Clinical Commentary

Abstract

This paper is the narrative of a first-time father with a son born seven weeks early by Caesarean section. Against the anxiety and trauma of his infant's birth and his wife's illness, another inner darker drama is being relived. Michael shows all the wounds of a battered child. He asks two awesome questions - Will I be to my son as my father was to me? Will my son be to me as I was to my father? Fearful and at first unvoiced questions, the developing interviews gave them a voice. We respected Michael's sharing of the early and fearful days and nights when his infant first came home. We sometimes found it hard to empathize with his running away to hide in work, until we understood what he was hiding from. Most poignant was his struggle with his anger and hurt with his father and his desire to understand, ‘Why?’, so that he would not be like this to his son. We saw a sensitive revelation of life being born inside him anew, as he made contact with his real infant and his psychic infant within. Of particular interest was the therapeutic use of the research interview space and the interviewer.     

An Evaluation of Equivalence in Body Dissatisfaction Measurement Across Cultures

We evaluated gender-based and cross-cultural equivalence of the Body Dissatisfaction Scale of the Body Change Inventory in a sample of 4,005 adolescents from 7 cultures that represent diverse body image ideals and response styles. Results of multigroup confirmatory factor analyses demonstrated equivalence of the scale across gender but not across cultures. Follow-up analyses identified small but significant cross-cultural differences in response styles (specifically, acquiescence and middle response option endorsement) as the source of this noninvariance. We recommend use of this scale for gender-based comparisons but caution that researchers should evaluate the presence of response biases before making substantive conclusions about cross-cultural differences in body dissatisfaction.     

A Comparison of Passive–Aggressive and Negativistic Personality Disorders

Passive–aggressive personality disorder (PAPD) has historically played an important role in clinical theorizing and was diagnosable prior to the Diagnostic and Statistical Manual of Mental Disorders (4th ed. [DSM–IV]; American Psychiatric Association, 1994), in which the construct was relabeled negativistic (NEGPD), expanded to include negative affective symptoms, and appendicized. In this study we tested the hypothesis that the expansion of PAPD to include content related to negative moods and nonspecific personality pathology compromised its discriminant validity. In an undergraduate sample (N = 1,215), a self-report measure of PAPD was only moderately related to NEGPD and showed less diagnostic overlap with other personality disorders than NEGPD. Furthermore, a conjoint factor analysis yielded a strong first factor (moodiness) that appeared less specific to passive–aggressive behavior than 3 other factors (irresponsibility, inadequacy, and contempt). We conclude that future research on this potentially important clinical construct should focus on core passive–aggressive features and abandon the negativistic content that has been added to it in successive editions of the DSM.     

Integrating Methods to Optimize Circumplex Description and Comparison of Groups

The ‘self-steering behaviour’ syndrome, as measured by the barrier index of the body image boundary, was investigated as a predictor of level of adjustment to stress induced by physical-disability. Rorschach blots were administered to three groups of 24, randomly selected subjects differing in degree of disability, and Barrier scores were derived according to the Fisher and Cleveland technique. It was hypothesized that Barrier score would significantly discriminate between levels of adjustment and degrees of disability, but the results did not support these hypotheses. Results indicated that ‘self-steering behaviour’ as indexed by Barrier score is not a valid technique for predicting typical behavioural patterns of reaction to disability-stress.     

Lower limb kinematic variability in dancers performing drop landings onto floor surfaces with varied mechanical properties

Elite dancers perform highly skilled and consistent movements. These movements require effective regulation of the intrinsic and extrinsic forces acting within and on the body. Customized, compliant floors typically used in dance are assumed to enhance dance performance and reduce injury risk by dampening ground reaction forces during tasks such as landings. As floor compliance can affect the extrinsic forces applied to the body, secondary effects of floor properties may be observed in the movement consistency or kinematic variability exhibited during dance performance. The aim of this study was to investigate the effects of floor mechanical properties on lower extremity kinematic variability in dancers performing landing tasks. A vector coding technique was used to analyze sagittal plane knee and ankle joint kinematic variability, in a cohort of 12 pre-professional dancers, through discrete phases of drop landings from a height of 0.2 m. No effect on kinematic variability was observed between floors, indicating that dancers could accommodate the changing extrinsic floor conditions. Future research may consider repeat analysis under more dynamic task constraints with a less experienced cohort. However, knee/ankle joint kinematic variability was observed to increase late in the landing phase which was predominantly comprised of knee flexion coupled with the terminal range of ankle dorsiflexion. These findings may be the result of greater neural input late in the landing phase as opposed to the suggested passive mechanical interaction of the foot and ankle complex at initial contact with a floor. Analysis of joint coordination in discrete movement phases may be of benefit in identifying intrinsic sources of variability in dynamic tasks that involve multiple movement phases.     

Close women,distant men: Line bisection reveals sex‐dimorphic patterns of visuomotor performance in near and far space

The mid‐points of a series of lines which were positioned both within hand‐reach (near space) and beyond hand‐reach (far space) were estimated by 24 women and 24 men. When using a laser pointer to perform estimations, women were more accurate in the near condition than the far, whereas men were more accurate in the far condition than the near. When using a stick pointer for the far condition, women were more accurate than when using the laser, whereas men were more accurate using the laser pointer than the stick for the far condition. There was no difference between near and far accuracy scores for either sex using the stick. These results suggest that use of a tool which provides proprioceptive feedback causes the brain to remap far‐space stimuli as if situated in near space. Possible origins and neural bases for these differences are considered. Finally, the study found evidence for pseudoneglect, but no evidence for pseudoneglect shift.     

Identity moderates the effects of Christmas displays on mood, self-esteem, and inclusion

In two experiments we examined the differential psychological consequences of being in the presence of a Christmas display on participants who did or did not celebrate Christmas (Study 1), or who identified as Christian, Buddhist, or Sikh (Study 2). Participants completed measures of psychological well-being in a cubicle that either did or did not contain a small Christmas display. Across several indicators of well-being, the display harmed non-celebrators and non-Christians, but enhanced well-being for celebrators and Christians. In Study 2, we found that the negative effect of the display on non-Christians was mediated by reduced feelings of inclusion. The results raise concerns about the ubiquitous presence of dominant cultural symbols (such as Christmas displays) in culturally diverse societies.     

Measures of dynamic stability: Detecting differences between walking overground and on a compliant surface

Numerous measures of dynamic stability have been proposed to gauge fall risk in the elderly, including stride interval variability and variability of the center of mass. However, these measures have been deemed inadequate because they do not take into account temporal information. Therefore, research on the measurement of dynamic stability has turned to other analysis methods such as stride interval dynamics and the maximum Lyapunov exponent. Stride interval dynamics reflect the statistical persistence of an individual’s stride interval time series and the Lyapunov exponent quantifies local dynamic stability – the sensitivity of the system to infinitesimal perturbations. In this study, we compare the ability of these measurement tools to detect changes between overground and compliant-surface walking, a condition known to affect stability, to determine their aptness as measures of dynamic stability. Fourteen able-bodied participants completed three 15 min walks, two overground and one on a compliant surface. Our results show that the Lyapunov exponent may be more sensitive to gait changes than stride interval dynamics and gait variability measures.