematic Smartphone Use
PMPU	Problematic Mobile Phone Use
PFU	Problematic Use of Facebook
PCI	Pornography Consumption Inventory
PSNSU	Problematic Social Networking Sites Use
PMSMU	Problematic Mobile Social Media Use
ADHD	Hyperactivity Disorder
HSDI	Validation of Hungarian Smartphone Deprivation Inventory
SAS	Smartphone Addiction Scale
SPAI	the Smartphone Addiction Inventory
DASS-21	the Depression Anxiety Stress Scales
PIU-Q	Problem Internet Use Questionnaire
UCLA	Loneliness Self-reporting Scale
DTS	The Distress Tolerance Scale
PDMS	Positive Drinking Expectancy Scale
s-IAT-ICD	Short Internet Addiction Test for Internet-Communication Disorder
IUES	Internet-Use Expectancies Scale
RTSQ	Ruminative thought style questionnaire
HSNS	Hypersensitive Narcissism Scale
BSSS-8	Brief Sensation Seeking Scale
RSES	Rosenberg Self-Esteem Scale
CD-RISC-10	10-item Connor–Davidson Resilience Scale
SSS	Sensation seeking scale
SAS-SV	The 10-item Smartphone Addiction Scale-Short Version
CES-D	Center for Epidemiologic Studies Depression Scale
MPAI	The Mobile Phone Addiction Index
SUF	Smartphone Use Frequency Scale
RRS	Ruminative Responses Scale
UPPS-P	The Short Impulsive Behavior Scale
MTUAS	The Anxiety/Dependence on Technology subscale of the Media and Technology Usage and Attitudes Scale
MAAS	The Mindful Attention Awareness Scale
SCS	Self-control Scale
TAS-20	Toronto Alexithymia-20 Scale
SIAS	Social Interaction Anxiousness Scale
BIS-15	Barratt Impulsiveness Scale-15
MSUQ	Metacognitions about Smartphone Use Questionnaire
SUES	Smartphone Use Expectancies Scale
BFAS	The Bergen Facebook Addiction Scale
MSBS-SF	The Multidimensional State Boredom Scale-Short Form
CSES	Core self-evaluations scale
BPS	Bedtime Procrastination Scale
MPATS	Mobile phone addiction tendency scale
PHQ-9	The Patient Health Questionnaire-9
SIAS	The Social Interaction Anxiety Scale
DIS	The Distress Intolerance Scale
PERS	The Perth Emotional Reactivity Scale-Short Form
MDTQ	Metacognitions about Desire Thinking Questionnaire
DTQ	Desire Thinking Questionnaire
PACS-SNSs	Penn Alcohol Craving Scale
BSMAS	Bergen Social Media Addiction Scale
PMSMUS	Problematic Mobile Social Media Use Scale
Y-BOCS	Yale–Brown obsessive–compulsive scale
HB	High Boredom
LB	Low Boredom
CBT	Cognitive Behavioral Therapy
ADHD	Attention Deficit/Hyperactivity Disorder