If I understand your question which is perhaps unlikely I would suggest the crosstabs procedure which will do the percentages for you as I recall. If this is unsatisfactory I would suggest seeing a local SPSS consultant. With best wishes, David Booth

Leonardo Cavaleiro if you share screenshot of you database (first 5 observations), I can help you. It will help me to understand data layout clearly.

Your question is to some extent inexpressive. If possible, explain more to get better answers.

Thank you very much for all your answers. I realize my question was anything but clear, and apologies for that, I will try and be more specific and precise.

A version of the instrument, the CTS-2 (Revised Conflict Tactics Scale), adapted to my country (Portugal), was used in the study I am working on, in order to find out the tactics people use to resolve conflict in an intimate relationship. It is comprised of 39 items, which are to be answered on a Likert scale, ranging from 1 (one time in the previous year) to 8 (it never happened). Every item is to be answered 2 times, one time to specify if the individual has done what says in the item (perpetration), and one time to specify if it was ever done to them (victimization), which represents a total a 78 items. It has five sub-scales (negotiation; physical abuse; psychological agression; sexual coercion; injury) and each sub-scale has three different levels (minor; severe; total), with the items being divided by these levels and sub-scales (e.g. items 11 and 71 belong to the Injury sub-scale, minor level).

As specified by both the original author and the authors which adapted the instrument, to obtain the global prevalence of either victimization or perpetration, being that perpetration is the focus of my study, one must transform every item into a dichotomous variable (1 through 7 is 1, indicating it has happened and 8 is 0, indicating it never happened). This is where my question comes in. I have transformed every item into a dichotomous variable, but I am completely lost at to what the SPSS processes are to obtain the percentages of perpetration for the levels and sub-scales from this dichotomous items.

Hope this is specific enough, and thank you very much for the attention and patience reading this.

If it is required I can also post a table to demonstrate the results I want to come to, and a screenshot of my database at the moment.

I have found a way to do it, through, as David Booth suggested, doing the crosstabs process. I have to, however, figure out the percentages of the sub-scales and levels myself because it only gives the output of each item. Thank you very much for the suggestion.

I will try and proceed with this method for now.