Individual Similarity v Individual Differences

Yea, looks like the approach of my study is really an individual differences approach. That's the slant to my story? Universal theories of reasoning aspire to explain how we humans as a whole reason. This is an individual similarities approach, intending to collapse differences and focus on understanding our shared mental architectures.

In contrast, by throwing in WM capacity, we are interested in how a proposed general rule might vary across individuals.

Perhaps this might help in my writing of the introduction. Or perhaps not. :p