A population-based 2-year longitudinal study of insomnia disorder in a Chinese population in Hong Kong

There is a paucity of literature examining the longitudinal course of insomnia using standardized diagnostic criteria. This study aims to evaluate the persistence, remission, relapse, and incidence rates of insomnia symptoms and insomnia disorders according to the Diagnostic and Statistical Manual of Mental Disorders, 4th and 5th edition (DSM-IV and DSM-5). A total of 398 community dwellers were interviewed annually over two years using the Brief Insomnia Questionnaire, a validated questionnaire for deriving insomnia diagnoses. Normal sleepers were defined according to the DSM-5 quantitative criteria as having insomnia symptoms at most twice per week. Estimates were weighted against population age and sex distribution. Persistence for two consecutive years was 26.3, 26.4, and 23.0% for insomnia symptoms, DSM-IV, and DSM-5 insomnia disorders; remission rate was 55.8, 22.9, and 26.1%, relapse rate was 21.8, 1.3, and 0%, while incidence rate was 62.4, 19.6, and 4.5%. The common trajectories for DSM-IV insomnia disorder were to remain the same (26.4%), followed by a change to insomnia symptoms at the second year (25.7%), and at the third year (17.3%). For DSM-5 insomnia disorder, a change to insomnia symptoms at the second year was the commonest (28.3%), followed by continuing the same (23.0%), and a change to insomnia symptoms at the third year (14.0%). Over a two-year naturalistic follow-up, persistence of insomnia disorder was roughly 25%. Changes from insomnia disorder to insomnia symptoms were common; however, remission only occurred in about 25%, highlighting the chronic course of insomnia, perhaps due to a lack of treatment, under-treatment, or resistance to treatment. Incidence of insomnia symptoms was 62.4%, suggesting a high risk of developing insomnia in the general population.     

Cognitive bias modification as a strategy to reduce children's fears and concerns about the secondary school transition

Background and objectives: Cognitive Bias Modification of Interpretations (CBM-I) has emerged as an anxiety-reducing tool for children and adolescents, targeting maladaptive interpretations of everyday situations. This literature falls short of addressing whether the effects of CBM-I extend to worries about a real-life stressor, such as a school transition. Design: The study comprised a between-groups design comparing the effects of CBM-I to an active control (AC) intervention in children. Method: We recruited 38 children within two months of their primary–secondary school transition and investigated the capacity for multi-session, parent-administered CBM-I, compared to an AC condition, to modify cognitive style and reduce anxiety symptoms and school concerns. Results: While benign interpretations increased significantly and negative interpretations tended to decrease following CBM-I, both interventions significantly reduced anxiety symptoms and school concerns. Conclusions: These findings indicate that anxiety-reducing effects of CBM-I in children extend to a real life stressful event, but that equivalent anxiety reduction may be achieved through exposure to potentially worrying situations and parent–child interaction in the absence of bias modification.     

A Preliminary Examination of Motivating Operation and Reinforcer Class Interaction

The interaction effects between motivating operations and reinforcer classes were evaluated using a superordinate multielement design. Two individuals with developmental disabilities participated. Participants were exposed to a motivating operation condition—pre‐session access until rejection or pre‐session restriction for 24 h—followed by a reinforcer assessment, in which the reinforcer response requirements progressively increased. Reinforcers, stimuli representative of primary, conditioned, and token reinforcers, were available on alternating sessions. The results showed that pre‐session access and restriction produced reliable evocative and abative effects across reinforcer classes. For one of the participants, the effectiveness of the motivating operation appeared to be influenced by the reinforcer class. The interaction effects between motivating operations and reinforcer classes are discussed. Copyright © 2015 John Wiley & Sons, Ltd.     

Perceived cultural importance and actual self-importance of values in cultural identification

Cross-cultural psychologists assume that core cultural values define to a large extent what a culture is. Typically, core values are identified through an actual self-importance approach, in which core values are those that members of the culture as a group strongly endorse. In this article, the authors propose a perceived cultural importance approach to identifying core values, in which core values are values that members of the culture as a group generally believe to be important in the culture. In 5 studies, the authors examine the utility of the perceived cultural importance approach. Results consistently showed that, compared with values of high actual self-importance, values of high perceived cultural importance play a more important role in cultural identification. These findings have important implications for conceptualizing and measuring cultures.     

Support vector machine for classification of walking conditions of persons after stroke with dropped foot

Walking with dropped foot represents a major gait disorder, which is observed in hemiparetic persons after stroke. This study explores the use of support vector machine (SVMs) to classify different walking conditions for hemiparetic subjects. Seven participants with dropped foot (category 4 of functional ambulatory category) walked in five different conditions: level ground, stair ascent, stair descent, upslope, and downslope. The kinematic data were measured by two portable sensor units, each comprising an accelerometer and gyroscope attached to the lower limb on the shank and foot segments. The overall classification accuracy of stair ascent, stair descent, and other walking conditions was 92.9% using input features from the sensor attached to the shank. It was further improved to 97.5% by adding two more inputs from the sensor attached to the foot. Stair ascent was also classified by the inputs from the foot sensor unit with 96% accuracy. The performance of an SVM was shown to be superior to that of other machine learning methods using artificial neural networks (ANN) and radial basis function neural networks (RBF). The results suggested that the SVM classification method could be applied as a tool for pathological gait analysis, pattern recognition, control signals in functional electrical stimulation (FES) and rehabilitation robot, as well as activity monitoring during rehabilitation of daily activities.     

What is the temperamental basis of humour like in China? A cross-national examination and validation of the standard version of the state–trait cheerfulness inventory

The State–Trait Cheerfulness Inventory–trait version (STCI-T60) consists of three dimensions of cheerfulness, seriousness, and bad mood integrated to measure the temperamental basis of the sense of humour. The present study replicated the three-dimensional factor structure of the STCI in China using 60 items consistent with other standard trait versions (e.g., English, Chilean-Spanish). Closer examination of associations between traits suggested bad mood showed curvilinear associations with both cheerfulness and seriousness, such that cheerfulness and bad mood were negatively associated for those low and average in trait bad mood but not for those with high trait bad mood. Seriousness was positively associated with bad mood at high levels of trait bad mood, but not at average or low levels of bad mood. Associations between the STCI traits and major personality dimensions, humour styles, and well-being were further examined. Cheerfulness and seriousness showed positive associations with satisfaction with life and emotional well-being (EWB) while bad mood showed a curvilinear association with EWB. Using multi-group confirmatory factor analyses, partial metric invariance was found between English and Chinese versions of the STCI-T60, but structural invariance was not observed. Implications based on the empirical literature in dialecticism and cross-cultural assessment were thoroughly discussed.     

Leadership as a Reflection of Who We Are: Social Identity,Media Portrayal,and Evaluations of Hillary Clinton in the 2016 U.S. Presidential Election

Sex Roles - The 2016 U.S. Presidential election presented a unique opportunity to study gender and leadership. Using the social identity theory of leadership (Hogg 2001) as a guiding...     

Gender Schema and Social Judgments: A Developmental Study of Children from Hong Kong

The purpose of the study was to examine inferences and judgments of gender schematic and aschematic children. Kindergarten, third grade, and sixth grade Hong Kong Chinese children (n = 196) were categorized into schematic and aschematic groups on the basis of their reaction times to gender-stereotypic and counterstereotypic items. The children were then asked to make several inferences and judgments about four male and female targets behaving gender-stereotypically or counterstereotypically. Both age and gender schematicity were related to the children's inferences. Older children and gender-schematic children relied more on individuating information and younger children relied more on the gender label. The results are discussed within the framework of gender-schema theories.     

Googling Politics: How Offloading Affects Voting and Political Knowledge

Studies suggest that individuals are less likely to process information they can easily look up. Instead of committing information to memory, they rely on the Internet to store information for them—a phenomenon known as “offloading.” We examine the effects of offloading on political knowledge and voting behavior. Using data from a 10-wave panel experiment designed to study information processing in two distinct information environments, we demonstrate that people whose environment is conducive to offloading learn more during an election campaign than individuals whose information environment is not conducive to offloading, even though they look at less information during the campaign. Individuals in the offloading condition also make better vote choices despite examining less information. These results suggest that offloading reduces cognitive load, thereby freeing up processing space in working memory, which can increase learning of information that is accessed, and improve decision-making.