[SubiculumCode]

Without access to the residuals, I'd still venture to guess that the assumptions of the regression are not severely violated in this data set.

When this regression is conducted, the null hypothesis is not rejected (regression slope not significantly different than zero). If someone is somehow arguing this regression rejects the null hypothesis, then they would be incorrect. But there is nothing wrong with using regression here. Its kind of the whole point. This is basic regression statistics 101.

Error bands on the regression slope would help people understand the uncertainty of the apparent slope.