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1.
Behav Cogn Psychother ; : 1-15, 2024 Sep 11.
Article in English | MEDLINE | ID: mdl-39257351

ABSTRACT

BACKGROUND: Obsessive-compulsive disorder (OCD) symptoms are hypothesized to be driven by two core motivations: harm avoidance and incompleteness. While cognitive-behavioural therapy (CBT) is an effective treatment for OCD, many posit that OCD presentations characterized by high incompleteness may be harder to treat. The relationship between the core motivations and treatment outcomes remains to be further explored. AIMS: To investigate if harm avoidance and incompleteness decrease across group CBT and to examine the relationship between treatment outcomes and both baseline and changes in harm avoidance and incompleteness throughout treatment. METHOD: A naturalistic sample of 65 adult out-patients with OCD completed self-report questionnaires measuring OCD symptom severity and the core motivations before, during, and after 12 weeks of group CBT for OCD. RESULTS: Harm avoidance and incompleteness scores significantly decreased from pre- to post-treatment. Pre-treatment harm avoidance and incompleteness levels did not predict post-treatment symptom severity, but changes in the core motivations throughout treatment were significant predictors of treatment outcome. Specifically, reductions in harm avoidance across treatment and reductions in incompleteness early in treatment, were associated with better treatment outcomes. CONCLUSIONS: Participants who completed group CBT for OCD experienced modest reductions in the core motivations thought to maintain OCD symptoms and these changes predicted better outcomes. However, pre-treatment levels of harm avoidance and incompleteness do not appear to moderate treatment outcome.

2.
J Psychopathol Behav Assess ; 46(1): 12-24, 2024 Mar.
Article in English | MEDLINE | ID: mdl-39219837

ABSTRACT

Although psychological symptoms are broadly considered to be risk factors for substance use, internalizing symptoms may be associated with lower risk for adolescent substance use after controlling for co-occurring externalizing symptoms. The present study explored two potential mediators of this protective association between internalizing symptoms and adolescent substance use: popularity and harm avoidance. The study used data from the Colorado Longitudinal Twin Study (LTS) and Colorado Adoption Project (CAP). Annual assessments of internalizing and externalizing symptoms and social competence were completed by parents and teachers at participant ages 7 to 16. Harm avoidance and substance use were assessed at age 17. In this sample, internalizing symptoms were associated with less frequent substance use, controlling for externalizing symptoms. We did not find evidence that popularity or harm avoidance accounts for the protective association of internalizing symptoms with adolescent substance use. Teacher-reported popularity was associated with less frequent substance use, suggesting that social connectedness in the school context may be a protective factor for adolescent substance use. Harm avoidance was not associated with substance use after accounting for internalizing and externalizing symptoms.

3.
Eur Eat Disord Rev ; 32(5): 930-942, 2024 Sep.
Article in English | MEDLINE | ID: mdl-38722045

ABSTRACT

OBJECTIVE: Eating disorders (ED) have recently been studied from a network approach, conceptualising them as a complex system of interconnected variables, while highlighting the role of non-ED symptoms and personality dimensions. This study aims to explore the connections between personality and ED symptoms, identify central nodes, and compare the EDs network to a healthy control network. METHODS: We employed network analysis to examine the personality-ED symptom connections in 329 individuals with an ED diagnosis and 192 healthy controls. We estimated a regularised partial correlation network and the indices of centrality and bridge centrality to identify the most influential nodes for each group. Network differences between groups were also examined. RESULTS: Low Self-Directedness and high Harm avoidance emerged as central bridge nodes, displaying the strongest relationship with ED symptoms. Both networks differed in their global connectivity and structure, although no differences were found in bridge centrality and centrality indices. CONCLUSIONS: These findings shed light on the role of personality dimensions, such as Self-Directedness and Harm Avoidance in the maintenance of ED psychopathology, supporting the transdiagnostic conceptualisation of ED. This study advances a deeper understanding of the complex interplay between personality dimensions and ED symptoms, offering potential directions for clinical interventions.


Subject(s)
Feeding and Eating Disorders , Personality , Humans , Feeding and Eating Disorders/psychology , Female , Personality/physiology , Adult , Male , Young Adult , Adolescent , Case-Control Studies
4.
Biol Psychiatry ; 96(2): 137-146, 2024 Jul 15.
Article in English | MEDLINE | ID: mdl-38336216

ABSTRACT

BACKGROUND: Individuals with obsessive-compulsive disorder (OCD) show persistent avoidance behaviors, often in the absence of actual threat. Quality-of-life costs and heterogeneity support the need for novel brain-behavior intervention targets. Informed by mechanistic and anatomical studies of persistent avoidance in rodents and nonhuman primates, our goal was to test whether connections within a hypothesized persistent avoidance-related network predicted OCD-related harm avoidance (HA), a trait measure of persistent avoidance. We hypothesized that 1) HA, not an OCD diagnosis, would be associated with altered endogenous connectivity in at least one connection in the network; 2) HA-specific findings would be robust to comorbid symptoms; and 3) reliable findings would replicate in a holdout testing subsample. METHODS: Using resting-state functional connectivity magnetic resonance imaging, cross-validated elastic net for feature selection, and Poisson generalized linear models, we tested which connections significantly predicted HA in our training subsample (n = 73; 71.8% female; healthy control group n = 36, OCD group n = 37); robustness to comorbidities; and replicability in a testing subsample (n = 30; 56.7% female; healthy control group n = 15, OCD group n = 15). RESULTS: Stronger inverse connectivity between the right dorsal anterior cingulate cortex and right basolateral amygdala and stronger positive connectivity between the right ventral anterior insula and left ventral striatum were associated with greater HA across groups. Network connections did not discriminate OCD diagnostic status or predict HA-correlated traits, suggesting sensitivity to trait HA. The dorsal anterior cingulate cortex-basolateral amygdala relationship was robust to controlling for comorbidities and medication in individuals with OCD and was also predictive of HA in our testing subsample. CONCLUSIONS: Stronger inverse dorsal anterior cingulate cortex-basolateral amygdala connectivity was robustly and reliably associated with HA across groups and in OCD. Results support the relevance of a cross-species persistent avoidance-related network to OCD, with implications for precision-based approaches and treatment.


Subject(s)
Magnetic Resonance Imaging , Obsessive-Compulsive Disorder , Obsessive-Compulsive Disorder/physiopathology , Obsessive-Compulsive Disorder/diagnostic imaging , Humans , Male , Female , Adult , Neural Pathways/physiopathology , Neural Pathways/diagnostic imaging , Brain/diagnostic imaging , Brain/physiopathology , Young Adult , Avoidance Learning/physiology , Harm Reduction
5.
Turk Psikiyatri Derg ; 34(3): 162-172, 2023.
Article in English, Turkish | MEDLINE | ID: mdl-37724642

ABSTRACT

OBJECTIVES: Personality traits and early maladaptive schemas (EMSs) play an active role in the emergence, maintenance, and treatment of depressive mood. Studies draw attention to the close relationship between temperament and character traits, EMSs, and depression. The first aim of this study is to examine the relationships between temperament, character traits, and EMSs. Secondly, we were interested to observe whether or not these variables explained depressive symptoms. Lastly, based on the previous findings and the idea that the development of EMSs is affected by temperament traits, the mediating role of EMSs in the relationship between harm avoidance and depressive symptoms was investigated. METHOD: Personal Information Form, Temperament and Character Inventory, Young Schema Questionnaire Short Form-3, and Beck Depression Inventory were applied to 205 undergraduate students (68% women). RESULTS: Results showed the significant correlations among harm avoidance temperament trait, self-directedness, cooperativeness character traits, and with most of the EMSs. The disconnection schema domain, harm avoidance, and self-directedness personality traits predicted depressive symptoms. Moreover, controlling the gender effect, disconnection and unrelenting standards mediated the relationship between harm avoidance and depressive symptoms. CONCLUSION: The findings supported the idea suggested by the schema theory that the temperament traits affect EMSs. We believe that these findings can support studies towards depression-prevention as well as the treatment of depressive individuals. Even without interfering with temperament characteristics of individuals, depressive symptoms might be reduced by working only with some of the EMSs.


Subject(s)
Depression , Temperament , Humans , Female , Male , Phenotype , Psychiatric Status Rating Scales , Students
6.
Curr Biol ; 33(20): 4330-4342.e5, 2023 10 23.
Article in English | MEDLINE | ID: mdl-37734375

ABSTRACT

Many species living in groups can perform prosocial behaviors via voluntarily helping others with or without benefits for themselves. To provide a better understanding of the neural basis of such prosocial behaviors, we adapted a preference lever-switching task in which mice can prevent harm to others by switching from using a lever that causes shocks to a conspecific one that does not. We found the harm avoidance behavior was mediated by self-experience and visual and social contact but not by gender or familiarity. By combining single-unit recordings and analysis of neural trajectory decoding, we demonstrated the dynamics of anterior cingulate cortex (ACC) neural activity changes synchronously with the harm avoidance performance of mice. In addition, ACC neurons projected to the mediodorsal thalamus (MDL) to modulate the harm avoidance behavior. Optogenetic activation of the ACC-MDL circuit during non-preferred lever pressing (nPLP) and inhibition of this circuit during preferred lever pressing (PLP) both resulted in the loss of harm avoidance ability. This study revealed the ACC-MDL circuit modulates prosocial behavior to avoid harm to conspecifics and may shed light on the treatment of neuropsychiatric disorders with dysfunction of prosocial behavior.


Subject(s)
Gyrus Cinguli , Helping Behavior , Mice , Animals , Gyrus Cinguli/physiology , Thalamus/physiology , Neurons/physiology
7.
J Sleep Res ; : e13972, 2023 Jun 21.
Article in English | MEDLINE | ID: mdl-37345305

ABSTRACT

Research indicated that patients suffering from nightmares are often undertreated. One reason for this gap is that nightmare sufferers themselves often have not sought professional help for their nightmares, and-if they did-it was not very helpful. The current study aimed at studying trait factors (personality, harm avoidance) in relation to the persons considering seeking professional help. In a population-sample of 1108 persons (712 women, 396 men) with a mean age of 50.55 ± 14.22 years, it was also found that only some of the persons who have problems with nightmares even considered seeking professional help as an option. As expected and after controlling for effects of nightmare frequency, persons with high harm avoidance and high introversion were more likely not seeking help for their problems with nightmares. The associations with low education, low agreeableness and low conscientiousness with considering seeking professional help might point to the fear of stigmatisation in nightmare sufferers. Interestingly, the association between harm avoidance and "Considering seeking professional help" was even stronger in the subsample of frequent nightmare sufferers (once a week or more often). Future efforts should aim at findings new ways to offer adequate help for nightmares and increase the knowledge about nightmare treatment in healthcare professionals.

8.
Psychol Sci ; 34(7): 834-848, 2023 Jul.
Article in English | MEDLINE | ID: mdl-37260038

ABSTRACT

Two preregistered studies from two different platforms with representative U.S. adult samples (N = 1,865) tested the harm-hypervigilance hypothesis in risk assessments of controversial behavioral science. As expected, across six sets of scientific findings, people consistently overestimated others' harmful reactions (medium to large average effect sizes) and underestimated helpful ones, even when incentivized for accuracy. Additional analyses found that (a) harm overestimations were associated with support for censoring science, (b) people who were more offended by scientific findings reported greater difficulty understanding them, and (c) evidence was moderately consistent for an association between more conservative ideology and harm overestimations. These findings are particularly relevant because journals have begun evaluating potential downstream harms of scientific findings. We discuss implications of our work and invite scholars to develop rigorous tests of (a) the social pressures that lead science astray and (b) the actual costs and benefits of publishing or not publishing potentially controversial conclusions.


Subject(s)
Behavioral Sciences , Censorship, Research , Adult , Humans , Anxiety , United States , Risk Assessment , Knowledge
9.
Clin Psychopharmacol Neurosci ; 21(1): 99-107, 2023 Feb 28.
Article in English | MEDLINE | ID: mdl-36700316

ABSTRACT

Objective: Hypoactivity in the reward system among patients with attention deficit hyperactivity disorder (ADHD) is a well-known phenomenon. Whether the activity in the reward pathway is related to harm avoidance, such as in sensitivity to punishment, is unclear. Evidence regarding the potential difference between ADHD patients and controls in terms of this association is scarce. Methods: Event-related functional magnetic resonance imaging was conducted on subjects performing the Iowa gambling test. Fourteen adults with ADHD and 14 controls were enrolled in the study. Results: Harm avoidance was found to be positively correlated with the activities of the bilateral orbitofrontal cortex and right insula in individuals with ADHD. A group difference was also confirmed. Conclusion: Understanding the roles of harm avoidance and brain activation during risk tasks is important.

10.
Percept Mot Skills ; 130(2): 790-807, 2023 Apr.
Article in English | MEDLINE | ID: mdl-36720673

ABSTRACT

High scores on Harm Avoidance (HA) on Cloniger's Temperament and Character Inventory (TCI) have been identified as a risk factor for depression. Group cognitive-behavioral therapy (GCBT) has been found effective in preventing depression and improving depressive symptoms among university students. However, no randomized controlled trials of GCBT have been conducted with university students with high HA. Although we initiated a randomized controlled trial in this study, some participants submitted incomplete questionnaires at baseline interfering with assured randomization; therefore, we report this study as a non-randomized controlled trial. We evaluated whether a GCBT intervention would be effective at reducing HA and, thereby, preventing depression in university students with high HA. We performed final analysis of data on 59 participants in the intervention group and 60 in a control group. We used scores on the Beck Depression Inventory-II (BDI-II) as the primary outcome measure and analysis of covariance to assess group differences on mean BDI-II change scores before the intervention and at six months and one year after the intervention. The intervention group had lower BDI-II scores than the control group at six months after the intervention. GCBT may have facilitated cognitive modification in individuals with high HA, or GCBT may have fostered mutual modeling by group participants. Thus, GCBT may contribute to reducing depressive symptoms in university students with high HA, and associated risk for developing depression.


Subject(s)
Cognitive Behavioral Therapy , Depression , Humans , Depression/prevention & control , Universities , Temperament , Students/psychology
11.
Brain Sci ; 12(12)2022 Nov 29.
Article in English | MEDLINE | ID: mdl-36552091

ABSTRACT

Multiple studies support the relationship between ADHD and overweight/obesity in youth. Different mechanisms may be involved, such as temperamental and psychopathological factors. The aim of this study was to test the hypothesis that specific temperamental and psychopathological dimensions could mediate the relationship between ADHD and obesity. The sample included 100 children and adolescents (78 males and 22 females; age range 6 to 18 years; mean age 9.90 ± 2.5 years). The assessment procedure included Conners' Parent Rating Scale-Long (CPRS-R:L) as the inclusion criterion for ADHD diagnosis, the Child Behavior Checklist (CBCL), a dimensional measure for psychopathology, and the Junior Temperament and Character Inventory, which describes four temperamental dimensions: novelty seeking (NS), harm avoidance (HA), reward dependence (RD), and persistence (P). While in the whole ADHD sample, the highest scores were found in NS and the lowest in P, ADHD with overweight/obesity, compared to ADHD with normal weight, showed higher HA and RD, lower NS, and higher CBCL Internalizing scores. These findings suggest that ADHD youth with overweight/obesity present specific temperamental and psychopathological features compared to those without overweight/obesity. If confirmed in larger samples, using a control group without ADHD, these temperamental and psychological features may be helpful for an earlier recognition of ADHD patients at higher risk for obesity, and may represent possible targets for temperament-based preventive interventions and tailored treatment programs. These features should be included in the routine assessment of children and adolescents with ADHD and/or are overweight/obese.

12.
BMC Psychiatry ; 22(1): 832, 2022 12 27.
Article in English | MEDLINE | ID: mdl-36575407

ABSTRACT

BACKGROUND: Up to now several subtypes of social anxiety disorder (SAD) have been proposed. METHODS: In the present study, we used a cluster analytic approach to identify qualitatively different subgroups of SAD based on temperament characteristics, that is, harm avoidance (HA) and novelty seeking (NS) dimensions of Cloninger's Temperament and Character Inventory. RESULTS: Based on a large, diverse clinical sample (n = 575), we found evidence for two distinct subgroups of SAD: a larger (59%) prototypic, inhibited cluster characterized by high HA and low NS, and a smaller atypic, and comparatively more impulsive cluster characterized by medium to high HA and increased NS. The subgroups differed regarding a variety of sociodemographic and clinical variables. While the prototypic SAD subtype suffered from more severe SAD and depressive symptoms, suicidal ideation, and reduced social functioning, the atypic NS subtype showcased higher reproductive behaviour, self-directedness and -transcendence, comparatively. Additional hierarchical logistic regression highlights the contribution of age and education. CONCLUSIONS: Our results valuably extend previous evidence for the existence of at least two distinct subtypes of SAD. A better knowledge of the characteristic differences in prototypic behaviour, personality, coping strategies and comorbidities between the identified (and further) subtypes can contribute to the development of effective prevention interventions and promotes the conceptualization of tailored treatments.


Subject(s)
Phobia, Social , Adult , Humans , Exploratory Behavior , Personality , Personality Disorders/diagnosis , Temperament , Character , Personality Inventory
13.
Psychiatry Investig ; 19(11): 949-957, 2022 Nov.
Article in English | MEDLINE | ID: mdl-36444158

ABSTRACT

OBJECTIVE: Pre-treatment anxiety (PA) before chemotherapy increases complaints of chemotherapy-related symptoms (CRS). The results on the association have been inconsistent, and the effect of temperament remains unclear. We aimed to determine whether PA is a risk factor for CRS and the effect of differing temperaments on CRS. METHODS: This prospective study comprised 176 breast cancer patients awaiting adjuvant chemotherapy post-surgery. We assessed CRS, PA, and temperament using the MD Anderson Symptom Inventory (MDASI), the Hospital Anxiety and Depression Scale, and the short form of the Temperament and Character Inventory-Revised, respectively. The MDASI was re-administered three weeks after the first chemo-cycle. RESULTS: PA showed weak positive correlation with several CRS after the first cycle; no CRS was significantly associated with PA when pre-treatment depressive symptoms and baseline CRS were adjusted in multiple regression analysis. Moderation model analysis indicated that the PA effect on several CRS, including pain, insomnia, anorexia, dry mouth, and vomiting, was moderated by harm avoidance (HA) but not by other temperament dimensions. In particular, PA was positively associated with CRS in patients with low HA. CONCLUSION: The results in patients with low HA indicate that more attention to PA in patients with confident and optimistic temperaments is necessary.

14.
Front Psychiatry ; 13: 962189, 2022.
Article in English | MEDLINE | ID: mdl-36186857

ABSTRACT

Objective: Temperament is close to susceptibility to stress and the increased level of stress may lead problematic smartphone use (PSU). In this study, the relationships between harm avoidance (HA) as a personality trait, daily traits, and PSU in children and adolescents were investigated. Methods: At baseline, all participants (184 children and adolescents, mean age 13.15 years) completed questionnaires on PSU using the Smartphone Addiction Scale-Short Version (SAS-SV) and the Korean Smartphone Addiction Proneness Scale (SAPS). The Daily Hassles Questionnaire (DHQ) and Junior Temperament and Character Inventory (JTCI) were also administered to evaluate stress levels and personality traits. SAS-SV, SAPS, and DHQ were reassessed at 3 and 6 months. Results: Among JTCI temperament, HA displayed robust positive correlations with SAS-SV, SAPS, and DHQ at all time points. Mediation effects of daily stress on the relationship between HA and PSU were observed at baseline, 3, and 6 months. Conclusion: The findings suggest that managing stress may important in PSU children and adolescents with high HA.

15.
Neurosci Biobehav Rev ; 142: 104878, 2022 11.
Article in English | MEDLINE | ID: mdl-36116575

ABSTRACT

We examine fear and anxiety in the context of structural models of personality (the five-factor model, or FFM) and psychopathology (the Hierarchical Taxonomy of Psychopathology, or HiTOP); we also highlight important issues related to their assessment. Anxiety is a sustained, future-oriented response to potential threat. Trait measures of anxiety represent a core facet within the broader domain of neuroticism in the FFM. Anxiety-related symptoms are indicators of the distress subfactor within the internalizing spectrum in HiTOP. In contrast, fear is a brief, present-focused response to an acute threat. We distinguish between two ways of assessing individual differences in fear. The first type assesses phobic responses to specific stimuli. Phobia measures are moderately correlated with measures of neuroticism in the FFM and define the fear subfactor of internalizing in HiTOP. The second type assesses individual differences in harm avoidance versus risk taking. Measures of risk taking (i.e., low fear) are moderately related to disinhibition/low conscientiousness and antagonism/low agreeableness in the FFM and are indicators of the externalizing superspectrum in HiTOP.


Subject(s)
Anxiety Disorders , Personality , Humans , Personality/physiology , Neuroticism , Fear , Anxiety , Psychopathology
16.
Front Psychol ; 13: 863523, 2022.
Article in English | MEDLINE | ID: mdl-35651571

ABSTRACT

Bedtime procrastination (BP) is generally considered to be a maladaptive behavior. However, BP may be an adaptive fast LH strategy within the LH framework, and further, personal beliefs about their abilities and resources promote this fast LH strategy. Here, the present study addressed this idea, focusing on the effect of self-efficacy on BP, the mediation of harm avoidance (HA), and the moderation of novelty seeking (NS). Data from 552 Chinese university students (205 men and 347 women) were analyzed using SPSS 25.0 and SPSS PROCESS Macro. Results indicated that HA partially mediates the relationship between self-efficacy and BP. Main interactional effects have been observed when NS is introduced in the model as a moderator. Implications and limitations of the study and suggestions for further study are discussed.

17.
Arch Womens Ment Health ; 25(4): 693-703, 2022 08.
Article in English | MEDLINE | ID: mdl-35732898

ABSTRACT

The aim of our study was to examine whether there are sex-based differences in the relationship between personality traits and hypothalamic-pituitary-adrenal (HPA) axis measures. A total of 106 healthy volunteers (56.6% women; age: 48.0 ± 15.8 years) were studied. The revised temperament and character inventory (TCI-R) and the Childhood Trauma Questionnaire (CTQ) were administered. HPA axis function was assessed using three dynamic measures: the cortisol awakening response (CAR), the diurnal cortisol slope, and the cortisol suppression ratio with 0.25 mg of dexamethasone (DSTR). Female sex was associated with an increased CAR and a more flattened diurnal cortisol slope, although a negative significant interaction between harm avoidance and female sex was found. Regarding the DSTR, perseverance was associated with increased cortisol suppression after dexamethasone; sex did not affect this association. Our study suggests that the relationship between specific personality traits (harm avoidance) and HPA axis measures (CAR, diurnal slope) differs according to sex.


Subject(s)
Hypothalamo-Hypophyseal System , Pituitary-Adrenal System , Adult , Dexamethasone , Female , Humans , Hydrocortisone , Male , Middle Aged , Personality , Saliva
19.
Eur Eat Disord Rev ; 30(4): 388-400, 2022 07.
Article in English | MEDLINE | ID: mdl-35368118

ABSTRACT

OBJECTIVE: Although personality traits have been found to be associated with body dissatisfaction for women in the general population, little research has explored these associations for people with eating disorders. Furthermore, it is unknown whether these associations are direct or are mediated by other factors. In this cross-sectional study, secondary analyses of data from two clinical trials were conducted to determine which personality dimensions contributed to body dissatisfaction in women with bulimia nervosa, and whether low self-esteem and depression mediate these associations independently or in serial. METHOD: Participants were 193 women with bulimia nervosa. Participants completed self-report measures of temperament and character, body dissatisfaction, low self-esteem, and depression before receiving treatment for their eating disorder. RESULTS: The temperament dimension, harm avoidance, contributed significantly to body dissatisfaction. Serial mediation analyses showed this association was fully mediated, revealing two significant indirect effects. The first was through low self-esteem and the second through depression and low self-esteem in serial. CONCLUSIONS: Findings suggest body dissatisfaction in women with bulimia nervosa may be indirectly targeted through addressing harm avoidance, depression and low self-esteem.


Subject(s)
Body Dissatisfaction , Bulimia Nervosa , Cross-Sectional Studies , Depression , Female , Humans , Temperament
20.
Hum Brain Mapp ; 43(10): 3176-3183, 2022 07.
Article in English | MEDLINE | ID: mdl-35332975

ABSTRACT

As the previous studies have mainly focused on the reward system and the corresponding brain regions, the relationship between brain morphology and excessive internet use (EIU) were not clear; the purpose of the study was to investigate if the brain regions other than the reward system were associated with EIU. Data were acquired from 131 excessive internet users. Psychological measures included internet use, life quality, personality, mental illness symptoms, impulsivity, and thought suppression. The brain was scanned with 3T magnetic resonance imaging (MRI) and six types of brain morphological indexes were calculated. Lasso regression methods were used to select the predictors. Stepwise linear regression methods were used to build the models and verify the model. The variables remaining in the model were left precentral (curve), left superior temporal (surface area), right cuneus (folding index), right rostral anterior cingulate (folding index), and harm avoidance. The independent variable was the EIU score of the worst week in the past year. The study found that the brain morphological indexes other than the reward system, including the left precentral (curve), the left superior temporal (surface area), the right cuneus (folding index), and the right rostral anterior cingulate (folding index), can predict the severity of EIU, suggesting an extensive change in the brain. In this study, a whole-brain data analysis was conducted and it was concluded that the changes in certain brain regions were more predictive than the reward system and psychological measures or more important for EIU.


Subject(s)
Internet Use , Magnetic Resonance Imaging , Brain/diagnostic imaging , Humans , Impulsive Behavior , Internet , Magnetic Resonance Imaging/methods , Reward
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