Cluster Analytic Study Research Articles

The role of English in South African multilinguals’ linguistic repertoires: a cluster-analytic study

ABSTRACT A substantial body of research has examined the role of English in South Africans’ linguistic repertoires. Many of these studies have investigated whether a language shift towards English might be underway among first-language (L1) speakers of the indigenous languages. At the same time, the role of English in the repertoires of L1 English speakers has received little attention, the implicit assumption being that English remains dominant for them. This paper presents an empirically informed comparison of English experience within and across L1 and non-L1 (Ln) English speakers in order to shed light on the importance of English in these individuals’ repertoires. Cluster analysis is employed to analyze language background data from bi-/multilinguals (n = 200). The analysis produces two clusters, which differ in extent of English exposure and preference for English use. All but one of the L1 English speakers belong to the ‘higher exposure, higher preference’ cluster, while the vast majority of the Ln speakers fall into the ‘lower exposure, lower preference’ cluster. The results indicate that English experience is relatively homogeneous across L1 speakers but differs, for the most part, across L1 and Ln speakers. The findings are relevant to our understanding of language use in multilingual South Africa.

The place of obsessive-compulsive and related disorders in the compulsive-impulsive spectrum: a cluster-analytic study.

The extent to which obsessive-compulsive and related disorders (OCRDs) are impulsive, compulsive, or both requires further investigation. We investigated the existence of different clusters in an online nonclinical sample and in which groups DSM-5 OCRDs and other related psychopathological symptoms are best placed. Seven hundred and seventy-four adult participants completed online questionnaires including the Cambridge-Chicago Compulsivity Trait Scale (CHI-T), the Barratt Impulsiveness Scale (BIS-15), and a series of DSM-5 OCRDs symptom severity and other psychopathological measures. We used K-means cluster analysis using CHI-T and BIS responses to test three and four factor solutions. Next, we investigated whether different OCRDs symptoms predicted cluster membership using a multinomial regression model. The best solution identified one "healthy" and three "clinical" clusters (ie, one predominantly "compulsive" group, one predominantly "impulsive" group, and one "mixed"-"compulsive and impulsive group"). A multinomial regression model found obsessive-compulsive, body dysmorphic, and schizotypal symptoms to be associated with the "mixed" and the "compulsive" clusters, and hoarding and emotional symptoms to be related, on a trend level, to the "impulsive" cluster. Additional analysis showed cognitive-perceptual schizotypal symptoms to be associated with the "mixed" but not the "compulsive" group. Our findings suggest that obsessive-compulsive disorder; body dysmorphic disorder and schizotypal symptoms can be mapped across the "compulsive" and "mixed" clusters of the compulsive-impulsive spectrum. Although there was a trend toward hoarding being associated with the "impulsive" group, trichotillomania, and skin picking disorder symptoms did not clearly fit to the demarcated clusters.

Distinguishing between healthy and pathological orthorexia: a cluster analytic study.

This study represents a first attempt to explore the typology of female adults from a large non-clinical sample based on healthy orthorexia (HO) and pathological orthorexia (orthorexia nervosa, ON). 1245 female adults (Mage = 38.04, SD = 9.73) completed a set of questionnaires assessing orthorexic behaviors, intuitive eating, self-esteem, perceived social support as well as eating disorders, depressive and anxiety symptoms. Cluster analysis based on HO and ON scores yielded 4 distinct groups: "Healthy orthorexia cluster" (HO), "Orthorexia Nervosa cluster" (ON), "Low Orthorexia cluster" (LO) and "In-between Orthorexia cluster" (IBO). The HO and ON clusters represented individuals with, respectively, healthy and pathological interest in healthy diet. The LO cluster represented those with no particular interest in healthy eating and the IBO cluster showed that ON and HO behaviors can be associated in some individuals. Among all clusters, the ON cluster displayed highest levels of ED, anxiety and depressive symptoms. Inversely, the HO cluster displayed highest levels of intuitive eating, self-esteem and perceived social support. Altogether, findings from this study support the bidimensional structure of orthorexic eating behavior and further suggest that ON and HO behaviors can be associated in some individuals. Our findings further provide evidence for the assumption that ON and HO could be seen, respectively, as maladaptive and protective eating behaviors. V, descriptive study.

Is Machiavellianism associated with depression? A cluster-analytic study

The link between Machiavellianism and depression remains poorly understood. In this study, we examined the relationship between Machiavellianism and depression using both a variable- and a person-centered approach. A total of 675 university students anonymously completed an online survey. Depression was assessed with the PHQ-9 and Machiavellianism with the Machiavellian Personality Scale (MPS). The MPS was translated into French and Italian for the purpose of the study. Confirmatory factor analysis showed that the translated versions exhibited the expected factorial structure. General health status and student satisfaction were additionally gauged using single-item measures. Machiavellianism was found to correlate positively with depressive symptoms, and negatively with general health status and student satisfaction. However, the identified correlations were generally of small magnitude. The Machiavellianism-depression association was primarily driven by the distrust and amorality components of Machiavellianism. Remarkably, cluster analysis showed that higher levels of Machiavellianism most often coexisted with low levels of depressive symptoms. On balance, our findings are not indicative of a substantial link between Machiavellianism and depression. Potential moderators of the Machiavellianism-depression relationship―such as intelligence quotient or empathic accuracy―may be worth examining in future research.

Corrigendum to: Burnout, depression and paranoid ideation: a cluster-analytic study.

Corrigendum to: Burnout, depression and paranoid ideation: a cluster-analytic study.

What are the specificities of social cognition in schizophrenia? A cluster-analytic study comparing schizophrenia with the general population

While social cognition (SC) is widely recognized as being impaired in schizophrenia, little is known about the potential heterogeneity in individuals’ functioning. Using a wide range of SC measures and a cluster-analytic approach, we compared SC profiles in the general population and in people with schizophrenia. A total of 131 healthy controls and 101 participants with schizophrenia were included. Groups were compared on sociodemographic, neurocognition, anxiety and depressive mood variables. Three profiles were identified in healthy controls: one with good SC abilities (Homogeneous SC group) and two with specific weaknesses in complex Facial Emotion Recognition (Low FER group) or Affective Theory of Mind (Low AToM group). However, these patterns were not found in participants with schizophrenia, who were characterized rather by levels of SC functioning (i.e., Low, Medium and High SC groups). Importantly, while the High SC group (47.9% of the sample) exhibited normal performances, the two others were underpinned by different pathological processes (i.e., alexithymia for Medium SC group or neurocognition dysfunctioning for Low SC group). These results have important implications for future research as well as for clinical practice regarding assessment methodology and therapeutic interventions.

Burnout, depression and paranoid ideation: a cluster-analytic study

A link between burnout and paranoid ideation has long been suspected. However, systematic research on the association has been scarce. We investigated the relationship between burnout and paranoid ideation. Because burnout overlaps with depression, depression was also examined. A total of 218 Swiss schoolteachers participated in the study (58% female; mean age: 47). Burnout symptoms were assessed with the emotional exhaustion (EE) and depersonalization (DP) subscales of the Maslach Burnout Inventory-Educators Survey, depressive symptoms with the PHQ-9 and paranoid ideation with the Green et al. Paranoid Thought Scales. Burnout, depression and their subdimensions showed raw correlations ranging from 0.42 to 0.55 with paranoid ideation. Burnout, depression and paranoid thoughts were found to cluster together. Lower levels of burnout and depression coexisted with lower levels of paranoid ideation and higher levels of burnout and depression coexisted with higher levels of paranoid ideation. When corrected for measurement error, the correlations of EE with depression and DP were 0.96 and 0.57, respectively. A principal component analysis confirmed that EE was indistinguishable from depression. Burnout is substantially associated with paranoid ideation. Interestingly, EE correlated as strongly with paranoid ideation as it correlated with DP. Moreover, if burnout is a syndrome of EE and DP that excludes depression, then the EE-depression correlation should not be close to 1 and EE should not correlate more strongly with depression than with DP. These basic requirements for construct distinctiveness and syndromal unity were not satisfied.

Could schizotypy protect against the negative outcomes of borderline traits on alcohol consumption? A cluster analytic study

Schizotypal and borderline personality traits seem to be differently associated to alcohol use in young adult. However, no study has explored co-occurring schizotypal and borderline traits in their link with alcohol consumption. Participants were 1572 students from different French universities who completed self-report questionnaires assessing these three dimensions. A cluster analysis based on the borderline and schizotypal traits scores yielded four distinct groups characterized by low schizotypal and borderline traits (LT), high borderline traits (HB), high schizotypal and borderline traits (HT) and high schizotypal traits (HS). The HS cluster had significantly lower alcohol use than the other three groups. LT and HT clusters did not differ significantly in their alcohol use. Comparison between clusters suggests that schizotypal traits may be protective against the negative impact of borderline traits on alcohol consumption. In the context of a co-occurrence between borderline and schizotypal traits, this study provides important information about their link with alcohol consumption.

Profiles of Cyberpornography Use and Sexual Well-Being in Adults

IntroductionAlthough findings concerning sexual outcomes associated with cyberpornography use are mixed, viewing explicit sexual content online is becoming a common activity for an increasing number of individuals. AimTo investigate heterogeneity in cyberpornography-related sexual outcomes by examining a theoretically and clinically based model suggesting that individuals who spend time viewing online pornography form three distinct profiles (recreational, at-risk, and compulsive) and to examine whether these profiles were associated with sexual well-being, sex, and interpersonal context of pornography use. MethodsThe present cluster-analytic study was conducted using a convenience sample of 830 adults who completed online self-reported measurements of cyberpornography use and sexual well-being, which included sexual satisfaction, compulsivity, avoidance, and dysfunction. Main Outcomes MeasuresDimensions of cyberpornography use were assessed using the Cyber Pornography Use Inventory. Sexual well-being measurements included the Global Measure of Sexual Satisfaction, the Sexual Compulsivity Scale, the Sexual Avoidance Subscale, and the Arizona Sexual Experiences Scale. ResultsCluster analyses indicated three distinct profiles: recreational (75.5%), highly distressed non-compulsive (12.7%), and compulsive (11.8%). Recreational users reported higher sexual satisfaction and lower sexual compulsivity, avoidance, and dysfunction, whereas users with a compulsive profile presented lower sexual satisfaction and dysfunction and higher sexual compulsivity and avoidance. Highly distressed less active users were sexually less satisfied and reported less sexual compulsivity and more sexual dysfunction and avoidance. A larger proportion of women and of dyadic users was found among recreational users, whereas solitary users were more likely to be in the highly distressed less active profile and men were more likely to be in the compulsive profile. ConclusionThis pattern of results confirms the existence of recreational and compulsive profiles but also demonstrates the existence of an important subgroup of not particularly active, yet highly distressed consumers. Cyberpornography users represent a heterogeneous population, in which each subgroup is associated with specific sexual outcomes.

A Cluster Analytic Study of the Wechsler Intelligence Test for Children-IV in Children Referred for Psychoeducational Assessment Due to Persistent Academic Difficulties

Wechsler Intelligence Test for Children-IV core subtest scores of 472 children were cluster analyzed to determine if reliable and valid subgroups would emerge. Three subgroups were identified. Clusters were reliable across different stages of the analysis as well as across algorithms and samples. With respect to external validity, the Globally Low cluster differed from the other two clusters on Wechsler Individual Achievement Test-II Word Reading, Numerical Operations, and Spelling subtests, whereas the latter two clusters did not differ from one another. The clusters derived have been identified in studies using previous WISC editions. Clusters characterized by poor performance on subtests historically associated with the VIQ (i.e., VCI + WMI) and PIQ (i.e., POI + PSI) did not emerge, nor did a cluster characterized by low scores on PRI subtests. Picture Concepts represented the highest subtest score in every cluster, failing to vary in a predictable manner with the other PRI subtests.

Profiling approaches to teaching in higher education: a cluster-analytic study

Teaching approaches in higher education have already been the subject of a considerable body of research. An important contribution was Prosser and Trigwell's development of the Approaches to Teaching Inventory (ATI). The present study aims to map out the approaches to teaching profiles of teachers in higher education on the basis of their scores on the ATI. The assignment of teachers to different profiles reflects a particular combination of scores on the ATI, which yields more information relative to teachers' scores on the separate scales. Our results also provide further insight into the validity of the ATI as an instrument for ascertaining teachers' approaches to teaching. Cluster analysis of the ATI data from 377 teachers revealed four profiles. Interview data with 30 teachers enabled us to obtain more detailed pictures of the profiles. Differences between the profiles in terms of gender, discipline and type of higher education institute were analysed.

Patterns of deficits in brain function in bipolar disorder and schizophrenia: A cluster analytic study

Historically, bipolar disorder and schizophrenia have been considered distinct disorders with different etiologies. Growing evidence suggests that overlapping genetic influences contribute to risk for these disorders and that each disease is genetically heterogeneous. Using cluster analytic methods, we empirically identified homogeneous subgroups of patients, their relatives, and controls based on distinct neurophysiologic profiles. Seven phenotypes were collected from two independent cohorts at two institutions. K-means clustering was used to identify neurophysiologic profiles. In the analysis of all participants, three distinct profiles emerged: “globally impaired”, “sensory processing”, and “high cognitive”. In a secondary analysis, restricted to patients only, we observed a similar clustering into three profiles. The neurophysiological profiles of the Schizophrenia (SZ) and Bipolar Disorder (BPD) patients did not support the Diagnostic and Statistical Manual of Mental Disorders (DSM) diagnostic distinction between these two disorders. Smokers in the globally impaired group smoked significantly more cigarettes than those in the sensory processing or high cognitive groups. Our results suggest that empirical analyses of neurophysiological phenotypes can identify potentially biologically relevant homogenous subgroups independent of diagnostic boundaries. We hypothesize that each neurophysiology subgroup may share similar genotypic profiles, which may increase statistical power to detect genetic risk factors.

Brain injury beliefs, self-awareness, and coping: A preliminary cluster analytic study based within the self-regulatory model

The interplay between individuals’ subjective beliefs about traumatic brain injury, their coping style and their self-awareness might provide a more helpful guide to rehabilitation goals than looking at these factors in isolation. We therefore conducted a preliminary study to determine whether the Self-Regulatory Model can identify different clusters of individuals according to belief schemata, and to explore whether clusters differed across measures of coping and self-awareness. The Illness Perception Questionnaire–Revised was administered to 37 participants with severe traumatic brain injury (TBI), along with the Ways of Coping Checklist–Revised and the European Brain Injury Questionnaire. Clinicians also rated clients’ level of difficulties using the latter scale, and the discrepancy between client and clinician scores was used as a measure of self-awareness. Hierarchical cluster analysis distinguished three groups based on profiles of subjective beliefs about TBI, labelled “low control/ambivalent”, “high salience”, and “high optimism”. The high salience group was characterised by beliefs about serious consequences of the injury and greater self-awareness, and reported a greater range of coping strategies. The other two groups showed lower levels of awareness but differed in coping styles, with the low control/ambivalent group showing a trend towards more avoidance coping against a background of lower perceived control.

Therapists' big five personality traits and interpersonal functioning in the substance abuse field: A cluster-analytic study

Background: Considerable differences exist between therapists in the outcomes of psychotherapy and substance abuse treatment. There is no clear understanding of the extent to which these differences can be explained by the personality traits or interpersonal functioning of the therapists.Aims: This study seeks to shed some light on their personal qualities. The aim was to group Finnish substance abuse therapists (N = 97) based on their personality traits and interpersonal functioning.Methods: Personality traits were measured using a test based on the five-factor model and interpersonal functioning with a vignette task.Results: The cluster analysis yielded a three-group model. The first two groups differed considerably in their personality traits, yet their interpersonal functioning was on almost the same level. The personality traits of the third group were close to standard average. Their interpersonal functioning was clearly on a lower level than that of the other two groups. The groups also differed from each other with respect to some background variables and therapeutic orientation.Conclusions: In the future, the grouping should be linked to treatment processes and outcomes. The results are also of interest with an eye to student selection, recruitment of therapists, and supervision at work.

Identifying subtypes among offenders with antisocial personality disorder: A cluster-analytic study.

The question of whether antisocial personality disorder (ASPD) and psychopathy are largely similar or fundamentally different constructs remains unresolved. In the Diagnostic and Statistical Manual of Mental Disorders (4th ed.; DSM-IV; American Psychiatric Association, 1994), many of the personality features of psychopathy are cast as associated features of ASPD, although the DSM-IV offers no guidance as to how, or the extent to which, these features relate to ASPD. In a sample of 691 offenders who met DSM-IV criteria for ASPD, we used model-based clustering to identify subgroups of individuals with relatively homogeneous profiles on measures of associated features (psychopathic personality traits) and other constructs with potential etiological significance for subtypes of ASPD. Two emergent groups displayed profiles that conformed broadly to theoretical descriptions of primary psychopathy and Karpman's (1941) variant of secondary psychopathy. As expected, a third group (nonpsychopathic ASPD) lacked substantial associated features. A fourth group exhibited elevated psychopathic features as well as a highly fearful temperament, a profile not clearly predicted by extant models. Planned comparisons revealed theoretically informative differences between primary and secondary groups in multiple domains, including self-report measures, passive avoidance learning, clinical ratings, and official records. Our results inform ongoing debates about the overlap between psychopathy and ASPD and raise questions about the wisdom of placing most individuals who habitually violate social norms and laws into a single diagnostic category.

Profile of Adults with Congenital Heart Disease Having a Good, Moderate, or Poor Quality of Life: A Cluster Analytic Study

The purpose of the study was to assess the profile of adult patients with congenital heart disease who reported a good, moderate, or poor quality of life. We conducted a secondary analysis of data from a large-scale quality-of-life study that included 627 patients. Demographic and clinical variables were retrieved from the medical records and functional status from patient interviews. Overall quality of life was measured using a Linear Analogue Scale. Using K-means cluster analysis, we categorized subjects into a 3-cluster solution: good, moderate, or poor quality of life. Four hundred ninety patients (78.1%) clustered into the good quality-of-life category; 126 patients (20.1%) clustered into the moderate quality-of-life category; and 11 patients (1.8%) clustered into the poor quality-of-life category. Poorer quality of life was associated with lower educational level, unemployment or disability, associated syndromes, instability of the heart disease, and a poorer functional status. Over three-quarters of the patients had a good quality of life, whereas only a small proportion had a poor quality of life. Specific demographic and clinical characteristics associated with a poor quality of life could assists in identifying patients at risk for developing a poor quality of life.

Profiling individual differences in student motivation: A longitudinal cluster-analytic study in different academic contexts

This research examined whether distinct student profiles emerged from measures of interest, mastery goals, task value, and self-efficacy in samples of Norwegian student nurses and business administration students. Additionally, profile differences in self-reported strategy use and epistemological beliefs were examined, as well as changes in student profiles over one academic year. Distinct groups of participants were identified in both samples, with considerable consistency in student profiles across the two academic contexts. In both contexts, more positively motivated participants consistently reported more use of deeper-level strategies and expressed more sophisticated beliefs about the nature of knowledge and knowledge acquisition. The longitudinal analysis showed that despite overall decreases in adaptive motivation in both contexts, many participants were able to maintain relatively high levels of motivation across the academic year, and, especially among the business administration students, quite a few developed more adaptive motivation over time. Yet, a great many participants in both samples lost some of their enthusiasm and engagement.

A cluster analytic study of osteoprotective behavior in undergraduates.

To derive an empirical taxonomy of osteoprotective stages using the Precaution Adoption Process Model (PAPM) and to identify the predisposing factors associated with each stage. An anonymous survey was completed by 504 undergraduates at a Midwestern public university. Cluster analytic findings indicate that only 2 osteoprotective stages exist in young adults: less engaged and engaged. These two groups were best distinguished by health motivation, sex, a perceived barrier to exercise, and exercise self-efficacy. Fine-grained stages of osteoprotective behavior are not apparent in young adults, suggesting that the PAPM may not be useful for explaining the adoption of osteoporosis precautions.

FC11.04 A cluster analytic study of normal adolescents with neurodevelopmental neurocognitive, personality and social risk factors for schizophrenia spectrum disorders

FC11.04 A cluster analytic study of normal adolescents with neurodevelopmental neurocognitive, personality and social risk factors for schizophrenia spectrum disorders

A Cluster-Analytic Study of Substance Problems and Mental Health Among Street Youths

Based on a cluster analysis of 211 street youths aged 13–24 years interviewed in 1992 in Toronto, Ontario, Canada, we describe the configuration of mental health and substance use outcomes. Eight clusters were suggested: Entrepreneurs (n = 19) were frequently involved in delinquent activity and were highly entrenched in the street lifestyle; Drifters (n = 35) had infrequent social contact, displayed lower than average family dysfunction, and were not highly entrenched in the street lifestyle; Partiers (n = 40) were distinguished by their recreational motivation for alcohol and drug use and their below average entrenchment in the street lifestyle; Retreatists (n = 32) were distinguished by their high coping motivation for substance use; Fringers (n = 48) were involved marginally in the street lifestyle and showed lower than average family dysfunction; Transcenders (n = 21), despite above average physical and sexual abuse, reported below average mental health or substance use problems; Vulnerables (n = 12) were characterized by high family dysfunction (including physical and sexual abuse), elevated mental health outcomes, and use of alcohol and other drugs motivated by coping and escapism; Sex Workers (n = 4) were highly entrenched in the street lifestyle and reported frequent commercial sexual work, above average sexual abuse, and extensive use of crack cocaine. The results showed that distress, self-esteem, psychotic thoughts, attempted suicide, alcohol problems, drug problems, dual substance problems, and dual disorders varied significantly among the eight clusters. Overall, the findings suggest the need for differential programming. The data showed that risk factors, mental health, and substance use outcomes vary among this population. Also, for some the web of mental health and substance use problems is inseparable.