Robust estimation of Cronbach's alpha

Christmann, Andreas; Aelst, Stefan Van

doi:10.1016/j.jmva.2005.05.012

Cited by 266 publications

(160 citation statements)

References 32 publications

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“…Since the sample was small, more robust measures were taken into account as suggested by Christmann and Van Aelst (2006). Thus the Cronbach's α based on Tukey's S-estimator (S bw ) was 0.63.…”

Section: Measures Of Perceived Negative Stressful Situationsmentioning

confidence: 99%

“…Without the time consuming The mean value with the sample on this part in Study 1 was 1.24 (SD = 0.43), and the Cronbach's α based on the classical approach was 0.57. Since the sample was small, more robust measures were taken into account as suggested by Christmann and Van Aelst (2006). Thus, the Cronbach's α based on Tukey's S-estimator (S bw ) was 0.60.…”

Section: Measures Of Ethical Actingmentioning

confidence: 99%

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Ethical Decision Making in Organizations: The Role of Leadership Stress

Selart

Johansen²

2010

J Bus Ethics

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ABSTRACT. Across two studies the hypotheses were tested that stressful situations affect both leadership ethical acting and leaders' recognition of ethical dilemmas. In the studies, decision makers recruited from 3 sites of a Swedish multinational civil engineering company provided personal data on stressful situations, made ethical decisions, and answered to stress-outcome questions. Stressful situations were observed to have a greater impact on ethical acting than on the recognition of ethical dilemmas. This was particularly true for situations involving punishment and lack of rewards. The results are important for the Corporate Social Responsibility (CSR) of an organization, especially with regard to the analysis of the stressors influencing managerial work and its implications for ethical behavior.

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Section: Measures Of Perceived Negative Stressful Situationsmentioning

confidence: 99%

Section: Measures Of Ethical Actingmentioning

confidence: 99%

Ethical Decision Making in Organizations: The Role of Leadership Stress

Selart

Johansen²

2010

J Bus Ethics

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“…Cronbach's alpha is one of the statistical techniques (Christmann & Aelst, 2006), that was used to determine the reliability in this study.…”

Section: Introductionmentioning

confidence: 99%

Pharmacoethics: Development and Validation of Instrument to Measure Knowledge, Perception and Awareness of Graduating Pharmacy Students on Pharmacy Code of Conduct in Malaysia

Zaid

Sulaiman

Rashid

2017

pijss

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“…Veri setinde aykırı değer olması durumunda bu iki kestirici etkileneceğinden klasik faktör analizinin performansı da buna bağlı olarak kötüleşecektir [4]. Tek bir aykırı değer varlığı korelasyon kestirimlerinin yanı sıra Cronbach alfa ölçüsünü, kestirimi yapılan faktör analizi model parametrelerini ve modelin uyum iyiliği ölçülerini bile bozabilir [5][6][7]. Sonuç olarak aykırı değerlerin yanlış model belirlenmesine yol açabildiği ve modele ekstra bir faktörün eklenmesine bile sebep olabileceği ileri sürülmüştür [8].…”

Section: Gi̇ri̇ş (Introduction)unclassified

Aykırı değer varlığında sağlam konum ve ölçek kestiricilerinin faktör analizinde kullanımı

Alpu¹

2016

SAUFenBilDer

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ÖZÇok değişkenli analizlerden biri olan faktör analizi veri indirgeme, değişkenler arasındaki ilişkileri belirleme ve aynı zamanda sınıflandırma yöntemi olarak karşımıza çıkmaktadır. Çok sayıda değişken içeren veri setlerini analiz ederken araştırmacılar problemin sonuçları üzerinde olası zararlı etkileri olabilen ve aykırı değer olarak isimlendirilen olağandışı gözlemlerle karşılaşabilmektedir. Sıklıkla hatalı gözlemler olarak değerlendirilen aykırı değerler, veri seti hakkında önemli bilgileri içinde barındırabileceği gibi kurulan modelin yanlış belirlenmesi, yanlı parametre kestirimi ve yanlış analiz sonuçlarına da neden olabilmektedir. Bu çalışmanın amacı aykırı değerlerin parametre kestirimlerini yanlı yapmayacak özellikte faktör analizi metodunu kullanmaktır. Bu amaçla aykırı değerlerin etkisini azaltan sağlam konum ve ölçek kestiricileri içinden hızlı minimum kovaryans determinantı kestiricileri tercih edilip, bir faktör analizi uygulaması gerçekleştirilmiştir. Sonuç olarak aykırı değerlerin etkisini azaltarak verilerin çoğunluğuna uyan, açıklanan varyansı daha yüksek ve değişkenlerin daha anlamlı olarak faktörlerde toplandığı sağlam faktör analizi kestirim sonuçları elde edilmiştir.Anahtar Kelimeler: aykırı değer, faktör analizi, hızlı minimum kovaryans determinantı Using fast minimum covariance determinant estimators for factor analysis in the presence of outliers ABSTRACT Factor analysis, one of those multivariate methods, is used for data reduction, determining the relationships between variables, and also as a classification method. The researchers frequently face with the observations that might have bad affects on the results while analysing data sets with many variables. Those kind of observations are called outliers. Outliers, usually evaluated as erroneous observations, may reflect important information about the data set, but on the other hand may cause misspecification of the model, biased parameter estimates, and may lead incorrect analysis results. The aim of this study is to use factor analysis method which will not make biased parameter estimations of the outliers. For this aim, among the robust local and scale parameter estimators which reduce the affects of outliers, fast minimum covariance determinant estimators are choosen and an application is performed. As a result, robust factor analysis estimation results are obtained which are mostly fitted to the data by reducing the affect of the outliers, with higher explained variability and with explained variables which are gathered on more significant factors.

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Robust estimation of Cronbach's alpha

Cited by 266 publications

References 32 publications

Ethical Decision Making in Organizations: The Role of Leadership Stress

Ethical Decision Making in Organizations: The Role of Leadership Stress

Pharmacoethics: Development and Validation of Instrument to Measure Knowledge, Perception and Awareness of Graduating Pharmacy Students on Pharmacy Code of Conduct in Malaysia

Aykırı değer varlığında sağlam konum ve ölçek kestiricilerinin faktör analizinde kullanımı

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