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  1. Fulltext Examination of the factor structure of the Schizotypal Personality Questionnaire among British and Trinidadian adults
    Barron D, Swami V, Towell T, Hutchinson G, Morgan KD
    Biomed Res Int, 2015;2015:258275.
    PMID: 25699263 DOI: 10.1155/2015/258275
    Much debate in schizotypal research has centred on the factor structure of the Schizotypal Personality Questionnaire (SPQ), with research variously showing higher-order dimensionality consisting of two to seven dimensions. In addition, cross-cultural support for the stability of those factors remains limited. Here, we examined the factor structure of the SPQ among British and Trinidadian adults. Participants from a White British subsample (n = 351) resident in the UK and from an African Caribbean subsample (n = 284) resident in Trinidad completed the SPQ. The higher-order factor structure of the SPQ was analysed through confirmatory factor analysis, followed by multiple-group analysis for the model of best fit. Between-group differences for sex and ethnicity were investigated using multivariate analysis of variance in relation to the higher-order domains. The model of best-fit was the four-factor structure, which demonstrated measurement invariance across groups. Additionally, these data had an adequate fit for two alternative models: (a) 3-factor and (b) modified 4-factor model. The British subsample had significantly higher scores across all domains than the Trinidadian group, and men scored significantly higher on the disorganised domain than women. The four-factor structure received confirmatory support and, importantly, support for use with populations varying in ethnicity and culture.
    Matched MeSH terms: Factor Analysis, Statistical
  2. Conceptualizing and measuring youth-adult partnership in community programs: a cross national study
    Zeldin S, Krauss SE, Collura J, Lucchesi M, Sulaiman AH
    Am J Community Psychol, 2014 Dec;54(3-4):337-47.
    PMID: 25216734 DOI: 10.1007/s10464-014-9676-9
    Youth participation in program and community decision making is framed by scholars as an issue of social justice, a platform for positive youth development and effective citizenry, and a strategy for nation building. Recent literature reviews have consistently identified youth-adult partnership (Y-AP) as an effective type of youth participation across highly diverse contexts. These same reviews, however, note that indicators of Y-AP have not been conceptualized and validated for measurement purposes. The present study addresses this limitation by developing a brief measure of Y-AP that is explicitly grounded in current theory, research, and community practice. The measure was administered to youth in the United States, Malaysia, and Portugal (N = 610). Validation was assessed through factor analysis and tests of factorial, discriminant, and concurrent validity. Results confirmed the two predicted dimensions of the Y-AP measure: youth voice in decision making and supportive adult relationships. These two dimensions were also found to be distinct from other measures of program quality: safety and engagement. As predicted, they also significantly correlated with measures of agency and empowerment. It is concluded that the measure has the potential to support community efforts to maximize the quality of youth programs.
    Matched MeSH terms: Factor Analysis, Statistical
  3. Factor Structure of Hospital Anxiety and Depression Scale in Malaysian patients with coronary artery disease
    Kaur S, Zainal NZ, Low WY, Ramasamy R, Sidhu JS
    Asia Pac J Public Health, 2015 May;27(4):450-60.
    PMID: 24807887 DOI: 10.1177/1010539514533719
    The Hospital Anxiety and Depression Scale (HADS) is a common screening instrument used to determine the levels of anxiety and depression experienced by a patient and has been extensively used in patients with coronary artery disease (CAD). This study aimed to establish the factor structure of HADS in a Malaysian sample of 189 patients with CAD. Factor analysis of HADS using principal component analysis with varimax rotation yielded 3 factors. Confirmatory factor analysis supported the use of HADS in assessing 3 distinct dimensions of psychological distress--namely, anxiety, anhedonia, and psychomotor retardation. The HADS showed good internal consistency and was found to be a valid measure of psychological distress among Malaysian patients with CAD. However, low mean scores on the original 2 factors--that is, anxiety and depression--and also on the 2 depression subscales--anhedonia and psychomotor retardation--suggests that the recommended cutoff score to screen for psychological distress among CAD patients be reevaluated. Further research to determine the generalizability and consistency for the tridimensional structure of the HADS in Malaysia is recommended.
    Matched MeSH terms: Factor Analysis, Statistical
  4. Driving anger in Malaysia
    Sullman MJ, Stephens AN, Yong M
    Accid Anal Prev, 2014 Oct;71:1-9.
    PMID: 24863369 DOI: 10.1016/j.aap.2014.04.019
    The present study examined the types of situations that cause Malaysian drivers to become angry. The 33-item version of the driver anger scale (Deffenbacher et al., 1994) was used to investigate driver anger amongst a sample of 339 drivers. Confirmatory factor analysis showed that the fit of the original six-factor model (discourtesy, traffic obstructions, hostile gestures, slow driving, illegal driving and police presence), after removing one item and allowing three error pairs to covary, was satisfactory. Female drivers reported more anger, than males, caused by traffic obstruction and hostile gestures. Age was also negatively related to five (discourtesy, traffic obstructions, hostile gestures, slow driving and police presence) of the six factors and also to the total DAS score. Furthermore, although they were not directly related to crash involvement, several of the six forms of driving anger were significantly related to the crash-related conditions of: near misses, loss of concentration, having lost control of a vehicle and being ticketed. Overall the pattern of findings made in the present research were broadly similar to those from Western countries, indicating that the DAS is a valid measure of driving anger even among non-European based cultures.
    Matched MeSH terms: Factor Analysis, Statistical
  5. ADHD bifactor model based on parent and teacher ratings of Malaysian children
    Gomez R
    Asian J Psychiatr, 2014 Apr;8:47-51.
    PMID: 24655626 DOI: 10.1016/j.ajp.2013.10.009
    The study used confirmatory factor analysis to ascertain support for the bifactor model of the Attention Deficit/Hyperactivity Disorder (ADHD) symptoms, based on parent and teacher ratings for a group of Malaysian children.
    Matched MeSH terms: Factor Analysis, Statistical
  6. Psychometric properties of the self-report Malay version of the Pediatric Quality of Life (PedsQLTM) 4.0 Generic Core Scales among multiethnic Malaysian adolescents
    Ainuddin HA, Loh SY, Chinna K, Low WY, Roslani AC
    J Child Health Care, 2015 Jun;19(2):229-38.
    PMID: 24154841 DOI: 10.1177/1367493513504834
    Adolescence is the potential period for growth and optimal functioning, but developmental issues like time of transition from childhood to adulthood will create stress and affect the adolescent's quality of life (QOL). However, there is a lack of research tool for measuring adolescent's QOL in Malaysia. The aim of the study was to determine the validity and reliability of the self-report Malay version of the pediatric QOL (PedsQL™) 4.0 Generic Core Scales in assessing the QOL of Malaysian adolescents. A cross-sectional study design using the 23-item self-report Malay version of the PedsQL 4.0 Generic Core Scales was administered on a convenient cluster sampling (n = 297 adolescent) from a secondary school. The internal consistency reliability had Cronbach's α values ranging from .70 to .89. Factor analysis reported a six-factor structure via principal axis factor analysis. In conclusion, the self-report Malay version of the pediatric QOL 4.0 Generic Core Scales is a reliable and valid tool to measure the QOL of multiethnic Malaysian adolescents.
    Matched MeSH terms: Factor Analysis, Statistical
  7. Phases of female sexual response cycle among Malaysian women with infertility: a factor analysis study
    Seen Heng Y, Sidi H, Nik Jaafar NR, Razali R, Ram H
    Asia Pac Psychiatry, 2013 Apr;5 Suppl 1:50-4.
    PMID: 23857837 DOI: 10.1111/appy.12044
    This cross-sectional study aimed to determine the construct of the phases of the female sexual response cycle (SRC) among women attending an infertility clinic in a Malaysian tertiary center.
    Matched MeSH terms: Factor Analysis, Statistical
  8. Cross-validation of an employee safety climate model in Malaysia
    Bahari SF, Clarke S
    J Safety Res, 2013 Jun;45:1-6.
    PMID: 23708470 DOI: 10.1016/j.jsr.2012.12.003
    Whilst substantial research has investigated the nature of safety climate, and its importance as a leading indicator of organisational safety, much of this research has been conducted with Western industrial samples. The current study focuses on the cross-validation of a safety climate model in the non-Western industrial context of Malaysian manufacturing.
    Matched MeSH terms: Factor Analysis, Statistical
  9. An examination of the factor structure of the Sociocultural Attitudes Towards Appearance Questionnaire-3 in Malaysia
    Swami V
    Body Image, 2009 Mar;6(2):129-32.
    PMID: 19249260 DOI: 10.1016/j.bodyim.2009.01.003
    The present study examined the factor structure of a Malay translation of the Sociocultural Attitudes Towards Appearance Questionnaire-3 among a community sample of 554 Malaysian women. Results of an exploratory factor analysis revealed the existence of four factors, two of which (Information and Internalization-Athlete) mirrored those found among Western samples. An additional factor was an amalgamation of two factors reported in the West, namely Pressure and Internalization-General. A fourth factor consisted of six items, four of which cross-loaded onto previous factors, and was consequently dropped from analyses. Cronbach's alpha coefficients for the three retained factors were all above .82, and the three factors were significantly correlated with each other and with participants' body mass index. The results of this study stress the need for locally developed scales in the study of body image and a shift away from reliance on scales developed in the West.
    Matched MeSH terms: Factor Analysis, Statistical
  10. The female sexual response cycle: do Malaysian women conform to the circular model?
    Sidi H, Naing L, Midin M, Nik Jaafar NR
    J Sex Med, 2008 Oct;5(10):2359-66.
    PMID: 18086161
    The concept of a sexual response cycle (SRC) for women has gained interest lately with the reintroduction of terms with new definitions and a new model for the sexual response, especially the Basson's circular model.
    Matched MeSH terms: Factor Analysis, Statistical
  11. Factor analysis study on sexual responses in women with type 2 diabetes mellitus
    Ismail AH, Bau R, Sidi H, Guan NC, Naing L, Nik Jaafar NR, et al.
    Compr Psychiatry, 2014 Jan;55 Suppl 1:S34-7.
    PMID: 23375262 DOI: 10.1016/j.comppsych.2012.12.028
    This study compared the components of sexual responses between Malaysian women with Type 2 diabetes mellitus and those without the disease.
    Matched MeSH terms: Factor Analysis, Statistical
  12. Anthropometric data reduction using confirmatory factor analysis
    Ademola James, Rohani JM, Olusegun AG, Rani MR
    Work, 2014;47(2):173-81.
    PMID: 23324693 DOI: 10.3233/WOR-121530
    OBJECTIVE: The unavailability of anthropometric data especially in developing countries has remained a limiting factor towards the design of learning facilities with sufficient ergonomic consideration. Attempts to use anthropometric data from developed countries have led to provision of school facilities unfit for the users. The purpose of this paper is to use factor analysis to investigate the suitability of the collected anthropometric data as a database for school design in Nigerian tertiary institutions.
    PARTICIPANTS: Anthropometric data were collected from 288 male students in a Federal Polytechnic in North-West of Nigeria. Their age is between 18-25 years.
    METHODS: Nine vertical anthropometric dimensions related to heights were collected using the conventional traditional equipment. Exploratory factor analysis was used to categorize the variables into a model consisting of two factors. Thereafter, confirmatory factor analysis was used to investigate the fit of the data to the proposed model.
    RESULTS: A just identified model, made of two factors, each with three variables was developed. The variables within the model accounted for 81% of the total variation of the entire data. The model was found to demonstrate adequate validity and reliability. Various measuring indices were used to verify that the model fits the data properly. The final model reveals that stature height and eye height sitting were the most stable variables for designs that have to do with standing and sitting construct.
    CONCLUSION: The study has shown the application of factor analysis in anthropometric data analysis. The study highlighted the relevance of these statistical tools to investigate variability among anthropometric data involving diverse population, which has not been widely used for analyzing previous anthropometric data. The collected data is therefore suitable for use while designing for Nigerian students.
    KEYWORDS: Exploratory factor analysis; measurement model; school ergonomics
    Matched MeSH terms: Factor Analysis, Statistical
  13. Measurement Invariance of the Internet Addiction Test Among Hong Kong, Japanese, and Malaysian Adolescents
    Lai CM, Mak KK, Cheng C, Watanabe H, Nomachi S, Bahar N, et al.
    Cyberpsychol Behav Soc Netw, 2015 Oct;18(10):609-17.
    PMID: 26468915 DOI: 10.1089/cyber.2015.0069
    There has been increased research examining the psychometric properties on the Internet Addiction Test (IAT) in different populations. This population-based study examined the psychometric properties and measurement invariance of the IAT in adolescents from three Asian countries. In the Asian Adolescent Risk Behavior Survey (AARBS), 2,535 secondary school students (55.9% girls) aged 12-18 years from Hong Kong (n=844), Japan (n=744), and Malaysia (n=947) completed a survey in 2012-2013 school year. A nested hierarchy of hypotheses concerning the IAT cross-country invariance was tested using multigroup confirmatory factor analyses. Replicating past findings in Hong Kong adolescents, the construct of the IAT is best represented by a second-order three-factor structure in Malaysian and Japanese adolescents. Configural, metric, scalar, and partial strict factorial invariance was established across the three samples. No cross-country differences on Internet addiction were detected at the latent mean level. This study provided empirical support for the IAT as a reliable and factorially stable instrument, and valid to be used across Asian adolescent populations.
    Matched MeSH terms: Factor Analysis, Statistical
  14. Fulltext Development of an instrument to measure medical students' perceptions of the assessment environment: initial validation
    Sim JH, Tong WT, Hong WH, Vadivelu J, Hassan H
    Med Educ Online, 2015;20:28612.
    PMID: 26511792 DOI: 10.3402/meo.v20.28612
    INTRODUCTION: Assessment environment, synonymous with climate or atmosphere, is multifaceted. Although there are valid and reliable instruments for measuring the educational environment, there is no validated instrument for measuring the assessment environment in medical programs. This study aimed to develop an instrument for measuring students' perceptions of the assessment environment in an undergraduate medical program and to examine the psychometric properties of the new instrument.
    METHOD: The Assessment Environment Questionnaire (AEQ), a 40-item, four-point (1=Strongly Disagree to 4=Strongly Agree) Likert scale instrument designed by the authors, was administered to medical undergraduates from the authors' institution. The response rate was 626/794 (78.84%). To establish construct validity, exploratory factor analysis (EFA) with principal component analysis and varimax rotation was conducted. To examine the internal consistency reliability of the instrument, Cronbach's α was computed. Mean scores for the entire AEQ and for each factor/subscale were calculated. Mean AEQ scores of students from different academic years and sex were examined.
    RESULTS: Six hundred and eleven completed questionnaires were analysed. EFA extracted four factors: feedback mechanism (seven items), learning and performance (five items), information on assessment (five items), and assessment system/procedure (three items), which together explained 56.72% of the variance. Based on the four extracted factors/subscales, the AEQ was reduced to 20 items. Cronbach's α for the 20-item AEQ was 0.89, whereas Cronbach's α for the four factors/subscales ranged from 0.71 to 0.87. Mean score for the AEQ was 2.68/4.00. The factor/subscale of 'feedback mechanism' recorded the lowest mean (2.39/4.00), whereas the factor/subscale of 'assessment system/procedure' scored the highest mean (2.92/4.00). Significant differences were found among the AEQ scores of students from different academic years.
    CONCLUSIONS: The AEQ is a valid and reliable instrument. Initial validation supports its use to measure students' perceptions of the assessment environment in an undergraduate medical program.
    KEYWORDS: assessment environment; development; instrument; psychometric properties; validation
    Matched MeSH terms: Factor Analysis, Statistical
  15. Patient satisfaction constructs
    Rahman MS, Osmangani AM
    Int J Health Care Qual Assur, 2015;28(8):841-54.
    PMID: 26440486 DOI: 10.1108/IJHCQA-05-2015-0056
    The purpose of this paper is to examine the five-factor structure of patients' satisfaction constructs toward private healthcare service providers.
    Matched MeSH terms: Factor Analysis, Statistical
  16. Fulltext DSM-IV-defined anxiety disorder symptoms in a middle-childhood-aged group of Malaysian children using the Spence Children's Anxiety Scale
    Ahmadi A, Mustaffa MS, Udin A, Haghdoost A
    Trends Psychiatry Psychother, 2016 03 18;38(1):14-22.
    PMID: 27007941 DOI: 10.1590/2237-6089-2015-0027
    INTRODUCTION: Pediatric anxiety disorders are the most common mental health disorders in the middle-childhood age group. The purpose of this study is to assess anxiety disorder symptoms, as defined by the Diagnostic and Statistical Manual of Mental Disorders, 4th edition (DSM-IV), in a large community sample of low socioeconomic level rural children and to investigate some of the psychometric properties (internal consistency, construct and convergent validity and items rated as often or always experienced) of the Malay version of the Spence Children's Anxiety Scale - Child version (SCAS-C).

    METHOD: Six hundred children aged 9-11 and 424 of their parents completely answered the child or parent versions of the SCAS.

    RESULTS: Results indicated that the internal reliability of subscales were moderate to adequate. Significant correlations between child and parent reports supported the measure's concurrent validity. Additionally, anxiety levels in this Malaysian sample were lower than among South-African children and higher than among their Western peers. There were both similarities and differences between symptom items reported as often or always experienced by Malaysian students and by children from other cultures. Confirmatory factor analysis provided evidence of the existence of five inter-correlated factors for anxiety disorders based on SCAS-C.

    CONCLUSION: Although some of the instrument's psychometric properties deviated from those observed in some other countries, it nevertheless appears to be useful for assessing childhood anxiety symptoms in this country.

    Matched MeSH terms: Factor Analysis, Statistical
  17. Fulltext Failure to replicate the internal structure of Greek-specific thalassemia quality of life instrument in adult thalassemia patients in Sabah
    Keowmani T, Lee LW
    Patient Prefer Adherence, 2016;10:205-11.
    PMID: 26955264 DOI: 10.2147/PPA.S96880
    PURPOSE: To study the validity and reliability of the Malay version of the Specific Thalassemia Quality of Life Instrument (STQOLI) in Sabah's adult thalassemia patients.
    PATIENTS AND METHODS: This cross-sectional study was done at Thalassemia Treatment Centre, Queen Elizabeth Hospital in Sabah, Malaysia. Eighty-two adult thalassemia patients who fulfilled the inclusion and exclusion criteria were conveniently selected for participation in the study. The English version of STQOLI was translated into Malay by using forward and back translations. The content of the questionnaire was validated by the chief hematologist of the hospital. The construct validity of the 40-item questionnaire was assessed by principal component analysis with varimax rotation and the scale reliability was assessed by Cronbach's alpha.
    RESULTS: The study failed to replicate the internal structure of the Greek STQOLI. Instead, 12 factors have been identified from the exploratory factor analysis, which accounted for 72.2% of the variance. However, only eight factors were interpretable. The factors were iron chelation pump impact, transfusion impact, time spent on treatment and its impact on work and social life, sex life, side effects of treatment, cardiovascular problems, psychology, and iron chelation pill impact. The overall scale reliability was 0.913.
    CONCLUSION: This study was unable to replicate the internal structure of the Greek STQOLI in Sabah's adult thalassemia patients. Instead, a new structure has emerged that can be used as a guide to develop a questionnaire specific for adult thalassemia patients in Sabah. Future research should focus on the eight factors identified from this study.
    KEYWORDS: Malay; STQOLI; reliability; transfusion; validity
    Matched MeSH terms: Factor Analysis, Statistical
  18. Fulltext Students' motivation to study dentistry in Malaysia: an analysis using confirmatory factor analysis
    Musa MF, Bernabé E, Gallagher JE
    Hum Resour Health, 2015;13:47.
    PMID: 26066801 DOI: 10.1186/s12960-015-0040-4
    INTRODUCTION: Malaysia has experienced a significant expansion of dental schools over the past decade. Research into students' motivation may inform recruitment and retention of the future dental workforce. The objectives of this study were to explore students' motivation to study dentistry and whether that motivation varied by students' and school characteristics.
    METHODS: All 530 final-year students in 11 dental schools (6 public and 5 private) in Malaysia were invited to participate at the end of 2013. The self-administered questionnaire, developed at King's College London, collected information on students' motivation to study dentistry and demographic background. Responses on students' motivation were collected using five-point ordinal scales. Confirmatory factor analysis (CFA) was used to evaluate the underlying structure of students' motivation to study dentistry. Multivariate analysis of variance (MANOVA) was used to compare factor scores for overall motivation and sub-domains by students' and school characteristics.
    RESULTS: Three hundred and fifty-six final-year students in eight schools (all public and two private) participated in the survey, representing an 83% response rate for these schools and 67% of all final-year students nationally. The majority of participants were 24 years old (47%), female (70%), Malay (56%) and from middle-income families (41%) and public schools (78%). CFA supported a model with five first-order factors (professional job, healthcare and people, academic, careers advising and family and friends) which were linked to a single second-order factor representing overall students' motivation. Academic factors and healthcare and people had the highest standardized factor loadings (0.90 and 0.71, respectively), suggesting they were the main motivation to study dentistry. MANOVA showed that students from private schools had higher scores for healthcare and people than those in public schools whereas Malay students had lower scores for family and friends than those from minority ethnic groups. No differences were found by age, sex, family income and school type.
    CONCLUSION: Using CFA, this study shows that academic factors were the main motivation to study dentistry in this group of Malaysian students. There were also variations in students' motivation by students' ethnicity and school sector but not by other factors.
    Matched MeSH terms: Factor Analysis, Statistical
  19. Fulltext The development and validation of the Osteoporosis Prevention and Awareness Tool (OPAAT) in Malaysia
    Toh LS, Lai PS, Wu DB, Wong KT, Low BY, Anderson C
    PLoS One, 2015;10(5):e0124553.
    PMID: 25938494 DOI: 10.1371/journal.pone.0124553
    Objectives: To develop and validate Osteoporosis Prevention and Awareness Tool (OPAAT) in Malaysia.
    Methods: The OPAAT was modified from the Malaysian Osteoporosis Knowledge Tool and developed from an exploratory study on patients. Face and content validity was established by an expert panel. The OPAAT consists of 30 items, categorized into three domains. A higher score indicates higher knowledge level. English speaking non-osteoporotic postmenopausal women 50 years of age and pharmacists were included in the study.
    Results: A total of 203 patients and 31 pharmacists were recruited. Factor analysis extracted three domains. Flesch reading ease was 59.2. The mean±SD accuracy rate was 0.60±0.22 (range: 0.26-0.94). The Cronbach’s α for each domain ranged from 0.286-0.748. All items were highly correlated (Spearman’s rho: 0.761-0.990, p<0.05), with no significant change in the overall test-retest scores, indicating that OPAAT has achieved stable reliability. Pharmacists had higher knowledge score than patients (80.9±8.7vs63.6±17.4, p<0.001), indicating
    that the OPAAT was able to discriminate between the knowledge levels of pharmacists and patients.
    Conclusion: The OPAAT was found to be a valid and reliable instrument for assessing patient’s knowledge about osteoporosis and its prevention in Malaysia. The OPAAT can be used to identify individuals in need of osteoporosis educational intervention.
    Study site:: Primary care clinic, tertiary hospital, Malaysia
    Matched MeSH terms: Factor Analysis, Statistical
  20. Do the Chinese somatize depression? A cross-cultural study
    Parker G, Cheah YC, Roy K
    Soc Psychiatry Psychiatr Epidemiol, 2001 Jun;36(6):287-93.
    PMID: 11583458
    A large literature argues for the Chinese--whether in mainland China or elsewhere--being highly likely to express depression somatically, leading to predictable detection and diagnostic difficulties. If true, detection might be assisted if a set of somatic proxies of depression were identified, and this was the principal initial objective in mounting this study.
    Matched MeSH terms: Factor Analysis, Statistical
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