Impulsive Personality Traits Research Articles

Relations among motives, negative urgency, and mindfulness skills in college drinkers

Heavy alcohol use continues to be a common problem among the college student population, and numerous negative consequences can be attributed to student drinking. Several factors, including drinking motives and impulsivity, have been studied to better understand college drinking behaviors. Research has identified that coping motives (i.e., drinking to reduce negative affect) and negative urgency (i.e., the tendency for rash reaction in response to negative affect) are both closely linked to alcohol-related problems and to one another. The primary purpose of this study was to test if mindfulness skills moderate the relation between negative urgency and drinking to cope. To test for moderation, 683 college student drinkers responded to self-report measures of drinking behaviors, drinking motives, impulsivity, and daily utilization of mindfulness skills. Four separate regression models tested for the mindfulness skills of observing, describing, acting with awareness, and accepting without judgment as potential moderators to the relation between negative urgency and coping motives. The mindfulness skill of accepting without judgment significantly moderated (i.e., dampened) the positive relation between negative urgency and drinking to cope. Results may be useful in developing targeted intervention and prevention efforts to test among students, as skills training may benefit individuals with long-standing impulsive personality traits who engage in the traditionally problematic behavior of drinking to cope.

Association of Corticotropin-Releasing Hormone Receptor-1 Gene Polymorphisms and Personality Traits with Violent Aggression in Male Adolescents.

There is evidence that corticotropin-releasing hormone receptor 1 (CRHR1) gene polymorphisms and indifferent impulsive personality traits play an important role in violent aggression in male adolescents. Genotyping for two tag single-nucleotide polymorphisms (SNP) (rs242924, rs17689966) was conducted using TaqMan SNP for 138 violent young male criminals, 98 nonviolent young male criminals, and 153 noncriminal adults. The general situation and personality traits (SSP) questionnaire was given to the young violent and nonviolent male criminal groups. The results showed that the frequency of the G allele in rs242924 of the CRHR1 gene in the violent aggression group was higher than that in the normal adult controls (P < 0.025, OR = 2.29, 95% CI = 1.13-4.62). The difference in genotype distribution was significant among the three groups (P < 0.05), and when the violent group was compared with the two control groups, no significant difference was found (P > 0.025). The impulsiveness, trait irritability, verbal trait aggression, and physical trait aggression scores in the violent group were significantly higher than those in the nonviolent group of adolescents. These findings suggest that the variance in CRHR1 gene polymorphisms and personality traits may play a role in violent aggression in male adolescents, and that the interaction of the CRHR1 gene and the impulsive personality trait may cause an increased susceptibility to violence towards others.

Fractionation of impulsive and compulsive trans-diagnostic phenotypes and their longitudinal associations.

Objective:Young adulthood is a crucial neurodevelopmental period during which impulsive and compulsive problem behaviours commonly emerge. While traditionally considered diametrically opposed, impulsive and compulsive symptoms tend to co-occur. The objectives of this study were as follows: (a) to identify the optimal trans-diagnostic structural framework for measuring impulsive and compulsive problem behaviours, and (b) to use this optimal framework to identify common/distinct antecedents of these latent phenotypes.Method:In total, 654 young adults were recruited as part of the Neuroscience in Psychiatry Network, a population-based cohort in the United Kingdom. The optimal trans-diagnostic structural model capturing 33 types of impulsive and compulsive problem behaviours was identified. Baseline predictors of subsequent impulsive and compulsive trans-diagnostic phenotypes were characterised, along with cross-sectional associations, using partial least squares.Results:Current problem behaviours were optimally explained by a bi-factor model, which yielded dissociable measures of impulsivity and compulsivity, as well as a general disinhibition factor. Impulsive problem behaviours were significantly explained by prior antisocial and impulsive personality traits, male gender, general distress, perceived dysfunctional parenting and teasing/arguments within friendships. Compulsive problem behaviours were significantly explained by prior compulsive traits and female gender.Conclusion:This study demonstrates that trans-diagnostic phenotypes of 33 impulsive and compulsive problem behaviours are identifiable in young adults, utilising a bi-factor model based on responses to a single questionnaire. Furthermore, these phenotypes have different antecedents. The findings yield a new framework for fractionating impulsivity and compulsivity, and suggest different early intervention targets to avert emergence of problem behaviours. This framework may be useful for future biological and clinical dissection of impulsivity and compulsivity.

The Influence of Impulsive Personality Traits and Store Environment on Impulse Buying of Consumer in Karachi

This study was aimed to understand and assess the role of store environment, impulsive buying personality traits, impulsive buying tendency, and urge to buy on impulsive buying. Data was collected from 250 respondents and analyzed using Structural Equation Modeling technique, findings suggested that impulse buying was positively associated with impulse buying tendency, impulsively personality trait and urge to buy. The most important finding of the study is the insignificant effect of store environment on consumers that are instinctive buyers. The study also suggests that impulsive traits of the consumer directly lead to impulse buying. It actually don’t need some drive such as store environment that would stimulate their impulse buying tendency. However, this study didn’t find any effect of demographic variables (gender and income) on impulse buying tendency. The overall store environment has insignificant effect on consumer impulse purchase but different attributes such as cleanliness and arrangement of product has relative impact on impulse buying that’s why the retailers should focus on store environment elements such as crowd, sales employee, entertainment, lighting, aroma and display etc. to stimulate impulse buying. This study confirmed the role of personality in encouraging impulse buying at retail outlets. Marketers should identify ways to reach out open ended and extrovert people to target their promotional offers.

UPPS-P impulsive personality traits and adolescent cigarette smoking: A meta-analysis

BackgroundAdolescence is a critical developmental period in the trajectory of nicotine dependence, highlighting the need for a greater understanding of the modifiable risk factors. An extensive body of research has found that trait impulsivity is associated with higher levels of adolescent smoking; however, findings have been mixed. The present study aimed to synthesise existing literature to determine the strength and nature of the relationship between the UPPS-P impulsive traits and both adolescent cigarette consumption and nicotine dependence. MethodsFifty-one studies were meta-analysed using a random effects model to determine the association between each UPPS-P impulsive trait and both adolescent cigarette consumption and nicotine dependence. Age, gender, ethnicity and sample type were examined as potential moderators. ResultsCigarette consumption was positively associated with each UPPS-P impulsive trait (r’s ranging from 0.17-0.20). There were an insufficient number of studies to meta-analyse the association between nicotine dependence and the UPPS-P impulsive traits. There were no significant moderation effects of age, gender, ethnicity or sample type. ConclusionsFindings suggest that each UPPS-P impulsive trait shares similar associations with adolescent cigarette consumption. Additional studies are needed to determine the relationship between adolescent nicotine dependence and impulsivity. As most adult smokers initiate during adolescence, targeting these impulsive traits via novel prevention and intervention strategies may assist in reducing the prevalence of smoking.

Genome-Wide Association Studies of Impulsive Personality Traits (BIS-11 and UPPS-P) and Drug Experimentation in up to 22,861 Adult Research Participants Identify Loci in the CACNA1I and CADM2 genes.

Impulsive personality traits are complex heritable traits that are governed by frontal-subcortical circuits and are associated with numerous neuropsychiatric disorders, particularly drug abuse and attention-deficit/hyperactivity disorder (ADHD). In collaboration with the genetics company 23andMe, we performed 10 genome-wide association studies on measures of impulsive personality traits [the short version of the UPPS-P Impulsive Behavior Scale, and the Barratt Impulsiveness Scale (BIS-11)] and drug experimentation (the number of drug classes an individual had tried in their lifetime) in up to 22,861 male and female adult human research participants of European ancestry. Impulsive personality traits and drug experimentation showed single nucleotide polymorphism heritabilities that ranged from 5 to 11%. Genetic variants in the CADM2 locus were significantly associated with UPPS-P Sensation Seeking (p = 8.3 × 10-9, rs139528938) and showed a suggestive association with Drug Experimentation (p = 3.0 × 10-7, rs2163971; r2 = 0.68 with rs139528938). Furthermore, genetic variants in the CACNA1I locus were significantly associated with UPPS-P Negative Urgency (p = 3.8 × 10-8; rs199694726). The role of these genes was supported by single variant, gene- and transcriptome-based analyses. Multiple subscales from both UPPS-P and BIS showed strong genetic correlations (>0.5) with Drug Experimentation and other substance use traits measured in independent cohorts, including smoking initiation, and lifetime cannabis use. Several UPPS-P and BIS subscales were genetically correlated with ADHD (rg = 0.30-0.51), supporting their validity as endophenotypes. Our findings demonstrate a role for common genetic contributions to individual differences in impulsivity. Furthermore, our study is the first to provide a genetic dissection of the relationship between different types of impulsive personality traits and various psychiatric disorders.SIGNIFICANCE STATEMENT Impulsive personality traits (IPTs) are heritable traits that are governed by frontal-subcortical circuits and are associated with neuropsychiatric disorders, particularly substance use disorders. We have performed genome-wide association studies of IPTs to identify regions and genes that account for this heritable variation. IPTs and drug experimentation were modestly heritable (5-11%). We identified an association between single nucleotide polymorphisms in CADM2 and both sensation seeking and drug experimentation; and between variants in CACNA1I and negative urgency. The role of these genes was supported by single variant, gene- and transcriptome-based analyses. This study provides evidence that impulsivity can be genetically separated into distinct components. We showed that IPT are genetically associated with substance use and ADHD, suggesting impulsivity is an endophenotype contributing to these psychiatric conditions.

THE RELATIONSHIP OF TIME PERCEPTION AND IMPULSIVENESS OF UKRAINIAN STUDENTS

Identifying the relationship between characteristics of the individual perception of time and the personality trait of impulsivity is the problem this study is devoted to. The aim of the study is to analyze the relationships between the various components of impulsiveness as a personality trait and the characteristics of an individual minute (IM) taking into account age and gender in a sample of Ukrainian university students (62 participants aged 17-22; 11 of them are men). To assess the features of time perception, the IM method was used according to F. Halberg. As the characteristics of MI, we used the mean and standard deviation for three consecutive measurements of IM and the average error of subjective time relative to objective one in percent. Impulsivity was measured using the UPPS-P Impulsive Behavior Scale test in the Ukrainian adaptation, which reveals 5 indicators of impulsivity: negative urgency, positive urgency, lack of premeditation, lack of perseverance, and sensation seeking. For Ukrainian students, impulsivity indicators correspond to the average norms of the French sample. The mean IM is 61.3 seconds and it is in the range of 36-88 seconds, the standard deviation of 3 IM measurements is 8 seconds, the average error of the subjective time relatively to the objective one was 9%. An inverse relationship between the mean duration of IM and the impulsivity index “positive urgency” was revealed. A direct relationship between the variability of the IM, the average error of the IM in percent and the impulsivity index “lack of perseverance” was also revealed. There are no signifiant differences in the mean duration of IM between men and women. At the same time, women have a signifiantly higher variability in time estimation – the standard deviation of IM is signifiantly greater in them than in men. By the characteristics of the impulsiveness, women have a signifiantly higher indicator of positive urgency than men. Age-related differences in the features of perception of time and impulsivity were not found. It will be worth to study relations of IM with other personality peculiarities such as Big Five traits and temperament types. This would give us more insights about diagnostical usefulness of IM measurements as proxy between physiological and psychological conditions of people.

Ventral striatal dopamine transporter availability is associated with lower trait motor impulsivity in healthy adults

Impulsivity is a transdiagnostic feature of a range of externalizing psychiatric disorders. Preclinical work links reduced ventral striatal dopamine transporter (DAT) availability with heightened impulsivity and novelty seeking. However, there is a lack of human data investigating the relationship between DAT availability, particularly in subregions of the striatum, and the personality traits of impulsivity and novelty seeking. Here we collected PET measures of DAT availability (BPND) using the tracer 18F-FE-PE2I in 47 healthy adult subjects and examined relations between BPND in striatum, including its subregions: caudate, putamen, and ventral striatum (VS), and trait impulsivity (Barratt Impulsiveness Scale: BIS-11) and novelty seeking (Tridimensional Personality Questionnaire: TPQ-NS), controlling for age and sex. DAT BPND in each striatal subregion showed nominal negative associations with total BIS-11 but not TPQ-NS. At the subscale level, VS DAT BPND was significantly associated with BIS-11 motor impulsivity (e.g., taking actions without thinking) after correction for multiple comparisons. VS DAT BPND explained 13.2% of the variance in motor impulsivity. Our data demonstrate that DAT availability in VS is negatively related to impulsivity and suggest a particular influence of DAT regulation of dopamine signaling in VS on acting without deliberation (BIS motor impulsivity). While needing replication, these data converge with models of ventral striatal functions that emphasize its role as a key interface linking motivation to action.

Alexithymia, Impulsivity, and Reward Sensitivity in Young Adult University Student Children of Alcoholics

Background and Objectives: Personality traits previously known as risk factors for alcohol use disorder (AUD) were assessed in 29 young adult children of alcoholics (COAs) and 68 young adult children of nonalcoholics (non-COAs). Male and female university students (Mage = 22.11 years) completed questions pertaining to demographics and alcohol use, and the Children of Alcoholics Screening Test; Toronto Alexithymia Scale; Barratt Impulsiveness Scale; Sensitivity to Punishment and Sensitivity to Reward Questionnaire; and Depression Anxiety Stress Scales. Results: Results indicated that personality traits of alexithymia, reward sensitivity, and impulsivity, as well as negative moods, were significantly elevated in COAs compared to non-COAs, independent of current alcohol consumption and drinking history. Conclusions: Findings are consistent with familial transmission of AUD-associated personality traits in COAs, presumably via influences of genetics and/or familial environment.

Exploring the direct or inverse association of physical activity with behavioral addictions and other self-regulation problems.

This cross-sectional survey study had the aim of clarifying the relationships between leisure time physical activity (LTPA) and non-drug-re-lated self-regulation problems (non-drug-related SRPs), including behavioral addictions, and the role of impulsive personality traits therein. Spanish university students (N = 329; Mage = 21.20) completed questionnaires for each of these constructs.Fitness and Bodybuilding LTPA was negatively associated with video gaming-related SRPs, r = -.13, p = .019, 95% CI (bootstrapped) [-.23, -.02], and positively associated with sex-related SRPs, r = .16, p = .005, 95% CI (bootstrapped) [.04, .30]. Endurance LTPA was associated with higher scores in eating-related SRPs, r = .17, p = .003, 95% CI (bootstrapped) [.02, .31]. The proportion of participants presenting scores above the clinically significant threshold in eating-related SRPs was 2.64 times higher for respondents in an Excessive Endurance LTPA cluster compared to the other respondents, Fisher's exact test, p = .017, OR = 3.10, 95% CI [1.26, 7.63], and the proportion of participants reporting vomiting to control weight was 2.12 times higher, Fisher's exact test, p = .040, OR = 2.43, 95% CI [1.06, 5.57]. The associations were largely independent of impulsive personality traits.We identified an elevated risk of eating pathology in a subgroup of participants with anomalously high participation in endurance physical activity. This overlap is consistent with the secondary dependence hypothesis of exercise addiction.

O suicídio de idosos em Teresina: fragmentos de autópsias psicossociais

This study aims to discuss about the circumstances that involved the suicide of elderly people that occurred in Teresina city, PI. It is a qualitative, descriptive, exploratory study made through psychosocial autopsies of five suicidal cases of elderly people. Thereunto, it was investigated retrospectively the life of these subjects, by interviews with relatives who lived nearby the victims. The method used has grouped three types of instruments: personal and social identification form of the elder, genogram and semi structured interview. The stories were analyzed qualitatively, reconstructed taking as a guide the principles of hermeneutical-dialectic. It has been observed that the outstanding presence of some risk circumstances associated to the investigated suicides, which there were fragile affective relationships, meaningless life, depression, abuse of alcohol, aggressive impulsive personality traits and occurrence of previous suicide attempts.

Bidirectional Relations of Impulsive Personality and Alcohol Use Across Three Waves of Data Collection

ABSTRACTObjective: To explore the bidirectional relations between alcohol use and three impulsive personality traits, to advance understanding of risk processes. Participants: 525 college students (mean age = 18.95 years) recruited in August 2008 and 2009 and followed up annually for three years. Methods: Personality and past/current substance use were assessed. Results: T2 sensation seeking mediated the predictive relationship between T1 and T3 alcohol use, and T2 alcohol use mediated the predictive relationship between T1 and T3 sensation seeking. In addition, T2 alcohol problems mediated the predictive relationship between T1 alcohol use and T3 negative urgency. Conclusions: Findings support a bidirectional relationship between sensation seeking and alcohol use, and drinking anticipates drinking problems, which predict increases in negative urgency. For some individuals, there appears to be an ongoing process of increased risk in the form of increases in both drinking and high-risk personality traits.

Negative urgency moderates reactivity to laboratory stress inductions.

Impulsive personality traits refer to a group of self-reported dispositions about self-regulatory capacity, several of which have been linked to diverse forms of psychopathology. One of these is negative urgency (NUR), the propensity to act out when experiencing negative emotions, which has been linked to substance use disorders and eating disorders. However, few laboratory studies have investigated the extent to which self-reported NUR relates to an individual's in vivo emotional and behavioral responses. Harmonizing two archival data sets on alcohol and high-energy-dense (HED) food motivation, the current study investigated NUR as a moderator of reactivity to stressful situations elicited by two commonly used stress manipulations, the Trier Social Stress Test and a stress imagery induction. A sample of 148 adults was assessed for NUR, severity of alcohol misuse or binge eating, and measures of negative affect and psychophysiological arousal (i.e., heart rate and blood pressure) prior to and following one of the two manipulations. In addition, a behavioral multiple-choice procedure assessing the relative reinforcing value of alcohol or HED foods followed the manipulations. As predicted, NUR positively moderated the effects of stress induction on self-reported negative affect and relative reinforcing value, although not arousal. Individuals exhibiting elevated NUR also exhibited greater alcohol misuse, although not greater binge eating severity. These findings provide in vivo validation of the construct of NUR and its measurement using the UPPS-P Impulsive Behavior Scale. More broadly, these findings inform the understanding of deficits that are characteristic of self-regulatory disorders. (PsycINFO Database Record

Segmentation Analysis of Susceptibility to Cybercrime: Exploring Individual Differences in Information Security Awareness and Personality Factors

AbstractThe present article aimed to explore if susceptibility to cybercrime can be linked to information security awareness and personality factors. A total of 1,054 participants aged between 18 and 84 years took part in an online survey consisting of a recently developed segmentation analysis tool designed to explore an individual’s susceptibility to cybercrime. Alongside this, two other scales measuring information security awareness and the personality trait of impulsivity were also included. In total, 60% of the population surveyed presented as being in the higher risk categories for susceptibility to cybercrime. Furthermore, individuals in the higher risk categories for susceptibility to cybercrime also presented poorer information security awareness, as well as having higher levels of trait impulsivity. It was also noted that certain demographic factors also linked to susceptibility to cybercrime, including age and current employment status, with the unemployed and student populations being less well represented in lower risk categories. This work is seen as being critical while designing effective intervention strategies that are designed to target specific at-risk populations, as well as presenting a key tool that could be widely used by organizations to examine risk within their own specific populations.

Depression and impulsiveness among soldiers who died by suicide: A psychological autopsy study

IntroductionDespite the accumulated knowledge about suicide, suicidal acts remain difficult to predict, and many suicides are acted out impulsively. MethodsWe performed a psychological autopsy study based on inquiries about the deaths of all male soldiers aged 18–21 years who served in the Israeli army and died by suicide between 2009 and 2013 (n = 69). The study population was first divided into two groups: those who had depressive disorder (n = 31); and those who did not (n = 38). Socio-demographic characteristics of the subjects and the characteristics of the suicidal act were compared. Afterwards, the study population was re-divided by the presence or absence of impulsive personality traits (n = 22, and n = 47, respectively), and investigated for distinct suicidal behavior features. ResultsNo significant socio-demographic differences were found between the depressed and non-depressed suicide victims. The depressed group had showed more signs of planning the act (47% vs. 23%), and had expressed suicidal ideation in the days preceding the suicide (51.6% vs. 21%). One third of the subjects were found to have an impulsive personality trait, with significantly more histories of disciplinary issues, violence and cluster B personality disorders. Alcohol use during the act was significantly more prevalent among impulsive than non-impulsive subjects (45.4% vs. 14.9%). ConclusionIdentification of distinct clinical groups of suicide victims among young males might help clinicians evaluate high risk cases, and may provide valuable opportunities to alleviate and prevent these events in the future.

F103. A META-ANALYSIS OF PERSONALITY TRAITS IN DUAL DIAGNOSIS PSYCHOSIS AND SUBSTANCE USE DISORDER

BackgroundThe comorbidity of substance use and psychotic disorders has been constantly explored in psychosis literature due to its markedly high prevalence and its contribution in debilitating outcomes in various aspects (e.g., lower therapeutic compliance, higher rate of relapse, longer hospitalization, homelessness, and poorer overall functioning). One promising conceptualization of substance use disorder in schizophrenia is understanding shared personality traits such as impulsivity. Thus far, empirical evidences indicated several personality traits as candidate such as impulsivity, neuroticism and anhedonia. However, the accumulated empirical data remains inconsistent across studies. Current study aimed to aggregate data regarding trait personality features in facet level utilizing four-factor UPPS model (Whiteside & Lynam, 2001), four-factor Hierarchical Structural Model (Markon, Krueger, & Watson, 2005), and anhedonia scale for investigating personality traits of impulsivity, neuroticism and anhedonia.MethodsA systematic literature research was conducted using PubMed, Google Scholar, Scopus, and ProQuest, dissertation database in Proquest, and hand searches from reference lists of identified articles. Our analysis covers all studies published up to May 2017. The electronic database research resulted in an initial pool of 110 studies in total, and 12 studies remains for current meta-analysis after screening by inclusion/exclusion criteria and removing duplicate studies. Two authors (SKJ and HJO) independently coded data, and all authors cross-checked to ensure the reliability of coded data to reach consensus. Effect-size estimates were calculated based on means and standard deviations of psychotic disorder only group (PSD) and dual diagnosis group (DD) on personality scales using R package metafor. Specifically, Hedges’ g was derived with a random-effect model, allowing unbiased effect sizes adjusted for different sample sizes that helps to infer population-level estimates. To examine potential confounding factors, independent two-sample t-tests were conducted between DD and PSD group for any significant differences in demographic and clinical characteristics. Fail-Safe N test was utilized to address publication bias of the current meta-analysis, and inconsistency of data was assessed using heterogeneity measure (I2). The methodological quality assessment of included studies was created by using an adapted version of Agency for Healthcare Research and Quality (AHRQ) tool for observational studies.ResultsThere were no statistically significant baseline differences in demographic and clinical characteristics between DD and PSD group. The results indicate that DD patients exhibited significantly higher scores on negative urgency, low premeditation, and sensation seeking compared to PSD within the UPPS model. However, low perseveration did not differ between two groups. Within the HS model, unconscientious disinhibition was significantly higher in DD compared to PSD, but not negative affect, disagreeable disinhibition, and positive affect. Lastly, trait anhedonia score was not significantly different between groups.DiscussionDespite a limited number of available studies, our meta-analysis allowed to specify the personality trait in facet level of dual diagnosis patients compared to patients without substance use disorder. We conclude that the personality trait of DD patients may lead to the employment of urgent emotional regulation strategies (i.e. substance use) to alleviate negative emotion. More effective emotion regulations strategies (e.g., mindfulness, emotion tolerance skills, etc) might need to be integrated for treatment for DD patients.

Body weight and its association with impulsivity in middle and old age individuals

Impulsivity, conceptualized as impulsive personality trait, poor inhibitory control and enhanced reward sensitivity, has been strongly linked to obesity. In particular, a disequilibrium between cognitive control and reward sensitivity has been observed in obese individuals in both behavioural and imaging studies. While this issue has been widely investigated in children and adults, it has received little attention in older adults. Here, obese and non-obese participants aged between 40 and 70 years completed the Barratt Impulsiveness scale (assessing motor, non-planning and attentional impulsiveness), a Go/no-go task with foods and non-foods (assessing inhibitory control) and a reward sensitivity battery with high and low caloric foods (assessing liking, wanting, tastiness and frequency of consumption). We observed that participants with higher BMI reported increased wanting for high calorie foods, but did not show poorer inhibitory control. Interestingly, participants who scored lower on the MMSE reported to consume high calorie more than low calorie foods. Finally, those who presented low scores on non-planning and motor impulsiveness subscales reported higher tastiness ratings for low calorie foods. These results show that increased reward sensitivity but not reduced inhibitory control may characterize higher BMI during aging. Importantly, they also highlight new findings concerning food preferences among older adults.

Ivestigation of intertemporal decision-making function and its correlation with impulsive personality characteristics of geriatric depressive patients

Objective To explore the intertemporal decision-making function in geriatric depressive patients and it’s correlation with impulsive personality traits. Methods Forty patients with geriatric depression(GD group) and Forty demographic characteristic matched health controls (HC group) were recruited.The delay discounting task was used to measure the decision-making function, and the barratt impulsiveness scale was used to measure the impulsive traits.The delay discounting rate (k) transformed to common logarithm lgk. Results Lgk and the scores of barratt impulsiveness scale, attention impulsiveness subscale, motor impulsiveness subscale in GD group((-2.00±0.81), (42.67±8.51), (46.50±16.84), (43.50±10.45)) were more larger than those in HC group ((-2.31±0.51), (32.27±6.18), (34.81±8.15), (26.88±7.65), and the differences were statistically significant (t=2.060, P=0.043; t=6.252, P<0.01; t=3.951, P<0.01; t=8.117, P<0.01). In addition, lgk had positive correlation with the scores of motor impulsiveness factor in GD group(r=0.408, P=0.009). Conclusion The delayed discounting ability is impaired and correlated with the motor impulsiveness in GD patients. Key words: Geriatric depression; Intertemporal decision-making; Delay discounting task; Impulsivity

Explaining suicide attempt with personality traits of aggression and impulsivity in a high risk tribal population of India.

IntroductionSuicide is a spectrum of behavior including suicide ideation and suicidal attempt and is undoubtedly the outcome of the interaction of several factors. The role of two main constructs of human nature, aggression and impulsivity, has been discussed broadly in relation to suicide, as endophenotypes or traits of personality, in research and in clinical practice across diagnoses. The objective of our study was to assess impulsive and aggressive behaviors among primitive people of the Idu Mishmi tribe, who are known for high suicide completer and attempter rates.MethodsThe study group was comprised of 177 unrelated Idu Mishmi participants divided into two sets: 39 suicide attempters and 138 non-attempters. Data on demographic factors and details of suicide attempts were collected. Participants completed a set of instruments for assessment of aggression and impulsivity traits.ResultsIn the Idu Mishimi population we screened (n = 177), 22.03% of the individuals had attempted suicide, a high percentage. The suicide attempters also showed a significant sex difference: 35.9% were male and 64.10% were female (p = .002*). The suicide attempters (A) scored significantly higher than non-attempters (NA) on aggression (A = 23.93,NA = 18.46) and impulsivity (A = 75.53,NA = 71.59, with p value = 0.05). The trait impulsiveness showed a significantly higher difference (F (1, 117) = 7.274) in comparison to aggression (F (1, 117) = 2.647), suggesting a profound role of impulsiveness in suicide attempts in the Idu Mishmi population. Analysis of sub-traits of aggression and impulsivity revealed significant correlations between them. Using different models, multivariate logistic regression implied roles of gender (OR = 1.079 (0.05)) and impulsiveness (OR = 3.355 (0.013)) in suicide attempts.ConclusionResults demonstrate that gender and impulsivity are strong risk factors for suicide attempts in the Idu Mishmi population.

Impulse control disorders in Parkinson's: Sleep disorders and nondopaminergic associations.

ObjectivesImpulse control disorders (ICDs) are common among patients with Parkinson's disease (PD). Risk factors identified for developing ICDs include young age, family history, and impulsive personality traits. However, the association of these potentially disabling disorders with nondopaminergic drugs and sleep disorders has been understudied. Our objective was to examine the association between ICDs and nondopaminergic medications and sleep disorders.MethodsWe conducted an observational study of 53 patients with PD from the National Institute of Neurology and Neurosurgery. ICDs were diagnosed using the Questionnaire for Impulsive–Compulsive Disorders in Parkinson's Disease Rating Scale (QUIP‐RS). Patients underwent polysomnography screening to diagnose the presence of sleep disorders. We documented the presence of dopaminergic and nondopaminergic medications, including monoamine oxidase type B inhibitors (MAOBIs), antidepressants, sleep inductors, and antipsychotics.Results ICDs were reported in 18.9% of the patients (n = 10), and sleep disorders were diagnosed in 81.1% of patients (n = 43). 32.1% of the patients were on antidepressants, 17% on MAOBIs, 15.1% on sleep inductors, and 1.9% on antipsychotics. We observed that QUIP‐RS A–D subscore depended on the presence of antidepressants (p = .03) and sleep inductors (p = .02). Sleep disorders were not associated with the total QUIP‐RS score (p = .93) or QUIP‐RS A–D subscore (p = .81).ConclusionAntidepressants and sleep inductors were significant predictors for individual QUIP‐RS items and subscores. Our results suggest that nondopaminergic drugs commonly used for PD may be associated with impulse control disorders. We did not identify a relationship between ICDs and polysomnography‐confirmed sleep disorders in patients with PD. Larger and longitudinal studies are needed to confirm our results.