CRONBACH'S ALPHA TEST... CRONBACH'S ALPHA TEST • Cronbach's alpha coefficient is a statistical test method used to closely test and test the correlation between the observed variables.
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• Cronbach's alpha coefficient is a statistical test method used to closely test and test the
correlation between the observed variables
• Two aspects related to the correlation between the variables themselves and the correlation of the scores of each variable with all the variables scores of each respondent
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• This method allows eliminating the mismatch
observed variables and constraints of garbage, error variables in the study model because
otherwise we can not know exactly variability as well as the errors of the variables
Trang 4• Free from random error
• Degree to which a measure is consistent or
dependable
• Degree to which it would give you the same result over and over again
CRONBACH'S ALPHA TEST
Trang 5• Inter-rater or inter-observer/-coder reliability
– Degree to which different raters/observers give
consistent estimates of the same phenomenon
• Test-retest reliability
– Consistency of a measure from one time to another
• Alternative-forms reliability
– Consistency of the results of two tests constructed
in the same way from the same content domain
• Internal consistency reliability
– Consistency of results across items within a test
CRONBACH'S ALPHA TEST
Trang 6An Analogy to Validity and Reliability
• A good measurement technique should be both valid (measuring what it is intended to measure) and reliable (yielding a given measurement
dependably)
CRONBACH'S ALPHA TEST
Trang 7• Coefficient alpha (Cronbach's alpha)
– Average of all possible split-half coefficients
resulting from different ways of splitting the scale items
Coefficient varies from 0 to 1 (α 0.7)
Corrected Item – Total Correlation 0.3
Alpha if Item Deleted
Chu Nguyễn Mộng Ngọc, 2007, phân tích dữ liệu nghiên cứu với SPSS, nhà xuất bản Hồng Đức, TP,HCM)
CRONBACH'S ALPHA TEST
Trang 8• Performed with SPSS
Analyze\ Scale \ Reliability Analysis…
CRONBACH'S ALPHA TEST
Trang 9• Performed with SPSS
Analyze\ Scale \ Reliability Analysis…
CRONBACH'S ALPHA TEST
Trang 10• Performed with SPSS
Analyze\ Scale \ Reliability Analysis…
CRONBACH'S ALPHA TEST
Trang 11• Reading and interpreting the results
CRONBACH'S ALPHA TEST