Split-Half Reliability

Click the Split-half reliability button on the Reliability Results dialog box - Quick tab or Advanced tab to display the Split-Half Reliability dialog box, which contains two tabs: Quick and Advanced.

The Split-half reliability button is available only if two Variable lists were specified via the Reliability and Item Analysis Startup Panel - Advanced tab.

Summary Box. The Summary box at the top of the dialog box displays the summary statistics for each half of the split-half reliability including mean, sum, standard deviation, variance, and Cronbach's Alpha. It also reports the correlation between the two halves, the correlation corrected for attenuation, the split-half reliability score, and the Guttman split-half reliability score. See Split-half reliability for more details on these statistics.

Copy button. Click the Copy button to copy either the selected text (if text has been selected) in the Summary box or all of the text (if no text has been selected) to the Clipboard. Note that the copied text retains formatting information (such as font, color, etc.).

Contract/Expand button. Click the Contract/Expand button to contract or expand the Summary box. When contracted, you can see only one line of the Summary box text and can scroll through the text using a scroll bar. Note that when contracted the text is scrolled so that the first non-blank line is at the top. When expanded (the default setting), the entire Summary box is displayed in the Split-Half Reliability dialog box.

Summary. Click the Summary button to display a spreadsheet containing the summary statistics for the scale.

Cancel. Click the Cancel button to return to the Reliability Results dialog box.

Options. Click the Options button to display the Options menu.