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| Work in progress! The program in this [attachment:tera.xls spreadsheet] will handle upto 15 dichotomous variables with missing responses assumed to be coded as blanks and the lowest valued response assumed to be coded as a '1'. The data is entered in sheet 1 and the output is a tetrachoric correlation matrix in sheet 2. |
The program in this [attachment:tetra.xls spreadsheet] will handle upto 15 dichotomous variables on upto 800 cases with missing responses assumed to be coded as blanks and the lowest valued response assumed to be coded as a '1'. The data is entered in sheet 1 and the output is a tetrachoric correlation matrix in sheet 2. Ths matrix may be copied over and entered into a SPSS spreadsheet as input to a factor analysis as described [:FAQ/polychoric: here.] |
Tetrachoric computation using EXCEL spreadsheet
The program in this [attachment:tetra.xls spreadsheet] will handle upto 15 dichotomous variables on upto 800 cases with missing responses assumed to be coded as blanks and the lowest valued response assumed to be coded as a '1'. The data is entered in sheet 1 and the output is a tetrachoric correlation matrix in sheet 2. Ths matrix may be copied over and entered into a SPSS spreadsheet as input to a factor analysis as described [:FAQ/polychoric: here.]