Thinking critically about social science method

This is an interesting blog post by Christian Sandvig (Illinois iSchool) (via Marianne Ryan) about social science research methods. The title is hooey, but two deeper points are good ones I think — not new, but often overlooked, and he provides some references to more complete discussions (suitable for, perhaps, use in 840, ahem).
His two main points as I see them: methods courses often focus too much on procedure, when they should focus first and foremost on research design and the nature of evidence. And, statistical significance is not substantive significance.