Parkinson's disease differentially affects adaptation to gradual as compared to sudden visuomotor distortions

Patients with Parkinson’s disease (PD) have difficulties in movement adaptation to optimize performance in novel environmental contexts such as altered screen cursor-hand relationships. Prior studies have shown that the time course of the distortion differentially affects visuomotor adaptation to screen cursor rotations, suggesting separate mechanisms for gradual and sudden adaptation. Moreover, studies in human and non-human primates suggest that adaptation to sudden kinematic distortions may engage the basal ganglia, whereas adaptation to gradual kinematic distortions involves cerebellar structures. In the present studies, participants were patients with PD, who performed center-out pointing movements, using either a digitizer tablet and pen or a computer trackball, under normal or rotated screen cursor feedback conditions. The initial study tested patients with PD using a cross-over experimental design for adaptation to gradual as compared with sudden rotated hand-screen cursor relationships and revealed significant after-effects for the gradual adaptation task only. Consistent with these results, findings from a follow-up experiment using a trackball that required only small finger movements showed that patients with PD adapt better to gradual as against sudden perturbations, when compared to age-matched healthy controls. We conclude that Parkinson’s disease affects adaptation to sudden visuomotor distortions but spares adaptation to gradual distortions.     

Intolerance of Uncertainty and Anxiety Symptoms: Examining the Indirect Effect Through Anxiety Sensitivity Among Adults with Anxiety-Related Disorders

Journal of Psychopathology and Behavioral Assessment - The conceptual overlap between intolerance of uncertainty (IU) and anxiety sensitivity (AS) has gained recent attention, with researchers...     

Evaluating Reasoning in Natural Arguments: A Procedural Approach

Argumentation - In this paper, we formulate a procedure for assessing reasoning as it is expressed in natural arguments. The procedure is a specification of one of the three aspects of...     

Effects of Father-Adolescent and Mother-Adolescent Relationships on Depressive Symptoms among Chinese Early Adolescents

Parent–adolescent relationships play an important role in protecting adolescents from depressive symptoms. However, there are no consistent conclusions about the extent to which fathers and mothers uniquely contribute to adolescents’ depressive symptoms. The present study aimed to acquire knowledge in this research area in two ways. First, this study separated the potential impacts of father–child and mother–child relationships on depressive symptoms in Chinese adolescents. Second, this study used a longitudinal design with nationally representative samples from the China Education Panel Survey. A total of 8794 middle school students in grade 7 completed measures of father–adolescent and mother–adolescent relationships, and depressive symptoms twice (T1 and T2; one-year interval). Results indicated that both positive father–adolescent and mother–adolescent relationships had negative effects on depressive symptoms in female adolescents. However, positive father-adolescent, not mother-adolescent, relationships had a negative effect on depressive symptoms in male adolescents. These findings suggest that positive parent–adolescent relationships could reduce early adolescents’ depressive symptoms, but positive father–adolescent and mother–adolescent relationships might have different protective effects on early adolescents’ depressive symptoms among male and female adolescents in China.

     

Assessing Recall in Mothers’ Retrospective Reports: Concerns Over Children’s Speech and Language Development

Retrospective recall about children’s symptoms is used to establish early developmental patterns in clinical practice and is also utilised in child psychopathology research. Some studies have indicated that the accuracy of retrospective recall is influenced by life events. Our hypothesis was that an intervention: speech and language therapy, would adversely affect the accuracy of parent recall of early concerns about their child’s speech and language development. Mothers (n?=?5,390) reported on their child’s speech development (child male to female ratio = 50:50) when their children were aged 18 or 30 months, and also reported on these early concerns retrospectively, 10 years later, when their children were 13 years old. Overall reliability of retrospective recall was good, 86 % of respondents accurately recalling their earlier concerns. As hypothesised, however, the speech and language intervention was strongly associated with inaccurate retrospective recall about concerns in the early years (Relative Risk Ratio = 19.03; 95 % CI:14.78–24.48). Attendance at speech therapy was associated with increased recall of concerns that were not reported at the time. The study suggests caution is required when interpreting retrospective reports of abnormal child development as recall may be influenced by intervening events.     

ACOUSTIC ANALYSIS OF ORAL PRODUCTIONS OF INFANTS LATER DIAGNOSED WITH AUTISM AND THEIR MOTHER

Research on early signs of autism in social interactions often focuses on infants’ motor behaviors; few studies have focused on speech characteristics. This study examines infant‐directed speech of mothers of infants later diagnosed with autism (LDA; n = 12) or of typically developing infants (TD; n = 11) as well as infants’ productions (13 LDA, 13 TD). Since LDA infants appear to behave differently in the first months of life, it can affect the functioning of dyadic interactions, especially the first vocal productions, sensitive to expressiveness and emotions sharing. We assumed that in the first 6 months of life, prosodic characteristics (mean duration, mean pitch, and intonative contour types) will be different in dyads with autism. We extracted infants’ and mothers’ vocal productions from family home movies and analyzed the mean duration and pitch as well as the pitch contours in interactive episodes. Results show that mothers of LDA infants use relatively shorter productions as compared to mothers talking to TD infants. LDA infants’ productions are not different in duration or pitch, but they use less complex modulated productions (i.e., those with more than two melodic modulations) than do TD. Further studies should focus on developmental profiles in the first year, analyzing prosody monthly.     

Psychological Entitlement and Ambivalent Sexism: Understanding the Role of Entitlement in Predicting Two Forms of Sexism

Recent research has shown that narcissistic men in the United States express more ambivalent sexism than their non-narcissistic counterparts. The present study sought to extend these findings by hypothesizing that psychological entitlement would be a predictor of ambivalent sexism but that that this relationship may vary by gender. Given entitlement’s associations with hostility and aggression and the previously established link between narcissism and sexism in men, we hypothesized that entitlement would predict hostile sexism in men. Given that entitlement is characterized by a pervasive sense of deservingness for special treatment and goods, we expected that entitled women would endorse attitudes of benevolent sexism. These hypotheses were tested using two cross-sectional samples in the U.S.—a sample of undergraduates from a private university in the Midwest (N?=?333) and a web-based sample of adults across the U.S. (N?=?437). Results from regression analyses confirmed that psychological entitlement is a robust predictor of ambivalent sexism, above and beyond known predictors of sexism such as low openness and relevant covariates such as impression management. In addition, entitlement was a consistent predictor of benevolent sexism in women, but not in men, and a consistent predictor of hostile sexism in men, but not in women. These relationships were largely robust, persisting even when relevant covariates (e.g., socially desirable responding, trait openness) were controlled statistically, although in one sample the link between entitlement and hostile sexism in men was reduced to non-significance when benevolent sexism was controlled for statistically. Implications of these findings are discussed.     

What Can Feminist Epistemology Do for Surgery?

Surgery is an important part of contemporary health care, but currently much of surgery lacks a strong evidence base. Uptake of evidence‐based medicine (EBM) methods within surgical research and among practitioners has been slow compared with other areas of medicine. Although this is often viewed as arising from practical and cultural barriers, it also reflects a lack of epistemic fit between EBM research methods and surgical practice. In this paper we discuss some epistemic challenges in surgery relating to this lack of fit, and investigate how resources from feminist epistemology can help to characterize them. We point to ways in which these epistemic challenges may be addressed by gathering and disseminating evidence about what works in surgery using methods that are contextual, pluralistic, and sensitive to hierarchies.