SMHS Cronbachs

Scientific Methods for Health Sciences - Instrument Performance Evaluation: Cronbach's α

Under development

Include the following table in the Methods section!!!

Subjects	Items/Questions Part of the Assessment Instrument				Total Score per Subject
	$Q_1$	$Q_2$	...	$Q_k$
$S_1$	$Y_{1,1}$	$Y_{1,2}$	…	$Y_{1,k}$	$X_1=\sum_{j=1}^k{Y_{1,j}}$
$S_2$	$Y_{2,1}$	$Y_{2,2}$	…	$Y_{2,k}$	$X_2=\sum_{j=1}^k{Y_{2,j}}$
...	...	...	...	...	...
$S_n$	$Y_{n,1}$	$Y_{n,2}$	…	$Y_{n,k}$	$X_n=\sum_{j=1}^k{Y_{n,j}}$
Variance per Item	$\sigma_{Y_{.,1}}^2=\frac{1}{n-1}\sum_{i=1}^n{(Y_{i,1}-\bar{Y}_{.,1})^2}$	$$\sigma_{Y_{.,2}}^2=\frac{1}{n-1}\sum_{i=1}^n{(Y_{i,2}-\bar{Y}_{.,2})^2}$$	…	$$\sigma_{Y_{.,k}}^2=\frac{1}{n-1}\sum_{i=1}^n{(Y_{i,k}-\bar{Y}_{.,k})^2}$$	$$\sigma_X^2=\frac{1}{n-1}\sum_{i=1}^n{(X_i-\bar{X})^2}$$

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• SOCR Home page: http://www.socr.umich.edu

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