Empathizing and systemizing are differentially related to dimensions of autistic traits in the general population

Background/Objective:

Empathizing-Systemizing Theory suggests that low empathizing and high systemizing are linked to autistic traits in the general population. Evidence from autistic individuals is convincing, but more research in the normal population is needed. Method: We conducted two surveys (N = 3,345) investigating the relationships between empathizing, systemizing and autistic traits in the general population, using a large variety of self-report instruments and direct performance tests. Results: Strong connections between autistic symptoms, empathizing, and systemizing were found using commonly used measures (Autism Quotient, Systemizing Quotient and Empathizing Quotient). Other measures on empathizing and systemizing found the connections that E-S-theory predicts, but the correlations were a lot more modest. Weak empathizing was related to autism's social difficulties, while systemizing was linked to non-social aspects of autism. Conclusions: The present results support the main tenets of empathizing-systemizing theory, but suggest that earlier findings might be inflated due to overlapping items in the most common assessment instruments.     

Sex-specific variation in facial masculinity/femininity associated with autistic traits in the general population

Reports linking prenatal testosterone exposure to autistic traits and to a masculinized face structure have motivated research investigating whether autism is associated with facial masculinization. This association has been reported with greater consistency for females than for males, in studies comparing groups with high and low levels of autistic traits. In the present study, we conducted two experiments to examine facial masculinity/femininity in 151 neurotypical adults selected for either low, mid-range, or high levels of autistic traits. In the first experiment, their three-dimensional facial photographs were subjectively rated by 41 raters for masculinity/femininity and were objectively analysed. In the second experiment, we generated 6-face composite images, which were rated by another 36 raters. Across both experiments, findings were consistent for ratings of photographs and composite images. For females, a linear relationship was observed where femininity ratings decreased as a function of higher levels of autistic traits. For males, we found a U-shaped function where males with mid-range levels of traits were rated lowest on masculinity. Objective facial analyses revealed that higher levels of autistic traits were associated with less feminine facial structures in females and less masculine structures in males. These results suggest sex-specific relationships between autistic traits and facial masculinity/femininity.     

The dimensions of change in therapeutic community treatment instrument

In this article, the authors describe the refinement and preliminary evaluation of the Dimensions of Change in Therapeutic Community Treatment Instrument (DCI), a measure of treatment process. In Study 1, a 99-item DCI, administered to a cross-sectional sample of substance abuse clients (N = 990), was shortened to 54 items on the basis of results from confirmatory factor analyses and item response theory invariance tests. In Study 2, confirmatory factor analyses of the 54-item DCI, completed by a longitudinal cohort of 993 clients, established and validated an 8-factor solution across 2 subpopulations (adults and adolescents) and 2 time points (treatment entry and 30-days postentry). The results of the 2 studies are encouraging and support use of the 54-item DCI as a tool to measure treatment process.     

Evidence for a central representation of instrument timbre

An information processing account of perception seeks to delineate the stages of processing through which a stimulus passes and determine the properties of the representation at each stage. Research in phonetic perception has identified two stages, the second of which is thought to encode abstract acoustic attributes of sounds. The present study provided a further test of this proposal by assessing whether nonphonetic stimuli could yield results similar to those obtained with phonetic stimuli. Five selective adaptation experiments were carried out with a trumpet—piano timbre continuum. Two manipulations were used to measure abstract encoding: cross-ear presentation of adaptor and test series, and the use of adaptors that were acoustically different from the continuum endpoints. The results provide evidence for an abstract representation of timbre. The similarity of the findings to those in the phonetic adaptation literature is discussed.     

Evaluating preference assessments for use in the general education population

This study compared the effectiveness of a multiple-stimulus-without-replacement (MSWO) preference assessment and teacher preference ranking in identifying reinforcers for use in a general education setting with typically developing elementary-school children. The mean number of digits correctly answered was greater in the MSWO-selected reward and the teacher-selected reward conditions relative to the no-reward condition for 2 of the 4 participants, but there were no differences between the MSWO-selected and teacher-selected reward conditions for any participant.     

The general factor of personality and general intelligence: Evidence for substantial association

Despite theoretical assertions derived from life history theory, research on the relationship between the general factor of personality and general intelligence has shown that there is little overlap between the two higher-order constructs. It is argued that the association between these general factors is largely attenuated by measurement error in assessing the general factor of personality. A substantial association between the general factors at multiple points in time was found when the general factor of personality was derived from rater Q-sorts. The results have important implications for the study of individual differences.     

Schizotypy and verbal memory in the adolescent general population

The following study examines the relationship between verbal memory deficits and schizotypal traits measured psychometrically from a non- clinical adolescent population. In this transversal analytical study participated 139 subjects. They were secondary school students, with ages ranging from 13 to 16 years old (mean= 14, 35; Sta.Dev.= 0, 548). After administrating the scales O-LIFE (psychometrical schizotypy), CVLT (verbal memory), and Letters and Numbers subtest of WAIS-III (working memory), data was analyzed utilizing Pearson correlations and mean comparison test. Results showed lack of relations between schizotypy measures and working memory. Nonetheless, some of the O-LIFE dimensions correlated with verbal memory. These findings support partly the literature reviewed. Yet, more work focused on schizotypy and cognitive deficits as risk factors are suggested.     

Evaluation of the diagnostic interview for children and adolescents for use in general population samples

This article presents evaluative data on the use of the Diagnostic Interview for Children and AdolescentsRevised (DICAR) to classify DSM-IIIR disorders in the general population. Data for the analyses came from a probability sample (N=251) of parentchild/adolescent dyads aged 6 to 16 separately administered the DICAR on two occasions, 10 to 20 days apart, by trained lay interviewers and child psychiatrists. Data are presented on prevalence,testretest reliability, parentchild/adolescent agreement, and trained lay interviewerchild psychiatrist agreement. High prevalences of oppositional defiant disorder derived from parent assessments and overanxious disorder and dysthymia derived from adolescent assessments suggest that these disorders may be overidentified. Interview data provided by 6 to 11year olds to classify the internalizing disorders were too unreliable to be useful. Agreement between parentchild/adolescent dyads was generally low while agreement between trained lay interviewerschild psychiatrists was generally high.This work was supported by funds from the National Health Research and Development Program (grant number 6606-3760-42) and the Ontario Ministry of Community and Social Services, and was carried out by the Child Epidemiology Unit, Department of Psychiatry, McMaster University and the Child and Family Centre, Chedoke-McMaster Hospitals, Hamilton, Ontario. Dr. Boyle is supported by a William T. Grant Foundation Faculty Scholar Award; Dr. Offord by a National Health Scientist Award, Health and Welfare Canada; Dr. Szatmari by a Research Fellowship, Ontario Mental Health Foundation; and Dr. Fleming by a NARSAD Young Investigator Award. The authors wish to thank the Hamilton Board of Education, particularly Mr. Keith Reilly and Mr. Owen Jackson; principals and teachers of the Board; and parents and students for their help on this project. Our appreciation also extends to Ms. Barb Hall who assisted in the analysis of the data.     

Evidence for a general factor model of ADHD in adults

Objective: To examine factor structures of Diagnostic and Statistical Manual of Mental Disorders (4th ed.) symptoms of ADHD in adults. Method: Two sets of models were tested: (a) models with inattention and hyperactivity/impulsivity as separate but correlated latent constructs and (b) hierarchical general factor models with a general factor for all symptoms and separate specific factors for inattention and hyperactivity/impulsivity. Participants were 751 adults with ADHD. Two models with correlated factors and two general factor models of ADHD symptoms were tested. Results: The general factor model provided a better fit of the data than the correlated models. The general factor model with one general and three (inattention, motoric, and verbal hyperactivity/impulsivity) specific factors best accounted for the adults' symptoms. Conclusion: These results suggest a unitary component to ADHD symptoms as well as dimensional specific factors. The replication of a general factor in adults suggests continuity of symptom presentation from childhood into adulthood. Clinical implications are discussed.     

Relationships between dimensions of depressive experience and perceptions of the lives of people in general

This study examines relationships between depression and perceptions of the lives of people in general. One hundred fourteen college students completed the Center for Epidemiological Studies Depression Scale (Radloff, 1977), the Depressive Experiences Questionnaire (Blatt, D'Afflitti, & Quinlan, 1976), and two instruments that asked subjects to make judgments about the frequency of various positive and negative outcomes in other people's lives. Highly Dependent and highly Self-Critical women perceived people's lives as characterized by much misfortune, failure, and unhappiness. Unexpectedly, Efficacy scores, which are negatively related to depression, were also associated with negative perceptions of people's lives in women. Among the men, overall depression was not related to perceptions of how frequently people succeed at specific, concrete life tasks, but depressed subjects perceived others as experiencing a low level of subjective well-being. Implications for the notion of a depressive negative bias toward the self are discussed.     

Characteristics of perceived electromagnetic hypersensitivity in the general population

Health problems evoked in the presence of electrical equipment is a concern, calling for better understanding for characteristics of electromagnetic hypersensitivity (EHS ) in the general population. The present study investigated demographics, lifestyle factors, frequency and duration, coping strategies, proportion meeting clinical criteria for intolerance attributed to electromagnetic fields (EMF ) and comorbidity. Using data from a large‐scale population‐based questionnaire study, we investigated persons with self‐reported (n = 91) EHS in comparison to referents (n = 3,250). Middle age, female sex and poor perceived health was found to be associated with EHS . More than 50% in the EHS group reported having EMF ‐related symptoms more often than once a week, and the mean number of years experiencing EHS was 10.5. More than half of the EHS group reported that their symptoms started after a high‐dose or long‐term EMF exposure, that they actively tried to avoid EMF sources and that they mostly could affect the EMF environment. A minority of the EHS group had sought medical attention, been diagnosed by a physician or received treatment. Exhaustion syndrome, anxiety disorder, back/joint/muscle disorder, depression, functional somatic syndrome and migraine were comorbid with EHS . The results provide ground for future study of these characteristic features being risk factors for development of EHS and or consequences of EHS .     

Difference between prisoners and the general population in psychometric g

White and black prison inmates differ psychometrically from the general population mainly on the g factor of the Wechsler Adult Intelligence Scale-Revised. The average white-black difference is also predominantly a difference in g, although the groups also differ in spatial ability independently of g. The higher Performance than Verbal subtest scores typically found in criminal offenders is a relatively weak effect when g is removed.     

Autistic features in the general population: Implications for sensing purpose in life

Purpose in life has been discussed as a psychosocial process in which individuals construct their life aims in relation to other people. Consequently, difficulty attending to social cues could limit the extent to which individuals feel purposeful. The present study (N = 252) examined links between subclinical autistic features found in the general population and perceived purpose in life. Results showed that autistic features were negatively associated with purpose even after accounting for age, gender, positive mood, and dispositions in Big 5 personality traits. Findings are discussed in terms of directions for future research aimed at elucidating the mechanisms that may explain the observed associations. In completing this study, it is hoped that the present findings can be utilized as groundwork for the investigation of psychosocial development in special populations.     

Evidence for a general category of oblique orientations in four-month-old infants

Recent work on orientation perception and memory in infants suggest that oblique stimulus orientations are treated as members of a category. The two studies in this report support this hypothesis and extend previous findings by demonstrating that this category includes obliques on either side of vertical even when infants are previously exposed to obliques on only one side.     

Emotion-recognition abilities and behavior problem dimensions in preschoolers: Evidence for a specific role for childhood hyperactivity

Facial emotion-recognition difficulties have been reported in school-aged children with behavior problems; little is known, however, about either this association in preschool children or with regard to vocal emotion recognition. The current study explored the association between facial and vocal emotion recognition and behavior problems in a sample of 3 to 6-year-old children. A sample of 57 children enriched for risk of behavior problems (41 were recruited from the general population while 16 had been referred for behavior problems to local clinics) were each presented with a series of vocal and facial stimuli expressing different emotions (i.e., angry, happy, and sad) of low and high intensity. Parents rated children’s externalizing and internalizing behavior problems. Vocal and facial emotion recognition accuracy was negatively correlated with externalizing but not internalizing behavior problems independent of emotion type. The effects with the externalizing domain were independently associated with hyperactivity rather than conduct problems. The results highlight the importance of using vocal as well as facial stimuli when studying the relationship between emotion-recognition and behavior problems. Future studies should test the hypothesis that difficulties in responding to adult instructions and commands seen in children with attention deficit/hyperactivity disorder (ADHD) may be due to deficits in the processing of vocal emotions.     

Visual search for dimensionally redundant pop-out targets: Evidence for parallel-coactive processing of dimensions

In two visual search experiments, the detection of singleton feature targets redundantly defined on multiple dimensions was investigated. Targets differed from the distractors in orientation, color, or both (redundant targets). In Experiment 1, the various target types were presented either in separate blocks or in random order within blocks. Reaction times to redundant targets significantly violated therace model inequality (Miller, 1982), but only when there was constancy of the target-defining dimension(s) within trial blocks. In Experiment 2, there was dimensional variability within blocks. Consistent with Experiment 1, constancy of the target-defining dimension(s), but this time across successive trials (rather than within blocks), was critical for observing violations of the race model inequality. These results provide evidence for parallel-coactive processing of multiple dimensions, consistent with thedimension-weighting account of Müller, Heller, and Ziegler (1995).     

Intervention effects and relative variation as dimensions in experts' use of visual inference

Recent research indicates that when analyzing graphically presented single-subject data, subjects trained in visual inference appear to attend to large changes between phases regardless of relative variation and do not differentiate among common intervention effect patterns. In this follow-up study, experts in applied behavior analysis completed a free-sort task designed to assess the effects of these dimensions on their use of visual inference. The results indicate that they tended to differentiate among common intervention effect patterns but did not attend to relative variation in the data.     

A general factor of personality: Evidence for the Big One in the five-factor model

Exploratory and confirmatory factor analyses using different personality measures in three samples confirmed the existence of general factor of personality (The Big One) within the five-factor model. The Big One is characterized by high versus low Emotional Stability, Conscientiousness, Agreeableness, Extraversion, and Openness, and by high versus low higher-order factors of personality, Stability, and Plasticity. A comprehensive theoretical model of personality structure was therefore proposed with the Big One at the highest level of the hierarchy. The Big One was interpreted as a basic personality disposition that integrates the most general non-cognitive dimensions of personality. It is associated with social desirability, emotionality, motivation, well-being, satisfaction with life, and self-esteem. It also may have deep biological roots, evolutionary, genetic, and neurophysiological.