Statistics notes: Cronbach's alpha

Bland, J M; Altman, D G

doi:10.1136/bmj.314.7080.572

Cited by 4,012 publications

(2,187 citation statements)

References 4 publications

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“…The Cronbach's alpha of the Tswana version of the WDI was 0.75, which is similar to the coefficient previously reported by Davidson & Keating (2002). Bland &Altman (1997 andNunnally (1978) agree that for comparing groups, alpha values of 0.7 to 0.8 are considered satisfactory but that for clinical application much higher values of alpha are needed and a minimum of 0.9 is desirable. Thus in this sense the Tswana versions of the RMDQ, QDS and WDI should all be suitable for group analysis.…”

Section: Validitysupporting

confidence: 72%

Validation of the Tswana Versions of the Roland-Morris Disability Questionnaire, Quebec Disability Scale and Waddell Disability Index

Beer

2008

South African Journal of Physiotherapy

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Section: Validitysupporting

confidence: 72%

Validation of the Tswana Versions of the Roland-Morris Disability Questionnaire, Quebec Disability Scale and Waddell Disability Index

Beer

2008

South African Journal of Physiotherapy

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“…In addition, the test-retest reliability was high (r = .92). The internal consistency of the total scale was also high (Cronbach's alpha = 0.90), whereas the Cronbach's alphas of the subscales ranged from 0.64 to 0.66 which is just below the range that is regarded as satisfactory for comparing groups (0.7-0.8; Bland & Altman, 1997). In the present study, Cronbach's alphas for the subscales were 0.62 (self), 0.65 (unknown), and 0.50 (partner).…”

Section: Contamination Potency Of Sexual Productsmentioning

confidence: 81%

Disgust and Contamination Sensitivity in Vaginismus and Dyspareunia

et al. 2007

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This study examined the potential role of disgust propensity and contamination sensitivity in vaginismus. Women suffering from vaginismus (n = 20) or dyspareunia (n = 22), and a group of women without sexual complaints (n = 30) completed self report measures indexing their (1) general dispositional disgust propensity, and (2) sensitivity for (ideational) contamination by sexual stimuli as a function of its source (self, partner, unknown). In support of the idea that disgust may be involved in vaginismus, women with vaginistic complaints displayed a generally enhanced dispositional disgust propensity. The sensitivity for contamination by sexual stimuli did not vary across groups. However, especially when the source was the participant's partner, the willingness ratings might have been influenced by demand and may, therefore, not accurately reflect participant's actual sensitivity for contamination by sexual stimuli. Future studies using more implicit or behavioral measures are necessary to more definitely test the role of disgust in vaginismus.

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“…By removing two questions with low individual inter-item correlation, the overall value could be increased to 0.78 with a range of 0.74 0.81 for the remaining questions, imply ing good validity. 22 Having assessed the survey instru ment, copies were sent to the Vocational Training Advisers in England, Wales, Scotland and Northern Ireland with a covering letter informing them about the purpose of the study, and asking for their assistance in distributing and naire included a covering letter to the VDP outlining the importance of the project, requesting that they complete the questionnaire and ensuring them that their replies would be non-attribut able. These were distributed to the VDPs at one of their regular training days by the VT adviser and, to ensure anonym ity, it was recommended that they were collected by one of the group who sealed them in a stamped addressed envelope for return to the investigators.…”

Section: Methodsmentioning

confidence: 99%