Notes
1. As an aside, the term ‘meta-regression’ is redundant and only serves to confuse. Meta-analysis is always a linear model. In its basic (random effects) form, this model is characterised as:
2. Lesser known cousin of Dr Spock.
3. There may also be a case for treating something other than the study as the unit of analysis (Cooper, Citation2010) – for example, the intervention techniques themselves.