How to Scale Respondents to have a Mean of 0 and a Standard Deviation of 1

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  1. In the Variables and Questions tab select the variables that you wish to use and select Insert Ready-Made Formula(s) > Mathematical Functions (by Case) > Standard Deviation.
  2. Change the name of the newly constructed variable to stDev.
  3. Selecting the variables that you wish to use and select Insert Ready-Made Formula(s) > Mathematical Functions (by Case) > Average.
  4. Change the name of the newly constructed variable to ave.
  5. Create a new Numeric JavaScript Variable, filling it out as follows:
    1. Label The unique aspect of the Label of the first of the clustering variables. For example, if the first of the clustering variables is Attitude Coke, the new variable should have a label like Scaled Coke.
    2. Expression: if(stDev == 0) NaN; else (var1 – ave)/stDev;, where var1 is the Name of the first clustering variable.
    3. Then press OK.
  6. Select the newly constructed variable and select Insert Ready-Made Formula(s) > Use as Template for Replication' and OK.
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