Position and randomization
The methods did not appear equally often in each screen position, so this pilot cannot tell whether position changed the choices.
To test whether screen position changed a choice, every method must appear fairly across the positions. The build checks that requirement first and stops the position analysis when it fails.
Screen positions were not balanced. B appeared in position 3 twelve times but in position 4 only three times.
Stage 1 cannot tell whether screen position changed the choices.
Question content and screen position are mixed together. The position check was added after collection and failed.
The saved screen assignments fail the position-balance check for the full pilot and for the complete raters.
This check was added after collection and was not planned in advance. Failure blocks a corrected ranking but does not make the saved choices invalid.
The notebook shows one position-adjusted count as a “what if” check. It is not a corrected answer. Some method-and-position combinations were never seen for complete raters, so the data cannot separate screen position from differences between people.
A position-adjusted count is shown only as an exploratory check. It is not a corrected answer.
Some needed method-and-position comparisons were never observed, so the adjustment cannot separate position from rater differences.