Two-factor Model Research Articles

Factor Structure and Invariance of a German Adaptation of the Primary Levenson Self-Report Psychopathy Scale

Abstract: This study was conducted to test the psychometric properties of a German adaptation of the Primary Levenson Self-Report Psychopathy Scale (LSRP). A large community sample ( N = 1,040) was collected and divided into two parallel subsamples. One was used to explore the latent structure with a hierarchical cluster analysis, whereas the other subsample was used to test the structure with confirmatory factor analyses. A solution comprising two correlated factors offered the best model fit. The allocation of the three Machiavellianism items to the two factors differed from that found in previous studies and suggested an interpretation of the factors as egocentricity and deceitfulness. This revised measurement model with the refined item allocation possessed superior fit and reliability compared to one-factor and two-factor models that have previously been proposed for the Primary LSRP. Furthermore, the revised measurement model proved to be measurement invariant across male and female participants.

Optimization of serum samples derivatization process by I-Optimal Split-plot design of experiments for GC–MS metabolomics of inflammatory neuropathies

The derivatization process is critical in gas chromatography coupled to mass spectrometry-based untargeted metabolomics. This process aims to increase common non-volatile compounds’ vapor pressure and thermal stability by two sequential steps: methoximation and silylation. Up to now, there are no standardized conditions for performing these reactions. In this study, we simultaneously optimized these procedures using an I-Optimal Split-plot design in serum samples of healthy individuals. The resultant two-factor interaction model performed well with R2 > 0.90 and R2-adjusted > 0.70 in the statistical analysis. The results revealed interactions between methoximation and silylation conditions. The optimized conditions were applied for the GC–MS untargeted metabolomics analysis of serum samples of patients with inflammatory neuropathies and healthy controls. The orthogonal partial least square discriminant analysis with satisfactory cross-validation results (R2 = 0.744, Q2 = 0.557) determined 32 metabolites with VIP score > 1. Short- and long-chain organic acids, fatty acids, and carbohydrates were annotated as potential discriminative molecular markers.

Development and validation of the caregiver-report version of the international grief questionnaire (IGQ-CG): Results from a Ukrainian sample of parents.

The International Grief Questionnaire (IGQ) is a self-report measure of ICD-11 Prolonged Grief Disorder (PGD) in adults. This study sought to develop and validate a caregiver-report version of the IGQ for children and adolescents aged 7-17 years; the IGQ-Caregiver Version (IGQ-CG). 639 parents living in Ukraine provided data on themselves and one child in their household as part of the "The Mental Health of Parents and Children in Ukraine Study: 2023 Follow-up" study. The latent structure of the scale was tested using confirmatory factor analysis (CFA), while convergent validity was assessed through associations with other mental health correlates. Prevalence rates of probable ICD-11 PGD were estimated. CFA results supported a correlated two-factor model ('core' and 'associated' symptoms) and the internal reliability of the scale scores were acceptable. Convergent validity was supported through significant correlations with internalizing symptoms, while contact with the deceased, time since bereavement, and parental PGD were associated with higher scores on the IGQ-CG latent variables. The prevalence of probable ICD-11 PGD was 1.4%, and amongst those with a lifetime bereavement, the conditional rate was 3.2%. The IGQ-CG produces reliable and valid scores for ICD-11 PGD symptoms in children and adolescents as reported by their caregivers.

Persian version of the Short Health Anxiety Inventory (SHAI) for patients with cancer: Evaluation of psychometric properties, factor structure, and association with related constructs

ObjectiveThis study aims to evaluate the psychometric properties of the Short Health Anxiety Inventory (SHAI=short health anxiety inventory) in a sample of patients diagnosed with cancer. Factor structure, internal consistency, convergent validity, and gender differences in SHAI scores were assessed. Methods202 patients diagnosed with cancer participated, with 18 questionnaires excluded for incomplete data. Confirmatory Factor Analysis was conducted to confirm the factor structure. Internal consistency was also assessed using Cronbach's alpha. ResultsA two-factor model (thought intrusion and fear of illness) provided the best fit for the data (SBχ2 (64) = 114.346, p < 0.001, CFI = 0.944, GFI = 0.908, RMSEA = 0.065). Internal consistency was high for the SHAI total score (α = 0.864) and its subscales (thought intrusion: α = 0.753; fear of illness: α = 0.825). Female patients also scored significantly higher than male patients on the SHAI total score (U = 5232.500, p = 0.012), thought intrusion subscale (U = 5189.00, p = 0.008) and fear of illness subscale (U = 5069.500, p = 0.018). ConclusionThe SHAI demonstrates adequate psychometric properties for assessing health anxiety in cancer patients.

A full-factorial test of motivational and volitional intervention strategies for promoting exercise habit formation and exercise maintenance among new users of an online exercise class platform.

Interventions often fail to achieve long-term behavioral maintenance. Utilizing motivational and volitional strategies to promote behavioral maintenance factors may improve this. Using a full-factorial experiment, we tested the effects of three intervention components (focused on intrinsic motivation and identity, exercise preparation habit, and exercise instigation habit) on exercise participation over a year, among new users (N = 751; 91% identifying as female, 54% identifying as White race) of a global, online exercise class platform, run by Les Mills International Ltd, called LM+. We also tested the intervention components' theoretical mechanisms of action-habit formation, intrinsic motivation, identity, and self-efficacy. Multi-level models found some support for a main effect of the exercise preparation habit intervention component in promoting self-reported and objective exercise participation (behavioral outcomes measured via monthly surveys and the LM+ platform; mechanisms measured via monthly surveys)-in particular online exercise class frequency (fixed effect estimate = 0.84, p < 0.05, and = 0.12, p < 0.05, respectively). The preparation habit component also significantly increased preparation habit strength (0.30, p < 0.05) and instigation habit strength (0.33, p < 0.05). Other expected effects were nonsignificant. Helping individuals form an exercise preparation habit may facilitate initiating and maintaining exercise over time, in particular for attending online exercise classes, potentially through promoting greater preparation and exercise instigation habit strength.

The impact of organizational incentives on the loyalty of studying abroad teachers in Hainan, China: The mediating role of organizational commitment

Competition in higher education is essentially a competition for talent, particularly manifested in the competition among high-level university teachers. Therefore, enhancing teachers' loyalty to their profession and universities, controlling talent turnover, and establishing a responsible and well-structured teaching staff are fundamental to the sustainable development of universities. This study, based on the motivation-hygiene theory, utilized convenience sampling to conduct a questionnaire survey on internationally studying teachers from 21 universities in Hainan Province, China. A total of 667 valid questionnaires were collected, and a structural equation model was employed to investigate the influence of organizational incentives in Hainan's universities on the loyalty of international teaching staff; as well as the mediating effect of organizational commitment of international teachers between organizational incentives and loyalty. The research results show that both organizational incentives and organizational commitment can positively predict teachers' loyalty, and organizational incentives can positively predict organizational commitment. Organizational commitment plays a partial mediating role between organizational incentives and teachers' loyalty. Based on this, this study suggests that university administrators should establish a reasonable incentive mechanism and cultivate the organizational commitment of overseas-study teachers, in order to comprehensively enhance the loyalty of overseas-study teachers and ensure the stability of the teaching staff.

Unveiling the core constructs: A statistical approach to evaluating user experience with Chatbots in higher education (A case study from a university in Ecuador)

Introduction: Chatbots are increasingly utilized in education, offering real-time, personalized communication. While research has explored technical aspects of chatbots, user experience remains under-investigated. This study examines a model for evaluating user experience and satisfaction with chatbots in higher education. Methodology: A four-factor model (information quality, system quality, chatbot experience, user satisfaction) was proposed based on prior research. An alternative two-factor model emerged through exploratory factor analysis, focusing on “Chatbot Response Quality” and “User Experience and Satisfaction with the Chatbot.” Surveys were distributed to students and faculty at a university in Ecuador to collect data. Confirmatory factor analysis validated both models. Results: The two-factor model explained a significantly greater proportion of the data’s variance (55.2%) compared to the four-factor model (46.4%). Conclusion: This study suggests that a simpler model focusing on chatbot response quality and user experience is more effective for evaluating chatbots in education. Future research can explore methods to optimize these factors and improve the learning experience for students.

Transcranial Magnetic Stimulation: A New Possibility in Obesity Treatment

Obesity is a major public health challenge and results from the complex interaction of many etiopathogenetic factors. However, food-related hedonic stimuli and poor inhibitory control often appear to be specific maintenance factors, and conventional treatments are sometimes ineffective. Transcranial magnetic stimulation is emerging as a promising treatment option. Targeting specific brain regions, such as the dorsolateral prefrontal cortex, was found to be effective in modulating acute food craving and improving cognitive control. This review traces the evolution and development of transcranial magnetic stimulation and presents the results of recent randomized clinical trials conducted in obese subjects. These suggest that repetitive transcranial magnetic stimulation and deep transcranial magnetic stimulation may be effective in reducing body weight, BMI and food cravings. The neural circuits involved and the underlying mechanisms of action of this neurostimulation technique are also reviewed. Finally, outstanding questions and future research directions are identified to further understand and develop this promising therapy.

Fractional-Order Modeling of Heat and Moisture Transfer in Anisotropic Materials Using a Physics-Informed Neural Network.

Mathematical models of heat and moisture transfer for anisotropic materials, based on the use of the fractional calculus of integro-differentiation, are considered because such two-factor fractal models have not been proposed in the literature so far. The numerical implementation of mathematical models for determining changes in heat exchange and moisture exchange is based on the adaptation of the fractal neural network method, grounded in the physics of processes. A fractal physics-informed neural network architecture with a decoupled structure is proposed, based on loss functions informed by the physical process under study. Fractional differential formulas are applied to the expressions of non-integer operators, and finite difference schemes are developed for all components of the loss functions. A step-by-step method for network training is proposed. An algorithm for the implementation of the fractal physics-informed neural network is developed. The efficiency of the new method is substantiated by comparing the obtained numerical results with numerical approximation by finite differences and experimental data for particular cases.

Validity and reliability of the Chinese version of human–robot interaction self-efficacy scale in Chinese adults

BackgroundWith the fast-paced advancements of robot technology, human–robot interaction (HRI) has become increasingly popular and complex, and self-efficacy in HRI has received extensive attention. Despite its popularity, this topic remains understudied in China.ObjectiveIn order to provide a psychometrically sound instrument in China, this study aimed to translate and validate the Self-Efficacy in Human–Robot Interaction Scale (SE-HRI) in two Chinese adult samples (N1 = 300, N2 = 500).MethodsThe data was analyzed by SPSS 26.0 and Amos 24.0. Item analysis and exploratory factor analysis were conducted using Sample 1 data. Confirmatory factor analysis, criterion-related validity analysis, and reliability analysis were then performed using Sample 2 data.ResultsThe results revealed that the Chinese SE-HRI scale consisted of 13 items in a two-factor model, suggesting a good model fit. Moreover, general self-efficacy and willingness to accept the use of artificial intelligence (AI) were both positively correlated with self-efficacy in HRI, while negative attitudes toward robots showed an inverse correlation, proving the Chinese SE-HRI scale exhibited excellent criterion-related validity.ConclusionThe Chinese SE-HRI scale is a reliable assessment tool for evaluating self-efficacy in HRI in China. The study discussed implications and limitations, and suggested future directions.

Two-factor Rough Bergomi Model: American Call Option Pricing and Calibration by Interior Point Optimization Algorithm

Two-factor Rough Bergomi Model: American Call Option Pricing and Calibration by Interior Point Optimization Algorithm

Psychometric Properties and Gender Invariance of the Portuguese (European) Version of the Aging Sexual Knowledge and Attitudes Scale.

The sexuality of older people was understood as non-existent or as something outside the prevailing norm. In this sense, analysing people's sexual knowledge and attitudes towards older people is a challenge for theory and practice. The aim of this study is to translate and validate the Aging Sexual Knowledge and Attitudes Scale (ASKAS) for the Portuguese population. A sample of 994 Portuguese adults (70.9% women, n = 705) completed the ASKAS-PT along with a series of self-report measures. Confirmatory factor analysis and the psychometric properties of the Portuguese (European) version of ASKAS-PT were investigated, particularly reliability, temporal stability, and convergent and critical validity. This study also examined the gender measurement invariance of the ASKAS-PT. After confirmatory factor analysis, a two-factor model fit the Portuguese version best. Reliability and validity results also showed good results, and the ASKAS-PT appears to be a gender-invariant measure. Overall, the Portuguese version of the ASKAS showed good psychometric properties and appears to be a valid and reliable measure for assessing knowledge and attitudes about aging.

A Psychophysiological Investigation of Mechanisms Underlying "Feeling Fat" in Women With and WithoutBinge Eating.

"Feeling fat", the somatic experience of being overweight not fully explained by objective body weight, is considered to be an eating pathology maintenance factor. The traditional clinical understanding of "feeling fat" is based on the body displacement hypothesis, which suggests that negative emotions are projected onto the body and experienced as "feeling fat" in lieu of adaptive emotion regulation. A more recent theory suggests that "feeling fat" occurs in response to thought-shape fusion (TSF), a cognitive distortion in response to the imagined consumption of perceived fattening food. The present experimental study compared the roles of these two proposed mechanisms of "feeling fat" using self-report and psychophysiological measures. Eighty-two women (41 with binge eating, 41 control participants) self-reported "feeling fat" and had their heart rate variability (HRV), a physiological index of emotion regulation, measured before and after imagined inductions. Participants imagined either a personalized negative affective experience or consuming a preferred, so-called 'fattening' food. The TSF induction increased self-reports of "feeling fat" among participants with binge eating but not among control women. The negative affect induction did not increase self-reported "feeling fat" in either group. HRV did not significantly change in response to either induction for either group. TSF may be a more potent precursor to "feeling fat" than negative affect for individuals with binge eating. This may suggest new treatment directions, such as cognitive defusion from TSF when patients experience "feeling fat." The utility of HRV in monitoring "feeling fat" is questionable.

Optimization of Pyrolysis Parameters by Design of Experiment for the Production of Biochar from Sewage Sludge

Sewage sludge management is a key concern in today’s world. Improper disposal can lead to various environmental issues including air, water and soil pollution. Among the available technologies, thermal treatments, particularly pyrolysis, are gaining interest for their ability to reduce sewage sludge volume and to recover materials and energy from it. This study explored the influence of some relevant parameters in the thermal pyrolysis process. The design of experiment, named central composite design, was accounted to optimize temperature, heating rate and residence time in order to maximize the biochar yield and its CO2 adsorption capacity. A two-factor interaction model provided a satisfactory interpretation of the results. Within the studied ranges, maximum values of 47.8 wt% and 0.514 mol CO2/kg were obtained for the yield and CO2 adsorption capacity, respectively. Two significant experiments were repeated in a different pyrolysis system highlighting how other factors (e.g., reactor geometry, granulometry, etc.) can influence the quantity and the quality of produced biochar. The biochar obtained under the best pyrolysis conditions was characterized by a surface area of 124 m2/g and an ash content of 61 wt%. Lastly, the theoretical energy balance showed that the drying process is the main energy-intensive step in the pyrolysis of sewage sludge.

Mediating Effect of Psychological Empowerment Between Perceived Organizational Support and Job Satisfaction Among Engineers in Malaysia

Objective: This research study aims to examine the factors influencing job satisfaction among engineers in Malaysia manufacturing industry. The factors consist of direct compensation, job security, perceived organizational support and mediating role of psychological empowerment. Theoretical Framework: The Maslow’s hierarchy of needs and Herzberg’s two-factor theories were employed in the research and interpret the findings. Method: A quantitative research method was employed to examine the relationships between variables through survey collected from respondents that working in various manufacturing firms across Malaysia. The study utilized a structured questionnaire distributed among 384 respondents via digital platform such as Google questionnaires. This study employed convenient sampling method to ensure representation across different manufacturing sectors. The cross-sectional approach was utilized to capture a snapshot of job satisfaction and its causes at a particular point in time, reflecting current attitudes and influences in Malaysia's manufacturing industry. The data collected will be analyzed using SPSS software for both the pilot test and data analysis. Pearson Correlation, Multiple Regression and PROCESS macro will use to examine the significant relationships between variables and hypothesized relationships. Results and Discussion: The findings show that there are strong positive relationship between direct compensation, job security, perceived organizational support and job satisfaction among engineers. Also, psychological empowerment was revealed as a key mediator to strengthening the link between perceived organizational support and job satisfaction. Research Implications: The results hold practical implications for organizational management and policymakers seeking to increase job satisfaction among engineers. The recommendations include fair and competitive wage structures, ensuring job security through transparent recruiting procedures, creating supportive organizational climates and empowering people to increase job satisfaction.

ICD-11 adjustment disorder: Translation and validation of the Danish international adjustment disorder questionnaire among a working population of social educators

Adjustment disorder is frequently used as a diagnostic category for work-related stress disorders in Denmark. However, the diagnostic category is poorly delineated in ICD-10 which has hampered clinical practice as well as research studying the development of work-related adjustment disorders. In ICD-11, the diagnostic category of adjustment disorder has been refined and a new self-report measure is available to operationalize symptoms. The aim of the current study is to translate the International Adjustment Disorder Questionnaire (IADQ) to Danish and test the psychometric properties of the scale in a sample of social educators. A total of 609 social educators in current employment participated in an online survey including the IADQ and data was analyzed using confirmatory factor analysis. Findings suggested that a two-factor model reflecting the distinction between preoccupation and failure to adapt as part of the diagnostic criterion fitted the data best, although strong factor correlations and one cross-factor loading suggests that differentiating between the dimensions of preoccupation and failure to adapt is difficult. Relationships to burnout, posttraumatic stress and general distress support the validity of the Danish translation of the IADQ. Further research should explore the structure of adjustment disorder among other working populations.

Prevalence of dentine hypersensitivity, erosive tooth wear, gingival recession and periodontal health in seven European countries

ObjectivesTo determine the prevalence and associated risk indicators for dentine hypersensitivity (DH), erosive tooth wear (ETW), gingival recession (GR), and gingival inflammation (bleeding on probing, BOP), with clinical and questionnaire data from seven European countries. MethodsA cross-sectional, observational, seven-European country, epidemiological study in systemically healthy adults. Participants completed a questionnaire regarding oral hygiene, diet and lifestyle factors. A clinical examination, by calibrated examiners, measured DH (Schiff; participant yes/no), ETW (basic erosive tooth wear examination, BEWE), GR (mm), and BOP (yes/no). Results3551 participants completed the study, mean age 44 ± 17.4, 43.6 % male, 26.1 % rural dwellers. DH (Schiff ≥ 1) was seen in 75.9 % of participants, ETW (BEWE ≥ 1) in 97.6 %, GR (≥1 mm) in 87.9 %. 65.7 % participants had BOP ≥ 10 % sites, 34.3 % BOP<10 % with probing depths ≤3 mm. DH, ETW, GR and BOP increased markedly during young adult life. Thereafter, GR and ETW continued to increase, DH declined after around age 38–47, and BOP plateaued after age 48. DH was significantly associated with ETW (p < 0.001) and GR (p < 0.01); GR was significantly associated with BOP on lingual surfaces (p = 0.017). There were significant associations between increased full mouth BOP ≥ 10 % and reduced brushing duration and exercise frequency (p < 0.001); increased DH and heartburn (p < 0.001); decreased DH (p < 0.001), ETW (p < 0.001) and BOP ≥ 10 % (p = 0.002) with powered toothbrush use. ConclusionsPrevalence of oral conditions assessed was high, greater than in the majority of the GR, DH and ETW literature. Periodontal health was seen in a third of sampled individuals. All these conditions varied markedly by country and age. Clinical significanceOral diseases and conditions were highly prevalent throughout the seven European countries investigated. For the majority, these conditions are eminently preventable and treatable by changing behaviours. Upstream policy changes are needed to address these health challenges, to raise awareness and to empower individuals with oral health education and support.

Phubbing in Adolescents: Spanish Validation of the Phubbing Scale (PS).

The Phubbing Scale (PS) is an instrument used to measure the frequency and extent of the behavior of ignoring someone you are with and giving attention to your mobile phone instead. However, there is insufficient evidence about the psychometric adequacy of the Spanish version of the instrument. The main goal of this research was to analyze the psychometric properties of PS in a representative sample of Spanish adolescents and young adults. A total of 1351 participants comprised the sample (42.78% females, age range = 12-21). Students were selected from different levels of education such as secondary school, high school, vocational training, or university. A convenient sample was used. The reliability of the scores was calculated by means of McDonald's Omega. The evidence of the internal structure of the questionnaire was analyzed by means of confirmatory factor analysis (CFA). The measurement invariance of the instrument by gender and educational level was also calculated. In addition, Pearson's correlations between phubbing and other indicators of mental health were also calculated. The goodness-of-fit indices for the two-factor model were good. The McDonald's Omega coefficient for the total score was 0.787. Measurement invariance both by gender and educational level was found. The phenomenon of phubbing was found to have statistically significant correlations with emotional well-being, other mental health indicators, and with Problematic Internet Use (PIU), with the sole exception of the hyperactivity subscale of the SDQ. This study provided validity evidence for the Spanish version of the Phubbing Scale (PS), suggesting that PS is a reliable tool for quantifying phubbing in Spanish adolescents.

Psychometric properties of the farsi version of the international trauma questionnaire -child and adolescent version (ITQ-CA) in a sample of iranian children and adolescents exposed to trauma

BackgroundThe International Trauma Questionnaire-Child and Adolescent Version (ITQ-CA) is a self-report measure for post- traumatic stress disorder (PTSD) and complex post-traumatic stress disorder (CPTSD), corresponding to the diagnostic criteria in the International Classification of Diseases, 11th Revision (ICD-11). While in the meantime the original English version of the ITQ-CA is available in different languages such as traditional and simplified Chinese, German, or Spanish, the Farsi was missing so far. ObjectiveThe purpose of this study was to evaluate the psychometric properties of the Farsi International Trauma Questionnaire-Child and Adolescent version (ITQ-CA) in a sample of Iranian children and adolescents objectively exposed to a traumatic event. MethodA total of 130 participants completed the Farsi form of the ITQ-CA and the Farsi Child and Adolescent Trauma Screen (CATS) for comparison. For the psychometric evaluation, we used confirmatory factor analysis (CFA) and bivariate correlations. ResultsThe Farsi version of ITQ-CA self-report form yielded scores with robust reliability (internal consistency ranging from 0.83 to 0.91, and the Intraclass correlation coefficients (ICC) varied from 0.74 to 0.92 with moderate, good, and excellent results) and adequate convergent validity (correlations with the CATS ranging from 0.49 to 0.77). CFA supported ICD-11 CPTSD symptom structure as a two-factor higher order model with PTSD. We found that the two-factor model fit the data better than the other measurement models (χ2/df = 43.492/37=1.175, RMSEA = 0.038, CFI = 0.994, TLI = 0.989, SRMR = 0.04.( ConclusionThe Farsi version of the ITQ-CA showed very good and satisfactory psychometric properties. As such, the Farsi ITQ-CA appears to be a valid and reliable self-rating measure to assess PTSD and DSO in Farsi-speaking children and adolescents exposed to traumas.

Post-acquisition transformation challenges: how did the change in ownership affect Soni Manipal Hospital, Jaipur, in the early years?

Subject area of the teaching case MBA. Student level and proposed courses the teaching case can be used on Master’s level in Change Management, Organizational Leadership and Human Resource Management. A brief overview of the teaching case Mr Sharma, the dynamic and entrepreneurial Chief Executive Officer (CEO) of the newly formed Soni Manipal Hospital (SMH), Jaipur, and Unit Head, Manipal Hospitals [Manipal Health Enterprises Pvt Ltd. (MHEPL)], in a meeting with SMH’s Head of Human Resources and the Head of the Nursing Management, Mr Yaduvanshi realised the exponential growth of employee resistance, their lack of skills and technological advancements for documentation hindering the hospital's transformation goal. The case study highlighted the challenges the protagonist faced when taking charge as the CEO after nine months of acquisition and the factors contributing to them. Expected learning outcomes Students reading this case are expected to understand leadership theories, strategic and quality management approaches, and theories of social behaviour, such as Herzberg’s two-factor theory and social exchange theory (SET) and the application of these concepts in acquired organisations to develop healthy leadership–employee relations and change management theories. Supplementary materials Teaching notes are available for educators only. Subject code CSS 6: Human resource management.