Simplex Pattern Research Articles

Simplex Pattern Prediction Based on Dynamic Higher Order Path Convolutional Networks

Simplex Pattern Prediction Based on Dynamic Higher Order Path Convolutional Networks

PRELIMINARY CONFIRMATORY FACTOR ANALYSIS OF THE SERBIAN VERSION OF THE ORIGINAL SPORT MOTIVATION SCALE (SMS-28)

Self-determination theory is a dominant conceptual frame in the research of sports motivation, while the original Sport motivation scale, SMS-28, is adapted in many languages. The aim of this research was to translate and adapt the original scale into the Serbian language and to conduct a preliminary factor analysis in order to confirm a seven-factor solution. The sample included 608 active athletes on an international, national or lower competition level in different individual or team sports, of both genders, with a Median value for age of 18 years, an average of 10 years of sports experience. The results indicated good internal consistency of the Serbian version (Mean alpha 0.86), with only an amotivation subscale with a low alpha value (0.54). A simplex pattern of the self-determination continuum was confirmed. The confirmatory factor analysis suggested some good fit indices (X2/df=4.26; SRMR=0.07; RMSEA=0.07; GFI=0.85; AGFI=0.81), while some indices did not meet the criteria of good model fit (CFI=0.81; NFI=0.77). We suggest further research should examine the scale on a more homogeneous sample in regard to competition level. Key words: motivation, sport motivation scale, intrinsic motivation, extrinsic motivation, factor analysis

MAUIL: Multilevel attribute embedding for semisupervised user identity linkage

User identity linkage (UIL) across social networks has recently attracted an increasing amount of attention due to its significant research challenges and practical value. Most of the existing methods use a single method to express different types of attribute features. However, the simplex pattern can neither cover the entire set of different attribute features nor capture the higher-level semantic features in the attribute text. This paper establishes a novel semisupervised model, namely the multilevel attribute embedding for semisupervised user identity linkage (MAUIL), to seek the common user identity across social networks. MAUIL includes two components: multilevel attribute embedding and regularized canonical correlation analysis (RCCA)-based linear projection. Specifically, the text attributes for each network are first divided into three types: character-level, word-level, and topic-level attributes. Second, unsupervised approaches are employed to extract the corresponding three types of text attribute features, and user relationships are embedded as a complimentary feature. All the resultant features are combined to form the final representation of each user. Finally, target social networks are projected into a common correlated space by RCCA with the help of a small number of prematched user pairs. We demonstrate the superiority of the proposed method over state-of-the-art methods through extensive experiments on two real-world datasets. All the datasets and codes are publicly available online.11https://github.com/ChenBaiyang/MAUIL.

Adaptation and validation of the Portuguese version of the regulation of eating behavior scale (REBSp)

The aim of present study was two-fold: i) to translate and adapt the Regulation of Eating Behavior Scale to Portuguese (REBSp), and ii) to analyze its psychometrics properties (factorial validity with gender invariance analyses, reliability and construct validity). The study sample was composed by 471 Portuguese participants (68.4% females) with a mean age of 30.5 years (SD = 11.2). Structural equation modeling was used to verify the psychometric properties of the scale using SPSS v. 23.0 and AMOS 24.0 software. The analysis showed that the Portuguese 24-item scale presented a good fit, achieving good reliability and convergent validity. Some issues arose with discriminant validity within autonomous and controlled regulations, discussed in light of the simplex pattern expected by self-determination theory literature. Additionally, the scale presented concurrent validity and evidence of gender measurement invariance. Latent mean analysis between genders showed that women presented higher means for intrinsic motivation and integrated regulation when compared to men. In conclusion, analyses suggest that the 24-item Portuguese version of REBS can be used safely to assess the eating regulation in both genders.

The Motivation for Learning Music (MLM) questionnaire: Assessing children’s and adolescents’ autonomous motivation for learning a musical instrument

The purpose of this study was to examine the psychometric properties and construct validity of The Motivation for Learning Music (MLM) questionnaire, designed to measure the autonomous motivation of young music students. Based on Self-Determination Theory (Deci and Ryan in Intrinsic motivation and self-determination in human behavior, Plenum, New York, 1985), the instrument consists of five subscales, each assessing a different type of motivation: intrinsic motivation, identification and integration, introjection, external regulation, and amotivation. We studied 337 child–parent pairs, with 257 of the children studying piano, and 80 studying violin. The children were age 6–17. The item pool was administered to the children, and various construct validation measures were administered to the children and/or their parents. For the final MLM, we selected 5 items per subscale, based on their psychometric properties and a desire to adequately cover each content domain. Each subscale formed a distinct component in principal components analysis; the questionnaire performed well in confirmatory factor analysis; the inter-correlations of the subscales had a consistent simplex pattern; and all subscales had alphas above .80.

The Academic Self-Regulation Questionnaire: a study with Portuguese elementary school children

BackgroundSeveral studies have focused on the assessment of students’ motivation because this construct is very important to understand students’ learning and how to enhance it. The Academic Self-Regulation Questionnaire (SRQ-A), based on the self-determination theory is a self-report instrument developed to access the reasons why students do their school work. However, there is no Portuguese version of this questionnaire for late elementary students. The primary goal of this research was to analyze the psychometric properties of a Portuguese version of SRQ-A in the domain of Mathematics with elementary school children.MethodsParticipants were 341 elementary school children ranging from 8 to 11 years old from the third and fourth grades. The Portuguese version of the SRQ-A included 24 items assessing four regulatory styles (external, introjected, identified, and intrinsic) in three behavioral categories (homework, classwork, and answering questions in mathematics lessons). To examine the psychometric properties of the instrument, we conducted an exploratory structural equation modeling (ESEM), measured gender and grade invariance, and calculated internal consistency indexes and temporal stability.ResultsESEM analyses supported the original multidimensional structure of the measure with four regulatory styles using a reduced version of the instrument with 16 items. Correlations between the four regulatory styles revealed a simplex pattern consistent with the continuum of self-determination theory. Results showed adequate internal consistency for all regulatory styles (α ≥ .73; CR ≥ .76) and temporal stability (4-month test-retest ≥ .43). The questionnaire showed measurement and structural invariance across gender and grade. Finally, some gender differences were observed; on average, boys scored higher than girls in external regulation. No differences were observed between grades.ConclusionsOur findings suggest that the Portuguese version of the SRQ-A has good psychometric properties providing adequate support for its use in educational research on motivational styles, including studies concerning gender and grade differences in self-regulation.

How to measure the self-determination continuum? Initial validity evidence for the polish version of the Global Motivation Scale (GMS)

The Global Motivation Scale (GMS) is an 18-item self-report questionnaire. It measures a multidimensional conceptualization of motivation that falls along the self-determination continuum. The aim of the study was to evaluate the psychometric properties of the Polish version of the GMS, and to investigate its structure and reliability in a group of 537 subjects, aged 18–86 (M = 36.19; SD = 15.20). The bifactor modelling didn’t validate the theoretical six-factor model of the GMS, thus an exploratory analysis was conducted to determine an optimal model across age, gender and education. The adopted four-factor model matched three original GMS subscales: intrinsic motivation, external regulation and amotivation; the fourth factor represented identified and integrated regulations simultaneously (introjected regulation wasn’t included). Correlations among the factors didn’t confirm the simplex pattern, while the composite reliability coefficients were low (.55–.66). It is insufficient to analyze the assessment of the self-determination continuum only for statistical correctness – linguistic and cultural contexts should also be considered.

Exploring longitudinal measurement invariance and the continuum hypothesis in the Swedish version of the Behavioral Regulation in Sport Questionnaire (BRSQ): An exploratory structural equation modeling approach

ObjectivesThe aims of the present study were to: (a) examine longitudinal measurement invariance in the Swedish version of the Behavioral Regulations in Sport Questionnaire (BRSQ) and (b) examine the continuum hypothesis of motivation as postulated within self-determination theory. DesignTwo-wave survey. MethodYoung competitive athletes (N = 354) responded to the BRSQ early in the season (November) and at the end of the athletic season (April). Data were analyzed using exploratory structural equation modeling (ESEM) and bifactor ESEM. ResultsWe found support for strict longitudinal measurement invariance in the BRSQ. Latent mean comparisons showed an increase in external regulation and amotivation across the season. The latent factor correlations indicated some deviations from a simplex pattern related to amotivation, external regulation, and introjected regulation. In the bifactor model, intrinsic motivation items had negative factor loadings on the global factor, identified regulation items had factor loadings approaching zero, and introjected and external regulation and amotivation items all had moderate to strong positive factor loadings. ConclusionThe present study adds longitudinal measurement invariance to the psychometric evidence of the BRSQ. Research on why the latent means of the behavioral regulations changed over the athletic season is warranted. The continuum hypothesis was partially supported. Latent factor correlations and factor loadings on the global factor in the bifactor ESEM highlighted that the discriminant validity of the controlled regulations and amotivation needs further investigation.

Validation of a motivation survey tool for pharmacy students: Exploring a link to professional identity development

IntroductionSelf-determination theory (SDT), which describes a continuum of motivation regulators, is proposed as an appropriate framework to study pharmacy student motivation. The aim was to develop a Pharmacy Motivation Scale (Pharm-S) to determine motivation regulators in undergraduate students and explore a possible link to professional identity development. MethodsThe Pharm-S was adapted from the SDT-based, Sports Motivation Scale (SMS-II), and administered to undergraduate students in an Australian pharmacy course. Convergent validity was assessed by conducting a correlation analysis between the Pharm-S and MacLeod Clark Professional Identity Scale (MCPIS-9). ResultsFace, content and construct validity were established for the Pharm-S through the analysis of 327 survey responses. Factor analysis extracted four of the six theoretical subscales as proposed by SDT (variance explained: 65.7%). Support for the SDT structure was confirmed by high factor loadings in each of the subscales and acceptable reliability coefficients. Subscale correlations revealed a simplex pattern, supporting the presence of a motivation continuum, as described by SDT. A moderate positive correlation (0.64) between Pharm-S responses and the validated professional identity instrument, MCPIS-9, indicated a possible link between levels of motivation and professional identity. Discussionand conclusions: Content and structural validity and internal consistency of the Pharm-S confirmed the reliability of the Pharm-S as a valid tool to assess motivational regulators. Pharm-S and the MCPIS-9 were positively correlated, lending support to a link between motivation and professional identity. This suggests a potential role for the Pharm-S as a valid tool to measure pharmacy student professional identity development.

French adaptation and validation of the Sport Motivation Scale-II (Echelle de Motivation dans les Sports-II)

We report on the development, the adaptation, the validation, and the utility of the French version of the revised Sport Motivation Scale (SMS-II), namely the EMS-II (Échelle de Motivation dans les Sports), a scale developed originally in English to measure the six motivation subtypes (intrinsic motivation, integrated, identified, introjected, and external regulation of extrinsic motivation, and amotivation) proposed by self-determination theory (SDT). Results from two studies with athletes (N = 506) from different sports indicated that the scale has good psychometric properties. Specifically, the results of the confirmatory factor analysis suggest that the scale holds an adequate structure consistent with the six types of motivation proposed by SDT, and that French and English athletes were invariant with regard to the structure of the six-factor scale. The results also indicated that the scale had sufficient discriminant and convergent validity, and Cronbach’s alpha suggests that all subscales have adequate internal consistency. Finally, correlations between the subscales suggest evidence of a simplex pattern, which support the self-determination continuum within the SDT framework. Direction for future research and conceptual implications are discussed.

Turkish version of the Academic Motivation Scale.

The purpose of this study was to adapt the college version of the Academic Motivation Scale (AMS) into Turkish. The participants were 797 college students (437 men, 360 women) with a mean age of 20.1 yr. A seven-factor model of the scale, as well as alternative models (five-, three-, two-, and one-factor models) were investigated and compared through confirmatory factor analysis. The seven-factor model demonstrated adequate fit to the data. The fit indices obtained from the five-factor model were acceptable also. Hancock's coefficient H values and test-retest correlation coefficients of the subscales indicated that reliability of the scale was adequate except for the identified regulation subscale. The CFA conducted for the groups of men and women produced more acceptable fit indices values for men than women, but women obtained significantly higher scores from the AMS subscales. Correlations among the seven subscales partially supported the simplex pattern which claims that the neighboring subscales should have stronger positive correlations than the non-neighboring subscales and that the subscales which are the farthest apart should have the strongest negative relationships.

Novel PAX9 and COL1A2 missense mutations causing tooth agenesis and OI/DGI without skeletal abnormalities.

Inherited dentin defects are classified into three types of dentinogenesis imperfecta (DGI) and two types of dentin dysplasia (DD). The genetic etiology of DD-I is unknown. Defects in dentin sialophosphoprotein (DSPP) cause DD type II and DGI types II and III. DGI type I is the oral manifestation of osteogenesis imperfecta (OI), a systemic disease typically caused by defects in COL1A1 or COL1A2. Mutations in MSX1, PAX9, AXIN2, EDA and WNT10A can cause non-syndromic familial tooth agenesis. In this study a simplex pattern of clinical dentinogenesis imperfecta juxtaposed with a dominant pattern of hypodontia (mild tooth agenesis) was evaluated, and available family members were recruited. Mutational analyses of the candidate genes for DGI and hypodontia were performed and the results validated. A spontaneous novel mutation in COL1A2 (c.1171G>A; p.Gly391Ser) causing only dentin defects and a novel mutation in PAX9 (c.43T>A; p.Phe15Ile) causing hypodontia were identified and correlated with the phenotypic presentations in the family. Bone radiographs of the proband’s dominant leg and foot were within normal limits. We conclude that when no DSPP mutation is identified in clinically determined isolated DGI cases, COL1A1 and COL1A2 should be considered as candidate genes. PAX9 mutation p.Phe15Ile within the N-terminal β-hairpin structure of the PAX9 paired domain causes tooth agenesis.

Design of PID controllers for dead-time systems using hybrid biogeography based optimisation

This paper introduces the application of BBO algorithms to Proportional Integral Derivative (PID) controller tuning. Derivative free optimisation methods, namely simplex derivative pattern search and implicit filtering are used to hybridize BBO algorithm resulting in improved convergence than original BBO. The effectiveness of the proposed algorithms namely SDPS–BBO, IMF–BBO are demonstrated using PID and Smith predictor controller schemes applied to unit step set point response for a class of dead–time systems and the results are compared with earlier controller tunings proposed by Kookos and Syrcos, Chidambaram, Luyben, Kanthaswamy and Jovitha Jerome.

On the Predictive Efficiency of Past Performance and Physical Ability: The Case of the National Football League

This study investigated the criterion-related validity of past performance and physical ability tests over time in a physically demanding context, the National Football League (NFL). Results suggested that an indicator of past performance, collegiate performance, engendered a stronger relationship with future NFL performance than a variety of physical ability tests administered during the NFL Combine. Unlike physical ability, past performance remained a valid predictor across four years of the criterion domain; however, the validity coefficients eventually deteriorated over time, following a simplex pattern commonly found with general mental ability tests. Implications germane to staffing research and practice are discussed.

Control of dead-time systems using derivative free particle swarm optimisation

Particle swarm optimisation (PSO), a population-based nature inspired algorithm has mostly been used for solving continuous optimisation problems, discrete variants also exist. It finds application in most of the engineering design problems. This paper introduces two improved forms of PSO algorithm applied to PID controller and Smith predictor design for a class of time delay systems. In this paper, derivative free optimisation methods, namely simplex derivative pattern search and implicit filtering are used to hybridise PSO algorithm with improved convergence than original PSO. The effectiveness of the proposed algorithms namely SDPS-PSO, IMF-PSO are demonstrated using unit step set point response for a class of dead-time systems using PID controller and Smith predictor designed using the proposed hybrid PSO algorithms. The results are compared with earlier controller tunings proposed by Kookos, Syrcos, Chidambaram, Kanthaswamy and Luyben.

Initial Validity Evidence for the Behavioral Regulation in Exercise Questionnaire-2 Among Greek Exercise Participants

The present study investigated the factor structure, scale dimensionality, discriminant validity, internal consistency, simplex structure, and nomological validity of the Greek translation of the Behavioral Regulation in Exercise Questionnaire-2 (BREQ-2; Markland & Tobin, 2004 ). A total of 733 Greek exercise participants completed the translated scale to indicate their reasons for participation in structured exercise programs. Confirmatory factor analyses supported the a priori 5-factor structure with strong internal consistency for the instrument subscales. Further support was obtained for the simplex pattern as well as the nomological correlations of the translated BREQ-2 responses with self-determination theory variables. Overall, the results provided initial support for the psychometric value of the Greek translation of the BREQ-2, rendering it appropriate for continued self-determination exercise research among Greek-speaking exercise participants.

Preliminary Validation in Spanish of a Scale Designed to Measure Motivation in Physical Education Classes: The Perceived Locus of Causality (PLOC) Scale

The purpose of this paper was to validate the Spanish version of the Perceived Locus of Causality Scale (PLOC; Goudas, Biddle, & Fox, 1994). To achieve this, two studies with samples of 1535 and 400 physical education students, of ages 12 to 17 years, were carried out. The psychometric properties of the PLOC were examined through the following analyses: confirmatory factor analysis, factor invariance, correlation among factors, reliability (Cronbach's alpha), temporal stability (test-retest), and criterion validity. The results partially supported the five-factor structure. This structure was invariant across the two study samples. Correlations among the subscales indicated a simplex pattern, supporting construct validity of the scale. Alpha values over .70 (except for introjected regulation) and high temporal stability (intra-class correlation coefficient = .83 to .90) over a four-week period were obtained. The mastery-approach goal positively predicted self-determined motivation, whereas the performance-avoidance goal predicted it negatively. Future studies should continue to analyze the psychometric properties of the PLOC, as the validation of an instrument should be an ongoing process.

Distributed Reduplication in Kankanaey

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Self-Determination Theory and Exercise Behavior: An Examination of the Psychometric Properties of the Exercise Motivation Scale

The purpose of these studies was to examine the psychometric properties of the Exercise Motivation Scale (EMS). One hundred forty-three undergraduates were surveyed in Study 1. Internal consistency reliability estimates ranged from .75 to .90 for the eight subscales. Discriminant validity was established via non-significant correlations with social desirability bias. The factor structure was confirmed by examining the intercorrelations of the EMS subscales which revealed a tenable simplex pattern. Differences on EMS subscales for participants at different Stages of Change supported group differentiation validity. Study 2 employed 58 undergraduates. Criterion validity was established by relationships between EMS subscales and distance walked during a self-selected intensity bout of exercise. A strong correlation between Exercise Identity Scale scores and integrated subscale scores supported the convergent validity of the integrated subscale. Overall the EMS yielded reliable scores and provided a valid means of making inferences about exercise behavior. Last, new findings about the relationship between the Self-Determination Theory and the Stages of Change Model are described which have significant applied implications.

Preliminary Validation of a Spanish Version of the Sport Motivation Scale

The Sport Motivation Scale was developed in French and later translated into English and validated by Pelletier, et al. in 1995. It is based on the principles of self-determination theory. In this study the scale was translated into Spanish to assess and validate it for a sample of 275 athletes (78 women and 197 men) whose mean age was 21.3 yr. (SD=3.8) and who represented eight sports (track and field, tennis, swimming, waterpolo, soccer, basketball, handball, and volleyball). The Spanish version showed satisfactory internal consistency (Cronbach alpha of .70 to .80) and temporal stability (test-retest r = .69 to .74) over a 4-wk. period. A confirmatory factor analysis partially supported the seven-factor structure. Correlations among the subscales indicated a simplex pattern supporting the construct validity of the scale. Sex differences were found. Taken together, these findings support use of the Spanish version for assessment of motivation in sport.