something like this untested syntax should do it (it will return a
nonmissing score when there are at least 37 items.

compute ok = nvalid(item01 to item40).
compute meanscore = mean.37(item01 to item40).
compute fullscore = rnd((40/ok) * meanscore).

Art
Art@DrKendall.org
Social Research Consultants
University Park, MD  USA
(301) 864-5570


Doc. Dr. Mustafa BALOGLU wrote:

>Hi everyone,
>I have a simple question. I need to sum up 40 items to get a total score;
>however, SPSS does not compute even if a single value is missing. There is a
>formula to override this but I cannot remember.Could anyone write it?
>Thanks in advance,
>
>mustafa