p-delta ` secondary
 

p-delta ~ secondary
what are other secondary analysis besides p-delta
that is the definition of a secondary analysis.
there are two types of second order effects:
p-smalldelta - which is from the deflection of the
i'm nit-picking, but you both probably mean second-order.
csd72 is absolutely right.
yes, thanks, i realised that after i posted.

thanks csd72 and frv