scholarly journals Psychometric Assessment of the PPDG: Utilizing Cronbach's Alpha as a Means of Reliability

2013 ◽  
Vol 4 (1) ◽  
Author(s):  
Lisa R Marr-Lyon ◽  
Gireesh V Gupchup ◽  
Joe R Anderson
Keyword(s):  
Goal Setting ◽  
Item Analysis ◽  
Internal Consistency Reliability ◽  
Original Research ◽  
General Factor ◽  
Cronbach’S Alpha ◽  
Cronbach's Alpha ◽  
Mean Centering ◽  
The Mean ◽  
The Individual

Introduction: Since the development of the 10 item Purdue Pharmacist Directive Guidance (PPDG) Scale several studies of the psychometric properties of the PPDG have been conducted. Although Cronbach's alpha was calculated as a means of internal consistency reliability, a demonstration of the mean centering of the individual items from the instrument were not explored. Objectives: This study focused on investigating the mean stabilization of items within the PPDG as they pertain to Cronbach's reliability coefficient calculation. Methods: Using item analysis procedures in SPSS, the mean stability of items within the general factor of directive guidance and subscales of instruction and feedback and goal setting were examined for the PPDG. Results: Mean stability scores for entire PPDG scale and the subscales of instruction and feedback and goal setting were strong. Also, corrected item-total correlations and Cronbach's alphas following item deletion were good for the overall PPDG scale and the subscales. Conclusions: The results provide evidence to enhance understanding of the psychometric stability of the PPDG scale and its subscales.   Type: Original Research

scholarly journals On Cronbach’s Alpha as the Mean of All Possible k-Split Alphas

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Matthijs J. Warrens
Keyword(s):  
Internal Consistency ◽  
Internal Consistency Reliability ◽  
Reliability Coefficient ◽  
Coefficient Alpha ◽  
Equal Size ◽  
Cronbach’S Alpha ◽  
Cronbach's Alpha ◽  
The Mean ◽  
The Difference

Coefficient alpha is the most commonly used internal consistency reliability coefficient. Alpha is the mean of all possible k-split alphas if the items are divided into k parts of equal size. This result gives proper interpretations of alpha: interpretations that also hold if (some of) its assumptions are not valid. Here we consider the cases where the items cannot be split into parts of equal size. It is shown that if a k-split is made such that the items are divided as evenly as possible, the difference between alpha and the mean of all possible k-split alphas can be made arbitrarily small by increasing the number of items.

scholarly journals Development of questionnaire on awareness and action towards symptoms and risk factors of heart attack and stroke among a Malaysian population

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Abdullah Abdulmajid Abdo Ahmed ◽  
Abdulkareem Mohammed AL-Shami ◽  
Shazia Jamshed ◽  
Abdul Rahman Fata Nahas
Keyword(s):  
Risk Factors ◽  
Internal Consistency ◽  
Heart Attack ◽  
Pharmacy Practice ◽  
Internal Consistency Reliability ◽  
Cronbach’S Alpha ◽  
Cronbach's Alpha ◽  
The Mean ◽  
Validation Research ◽  
Lay Public

Abstract Background The awareness of symptoms and action towards heart attack and stroke is important to reduce the morbidity and mortality in both developed and developing countries. The aim of this study was to develop a questionnaire on awareness and action towards symptoms and risk factors of heart attack and stroke among lay public in Malaysia. The questionnaire was developed in both English and Bahasa Melayu. Methods Primarily the questions were generated in English. Face and content validity were performed by five experts in Pharmacy Practice and Medicine. A translation as per guidelines into Malay language was performed; followed by face-to-face interview of 96 lay public in Kuantan, Pahang, Malaysia. For internal consistency, reliability was assessed utilizing Cronbach’s alpha. Results The mean ± SD of the awareness and action towards heart attack symptoms and risk factors was 65.52 ± 6.3, with a good internal consistency (Cronbach’s alpha = 0.75), whereas the mean of the awareness and action towards stroke symptoms and risk factors was 61.93 ± 7.11, with an accepted internal consistency (Cronbach’s alpha = 0.86). Conclusion The current validation research showed that the developed questionnaire is valid and reliable for assessing the awareness and action towards symptoms and risk factors of heart attack and stroke among lay public in Malaysia.

scholarly journals Developing a scale: Adolescents’ health choices related rights, duties and responsibilities

2019 ◽  
Vol 26 (7-8) ◽  
pp. 2511-2522
Author(s):  
Tanja Moilanen ◽  
Anna-Maija Pietilä ◽  
Margaret Coffey ◽  
Mari Kangasniemi
Keyword(s):  
Content Validity ◽  
Item Analysis ◽  
Validity And Reliability ◽  
Cronbach’S Alpha ◽  
Validity Index ◽  
Content Validity Index ◽  
Cronbach's Alpha ◽  
Health Choices ◽  
The Individual ◽  
Health Rights

Background: Adolescents’ health choices have been widely researched, but the ethical basis of these choices, namely their rights, duties, and responsibilities, have been disregarded and scale is required to measure these. Objective: To describe the development of a scale that measures adolescents’ rights, duties, and responsibilities in relation to health choices and document the preliminary scale testing. Research design: A multi-phase development method was used to construct the Health Rights Duties and Responsibilities ( HealthRDR) scale. The concepts and content were defined through document analysis, a systematic literature review, and focus groups. The content validity and clarity of the items were evaluated by expert panel of 23 adolescents, school nurses, and researchers. We calculated the content validity index and the content validity ratio at on item and scale levels. Preliminary testing was conducted with 200 adolescents aged 15–16 years. Descriptive statistics, Cronbach’s alpha correlation, and statistics for the item-analysis were calculated. Ethical considerations: Ethical approval and permission were obtained according to national legislation and responsible research practice was followed. Informed consent was obtained from the participants and the parents were informed about the study. Findings: The Health Rights Duties and Responsibilities scale comprises of four sub-scales with 148 items: 15 on health choices, 36 on rights, 47 on duties, and 50 on responsibilities. The items had a 0.93 content validity index and a 0.85 content validity ratio. Cronbach’s alpha correlation coefficient was 0.99 for the total scale and the individual sub-scales scores were health choices (0.93), rights (0.97), responsibilities (0.99), and duties (0.98). Discussion: The findings are discussed in light of the ethical concepts and validity and reliability of the developed scale. Conclusion: The Health Rights Duties and Responsibilities scale defines and understands adolescents’ rights, duties, and responsibilities in relation to health choices and has good content validity. Further testing and refinement of the concepts are needed.

Development and Testing of the Jakubik Mentoring Benefits Questionnaire Among Pediatric Nurses

2012 ◽  
Vol 20 (2) ◽  
pp. 113-122 ◽  
Author(s):  
Louise D. Jakubik
Keyword(s):  
Factor Analysis ◽  
Health Care Organizations ◽  
Internal Consistency Reliability ◽  
Mentoring Relationships ◽  
Staff Nurse ◽  
Pediatric Nurses ◽  
Cronbach’S Alpha ◽  
Organizational Benefits ◽  
Cronbach's Alpha ◽  
The Individual

Background and Purpose: The ability to measure the benefits of mentoring among bedside nurses is essential for leaders in health care organizations to evaluate the effectiveness of mentoring initiatives for nurses. This article describes the development and testing of the Jakubik Mentoring Benefits Questionnaire (Jakubik MBQ). The instrument is a 36-item tool that uses a 5-point Likert scale to measure the individual and organizational benefits of mentoring from the nurse protégé’s perspective. Methods: The original Jakubik MBQ was a 57-item tool developed and validated (validity = .96) with a panel of 6 expert judges prior to reliability testing in a pilot study with 11 subjects (Cronbach’s alpha = .98). Subsequently, the 57-item instrument was used in 3 separate research studies (Jakubik, 2007a, 2007b; Jakubik, Eliades, Gavriloff, & Weese, 2011) with strong internal consistency reliability evidenced by Cronbach’s alpha coefficients of .98, .98, and .97, respectively. Exploratory factor analysis was conducted on the 57-item instrument with the 453 subjects from the aforementioned 3 studies. Results: Results of the factor analysis confirmed a total of 6 factors (subscales). Based on the factor analysis, the 4 original theoretical subscales were confirmed, 2 additional subscales were added, the original subscales were renamed, and the instrument was shortened to 36 items with each subscale containing 6 items and an overall Cronbach’s alpha of .97. Conclusions: Based on these overall findings, the Jakubik MBQ provides a valid and reliable instrument for use in measuring the mentoring benefits among pediatric staff nurse protégés engaged in mentoring relationships.

Modification and Psychometric Testing of the Reminiscence Functions Scale

2009 ◽  
Vol 17 (2) ◽  
pp. 134-147 ◽  
Author(s):  
Gail Washington
Keyword(s):  
Item Analysis ◽  
Psychometric Testing ◽  
Psychometric Evaluation ◽  
Principal Component ◽  
Internal Consistency Reliability ◽  
Self Report ◽  
Cronbach’S Alpha ◽  
Cronbach's Alpha ◽  
Scale Test ◽  
Test Retest Reliability

This article describes the psychometric evaluation of the Modified Reminiscence Functions Scale (MRFS). The 39-item MRFS was validated on a sample of 271 racially diverse older adults. Psychometric analysis included content validity, item analysis, principal component analysis with varimax rotation, test–retest reliability, and internal consistency reliability using Cronbach’s alpha. The model’s structure supports a seven-factor, 39-item scale. Test–retest and Cronbach’s alpha for the instrument were .82 and .94, respectively. The seven-factor scale: self-regard, death, bitterness, intimacy, teach–inform, boredom, and conversation accounted for 61% of variance. Evidence indicates the self-report Likert instrument is a reliable and valid measure of reminiscence functions. Cross-validation with other populations and further research is needed to identify other reminiscence dimensions–functions.

scholarly journals Validation of the Patient-Centred Care Competency Scale Instrument for Finnish Nurses

2021 ◽  
Vol 11 (6) ◽  
pp. 583
Author(s):  
Riitta Suhonen ◽  
Katja Lahtinen ◽  
Minna Stolt ◽  
Miko Pasanen ◽  
Terhi Lemetti
Keyword(s):  
Factor Analysis ◽  
Root Mean Square ◽  
Goodness Of Fit ◽  
Item Analysis ◽  
Healthcare Delivery ◽  
Mean Square ◽  
Cronbach’S Alpha ◽  
Patient Centred Care ◽  
Cronbach's Alpha ◽  
Confirmatory Factor

Patient-centredness in care is a core healthcare value and an effective healthcare delivery design requiring specific nurse competences. The aim of this study was to assess (1) the reliability, validity, and sensitivity of the Finnish version of the Patient-centred Care Competency (PCC) scale and (2) Finnish nurses’ self-assessed level of patient-centred care competency. The PCC was translated to Finnish (PCC-Fin) before data collection and analyses: descriptive statistics; Cronbach’s alpha coefficients; item analysis; exploratory and confirmatory factor analyses; inter-scale correlational analysis; and sensitivity. Cronbach’s alpha coefficients were acceptable, high for the total scale, and satisfactory for the four sub-scales. Item analysis supported the internal homogeneity of the items-to-total and inter-items within the sub-scales. Explorative factor analysis suggested a three-factor solution, but the confirmatory factor analysis confirmed the four-factor structure (Tucker–Lewis index (TLI) 0.92, goodness-of-fit index (GFI) 0.99, root mean square error of approximation (RMSEA) 0.065, standardized root mean square residual (SRMR) 0.045) with 61.2% explained variance. Analysis of the secondary data detected no differences in nurses’ self-evaluations of contextual competence, so the inter-scale correlations were high. The PCC-Fin was found to be a reliable and valid instrument for the measurement of nurses’ patient-centred care competence. Rasch model analysis would provide some further information about the item level functioning within the instrument.

scholarly journals The 8-item Morisky medication adherence scale: validation of a Portuguese version in HIV patients

2020 ◽  
Vol 30 (Supplement_5) ◽  
Author(s):  
A Aguiar ◽  
C Piñeiro ◽  
R Serrão ◽  
R Duarte
Keyword(s):  
Medication Adherence ◽  
Psychometric Properties ◽  
Reliability Analysis ◽  
Cronbach’S Alpha ◽  
Portuguese Version ◽  
Cronbach's Alpha ◽  
Adherence To Medication ◽  
Morisky Medication Adherence Scale ◽  
Adherence Scale ◽  
The Mean

Abstract Background Antiretroviral therapy (ART) has the most effective treatment for people with HIV, but its effectiveness depends on the individual medication adherence. Morisky Medication Adherence Scale (MMAS-8) is one of the most widely used scales to assess patient adherence. Thus, we aimed to validate a Portuguese version of MMAS-8 and determine its psychometric properties in HIV positive patients. Methods A cross-sectional survey was conducted in Centro Hospitalar Universitário São João (Porto, northern Portugal) at the infectious diseases department. After authorization to use the scale - granted by the author - and, a standard forward-backwards procedure to translate MMAS-8 to Portuguese, the questionnaire was applied to 233 patients with HIV doing ART. Reliability was assessed using Cronbach's alpha and test-retest reliability. Three levels of adherence were considered: 0 to < 6 (low), 6 to < 8 (medium), 8 (high). Results In the studied sample, the mean age was 45.03 years (SD = 11.63), 80.3% men, 19.3% women and 1 transgender, and 53.8% had ≤9 years of education. The mean number of prescribed ART per patient was 1.76. The mean score for the medication adherence scale was 7.29 (SD = 6.74). For the reliability analysis, 12 patients were excluded due to missing data (n = 221). Regarding the level of adherence, 22.5% were low adhering, 71.6% medium and 5.9% high. Corrected item-total correlations showed that 1 item does not correlate very well with the overall scale and was dropped. Scale reliability analysis for the remaining 7 items revealed an overall Cronbach's alpha of 0.661. Women had a protective effect on adherence (OR = 0.31;95%CI:0.15-0.66). Number of years doing ART, age of participants, and type of residence didn't show to be correlated with adherence. Conclusions MMAS-8 is a reliable and valid measure to detect patients at risk of non-adherence. A satisfactory Cronbach's alfa (0.661) was obtained. In general, adherence to medication was medium or high. Key messages This scale can be applied nationwide in other different hospitals, as it could serve as a tool for measuring adherence to ART that can allow for better health care to the ones that are low adhering. A Portuguese version of the MMAS-8 was created for measuring adherence to ART that maintained a similar structure to the original MMAS-8 and good psychometric properties.

scholarly journals Validity and reliability of the Noor Evidence-Based Medicine Questionnaire: A cross-sectional study

PLoS ONE ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. e0249660
Author(s):  
Mohd Noor Norhayati ◽  
Zanaridah Mat Nawi
Keyword(s):  
Evidence Based Medicine ◽  
Healthcare Professionals ◽  
High Reliability ◽  
Internal Consistency Reliability ◽  
Evidence Based ◽  
Validity And Reliability ◽  
Cronbach’S Alpha ◽  
Cross Sectional ◽  
Cronbach's Alpha ◽  
Based Medicine

Background Evidence-based medicine (EBM) is a widely accepted scientific advancement in clinical settings that helps achieve better, safer, and more cost-effective healthcare. However, presently, validated instruments to evaluate healthcare professionals’ attitude and practices toward implementing EBM are not widely available. Therefore, the present study aimed to determine the validity and reliability of a newly developed knowledge, attitude, and practice (KAP) questionnaire on EBM for use among healthcare professionals. Methods The Noor Evidence-Based Medicine Questionnaire was tested among physicians in a government hospital between July and August 2018. Exploratory factor analysis and internal consistency reliability-based Cronbach’s alpha statistic were conducted. Results The questionnaire was distributed among 94 physicians, and 90 responded (response rate of 95.7%). The initial number of items in the KAP domains of the Noor Evidence-Based Medicine Questionnaire were 15, 17, and 13, respectively; however, two items in the practice domain with communalities <0.25 and factor loadings <0.4 were removed. The factor structure accounted for 52.33%, 66.29%, and 55.39% of data variance in the KAP domains, respectively. Cronbach’s alpha values were 0.81, 0.81, and 0.84 for KAP domains, respectively, indicating high reliability. Conclusions This questionnaire can be used to evaluate the knowledge, attitudes, and behaviour of healthcare professionals toward EBM. Future testing of this questionnaire among other medical personnel groups will help expand the scope of this tool.

scholarly journals Validation of Sinhala Version of Brief COPE Scale in Patients with Cancer in Sri Lanka

2021 ◽  
Author(s):  
Eranthi Weeratunga ◽  
Chandanie Senadheera ◽  
Manjula Hettiarachchi ◽  
Bilesha Perera
Keyword(s):  
Sri Lanka ◽  
Coping Strategies ◽  
Cronbach’S Alpha ◽  
Maladaptive Coping ◽  
Retest Reliability ◽  
Patients With Cancer ◽  
Cronbach's Alpha ◽  
Brief Cope ◽  
The Mean ◽  
Test Retest Reliability

Abstract Background Coping strategies are essential in the cancer management/recovery process and show an integral part in patients with cancer globally. In Sri Lanka, validated scales to measure coping are scarce. This study was examined the Sinhalese version of the Brief COPE for its psychometric properties. Methods This scale is self-administered (28 items) and consists of adaptive and maladaptive coping strategies; divided into 14 subscales. Cancer patients were registered ‘first come - first serve’ basis using their appointment register at the Radiotherapy Unit, Oncology ward, Teaching Hospital, Karapitiya, Galle, Sri Lanka. They were requested to complete the Sinhalese version of the Brief COPE and demographic details. Test-retest reliability was checked using the same subjects two weeks later. Factorial validity was performed using exploratory factor and principal component analysis. Results were regarded as statistically significant if p < 0.05. Results The mean (±SD) age of the sample was 61(±12) years. The mean adaptive coping (±SD) and maladaptive coping were 37.50 (±8.14) and 17.10 (±2.44) respectively. The internal consistency of the overall scale was good (Cronbach’s alpha - 0.819). Adaptive and maladaptive coping showed a high Cronbach’s alpha (0.861 and 0.396). The test-retest reliability was found to be 0.66. The Sinhala version of BC was found to have a negative correlation with the CES-D scale but was positively correlated with the WHOQOL-BREF questionnaire. Seven factors were extracted. Conclusion The Sinhala version of the Brief COPE is a valid and reliable tool to assess coping strategies among patients with cancer. The findings of this study would let the health authorities get an understanding of coping strategies among patients with cancer; and the impact on cancer victims and family members to relieve their suffering.

Factor structure of Guy’s Neurological Disability Scale in a sample of Dutch patients with multiple sclerosis

2011 ◽  
Vol 17 (12) ◽  
pp. 1498-1503 ◽  
Author(s):  
LB Mokkink ◽  
DL Knol ◽  
BMJ Uitdehaag
Keyword(s):  
Multiple Sclerosis ◽  
Factor Structure ◽  
General Factor ◽  
Cronbach’S Alpha ◽  
Neurological Disability ◽  
Structural Validity ◽  
Cronbach's Alpha ◽  
Disability Scale ◽  
Scale Scores ◽  
Item Factor Analysis

Background: Guy’s Neurological Disability Scale (GNDS) is designed to assess disability (i.e. activity limitations) in patients with multiple sclerosis. It contains 12 functional domains, each indicating a level of disability. Four domain scores and a total score can be calculated. Objective: The aim of this study was to evaluate the structural validity of the GNDS in a Dutch population who were definitely diagnosed as having multiple sclerosis. Methods: Data of 974 patients were available. The structural validity of the GNDS was evaluated by confirmatory item factor analysis (CIFA). Two first-order models and two bifactor models were investigated. Results: The best fitted model was a bifactor model with a general factor underlying all items, and 10 items loading on 3 group factors. Cronbach’s alpha on the general factor (0.78) and on the group factor spinal-plus (0.74) were satisfying. Cronbach’s alpha on the group factors mental (0.56) and bulbar (0.48) were low. Reliability based on CIFA was 0.85. Conclusion: Results showed a clear factor structure of the GNDS. It justifies the use of the total score of the GNDS. In addition, three sub-scale scores could be used.

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