Does someone know a good conceptual explanation of the differences between «normal», WL- and BL-cors? Two #correlation matrices descr. same dataset: All meaningful covariation is (I think) at same level, between persons. However, they are nested in groups, potentially influencing scores. Hence, I made #multilevel cor. matrix where «group» is cluster variable, and w/b-group cors are shown below/above diagonal. Coefs in the «normal» matrix are diff. from both. What to report? #statistics #rstats

Our research group is doing a seminar the coming week, and I've been asked to hold a one-hour intro to quantitative diary studies and #multilevel analyses for new #phd students unfamiliar with this way of collecting data. I'd like to highlight benefits, when it's appropriate, show an example using #rstats and #lme4, and start a discussion around how they can do this themselves in their projects.

Does anyone have suggestions for stuff to include, or clever ways to convey it? Resources?