# Can you run a multiple regression where variables use different Likert scales?

I have 8 predictor variables and 1 criterion variable, all variables are measured by 9 different constructs, some are 0-4 Likert scales, some are 1-5 Likert scales, can I use their mean scores and run a multiple regression?

• Can you say more about your situation, @Shirley? Do you mean that you have 9 different Likert items, where some are numbered 0-4 & others 0-5? Or do you have multiple items (forming a scale) per construct, and you want to average over all the the items w/i a construct to get a single mean for each variable? Or something else? In formulating your question, it might help to read this blog post: how to ask a statistics question. Also, if your criterion is ordinal, you might consider ordinal logistic regression. Apr 26 '13 at 16:51
• Thanks for prompt response and advice. Here is the situation: Apr 26 '13 at 17:12
• I have 8 predictor variables using 8 different questionnaires. These 8 variables are stress level, self esteem, peer relationship, family relationship, neuroticism, boredom proneness, depression, social anxiety (So there are 8 different questionnaires). However, this 8 questionnaires have its each form of scales. Apr 26 '13 at 17:19
• For example, Stress questionnaire is using 0-4 scale (0 = strongly disagree, 4 = strong agree); Self esteem is using 0-3 scale (0 = strongly disagree, 3 = strong agree); Peer relationship is using 1-4 scale (1 = strongly disagree, 4 = strong agree) and etc. My criterion variable is Online gaming addiction using 1-4 scale (1 = strongly disagree, 4 = strong agree) Apr 26 '13 at 17:19
• So what I'm doing now is that I calculate mean score for these 8 predictor and 1 criterion variable (in other word, I have one single mean for each variable, so in total I have 8 predictor mean scores and 1 criterion mean score now). Apr 26 '13 at 17:21