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Psychometric assessment of the short-form Child Perceptions Questionnaire: an international collaborative study

Thomson WM, Foster Page LA, Robinson PG, Do LG, Traebert J, Mohamed AR, et al.

Community Dent Oral Epidemiol, 2016 12;44(6):549-556.
PMID: 27477903 DOI: 10.1111/cdoe.12248

OBJECTIVE: To examine the factor structure and other psychometric characteristics of the most commonly used child oral-health-related quality-of-life (OHRQoL) measure (the 16-item short-form CPQ11-14 ) in a large number of children (N = 5804) from different settings and who had a range of caries experience and associated impacts.
METHODS: Secondary data analyses used subnational epidemiological samples of 11- to 14-year-olds in Australia (N = 372), New Zealand (three samples: 352, 202, 429), Brunei (423), Cambodia (244), Hong Kong (542), Malaysia (439), Thailand (220, 325), England (88, 374), Germany (1055), Mexico (335) and Brazil (404). Confirmatory factor analysis (CFA) was used to examine the factor structure of the CPQ11-14 across the combined sample and within four regions (Australia/NZ, Asia, UK/Europe and Latin America). Item impact and internal reliability analysis were also conducted.
RESULTS: Caries experience varied, with mean DMFT scores ranging from 0.5 in the Malaysian sample to 3.4 in one New Zealand sample. Even more variation was noted in the proportion reporting only fair or poor oral health; this was highest in the Cambodian and Mexican samples and lowest in the German sample and one New Zealand sample. One in 10 reported that their oral health had a marked impact on their life overall. The CFA across all samples revealed two factors with eigenvalues greater than 1. The first involved all items in the oral symptoms and functional limitations subscales; the second involved all emotional well-being and social well-being items. The first was designated the 'symptoms/function' subscale, and the second was designated the 'well-being' subscale. Cronbach's alpha scores were 0.72 and 0.84, respectively. The symptoms/function subscale contained more of the items with greater impact, with the item 'Food stuck in between your teeth' having greatest impact; in the well-being subscale, the 'Felt shy or embarrassed' item had the greatest impact. Repeating the analyses by world region gave similar findings.
CONCLUSION: The CPQ11-14 performed well cross-sectionally in the largest analysis of the scale in the literature to date, with robust and mostly consistent psychometric characteristics, albeit with two underlying factors (rather than the originally hypothesized four-factor structure). It appears to be a sound, robust measure which should be useful for research, practice and policy.

Matched MeSH terms: Factor Analysis, Statistical
Fulltext The application of factor analysis to identify sources in Klang Valley aerosol

Shamsiah A. Rahman, Mohd Suhaimi Hamzah, Abdul Khalik Wood, Md Suhaimi Elias, Nazaratul Ashifa Abdullah Salim, Ezwiza Sanuri

Journal of Nuclear and Related Technologies, 2009;2009(1):288-296.
MyJurnal

Chemical composition of fine (PM2.5) aerosol samples collected for the 5 years period (2001- 2005) using Gent Stacked filter unit sampler at Klang Valley (3 o 10 ’ 30 ’’ N, 101 o 43 ’ 24 ’’ E) were analysed using Neutron Activation Analysis (NAA) and Proton Induced X-ray Emission (PIXE). Results of the study show that the major component of the fine aerosol was black carbon and sulfur with the mass concentration ranged from 4.4 - 6.7µg m -3 and 1.2 - 1.9µg m -3 , respectively. The total fine aerosol mass concentration were in the ranged of 25 - 31µg m -3 with the reconstructed mass was about 50% as relative to the gravimetric mass. Statistical method, factor analysis with varimax approach has been applied to the aerosol composition data for the fingerprint identification. The analysis produces five identified fingerprint represent soil, industry, motor vehicles/biomass burning and Pb and Zn sources. There is also an unidentified source that could be related to unknown industrial activities.

Matched MeSH terms: Factor Analysis, Statistical
Fulltext An examination of the factorial and convergent validity of four measures of conspiracist ideation, with recommendations for researchers

Swami V, Barron D, Weis L, Voracek M, Stieger S, Furnham A

PLoS One, 2017;12(2):e0172617.
PMID: 28231266 DOI: 10.1371/journal.pone.0172617

A number scales have been developed to measure conspiracist ideation, but little attention has been paid to the factorial validity of these scales. We reassessed the psychometric properties of four widely-used scales, namely the Belief in Conspiracy Theories Inventory (BCTI), the Conspiracy Mentality Questionnaire (CMQ), the Generic Conspiracist Beliefs Scale (GCBS), and the One-Item Conspiracy Measure (OICM). Eight-hundred-and-three U.S. adults completed all measures, along with measures of endorsement of 9/11 and anti-vaccination conspiracy theories. Through both exploratory and confirmatory factor analysis, we found that only the BCTI had acceptable factorial validity. We failed to confirm the factor structures of the CMQ and the GBCS, suggesting these measures had poor factorial validity. Indices of convergent validity were acceptable for the BCTI, but weaker for the other measures. Based on these findings, we provide suggestions for the future refinement in the measurement of conspiracist ideation.

Matched MeSH terms: Factor Analysis, Statistical
Fulltext Validation and Psychometric Properties of Bahasa Malaysia Version of the Depression Anxiety And Stress Scales (DASS) Among Diabetic Patients

Ramli, M., Salmiah, M.A., Nurul Ain, M.

Malaysian Journal of Psychiatry, 2009;18(2):1-6.
MyJurnal

Background: Having a validated questionnaire in any field would nurture a research path in that particular area. The aim of this study was to validate the Depression Anxiety Stress Scales 21-item (DASS-21) Bahasa Malaysia (BM) version among clinical subjects who were diabetic patients. Objectives: To determine the reliability and construct validity of the BM DASS by looking at internal consistency and exploratory factor analysis respectively. Methods: The BM DASS was administered to a total of 153 diabetic patients. These patients were selected when they came to 15 retail pharmacies all over the Klang Valley. Results: The BM DASS-21 had very good Cronbach’s alpha values of 0.75, 0.74 and 0.79, respectively for depression, anxiety and stress subscales. For construct validity, it also had good factor loading values for 17 out of 21 items (.31 to .75). Conclusions: The results of this study entrenched the evidence that the BM DASS-21 had excellent psychometric properties and therefore it is suitable to be used for the Malaysian clinical population.

Matched MeSH terms: Factor Analysis, Statistical
Fulltext Chinese Public Attitudes Toward Epilepsy (PATE) scale: translation and psychometric evaluation

Kheng, Seang Lim, Wan, Yuen Choo, Wu, Cathie, Hills, Micheal D., Chong, Tin Tan

Neurology Asia, 2013;18(3):261-270.
MyJurnal

Introduction: None of the quantitative scale for public attitudes toward epilepsy was translated to Chinese language. This study aimed to translate and test the validity and reliability of a Chinese version of the Public Attitudes Toward Epilepsy (PATE) scale. Methods: The translation was performed according to standard principles and tested in 140 Chinese-speaking adults aged more than 18 years for psychometric validation. Results: The items in each domain had similar standard deviations (equal item variance), ranged from 0.85-0.95 in personal domain and 0.75-1.04 in general domain. The correlation between an item and its domain was 0.4 and above for all, and higher than the correlation with the other domain. Multitrait analysis showed the Chinese PATE had a similar variance, floor and ceiling effects, and relative relationship between the domains, as the original PATE. The Chinese PATE scale showed a similar correlation with almost all demographic variable except age. Item means were generally clustered in the factor analysis as hypothesized. The Cronbach’s α values was within acceptable range (0.773) in the personal domain and satisfactory range (0.693) in the general domain. Conclusion: The Chinese PATE scale is a validated and reliable translated version in measuring the public attitudes toward epilepsy.

Matched MeSH terms: Factor Analysis, Statistical
Fulltext Validation of Noise Induced Hearing Loss Questionnaire Among Malay Sawmill Workers in Kelantan Malaysia

Razman, M.R., Naing, L., Kamarul, I.M.

International Medical Journal Malaysia, 2010;9(2):51-56.
MyJurnal

Introduction: Exposure to excessive noise is the major avoidable cause of permanent hearing impairment. Sawmill is one of the workplaces where workers are exposed to hazardous noise level. This study was conducted to determine the reliability and validity of noise-induced hearing loss questionnaire among sawmill workers. Materials and Methods: This cross sectional study was conducted in March 2007 among 35 consented sawmill workers. A total of 40 items; 10 items for knowledge (8 areas), 20 items for attitude (7 areas) and 10 items for practice (2 areas) were assessed. Statistical analysis for reliability analysis was test by internal consistency and construct validity by exploratory factor analysis using principal components and Varimax rotation method. Results: Cronbach’s alpha coefﬁ cients were acceptable for attitude (0.90) and practice
(0.75). However, it was low for knowledge (0.67). Exploratory factor analysis showed three meaningful exploratory factors that could explain the three dimensions in the questionnaire. Conclusion: The results of the validation study suggested that the noise-induced hearing loss questionnaire is reliable and valid tool for assessing knowledge, attitude and practice among sawmill workers.

Matched MeSH terms: Factor Analysis, Statistical
Fulltext Reliability and validity of the adult learning inventory among medical students

Muhamad Saiful Bahri Yusoff

Education in Medicine Journal, 2011;3(1):22-31.
MyJurnal

Objective: To determine the internal consistency and construct validity of the Adult Learning Inventory (AL-i) among first year medical students in a Malaysian medical school. Methods: Cross sectional study was done on 196 first year medical student in Universiti Sains Malaysia (USM). The Cronbach’s alpha reliability analysis, exploratory factor analysis and confirmatory factor analysis were applied to measure internal consistency and construct validity of the AL-i respectively. These analyses were done using Predictive Analytics SoftWare (PASW) version 18 and Analysis of Moment Structure (AMOS) version 19. Result: A total of 196 medical students responded to this study. Exploratory factor analysis showed that two potential constructs would be extracted from the inventory. The confirmatory factor analysis showed the two factor model with six items had a good fit with the latent constructs (X2 (df) = 25.63 (8), p = 0.048, RMR = 0.045, GFI = 0.974, AGFI = 0.933, NFI = 0.974, RFI = 0.951, IFI = 0.987, TLI = 0.975, CFI = 0.987, RMSEA = 0.07). Each domain of the final model of the AL-i has three items. The Cronbach’s alpha value of the AL-i was 0.72. The Cronbach’s alpha values of andragogy and pedagogy domains were 0.87 and 0.86 respectively. Composite Reliability and Average Variance Extracted values were more than 0.6 and 0.5 respectively indicating good construct reliability and adequate convergent validity. Conclusion: This study suggested that the two factor model with 6 items of the AL-i has a good fit and shown good psychometric values. It is a valid and reliability measurement to determine types of leaner among first year medical students.

Matched MeSH terms: Factor Analysis, Statistical
Fulltext Confirmatory factor analysis (CFA) of USM Emotional Quotient Inventory (USMEQ-i) among medical degree program applicants in Universiti Sains Malaysia (USM)

Wan Nor Arifin, Muhamad Saiful Bahri Yusoff, Nyi Nyi Naing

Education in Medicine Journal, 2012;4(2):26-44.
MyJurnal

Introduction: Emotional intelligence (EI) is deemed an important aspect of being good medical doctors. Universiti Sains Malaysia (USM) Emotional Quotient Inventory (USMEQ-i) is an EI inventory in Malay language developed primarily as medical student selection tool in USM. Although it was already validated by exploratory factor analysis (EFA), EFA is considered insufficient evidence of construct validity, thus confirmatory factor analysis (CFA) was conducted. Objectives: To determine measurement model validity and construct validity of USMEQ-i among medical degree program applicants in USM by CFA. Methods: USMEQ-i data file for medical degree program applicants in USM for year 2010/2011 and 2011/2012 academic sessions were obtained from Medical Education Department in USM. A random sample of 512 cases was drawn from the data file. Of the sample, only 453 cases were valid study sample after preliminary data screening and assumption checking. CFA was conducted on the sample using maximum likelihood (ML) estimation with bootstrapping technique due to violation of multivariate normality assumption. USMEQ-i measurement model was proposed as a second-order EI factor with seven first-order factors of EI and a Faking Index (FI) factor, with correlation between second-order EI factor and FI factor. Results: The proposed model could not be fit into the study sample data. EI factors and FI factor had to be analyzed separately due to non-positive definite problem. After modifications to the model, CFA of EI factors were suggestive of two-factor model instead of the proposed seven-factor model. Consciousness, Maturity and Control (CoMaCt). CFA of FI factor maintained one-factor model and also valid in term of construct. Conclusion: The modified USMEQ-i, which consisted of separate EI and FI models, was proven to have valid measurement models and reliable constructs. It is considered to be suitable for use among applicants to medical degree program in USM. However, its use as medical student selection tool may require further research, especially how predictive USMEQ-i scores with real performance of medical students, generalizability of the inventory and its stability over time.

Matched MeSH terms: Factor Analysis, Statistical
Fulltext A confirmatory factor analysis study on the medical student stressor questionnaire among Malaysian medical students

Muhamad Saiful Bahri Yusoff

Education in Medicine Journal, 2011;3(1):44-53.
MyJurnal

Objective: To determine the construct validity, convergent validity, construct reliability and internal consistency of the Medical Student Stressor Questionnaire (MSSQ) among first-year medical students in Malaysia. Methods: A multicenter cross-sectional study was done on 375 medical students of four medical schools in Malaysia. The confirmatory factor analysis and reliability analysis were applied to measure construct validity, construct reliability and internal consistency of the MSSQ. These analyses were done using Predictive Analytics SoftWare (PASW) version 18 and Analysis of Moment Structure (AMOS) version 19. The Composite Reliability and Average Variance Extracted of the final constructs were calculated manually to determine construct reliability and convergent validity. Results: A total of 359 (95.7%) medical students responded to this study. The confirmatory factor analysis showed the six factor model with 20 items had a good fit with the latent constructs (X2 (df) = 258.02 (155), p < 0.001, RMR = 0.055, GFI = 0.933, AGFI = 0.910, NFI = 0.931, RFI = 0.916, IFI = 0.971, TLI = 0.965, CFI = 0.971, RMSEA = 0.043). The Cronbach’s alpha value of the MSSQ was 0.92. The Cronbach’s alpha values of the six constructs were more than 0.7. Composite Reliability and Average Variance Extracted values of the six constructs were more than 0.6 and 0.5 respectively indicating good construct reliability and adequate convergent validity. Conclusion: This study suggested that the six factor model with 20 items of the MSSQ had a good fit and shown good psychometric values. It is a valid and reliability measurement to identify stressors among medical students across institutions in Malaysia.

Matched MeSH terms: Factor Analysis, Statistical
Fulltext Psychometric properties of the learning approach inventory: a confirmatory factor analysis

Muhamad Saiful Bahri Yusoff

Education in Medicine Journal, 2011;3(2):24-31.
MyJurnal

Objective: To determine the internal consistency and construct validity of the Learning Approach Inventory (LA-i) among first year medical students in a Malaysian medical school. Methods: Cross sectional study was done on 196 first year medical students in Universiti Sains Malaysia (USM). The items of the LA-i were framed based on characteristics of three learning approaches. The Cronbach’s alpha reliability analysis, exploratory factor analysis and confirmatory factor analysis were applied to measure internal consistency and construct validity. These analyses were done using Predictive Analytics SoftWare (PASW) version 18 and Analysis of Moment Structure (AMOS) version 19. The Composite Reliability (CR) and Average Variance Extracted (AVE) were calculated manually to measure construct reliability and convergent validity. Result: A total of 196 medical students responded to this study. Exploratory factor analysis showed that three potential constructs were extracted from the inventory. The confirmatory factor analysis showed the three factor model with nine items had a good fit with the latent constructs (X2(df) = 26.07 (20), p = 0.163, RMR = 0.04, GFI = 0.969, AGFI = 0.93, NFI = 0.967, RFI = 0.941, IFI = 0.992, TLI = 0.985, CFI = 0.992, RMSEA = 0.04). Each domain of the final model of the LA-i has three items. The Cronbach’s alpha value of the AL-i was 0.86. The Cronbach’s alpha values of surface, strategic and deep approach domains were 0.62, 0.73 and 0.88 respectively. Most of learning approach domains had Composite Reliability and Average Variance Extracted values were more than 0.6 and 0.5 respectively indicating good construct reliability and adequate convergent validity. Conclusion: This study suggested that the three factor model with 9-items of the LA-i has a good fit and shown good psychometric values. It is a valid and reliability measurement to determine learning approaches among first year medical students.

Matched MeSH terms: Factor Analysis, Statistical
Fulltext Cross-Cultural Adaptation And Validation Of The Bahasa Malaysia Version Of The Eating Disorder Examination Questionnaire (Ede-Q)

Ramli, M., Jamaiyah, H., Noor Azimah, M., Khairani, O., Adam, B.

Malaysian Journal of Psychiatry, 2008;17(2):1-8.
MyJurnal

Introduction: As eating disorders such as anorexia nervosa and others are generally becoming more prevalent, it is essential to have a culturally accepted and locally validated questionnaire that is able to detect abnormal eating habits. Objective: To translate the Eating Disorders Examination Questionnaire (EDE-Q) into Bahasa Malaysia (BM) and to determine the construct validity, reliability and other psychometric properties of the BM version. Method: Two parallel forward and backward translations were done in BM in accordance to guideline. Its validation was determined by using confirmatory factor analysis among 298 secondary school children. Results: The BM EDE-Q had very good internal consistency with global Cronbach’s alpha value of 0.879. For construct validity, majority of the items managed to produce values of more than 0.4 for confirmatory factor analysis with four unforced distinct factors detected. Conclusions: Analyses of reliability and validity of this BM version of EDE-Q yielded satisfactory results. The BM version produced in this study had good psychometric properties and it is applicable to the Malaysian population. Findings indicated that cultural factors in eating habits certainly influences the effort to adapt the questionnaire within a Malaysian setting.

Matched MeSH terms: Factor Analysis, Statistical
Fulltext Designing a culture, language and illness-specific self-esteem scale in Bahasa Malaysia

Hasanah Che Ismail, Shamshunnisah Abu Bakar

ASEAN Journal of Psychiatry, 2009;10(2):100-114.
MyJurnal

Objective: Self-esteem is an important component of psychological health. In Malaysia, Rosenberg’s self-esteem scale remained the single most popular utilized scale for studying global self-esteem. This study aims to design a language, culture and illness specific self-esteem questionnaire. Methods: The study consisted of 2 phases. The first phase was to generate items for the new self-esteem questionnaire (SSES) in Bahasa Malaysia. Literature review on the concept of selfesteem and its’ content was conducted. This was followed by expert opinion from professional care-givers. The items were qualitatively validated by healthy subjects and patients with schizophrenia from the same locality, culture and language. The second phase consists of quantitative validation of the items. Items in the new scale were analyzed based on the responses from 165 stable schizophrenia outpatients. The validated Malay version of Rosenberg Self-Esteem scale (RSES) was used concurrently as a comparison. Results: The SSES displayed good internal consistency for its two domains
(Cronbach’s alpha=0.88, 0.81) and test-retest reliability (ICC), ranged from 0.44 to 0.87. Its construct validity was confirmed by confirmatory factor analysis. The concurrent validity of SSES and RSES using Pearson correlation was 0.77. The Cronbach’s alpha for the validated Malay version of RSES is 0.67. Conclusion: This study presents a new self-esteem questionnaire (SSES) which has high concurrent validity with the standard RSES and confirms the reliability and validity of SSES in Malay patients with Schizophrenia.

Study site: Psychiatric clinic, Hospital Universiti Sains Malaysia (HUSM), Kelantan and Hospital Kota Bharu, (HKB), Kelantan

Matched MeSH terms: Factor Analysis, Statistical
Fulltext Validation of the Malay version of auditory verbal learning test (MVAVLT) among schizophrenia patients in Hospital Universiti Sains Malaysia (HUSM), Malaysia

Zahiruddin Othman, Muhammad Najib Muhammad Alwi, Kamarul Imran Musa, Muhammad Najib Muhammad Alwi, Ruzita Jamaluddin

ASEAN Journal of Psychiatry, 2009;10(1):54-74.
MyJurnal

Objective: Many studies have emphasized the significance of verbal memory for the functional outcome in schizophrenia. A preserved capability to encode and recall verbal information is essential for the long-term efficacy of psychoeducational programs and other
psychological intervention to ensure the successful transfer of newly acquired skills or knowledge into everyday life. Aims of this study aimed to validate the MVALT among schizophrenia patients in HUSM. Methods: The subjects were 15 schizophrenia patients
conveniently selected from the patients that attended follow up at the psychiatry clinic in HUSM or inpatients who have been admitted during the study period and 15 healthy control subjects as a comparison. Reliability and validity of the MVAVLT were analyzed. Results: The validation study showed that the Malay version Auditory Verbal Learning Test (MVAVLT) had a good validity (factor analysis 0.66 to 0.98) and test-retest reliability (pearson correlation ranged from 0.24 to 0.84) and has been shown to be sensitive in
discriminating between normal and schizophrenia patients. In line with the previous research, the schizophrenia patients performed significantly worse than healthy control in all indexes measured in MVAVLT. Conclusion: The screening of deficits in verbal learning
and memory among the schizophrenia patients is important, for early detection and treatment since it can be helpful for clinicians and psychologists in their counseling sessions. Subsequently, it helps patients to reduce such cognitive difficulties and their impact by using specific rehabilitation with the usage of newer antipsychotic agents.

Matched MeSH terms: Factor Analysis, Statistical
Fulltext Factorial validity of the Malay-translated version of the McLean Screening Instrument for Borderline Personality Disorder (MSI-BPD) for use among female prisoner

Nurul Hazrina, M., Affizal, A.

Malaysian Journal of Psychiatry, 2012;21(2):0-0.
MyJurnal

Background: Personality disorders is one of the most assessed mental health problems among prison population. To date, no local psychometric instrument to assess personality disorder is available in Malaysia. Objective: The aim of this study is to validate the Malay-translated version of the McLean Screening Instrument for Borderline Personality Disorder (MSI-BPD) among prisoner. Methods: A cross-sectional study was designed, involving female prisoners (n=90). Face validity, factor analysis, and reliability testing were conducted with a one-week interval test-retest. Results: The translated instrument produced four factors structure. The internal consistency is moderate (α=.64), with high test-retest reliability (ICC=.82). Conclusion: The Malay-translated version of the MSI-BPD was found valid and reliable to identify borderline personality disorder among female prisoner in future studies.

Matched MeSH terms: Factor Analysis, Statistical
Fulltext Perceived social support among university students in Malaysia: a reliability study

Talwar, P., Mohd Fadzil, A.R.

Malaysian Journal of Psychiatry, 2013;22(1):1-8.
MyJurnal

Background: Social support is the perception that one is cared for, has assistance available from friends and significant others. Social support can be measured by The Multidimensional Scale of Perceived Social Support. This scale has been widely used and validated in different languages. Objective: To determine the factor structure of The Multidimensional Scale of Perceived Social Support scale and find its reliability. Method: The study was conducted in one of the Universities in Malaysia. The undergraduate students who volunteered to participate in the study were explained about the purpose of the study and implications. The English version of Multidimensional Scale of Perceived Social Support scale (MSPSS) that was administered. In all 313 undergraduate students were studied. Exploratory factor analysis, with varimax rotation, was applied to the data Results: The three factor solution accounted for 80.51 % of the total variance. The procedure output has an overall alpha of 0.921. Conclusion: The MSPSS appears to be good enough to be used in Malaysia however more studies are required.

Matched MeSH terms: Factor Analysis, Statistical
Fulltext Psychometric properties of the Medical Student Wellbeing Index at different interval of measurements in a cohort of medical students

Muhamad Saiful Bahri Yusoff, Mohd Jamil Yaacob, Naing, Nyi Nyi, Ab Rahman Esa

Education in Medicine Journal, 2013;5(4):21-28.
MyJurnal

Background: One of important educational climate roles is to provide an environment that promotes positive development of medical students' psychological wellbeing during training. Unfortunately, many studies have reported that educational climate in medical education are not favourable to them. Therefore, it is a real need for a simple, valid, reliable and stable tool that will help medical schools to screen psychological wellbeing of their students so that early intervention could be done.
Objective: This study aimed to explore the psychometric properties of the Medical Student Wellbeing Index (MSWBI) to measure psychological wellbeing at different interval of measurements in a cohort of medical students.

Method: A prospective study was done on a cohort of medical students. MSWBI was administered to the medical students at five different intervals. The confirmatory factor analysis, Cronbach's alpha and intra-class correlation analysis were applied to measure construct validity, internal consistency and agreement level at different interval of measurements.

Result: A total of 153 (89.5%) medical students responded completely to the MSWBI. The MSWBI showed that the one-factor model had acceptable values for most of the goodness of fit indices signified its construct was stable across multiple measurements. The overall Cronbach's alpha values for the MSWBI at the five measurements ranged between 0.69 and 0.78. The ICC coefficient values for the MSWBI total score was 0.58 to 0.59.

Conclusion: This study found that the MSWBI had stable psychometric properties as a screening tool for measuring psychological wellbeing among medical students at different time and occasions. Continued research is required to refine and verify its psychometric credentials at different educational settings.

Matched MeSH terms: Factor Analysis, Statistical
Fulltext A unidimensional scale for self-control within Malaysian settings

Mohammad Rahim Kamaluddin, Nadiah Syariani Md. Shariff, Geshina Ayu Mat Saat

Education in Medicine Journal, 2013;5(4):60-66.
MyJurnal

Introduction: Crime is an immoral act capable of tearing the well-being of society and the nation. Various factors have been accredited as potential factors for crime engagement for example natural inclination, nurture or a combination of these factors. Within the domain of natural inclination, lack of self-control is often viewed as the primary cause of crime and delinquency. However, there are no valid and reliable Malay language psychometric instruments to measure the level of self-control among Malaysians.
Objective: The aim of this study was to validate the Self Control Scale (SCS) for use among Malay speaking populations. Henceforth the Malay language version is identified as SCS-M.
Method: A cross-sectional study was carried out on 150 inmates incarcerated within two prisons in Peninsular Malaysia in June 2012. Forward and Backward translations of the original SCS were carried out followed by content and face validation processes. Exploratory factor analysis and Cronbach's Alpha reliability analysis were performed.
Result: Both content and face validation processes showed promising and good outcomes. Preliminary analysis for factor analysis supported factorability of the items. The factor loadings of SCS-M items did not correspond to the original six SCS dimensions. Since SCS is often administered as a unidimensional scale, a forced one factor analysis was performed and items with factor loadings exceeding 0.3 were retained. The result of internal consistency reliability of SCS-M demonstrated a good Cronbach's alpha value of 0.80.
Conclusion: The findings supported that SCS-M is a valid and reliable unidimensional scale to measure the level of self-control among Malay speaking populations. It is anticipated that the emergence of SCS-M is vital for self-control assessment, treatment, and rehabilitation purposes.

Matched MeSH terms: Factor Analysis, Statistical
Fulltext Validation of the Malay-translated version of the center for epidemiological study - depression scale (CES-D)

Nurul Hazrina Mazlan, Affizal Ahmad

ASEAN Journal of Psychiatry, 2014;15(1):54-65.
MyJurnal

Objective: This study aims to establish the validity and reliability of the Malay- translated version of the CES-D. Methods: This study employed a cross-sectional study design. The participants were female inmates (n=90) from local prisons which were selected based on purposive-selective sampling. The analyses include face validation, factor analysis, and reliability testing. A test-retest was conducted within a one-week interval. Results: The mean score for depression among the participants is 18.97 (SD=6.51). Further descriptive analysis showed that 58.9% of them scored above the mean score, which is considered high. Preliminary construct validation analysis confirmed that factor analysis was appropriate for the Malay-translated version of the CES-D. Furthermore, the factor analysis showed similar factor loadings to the original English version. The total internal consistency of the translated version, which was measured by Cronbach’s alpha coefficient, was equal to 0.75. The test-retest reliability of the total score, measured by Pearson’s correlation was equal to 0.69. Conclusions: Face validity, construct validity, and reliability analysis were found satisfactory for the Malay-translated version of the CES-D. The Malay-translated version of the CES-D was found valid and reliable to be used in future studies, with comparable properties to the original version and to previous studies. ASEAN Journal of Psychiatry, Vol. 15 (1): January - June 2014: 54-65.

Matched MeSH terms: Factor Analysis, Statistical
Fulltext The beck anxiety inventory for Malays (BAI-Malay): a preliminary study on psychometric properties

Firdaus, M., Nor Sheereen, Z.

Malaysian Journal of Medicine and Health Sciences, 2011;7(1):75-81.
MyJurnal

Introduction: The purpose of the present study was to investigate exploratory factor analysis of the
Beck Anxiety Inventory (BAI) and reports its reliability and validity in Malaysia. Method: One thousand
and ninety participants from four different samples (namely students, general population, medical and
psychiatric patients) completed the Malay version of Beck Anxiety Inventory, as well as additional
questionnaires such as Fear Questionnaire, Anxiety Sensitivity Index, Depression Anxiety Stress Scale, and Catastrophic Cognition Questionnaire. Results: Exploratory factor analysis revealed a three factor solution and accounted for 48.01% of the total variance. The three-factor structure appeared to be; subjective anxiety, autonomic, and neurophysiology. The Cronbach alpha coefficients (α) ranged from 0.66 to 0.89 with satisfactory overall alpha value (.91). Evidence was also found acceptable concurrent validity of the BAI-Malay (range between r=.22 to r=.67). Conclusion: This study shows that the BAIMalay is a reliable and valid instrument to measure symptoms of anxiety in the Malay population
and can be used in research and clinical service in Malaysia. However, replication of study by using
confirmatory factor analysis and application of the instrument among anxiety patients worth of further
investigation.

Matched MeSH terms: Factor Analysis, Statistical
Cultural Adaptations to the Measurement of Attitudes to Ageing: Psychometric Assessment of the Malay Reactions to Ageing Questionnaire

Faudzi FNM, Armitage CJ, Bryant C, Brown LJE

Assessment, 2020 09;27(6):1272-1284.
PMID: 29649886 DOI: 10.1177/1073191118766400

The aims of this study were to culturally adapt the Reactions to Ageing Questionnaire (RAQ) for a non-Western (Malay) population, and explore attitudes to ageing in relation to age, gender, and education. Eight new culturally relevant items were generated by asking Malay-speaking participants about their reactions to ageing. A Malay version of the extended 35-item RAQ was then administered to 911 Malaysian participants aged 18 to 60 years. Exploratory factor analysis revealed four factors. Three of the factors were similar to those identified in the original RAQ, while "Family and Religion" emerged as a new factor. More negative attitudes to ageing were observed in younger and female respondents. There were no effects of education. This culturally adapted RAQ exhibits robust psychometric properties, and could be used to assess attitudes to ageing in Malaysia and other Southeast Asian countries. Moreover, we have identified a "core set" of RAQ items that could be applicable worldwide.

Matched MeSH terms: Factor Analysis, Statistical

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