Alpha, Omega, and H Internal Consistency Reliability Estimates: Reviewing These Options and When to Use Them

2021 ◽  
pp. 1-12
Author(s):  
Michael T. Kalkbrenner
Keyword(s):  
Internal Consistency ◽  
Internal Consistency Reliability ◽  
Reliability Estimates ◽  
Alpha Omega

scholarly journals An Application of Reliability Estimation in Longitudinal Designs Through Modeling Item-Specific Error Variance

2019 ◽  
Vol 79 (6) ◽  
pp. 1038-1063
Author(s):  
Georgios D. Sideridis ◽  
Ioannis Tsaousis ◽  
Abdullah Al-Sadaawi
Keyword(s):  
Internal Consistency ◽  
Population Distribution ◽  
Composite Index ◽  
Error Variance ◽  
Internal Consistency Reliability ◽  
Reliability Estimation ◽  
Reliability Estimates ◽  
Percentage Improvement ◽  
Confirmatory Factor ◽  
The Difference

The purpose of the present study was to apply the methodology developed by Raykov on modeling item-specific variance for the measurement of internal consistency reliability with longitudinal data. Participants were a randomly selected sample of 500 individuals who took on a professional qualifications test in Saudi Arabia over four different occasions. Data were analyzed by use of confirmatory factor analysis, and item error variance was corrected for item specificity. The estimation of reliability involved composite index omega. Results indicated that the initially low and unacceptable levels of internal consistency reliability approached acceptable levels after accounting for item-specific variance. Findings were verified by testing whether the difference estimates of internal consistency reliability deviated from a zero-mean distribution using 10,000 replicated samples assuming a known (symmetric) or unknown (asymmetric) population distribution of the difference reliability coefficients. Percentage improvement reliability estimates indices were also estimated along with their 95% confidence intervals. Two appendices provide annotated Mplus syntax files for future use.

Reliability of the Jackson Personality Inventory

1977 ◽  
Vol 40 (2) ◽  
pp. 613-614 ◽  
Author(s):  
Douglas N. Jackson
Keyword(s):  
College Students ◽  
Internal Consistency ◽  
Internal Consistency Reliability ◽  
Personality Inventory ◽  
Reliability Estimates ◽  
Two Samples

Internal consistency reliability estimates were obtained for two samples of college students for the Jackson Personality Inventory using Bender's coefficient theta. In the California sample ( n = 82), values ranged from .84 to .95, with a median of .93. The Pennsylvania sample ( n = 307) yielded a range of .75 to .93, with a median of .90.

Reliability Estimates for the Arabic Versions of the Cancer Behavior Inventory-Brief and the Functional Assessment of Cancer Therapy-Breast

2016 ◽  
Vol 24 (3) ◽  
pp. 388-398 ◽  
Author(s):  
Maaidah M. Algamdi ◽  
Sandra K. Hanneman
Keyword(s):  
Cancer Therapy ◽  
Internal Consistency ◽  
Functional Assessment ◽  
Cognitive Interview ◽  
Internal Consistency Reliability ◽  
Preliminary Evidence ◽  
Community Dwelling ◽  
Test Reliability ◽  
Cross Sectional ◽  
Reliability Estimates

Purpose: The study aims were to (a) test reliability of the Arabic versions of the Cancer Behavior Inventory-Brief Arabic (CBI-BA) among patients diagnosed with any type of cancer and the Functional Assessment of Cancer Therapy-Breast (FACT-BA) in women with breast cancer and (b) assess participant understanding of CBI-BA items. Methods: A cross-sectional design was used to assess preliminary evidence for internal consistency reliability of the CBI-BA and the FACT-BA in a community-dwelling sample of Arabic-speaking persons diagnosed with cancer. Participants were randomly selected for cognitive interview. Results: Cronbach’s alphas were ≥.76 for the CBI-BA, .91 for the FACT-BA, and .43–.89 for the FACT-BA subscales. Cognitive interviews revealed several CBI-BA items required revision. Conclusion: The total CBI-BA and the FACT-BA scales have adequate internal consistency reliability estimates.

scholarly journals Reliability and Validity of the Chinese General Social Capital Scale and Its Effect on Physical Disease and Psychological Distress among Chinese Medical Professionals

2021 ◽  
Vol 18 (12) ◽  
pp. 6635
Author(s):  
Sibo Zhao ◽  
Yanwen Li ◽  
Yonggang Su ◽  
Long Sun
Keyword(s):  
Social Capital ◽  
Psychological Distress ◽  
Psychometric Properties ◽  
Factor Structure ◽  
Internal Consistency ◽  
Internal Consistency Reliability ◽  
Chinese Version ◽  
Medical Professionals ◽  
Reliability Estimates ◽  
Physical Diseases

The study was designed with two objectives. The first was to assess the factor structure, internal consistency reliability, and preliminary psychometric properties of the Chinese version of the Chinese-translated General Social Capital Scale (GSCS) in a sample of Chinese medical professionals. The second was to investigate the association between general social capital, physical disease, and psychological distress using the same Chinese sample. The English version of the GSCS was translated into Chinese, and its factor structure, estimates of internal consistency reliability, and psychometric properties were examined in a representative sample of medical professionals. In particular, a total of 3367 participants in Shandong Province, China were identified using the multi-stage stratified sampling method. In addition to the GSCS, preliminary data were collected using self-report instruments that included questionnaires on physical diseases, psychological distress, and general sociodemographic information. Results include internal consistency reliability estimates at 0.933 and acceptable values of the Guttman split-half coefficients for the GSCS and its subscales. The Kaiser–Meyer–Olkin value for the Chinese GSCS was 0.933, and the p-value of Bartlett’s test was less than 0.001. Exploratory factor analysis supported nine components of the scale with an acceptable cumulative rate (66.63%). The study further found a negative relationship between physical diseases, psychological distress, and social capital. The Chinese version of the GSCS has a satisfactory factor structure, reliability estimates, and satisfactory evidence of concurrent validity estimates for medical professionals from various demographic backgrounds. The current scale holds promise for wide use in future investigations on Chinese populations.

The Structure of Thalbourne's Brief Manic-Depressive Scale

2010 ◽  
Vol 106 (3) ◽  
pp. 901-904 ◽  
Author(s):  
James R. Rogers ◽  
David Lester
Keyword(s):  
Factor Analysis ◽  
Confirmatory Factor Analysis ◽  
Internal Consistency ◽  
Internal Consistency Reliability ◽  
Clinical Use ◽  
Manic Depressive ◽  
Reliability Estimates ◽  
Confirmatory Factor ◽  
Psychometric Analyses ◽  
Cast Doubt

Data from 1,376 respondents on a 1994 scale to measure depressive and manic experiences devised by Thalbourne, Delin, and Basset (1994) were analyzed. Internal consistency reliability estimates for the Total scale (.66), the Depressive subscale (.63), and the Manic subscale (.45) were poor to marginal, and a confirmatory factor analysis did not support the two-subscale structure of the scale. These results, considered in conjunction with those of previous psychometric analyses of the Manic-Depressive Scale, cast doubt on its usefulness for research and clinical use.

On the Inappropriateness of Using Items to Calculate Total Scale Score Reliability via Coefficient Alpha for Multidimensional Scales

2014 ◽  
Vol 30 (2) ◽  
pp. 130-139 ◽  
Author(s):  
Gilles E. Gignac
Keyword(s):  
Scale Score ◽  
Internal Consistency ◽  
Correlation Matrix ◽  
Internal Consistency Reliability ◽  
Reliability Estimation ◽  
Unit Level ◽  
Reliability Estimates ◽  
Score Reliability ◽  
Scale Scores ◽  
Total Scale Score

Researchers have the implicit option of calculating internal consistency reliability (coefficient α) for total scale scores derived from multidimensional inventories based on either the inter-item correlation matrix (item unit-level) or the inter-subscale correlation matrix (subscale unit-level). It is demonstrated that item unit-level and subscale unit-level reliability estimates often diverge substantially in practice. Specifically, the item unit-level reliability estimation is often larger than the corresponding subscale unit-level estimate. It is recommended that if researchers calculate total scale score reliability at the item unit-level, then a model-based approach to the estimation of internal consistency reliability (i.e., omega hierarchical) should be applied, when the underlying model is multidimensional. If omega hierarchical cannot be applied for any particular reason, it is recommended that total scale score reliabilities be calculated at the subscale unit-level of analysis, not the item unit-level.

scholarly journals How do we assess resilience and grit among internal medicine residents at the Mayo Clinic? A longitudinal validity study including correlations with medical knowledge, professionalism and clinical performance

BMJ Open ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. e040699
Author(s):  
Fares Alahdab ◽  
Andrew J Halvorsen ◽  
Jayawant N Mandrekar ◽  
Brianna E Vaa ◽  
Victor M Montori ◽  
...  
Keyword(s):  
Internal Medicine ◽  
Internal Consistency ◽  
Test Performance ◽  
Mayo Clinic ◽  
Clinical Performance ◽  
Medical Knowledge ◽  
Internal Consistency Reliability ◽  
Validity Study ◽  
Training Environment ◽  
Conference Attendance

BackgroundThere has been limited research on the positive aspects of physician wellness and to our knowledge there have been no validity studies on measures of resilience and grit among internal medicine (IM) residents.ObjectivesTo investigate the validity of resilience (10 items Connor-Davidson Resilience Scale (CD-RISC 10)) and grit (Short Grit Scale (GRIT-S)) scores among IM residents at a large academic centre, and assess potential associations with previously validated measures of medical knowledge, clinical performance and professionalism.MethodsWe evaluated CD-RISC 10 and GRIT-S instrument scores among IM residents at the Mayo Clinic Rochester, Minnesota between July 2017 and June 2019. We analysed dimensionality, internal consistency reliability and criterion validity in terms of relationships between resilience and grit, with standardised measures of residents’ medical knowledge (in-training examination (ITE)), clinical performance (faculty and peer evaluations and Mini-Clinical Evaluation Examination (mini-CEX)) and professionalism/dutifulness (conference attendance and evaluation completion).ResultsA total of 213 out of 253 (84.2%) survey-eligible IM residents provided both CD-RISC 10 and GRIT-S survey responses. Internal consistency reliability (Cronbach alpha) was excellent for CD-RISC 10 (0.93) and GRIT-S (0.82) overall, and for the GRIT subscales of consistency of interest (0.84) and perseverance of effort (0.71). CD-RISC 10 scores were negatively associated with ITE percentile (β=−3.4, 95% CI −6.2 to −0.5, p=0.02) and mini-CEX (β=−0.2, 95% CI −0.5 to −0.02, p=0.03). GRIT-S scores were positively associated with evaluation completion percentage (β=2.51, 95% CI 0.35 to 4.67, p=0.02) and conference attendance (β=2.70, 95% CI 0.11 to 5.29, p=0.04).ConclusionsThis study revealed favourable validity evidence for CD-RISC 10 and GRIT-S among IM residents. Residents demonstrated resilience within a competitive training environment despite less favourable test performance and grittiness that was manifested by completing tasks. This initial validity study provides a foundation for further research on resilience and grit among physicians in training.

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