Preference Measures Research Articles

South African occupational therapists' orthotic management of trigger finger and factors influencing their decision regarding splinting type

Background: Orthotic management of trigger finger refers to the use of splints to immobilise affected joints. The prevalence of trigger finger and the management and treatment practices utilised by occupational therapists for this affliction in South Africa, are not yet documented. Aim: To explore occupational therapists' orthotic management for clients with trigger finger in KwaZulu-Natal, and the factors influencing the therapists' decisions when prescribing orthoses. Methods: A quantitative cross-sectional study design was implemented with a sample size of 102 via a stratified random sampling approach. A survey questionnaire was administered. Data were coded using frequencies and then descriptively analysed using SPSS. Results: Findings indicated that trigger finger is common in clinical settings and the majority (99%) of the occupational therapists use splints when managing trigger finger and as a first line of treatment (69.9%). The joint-blocking splint is preferred by 96.6% of the participants with the MCP joint-blocking splint being favoured by 55.0%. The most considered factors when deciding on the splint type are clinical presentation (99.1%) and the client's occupation (92.4%), and the most preferred measures of the effectiveness of treatment are pain (97.1%) and range of motion (97%). Conclusion: The study has demonstrated that the inconsistencies noted in global research also apply in KwaZulu-Natal. Therefore, further investigation on the effectiveness of splinting and a guide on deciding on splint type as well as appropriate outcome measures, are necessary to ensure that cclients receive optimal care through evidence-informed practice. Implications for Practice: This study informs further understanding of the current assessment ptior to splinting and treatment practices that occupational therapist in the South African context provide for their clients with trigger-finger. The study demonstrates that irrespective of the participant's level of experience and their clinical settings, the considerations when deciding on splint types remain the same. The results are consistent with available literature, particularly with which splint type to use. However, the development for a guide regarding the orthotic management of trigger finger covering aspects like the splint regime and the recommendations of exercises is vital, as discrepancies emerged largely fro these areas. The type of exercises, stages at which they may be introduced, duration and requenccy should be considered for deeper engagement. the development of this protocol will ensure consistency of treatment and evidence-informed practice.

Explicit and Implicit Preference for Symmetry Across Object Categories

Symmetry affects aesthetic judgements, and it has been extensively studied at least for faces and abstract objects. We examined the role of bilateral symmetry on aesthetic judgements across different types of stimuli. It is important to test if symmetry is equally effective in the context of objects expected to be symmetrical, e.g., faces, and objects that are almost never symmetrical, e.g., landscapes. We used the following categories: angular shapes, smooth shapes, landscapes, flowers, female faces, and male faces. We selected these image categories considering their differing degrees of curvature, familiarity to the viewer, and tendency to be perceived as ensembles, as opposed to standalone objects. We also included blobs, manipulating landscapes into blurry tessellated patterns featuring patches of color, to remove familiarity while preserving the appearance of ensembles. For each item in these categories, images were modified to obtain perfect bilateral symmetry. We collected both explicit ratings and implicit measures of symmetry preference. For landscapes, there was a clear preference for the non-symmetrical (original) version. We observed a dissociation between explicit and implicit measures. Implicit measures demonstrated positive associations for all categories.

The fertility gap and economic freedom

AbstractThe difference between desired fertility and achieved fertility is called the fertility gap. This paper investigates the relationship between economic freedom and the fertility gap across the United States since greater economic freedom may empower individuals to choose work more compatible with their family goals. We test this hypothesis using individual measures of fertility preferences from a nationally representative survey of reproductive‐aged women (2020–2024) and find evidence that women are more likely to achieve their family goals in states with greater economic freedom. This effect is strongest when focusing on variation in labor market freedom.

Statewide Outbreak of Neisseria meningitidis Serogroup Y, Sequence Type 1466 - Virginia, 2022-2024.

Invasive meningococcal disease (IMD) is a severe illness that can have devastating effects; outbreaks are uncommon in the United States. Vaccination is the preferred control measure for IMD outbreaks when a defined population at risk (e.g., college students or persons experiencing homelessness) can be identified. In August 2022, the Virginia Department of Health (VDH) began investigating an IMD outbreak in Virginia's Eastern Health Planning Region, prompted by the detection of four confirmed cases within 8 weeks. Clinical isolates available from three cases were characterized as Neisseria meningitidis serogroup Y, sequence type 1466. A subsequent statewide investigation identified 36 genetically related cases, including seven deaths (case fatality rate=19.4%) as of March 1, 2024. A majority of patients (63.9%) were in an age group (30-60 years) not generally considered at increased risk for IMD; 78.0% were non-Hispanic Black or African American. No common exposures, affiliations, or risk factors were identified, and a defined population could not be identified for vaccination. VDH recommended quadrivalent (serogroups A, C, W, and Y) meningococcal conjugate vaccination of a subset of close contacts of patients based on IMD risk factors and age range similar to that of patients with identified cases. IMD outbreaks might affect populations without established IMD risk factors. Lack of a well-defined population at risk might prompt exploration of novel control strategies, such as selective vaccination of close contacts.

Correlation between postdialysis blood pressure assessed at different time points and home blood pressure monitoring

Abstract Background Hemodialysis patients undergo blood pressure (BP) measurements during the predialysis, intradialytic and postdialysis (POSBP) periods at the dialysis sessions. However, there is no consensus regarding the time point when POSBP measurement should be performed. Purpose This study investigated the relationship of POSBP measurements performed at different time points with home blood pressure monitoring (HBPM). Methods This prospective study included 98 long-term dialysis patients (67% men; age=59.4 ±17.7 years; 79% using antihypertensive medications). During one week, POSBP measurements were obtained in sitting patients by trained health staff using oscillometric BP monitors lodged in the dialysis machines at all dialysis sessions in three different periods: 1) immediately after the dialysis period ended (POSBP1); 2) after returning the patient's blood (POSBP2) and 3) after hemostasis of the fistula or catheter sealing (POSBP3). In the same week, HBPM was performed using validated devices and was calculated as the mean of BP measurements obtained on six consecutive days, comprising three readings in the morning and in the evening after at least 3 min of rest, before antihypertensive medications were taken, with the patients seated. Abnormal BP was defined as HBPM≥135/85 mmHg. Based on the optimal cut-point values derived from ROC curves analysis, we built cutoffs for POSBP1 (143/79 mmHg), POSBP2 (153/78 mmHg) and POSBP3 (151/80 mmHg) corresponding to HBPM values of 135/85 mmHg. Results The values of POSBP1, POSBP2, POSBP3 and HBPM were 138±21/72±13, 143±24/73±13, 142±22/72±13 and 128±19/76±13 mmHg, respectively. Systolic HBPM showed greater correlation with systolic POSBP3 (r=0.71), followed by POSBP1 (r=0.68), POSBP2 (r=0.67), while diastolic HBPM showed greater correlation with diastolic POSBP2 and POSBP3 (both r=0.56), followed by POSBP1 (r=0.49) (all p<0.05). The POSBP3 cutoff showed the highest association (odds ratio [95% CI]= 8.06 [3.21, 20.27]), accuracy (area under the curve [95% CI]= 0.74 [0.65, 0.83]) and concordance (kappa coefficient=0.47) to identify elevated BP at HBPM in comparison with the POSBP1 and POSBP2 cutoffs (Figure). Conclusion(s) POSBP3 exhibited the strongest correlation with HBPM and had the highest accuracy to detect elevated HBPM in dialysis patients and may be a potentially preferable POSBP measurement in clinical practice.

Picture communication symbols and voice symbols: iconicity and preference among healthy older adults in Taiwan

Purpose: Unaided (e.g., speech and gestures) and aided (e.g., symbol corpuses) communication modes facilitate older adults’ expression and comprehension. Adults aged 65 years and above constituted 18.27% of Taiwan’s total population in 2023; hence, prioritizing high-quality healthcare for older adults becomes critical. Commercial symbol corpuses, such as Picture Communication Symbols (PCS) and Voice Symbols (VS), play a vital role in aiding older adults with expression and comprehension in Taiwan. Previous studies on iconicity and preference of symbol corpuses have primarily been conducted in Western and South Asian cultural communities. However, these findings may not apply to all Asian communities. Hence, studies investigating these aspects in specific communities are needed. Through quantitative nonexperimental observations, we explored the iconicity of and preference for PCS and VS among 30 healthy older adults in Taiwan. Materials and Methods: A total of 12 practice words and test words each, familiar to the participants and socially and culturally validated, were selected for the developed VS–PCS iconicity and preference measurement. Verbal choices were made to select one line drawing in both measurements. Results & Conclusions: The findings revealed that VS is significantly more transparent and preferred than PCS. Accounting for the iconicity of and preferences for symbol corpuses is pivotal for symbol selection.

Second Victims Among Austrian Nurses (SeViD-A2 Study).

Background: The Second Victim Phenomenon (SVP) significantly impacts the well-being of healthcare professionals and patient safety. While the SVP has been explored in various healthcare settings, there are limited data on its prevalence and associated factors among nurses in Austria. This study investigates the prevalence, symptomatology, and preferred support measures for SVP among Austrian nurses. Methods: A nationwide, cross-sectional, anonymous online survey was conducted September to December 2023 using the SeViD questionnaire (Second Victims in German-speaking Countries), which includes the Big Five Inventory-10 (BFI-10). Statistical analyses included binary logistic regression and multiple linear regression using the bias-corrected and accelerated (BCa) bootstrapping method based on 5000 bootstrap samples. Results: A total of 928 participants responded to the questionnaire with a response rate of 15.47%. The participants were on average 42.42 years old and were mainly women (79.63%). Among the respondents, 81.58% (744/912) identified as Second Victims (SVs). The primary cause of becoming an SV was aggressive behavior from patients or relatives. Females reported a higher symptom load than males, and higher agreeableness was linked to increased symptom severity. Notably, 92.47% of SVs who sought help preferred support from colleagues, and the most pronounced desire among participants was to process the event for better understanding. Conclusions: The prevalence of SVP among Austrian nurses is alarmingly high, with aggressive behavior identified as a significant trigger. The findings emphasize the necessity for tailored support strategies, including peer support and systematic organizational interventions to mitigate the impact of SVP on nurses and to improve overall patient care. Further research should focus on developing and implementing effective prevention and intervention programs for healthcare professionals in similar settings.

Leadership Preferences, Minimum Acceptable Nationalist Demands, and Duration of Ethno-territorial Civil Wars

In standard conflict bargaining models, internal ethno-territorial dispute outcomes should be influenced not only by status quo conditions and relative military power, but also by leadership preferences. Since direct, large-sample measures of leadership preferences on both sides of conflicts have not hitherto been available, statistical research typically diverges from case study research in omitting leadership preferences. This paper utilizes a database that measures the ideological nationalist dimension of variation in state and ethnic minority group leadership preferences by examining and ranking leaders’ minimum acceptable nationalist demands. Controlling for the impact of other factors, more extreme minimum nationalist demands, on both the state and the rebel group sides, are robust predictors of longer war duration.

Possibilities of music preferences measures in younger school age children

The musical-preference framework of a child at younger school age is gradually formed and shaped. The study outlined the possibilities of measuring musical taste at a younger school age and draws attention to the real specifics that this entails. We verified the newly created instrument - Musical Preference Questionnaire of Younger Pupils - MPQ-YP on 84 pupils (n=84) aged from 6 to 10 years (Mage=8.23). The 3-factor solution, which divides MPQ-YP into 3 categories of music genres - reflective and unconventional music; energetic and rhythmic music; optimistic and complex music, turned aout to be satisfactory. Psychometric properties are adequate, MPQ-YP seems to be sufficiently valid (construct and content validity) and reliable (measure of internal consistency and split-half reliability). Pilot descriptive results of younger schoolchildren's musical taste provide information about recognized musical genres and their preferences. The findings can be applied to the practice of music educators, music philetics and music therapists.

Patients with low prognosis in ART: a Delphi consensus to identify potential clinical implications and measure the impact of POSEIDON criteria

BackgroundCurrently, there is no consensus on the optimal management of women with low prognosis in ART. In this Delphi consensus, a panel of international experts provided real-world clinical perspectives on a series of literature-supported consensus statements regarding the overall relevance of the POSEIDON criteria for women with low prognosis in ART.MethodsUsing a Delphi-consensus framework, twelve experts plus two Scientific Coordinators discussed and amended statements and supporting references proposed by the Scientific Coordinators (Round 1). Statements were distributed via an online survey to an extended panel of 53 experts, of whom 36 who voted anonymously on their level of agreement or disagreement with each statement using a six-point Likert-type scale (1 = Absolutely agree; 2 = More than agree; 3 = Agree; 4 = Disagree; 5 = More than disagree; 6 = Absolutely disagree) (Round 2). Consensus was reached if > 66% of participants agreed or disagreed.ResultsThe extended panel voted on seventeen statements and subcategorized them according to relevance. All but one statement reached consensus during the first round; the remaining statement reached consensus after rewording. Statements were categorized according to impact, low-prognosis validation, outcomes and patient management. The POSEIDON criteria are timely and clinically sound. The preferred success measure is cumulative live birth and key management strategies include the use of recombinant FSH preparations, supplementation with r-hLH, dose increases and oocyte/embryo accumulation through vitrification. Tools such as the ART Calculator and Follicle-to-Oocyte Index may be considered. Validation data from large, prospective studies in each POSEIDON group are now needed to corroborate existing retrospective data.ConclusionsThis Delphi consensus provides an overview of expert opinion on the clinical implications of the POSEIDON criteria for women with low prognosis to ovarian stimulation.

The effects and mechanism of discounting unit price

PurposeSupermarket promotions typically use a standard label, which displays the regular price, discounted price and discounted unit price. Visits to supermarkets across multiple countries found that none used a price label that also contains the regular (i.e. pre-discounted) unit price. This study aims to investigate the effectiveness of a dual unit-price label that includes the regular unit price as a reference price, and what underpins its efficacy in enhancing promotion attractiveness.Design/methodology/approachThe authors executed four studies, supported by three supplemental studies. Study 1 established external validity through a natural instore experiment. Studies 2 and 3 tested the dual unit-price label with different pack sizes and assortment sizes, respectively. Finally, Study 4 tested the underpinning mechanism of the efficacy of the dual unit-price label.FindingsIn Study 1, daily sales records over four weeks showed that dual unit-price label promotions had larger sales volume than standard-label promotions. Study 2 showed a larger pack size, a heuristic cue for greater economy and increased preference for dual unit-price label promotions. Study 3 similarly found that the dual unit-price label was preferred more as cognitive load was increased by assortment size. Finally, Study 4 demonstrated the dual processing of the dual unit-price label, using a conscious preference measure (information provided) and an unconscious implicit attitude test.Research limitations/implicationsUnit-price research has mainly considered a cognitive process. The authors demonstrated the importance of considering a heuristic process.Practical implicationsSupermarkets can use this simple and yet effective tool to improve promotion effectiveness.Originality/valueThis study demonstrates that the dual unit-price label is a new and easy tool to enhance sales promotions, which academic research and managerial practice had never considered previously.

Smartphone app-based approximation of time spent with atrial fibrillation and symptoms in patients after catheter ablation: Data from the TeleCheck-AF project.

Reduction of atrial fibrillation (AF) burden is the preferred outcome measure over categorical AF rhythm recurrence after AF ablation. In this sub-analysis of the TeleCheck-AF project we tested the feasibility of smartphone app-based approximation of time spent with AF and/or symptoms. Patients scheduled for at least one teleconsultation during the 12-month follow-up after AF ablation were instructed to use a smartphone photoplethysmography (PPG)-based application for simultaneous symptom and rhythm monitoring 3-times daily for 1 week. Proxies of time spent with AF and/or symptoms (%-recordings, load, %-days), temporal aggregation of AF and/or symptoms (density), and symptom-rhythm correlation (SRC) were assessed. In total 484 patients (60% male, 62±9.9 years) were included. Adherence, motivation and patient satisfaction were high. %AF-recordings, AF load and %AF-days (rs= 0.88-0.95) and %symptom-recordings, symptom load, %symptom-days (rs= 0.95-0.98) showed positive correlations. The SRC correlated negatively with time spent with symptoms (rs=-0.65--0.90) and with time spent with AF (rs=-0.31--0.34). In patients with paroxysmal AF before ablation and AF during the monitoring period, 87% (n=39/44) had a low-density score <50% ("paroxysmal AF pattern") while 5% (n=2/44) had a high-density score >90% ("persistent AF pattern"). Corresponding numbers for patients with persistent AF before ablation were 48% (n=11/23) and 43% (n=10/23), respectively. On-demand, app-based simultaneous rhythm and symptom assessment provides objective proxies of time spent with AF and/or symptoms and symptom-rhythm correlation, which may assist in assessing AF and symptom outcomes after AF ablation.

Non-pharmacological interventions for reducing dental anxiety in pediatric dentistry: a network meta-analysis

BackgroundChild dental anxiety is a prevalent issue in the field of pediatric dentistry. At present, several non-pharmacological interventions are employed to mitigate anxiety during dental treatments for children. The objective of this study is to assess the effectiveness of diverse non-pharmacological interventions in reducing dental anxiety, as well as enhancing heart rate during pediatric dental treatments. To achieve this, we conducted a systematic review and a network meta-analysis (NMA) to compare the efficacy of various outcome indicators.MethodsA thorough search was conducted in the databases of PubMed, Embase, Web of Science, Cochrane Library, Scopus, APA PsycInfo, CINAHL, and AMED to identify all eligible randomized controlled trials (RCTs) from the beginning of the databases up to August 1, 2024. The quality assessment was carried out using the Cochrane Collaboration’s bias risk tool. The two outcome measures under consideration were dental anxiety and heart rate. Network graphs, league tables and SUCRA were constructed using R 4.2.3 software and Stata 16 software. This study is registered in PROSPERO under the registration number CRD42023467610.ResultsThe study examined 12 different non-pharmacological approaches, drawing from a pool of 61 research studies involving 6,113 participants aged 4 to 16 years. The results of the network meta-analysis revealed that music (SUCRAs: 93.60%) proved to be the most effective measure in mitigating dental anxiety, followed by aromatherapy (SUCRAs: 78.58%) and game (SUCRAs: 70.99%). Moreover, hypnosis (SUCRAs: 98.80%), music (SUCRAs: 79.58%), and relaxation (SUCRAs: 72.41%) were identified as the top three interventions for decreasing heart rate.ConclusionIn this NMA, when contemplating dental anxiety outcomes, music is recommended as a priority. For heart rate outcomes, hypnosis may be a preferred measure. However, owing to the limited number of articles, the conclusion of this study still requires additional confirmation or correction through more high-quality primary studies in the future.

Lipoprotein(a) and risk-weighted apolipoprotein B: a novel metric for atherogenic risk

BackgroundRetention of apolipoprotein B (apoB)-containing lipoproteins within the arterial wall plays a major causal role in atherosclerotic cardiovascular disease (ASCVD). There is a single apoB molecule in all apoB-containing lipoproteins. Therefore, quantitation of apoB directly estimates the number of atherogenic particles in plasma. ApoB is the preferred measurement to refine the estimate of ASCVD risk. Low-density lipoprotein (LDL) particles are by far the most abundant apoB-containing particles. In patients with elevated lipoprotein(a) (Lp(a)), apoB may considerably underestimate risk because Mendelian randomization studies have shown that the atherogenicity of Lp(a) is approximately 7-fold greater than that of LDL on a per apoB particle basis. In subjects with increased Lp(a), the association between LDL-cholesterol and incident CHD (coronary heart disease) is increased, but the association between apoB and incident CHD is diminished or even lost. Thus, there is a need to understand the mechanisms of Lp(a), LDL-cholesterol and apoB-related CHD risk and to provide clinicians with a simple practical tool to address these complex and variable relationships. How can we understand a patient’s overall lipid-driven atherogenic risk? What proportion of this risk does apoB capture? What proportion of this risk do Lp(a) particles carry? To answer these questions, we created a novel metric of atherogenic risk: risk-weighted apolipoprotein B.MethodsIn nmol/L: Risk-weighted apoB = apoB - Lp(a) + Lp(a) x 7 = apoB + Lp(a) x 6. Proportion of risk captured by apoB = apoB divided by risk-weighted apoB. Proportion of risk carried by Lp(a) = Lp(a) × 7 divided by risk-weighted apoB.ResultsRisk-weighted apoB agrees with risk estimation from large epidemiological studies and from several Mendelian randomization studies.ConclusionsApoB considerably underestimates risk in individuals with high Lp(a) levels. The association between apoB and incident CHD is diminished or even lost. These phenomena can be overcome and explained by risk-weighted apoB.

Critical Success Factors for Adopting Corporate Social Responsibility in the Malaysian Hotel Industry

Corporate social responsibility (CSR) is becoming more highly regarded in the hotel sector as a strong weapon in promoting sustainable economic development and addressing ethical concerns. Nevertheless, there is a limited knowledge of the notion of CSR in the hotel business, as well as how to effectively implement it. This study seeks to understand the views and recommendations of experts regarding the key elements of that are essential for the effective implementation of CSR in the hotel industry. This study uses the NGT method as the main method of the study. A panel of ten highly skilled Malaysian industry practitioners and academics was convened. The data were descriptively collected and analyzed, and they were weighted according to ranking (1-3, lowest to highest priority) of domain. The rationale for the choices were analyzed thematically. The domain of "financial resources," "top management support," "employees’ education and training on CSR," and " managerial or internal skills on CSR” was recommended as the preferred measure of time period over which the domains were rated. The adoption of these recommendations will help standardize approaches to improving the CSR practices particularly in the Malaysian hotels.

The role of gene–environment interaction in the formation of risk attitudes

Understanding the formation of risk preferences is crucial for elucidating the roots of economic, social, and health inequalities. However, this area remains inadequately explored. This study employs a risk preference measure directly linked to the labor market to examine whether previous experiences with high unemployment rates influence current risk decision-making among the elderly, and whether this impact varies by genotype. The findings indicate that individuals with low genetic predispositions for risk tolerance are more significantly influenced by historical fluctuations in unemployment rates than those with high genetic predispositions for risk tolerance. Consequently, this paper identifies genetic endowment as a crucial moderating factor that shapes how past experiences impact current decision-making processes. This disparity in how past experiences shape risk preferences based on genetic predisposition may further amplify inequalities in health, wealth, income, and other outcomes associated with risk preferences.

Strategies for Assessing Autistic-Like Behaviors in Mice.

Autism spectrum disorder (ASD) is a neurobiologically complex condition with a heterogeneous genetic etiology. Clinically, ASD is diagnosed by social communication impairments and restrictive or repetitive behaviors, such as hand flapping or lining up objects. These behavioral patterns can be reliably observed in mouse models with ASD-linked genetic mutations, making them highly useful tools for studying the underlying cellular and molecular mechanisms in ASD. Understanding how genetic changes affect the neurobiology and behaviors observed in ASD will facilitate the development of novel targeted therapeutic compounds to ameliorate core behavioral impairments. Our lab has employed several protocols encompassing well-described training and testing procedures that reflect a wide range of behavioral deficits related to ASD. Here, we detail two assays to study the core features of ASD in mouse models: self-grooming (a measure of repetitive behavior) and the three-chamber social interaction test (a measure of social interaction approach and preference for social novelty).

Security awareness, decision style, knowledge, and phishing email detection: Moderated mediation analyses

This study examines whether the negative relationship between email information security awareness and phishing email susceptibility is mediated by less intuitive decision-making when assessing emails, and whether this relationship is moderated by phishing email knowledge. Participants (N = 291) completed an online email sorting task, a measure of email use information security awareness, a measure of preference for intuitive decision-making with emails, and a measure of phishing email knowledge. Moderated mediation analyses indicated that information security awareness predicted positive behavioural intentions directly and indirectly through lower preference for intuitive decision-making, and these relationships were stronger when phishing email knowledge was lower. Further, both the direct and indirect relationships between information security awareness and sensitivity through intuitive decision styles were moderated by phishing email knowledge, with information security awareness positively predicting ability to discriminate phishing from genuine emails when phishing knowledge was average or high but not low. These findings suggest that in the absence of phishing knowledge, information security awareness and less intuitive decision styles reduce susceptibility to phishing attacks through increased caution. Further, the findings provide strong support for the proposition that some level of phishing knowledge is required before email security behaviours and decision-making processes aid in the detection of phishing emails. From an applied perspective, the outcomes suggest that focusing on a combination of awareness, knowledge, and decision-making processes could increase the effectiveness of anti-phishing and cybersecurity training programs.

On the opposition to market institutions on moral grounds

From a liberal viewpoint, voluntary trade appears to be something that should meet universal approval. If no one is obliged to trade, establishing a market institution could only make all better off. Nonetheless, specific market institutions meet substantial skepticism and criticism. This paper extends the extant literature by surveying the moral opposition towards trade in multiple dimensions and linking this to policy support measures. We provide survey results on moral opposition to trade in organs, sex services, surrogate mothers, trade in carbon permits, goods produced in poor countries, and food from countries where people suffer from hunger. These cover the potential reasons for opposing trade institutions: moral concerns, paternalism regarding risk-taking, and distributional concerns. Beyond this, we measure support for policies on unemployment benefits, risk prevention, equality goals within society, and redistribution. The survey of Amazon Mechanical Turk workers from the U.S. reveals significant moral opposition to trade in diverse dimensions. About a third of the participants strongly oppose trade in body items, sex services, and food imports from countries where a large proportion of the population suffers from hunger and malnutrition. Fewer participants strongly oppose trading CO2 permits, importing from developing countries, or allowing surrogate mothership. Besides other correlates (e.g., gender, education, being conservative), individuals’ attitudes towards imposing risks on others are identified as an important correlate of the opposition to trade for all the contexts of trade: those who are averse to exposing others to risk for their own advantage are more likely to oppose trading institutions. This measure of social preferences also relates to support for policies on risk prevention, equality goals within society, and redistribution. We discuss potential mechanisms behind this explanatory power of the newly identified measure.

Seismic performance assessment of high arch dams considering the pulse-like and directionality effects of near-fault ground motions

This paper investigates the pulse-like and directionality effects of near-fault horizontal ground-motion records on the seismic performance of high arch dams. A 3-dimensional arch dam-reservoir-foundation finite-element model is built. Two near-fault bidirectional ground-motion suites (i.e. ordinary and pulse-like suite) are collected. The fault-normal and fault-parallel orientations of the horizontal ground-motion records are rotated to reflect the directionality effect. Nonlinear dynamic analyses are further implemented for the high arch dam excited by both near-fault ground motions with different incidence angles. The results show that the pulse-containing ground-motion records can yield more notable dynamic response and damage for high arch dams as compared to the ordinary records. Moreover, with changing the incidence angles, both the dam dynamic response and damage metrics exhibit periodic variation and constant trends for the pulse-containing and ordinary ground-motion cases, respectively. Therefore, the directionality effect has a significant influence on the seismic performance of high arch dams excited by pulse-containing ground-motion records. Compared with the near-fault ordinary ground motions, the pulse-like ground motions will induce a 40 %-increase in the concrete damage volume of high arch dams. In addition, peak ground velocity could be regarded as a preferable intensity measure for assessing the seismic damage of high arch dams.