Behaviour change · The control · Element
The selection problem
What the naive comparison would have shown.
The part
What it is
Worth calculating and presenting alongside the controlled figure, since the naive comparison is what everyone expects and what the programme has probably been reported on.
The gap between the two is the size of the selection effect and is usually most of the apparent benefit.
The smallest level
The attributes it carries
Each attribute is one of the framework’s shared types. What a date is, and how it is written, is defined once for the whole model — the note here says what it means in this particular place.