Millisecond Forums

Hi,
I am currently conducting a test (GO/No-GO Association Task) to examine the implicit attitude towards individuals with disabilities. I understand that typical GNAT requires the derivation of d'prime indices for each critical block in order to compare the association strengths between targets and attributes.

However, I would also like to quantify a single index for implicit attitude in order to run subsequent analyses looking at its relationship with explicit measure of attitude. I am uncertain of the best way to do so though. Should I run the analyses based on the difference score by subtracting d'prime(disabilties+plesant) from d'rime(disabilities+unpleasant)? Or would it be more desirable to conduct the analyses with either the d'prime of (disabilities+pleasant) or (disabilities+unpleasant) alone?

I am more inclined towards the latter idea because I feel that the d'prime for each block is distinct on its own as weaker association between disabilities+pleasant may not necessary translate to a stronger association between disabilities+unpleasant. I feel that both are on relatively different scale. However, I have seen literature which have collapse both d'primes by deriving a difference score to quantify an implicit attitude index. 

Anyone can advice? Thank you in advance!