[R] Normalising proportional binomial data that has a set top value

From: sboardman <simon.boardman_at_gmail.com>
Date: Thu, 03 Mar 2011 09:11:22 -0800 (PST)

I've got some data in proportional format which has a set maximum value of 0.5 and I want to know how to normalise it.

I've calculated a lateralisation index to determine whether an organism deviates from an equal number of left and right turns within a trial (as opposed to measuring the proportion of left and right turns in total). My proportions are therefore between 0 (equal number of left and right turns) and 0.5 (all turns in the same direction, either left or right).

I want to analyse the data using an ANOVA to test repeated measures for the repeatability coefficient but recognise I will have to normalise the data for it to work properly.

Any help is much appreciated.


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