A taxometric analysis of the latent structure of psychopathy: Evidence for dimensionality.

The taxonomic status of psychopathy is controversial. Whereas some studies have found evidence that psychopathy, at least its antisocial component, is distributed as a taxon, others have found that both major components of psychopathy-callousness/unemotionality and impulsivity/antisocial behavior-appear to distribute as dimensions and show little evidence of taxonicity. In the present study, recent advances in taxometric analysis were added to P. Meehl's (1995) multiple consistency tests strategy for assessing taxonicity, and they were applied to Psychopathy Checklist-Revised (R. D. Hare, 2003) ratings of 4,865 offenders sampled from multiple forensic settings. The results indicated that both the individual components of psychopathy and their interface are distributed dimensionally. Both the implications of these results for research in psychopathy and the integration of these findings with previous taxometric studies of psychopathy are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A taxometric study of the latent structure of disgust sensitivity: Converging evidence for dimensionality.

Disgust sensitivity has recently been implicated as a specific vulnerability factor for several anxiety-related disorders. However, it is not clear whether disgust sensitivity is a dimensional or categorical phenomenon. The present study examined the latent structure of disgust by applying three taxometric procedures (maximum eigenvalue, mean above minus below a cut, and latent-mode factor analysis) to data collected from 2 large nonclinical samples on 2 different measures of disgust sensitivity. Disgust sensitivity in the first sample (n=1,153) was operationalized by disgust reactions to food, animals, body products, sex, body envelope violations, death, hygiene, and sympathetic magic, as assessed by the Disgust Sensitivity Scale (J. Haidt, C. McCauley, & P. Rozin, 1994). Disgust Sensitivity Scale indicators of core, animal reminder, and contamination disgust were also examined in the 1st sample. Disgust sensitivity in the 2nd independent sample (n=1,318) was operationalized by disgust reactions to animals, injections and blood draws, mutilation and death, rotting foods, and odors, as assessed by the Disgust Emotion Scale (R. A. Kleinknecht, E. E. Kleinknecht, & R. M. Thorndike, 1997). Results across both samples provide converging evidence that disgust sensitivity is best conceptualized as a dimensional construct, present to a greater or lesser extent in all individuals. These findings are discussed in relation to the conceptualization and assessment of disgust sensitivity as a specific dimensional vulnerability for certain anxiety and related disorders. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A new SAS procedure for latent transition analysis: Transitions in dating and sexual risk behavior.

The set of statistical methods available to developmentalists is continually being expanded, allowing for questions about change over time to be addressed in new, informative ways. Indeed, new developments in methods to model change over time create the possibility for new research questions to be posed. Latent transition analysis, a longitudinal extension of latent class analysis, is a method that can be used to model development in discrete latent variables, for example, stage processes, over 2 or more times. The current article illustrates this approach using a new SAS procedure, PROC LTA, to model change over time in adolescent and young adult dating and sexual risk behavior. Gender differences are examined, and substance use behaviors are included as predictors of initial status in dating and sexual risk behavior and transitions over time. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The dimensionality of phonological awareness: An application of item response theory.

A battery of 7 tasks composed of 105 items thought to measure phonological awareness skills was administered to 945 children in kindergarten through 2nd grade. Results from confirmatory factor analysis at the task level and modified parallel analysis at the item level indicated that performance on these tasks was well represented by a single latent dimension. A 2-parameter logistic item response (IRT) model was also fit to the performance on the 105 items. Information obtained from the IRT model demonstrated that the tasks varied in the information they provided about a child's phonological awareness skills. These results showed that phonological awareness, as measured by these tasks, appears to be well represented as a unidimensional construct, but the tasks best suited to measure phonological awareness vary across development. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A new technique for rapid item analysis.

A rapid method of item analysis designed for use with Hankes-type (or Testscor) answer sheets is described. Whereas the item analysis of 25 versus 25 MMPI protocols usually takes… from 15 to 20 hours… use of the new method… [requires]… only four to five hours. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Second-order parallel processing: Visual search for the odd item in a subset.

Visual search tasks in which participants searched for an odd element in a subset of items were investigated. Participants searched for an item of odd orientation in the red subset. The target was a red line of X°, distractors were green lines of X° and red lines of Y°. The orientations, X and Y, changed on every trial. In this task, orientation information was useful only after color had been used to select the relevant subset. Results show that response time (RT) and error data were different from standard color X orientation conjunction searches (Experiment 1). RT?×?Set Size functions had slopes near 0 ms per item (Experiment 2). The selection of the subset appeared to take 200-300 ms (Experiments 2 and 3). Subset selection was based on properties of the relevant subset, not the irrelevant subset (Experiment 4). It was more difficult (perhaps impossible) to select a subset defined by 2 colors (Experiment 5). Random variation in an irrelevant dimension did not disrupt subset search (Experiment 6). (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Modified induced anxiety: A generalized anxiety reduction procedure.

A 25-yr-old male suffering from pervasive anxiety was treated with a modified induced anxiety procedure which attempted to focus the patient's awareness on the proprioceptive and somatic cues to anxiety, devoid of their situational context. A multiple-baseline design across 3 anxiety levels was used to demonstrate functional control over the problem behavior. Results indicate that as modified induced anxiety was sequentially applied to anxiety levels, there was a corresponding decline in self-monitored anxiety at the targeted level. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Examining student responses to frequent bullying: A latent class approach.

Bullying is a major concern in schools, yet there has been limited research examining the ways in which students respond to frequent victimization by their peers. The current study explored whether there are discrete groups of children who display similar patterns of responses to frequent bullying. We also examined the associations between the patterns of responding, characteristics of the victimization (form, chronicity, and perpetration of bullying), and co-occurring internalizing and externalizing symptoms. Latent class analysis regarding response strategies was conducted on data from 4,312 frequently victimized middle and high school students. The results revealed 4 common patterns of responses, including passive/low, active/support-seeking, aggressive and an undifferentiated/high pattern. The patterns of responses were differentially related to internalizing and externalizing symptoms, such that the children with the undifferentiated/high pattern were most likely to experience social–emotional problems and were more likely to experience indirect forms of victimization. Implications for future research on interventions with victimized children are discussed. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

A factor analysis of rating-scale item on the test anxiety questionnaire.

A principal components analysis and a varimax rotation were applied to scores on 34 items of the Test Anxiety Questionnaire (TAQ) obtained on 202 upperclassmen. 7 factors were extracted and interpreted as (a) confidence about individual intelligence testing, (b) perspiring about testing, (c) confidence during course examinations, (d) confidence about group intelligence testing, (e) heartbeat about testing, (f) confidence before course examinations, and (g) avoidance of intelligence testing. Factors or subtests of the TAQ when scored separately may provide more clear-cut relationships with intelligence, achievement, and learning measures. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Confirming the latent structure and base rate of schizotypy: A taxometric analysis.

P. E. Meehl's (1962, 1990) model of schizotypy and the development of schizophrenia implies that the structure of liability for schizophrenia is dichotomous and that a "schizogene" determines membership in a latent class, or taxon (Meehl and R. R. Golden, 1982). The authors sought to determine the latent structure and base rate of schizotypy. They applied Meehl's (1973) MAXCOV-HITMAX taxometric analytic procedures to a subset of items from the Perceptual Aberration Scale (PAS; L. J. Chapman et al, 1978), a prominent psychometric index of schizotypy, derived from a randomly ascertained nonclinical sample (N?=?1,093). The results, in accordance with Meehl's conjectures, strongly suggest that schizotypy, as assessed by the PAS, is taxonic at the latent level with a general population taxon base rate of approximately .10. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A multisample item response theory analysis of the Beck Depression Inventory-1A.

The widespread employment of the Beck Depression Inventory-1A ({bdi}-1{a}) has spawned a number of practices: (1) The employment of an unweighted total score as a measure of depression; (2) Its use in populations other than that in which it was normed; and (3) The employment of {bdi}-1{a} total scores in hypothesis tests about population differences in mean depression. A sequential procedure based on item response theory was employed to assess the validity of these practices for the case of 4 populations: clinical depressives (n?=?210), mixed nondepressed psychiatric patients (n?=?98), and students from 2 different universities (n?=?624). The findings suggest that the 1st practice was not justified for any of these populations, that the {bdi}-1{a} was employable only with clinical depressives and with 1 of the university populations, and that mean comparisons were not allowable. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Confirmatory factor analysis of the clinician-administered PTSD Scale: Evidence for the dimensionality of posttraumatic stress disorder.

The Clinician-Administered PTSD Scale (CAPS; Blake et al., 1990) is a structured interview that assesses the 17 key symptoms of posttraumatic stress disorder ( PTSD) as established in the Diagnostic and Statistical Manual of Mental Disorders (4th ed.; DSM–IV; American Psychiatric Association, 1994). CAPS data from 524 treatment-seeking male military veterans were submitted to confirmatory factor analysis to test a series of nested models reflecting alternative representations of PTSD dimensionality: (a) a 4-factor, 1st-order solution; (b) a 2-factor, higher order solution; (c) a single-factor, higher order solution; and (d) a single-factor, 1st-order solution. The model of best fit was the 4-factor, 1st-order solution, containing moderately to highly correlated yet distinct 1st-order factors corresponding to the reexperiencing, effortful avoidance, emotional numbing, and hyperarousal aspects of PTSD. Implications for theory, assessment, and future research are presented in this article. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A longitudinal study examining the influence of work and non-work stressors upon well-being: A multi-group analysis.

This paper investigates the longitudinal causal relationship between stressors and well-being within work, nonwork, and general life domains within university staff, trainee nurses, and part-time employees. Nested structural equation model comparison analysis tested whether nonwork stressors significantly contribute in predicting work, nonwork, and general well-being alongside work-related stressors. Findings showed that a complex spillover model is best fitting where work and nonwork stressors (T1) significantly influence work, nonwork, and general well-being (T2) across domains. Multigroup analysis revealed that this acceptable fitting model was also consistent simultaneously across two groups of data. The current study contributes to the literature by examining the causal relationships between stressors and well-being across life domains while incorporating a strong methodological design and statistical procedure. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A taxometric analysis of the Psychopathy Checklist: Screening Version (PCL:SV): Further evidence of dimensionality.

A taxometric analysis of the Psychopathy Checklist: Screening Version (PCL:SV; S. D. Hart, D. N. Cox, & R. D. Hare, 1995) was performed on a group of 2,250 male and female forensic/psychiatric patients and jail/prison inmates. The 4 PCL:SV facet scores (Interpersonal, Affective, Impulsive Lifestyle, Antisocial Behavior) served as indicators in this study, and the data were analyzed with 3 principal taxometric procedures-mean above minus below a cut, maximum eigenvalue, and latent mode factor analysis. The results show evidence of dimensional structure on the PCL:SV in the full sample as well as in all 8 subsamples (men, women, Whites, Blacks, hospital patients, jail/prison inmates, file review with an interview, file review without an interview). These findings corroborate recent taxometric research on the Psychopathy Checklist-Revised (R. D. Hare, 1991, 2003) in which results have been largely dimensional in nature. It is concluded that scores on the PCL:SV differ quantitatively as points on a dimension (high vs. low psychopathy) rather than partitioning into qualitatively distinct categories of behavior (psychopath vs. nonpsychopath). (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The dimensionality of social victimization: A preliminary investigation.

The purpose of the current study was to examine the dimensionality of social victimization and to assess the relation between social victimization and classmate social support in a sample of 260 students. Confirmatory factor analyses yielded four dimensions of peer victimization: overt, verbal social, and nonverbal social victimization and peer exclusion, providing preliminary evidence that social victimization is multidimensional. Boys reported experiencing greater levels of overt victimization than girls and girls were more likely to endorse experiencing peer exclusion. No gender differences were found with respect to children's experience of verbal and nonverbal forms of social victimization. Results suggest that middle school students were more likely to be the target of verbal social victimization than were elementary school students. Verbal social and nonverbal social victimization as well as peer exclusion demonstrated criterion-related validity. Implications for assessment and intervention for social victimization and suggestions for future research are discussed. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Isolating the contributions of familiarity and source information to item recognition: A time course analysis.

Recognition memory may be mediated by the retrieval of distinct types of information, notably, a general assessment of familiarity and the recovery of specific source information. A response-signal speed-accuracy trade-off variant of an exclusion procedure was used to isolate the retrieval time course for familiarity and source information. In 2 experiments, participants studied spoken and read lists (with various numbers of presentations) and then performed an exclusion task, judging an item as old only if it was in the heard list. Dual-process fits of the time course data indicated that familiarity information typically is retrieved before source information. The implications that these data have for models of recognition, including dual-process and global memory models, are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Replicated item level factor analysis of the full MMPI.

Conducted a comprehensive factor analysis of the full MMPI item pool using recent advances in computational facilities. Nearly 20,000 MMPI protocols were collected from 13–89 yr old psychiatric patients for the analysis; however, invalid records and protocols with more than 50 missing items were discarded. Analyses were computed on a developmental sample of 5,506 Ss and a cross-validation sample of 5,632 Ss. 21 replicated factors were found by using an orthogonal varimax solution. The rotated factors were submitted to several experts on MMPI for factor naming. The consensus obtained on the item factors suggests that this analysis provides an unambiguous picture of the major content dimensions in the MMPI item pool. (19 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A study of item weights and scale lengths for the SVIB.

7 SVIB scales were developed and cross validated on 461 managers from 13 varied Minnesota companies. Questions studied were (a) Which item weighting method results in the highest scale validity? (b) Are shorter scales as valid as longer scales? (c) How much may scales be shortened? (d) Why may they be shortened? Controls for scale length, content, validity, and for item weighting method were introduced. Results indicated (a) there was no practical difference in validities between simple unit versus variably weighted scales, (b) shorter scales were as valid as longer scales, (c) Clark's "40 to 60 item optimum scale length" hypothesis was supported, (d) although not conclusive, shorter scales appeared superior partly because their average item validities were greater and thus they perhaps should not be used where developmental item pools are rich in valid items. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

On the dimensionality of organizational justice: A construct validation of a measure.

This study explores the dimensionality of organizational justice and provides evidence of construct validity for a new justice measure. Items for this measure were generated by strictly following the seminal works in the justice literature. The measure was then validated in 2 separate studies. Study 1 occurred in a university setting, and Study 2 occurred in a field setting using employees in an automobile parts manufacturing company. Confirmatory factor analyses supported a 4-factor structure to the measure, with distributive, procedural, interpersonal, and informational justice as distinct dimensions. This solution fit the data significantly better than a 2- or 3-factor solution using larger interactional or procedural dimensions. Structural equation modeling also demonstrated predictive validity for the justice dimensions on important outcomes, including leader evaluation, rule compliance, commitment, and helping behavior. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Individuation, peers, and adolescent alcohol use: A latent growth analysis.

The study used latent growth modeling to investigate longitudinal relationships between individuation, peer alcohol use, and adolescent alcohol use among African American, Mexican American, and non-Hispanic White adolescents (N=6,048) from 7th, 8th, and 9th grades over a 3-year period. Initial levels of peer alcohol use were significantly related to changes in adolescents' alcohol use, whereas initial adolescent alcohol use also significantly related to changes in peers' alcohol use, suggesting a bidirectional relationship. Higher levels of intergenerational individuation were related to smaller increases in adolescent alcohol use and higher levels of separation were related to larger increases in youth drinking. The findings were similar across ethnic groups. Implications for development of prevention and intervention programs are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)