I have recently begun analysing some data that had to be collected in a certain way, where participants had to give ratings for a set of images and then had to categorise the image.

I have collected and input data from a survey of two parts 1) a response scale (1-7) like a likert scale recording rating responses to an image, and 2) categorical data regarding the same images (whether the participants consider stimuli models in-group or out-group).

So far in SPSS i have the rating responses and each of the categorical questions that correspond to them, so for each image I have a variable showing the participant's ratings (1-7 ordinal scale data) and a variable for each image for participants answers to categorisation question (two categories, in or out-group, 1 or 2).

For the anaylsis I am trying to discern whether there is a significant difference between the way participants rated images of models that they considered in or out-group.

However, I am struggling to find an appropriate test for this style of data. I have looked into doing a Kruskal-Wallis test on my data, but SPSS will only allow one grouping variable, but the grouping of my participants is defined by their response to the categorical question for each stimulus, so I have a grouping variable for each image.

Does anyone know if any of the tests on SPSS are appropriate for this kind of data?

Many thanks!