Proper contrasts

Hello everyone.
In my experiment, i had people listen to a heart and at the end of the block, they reported whether the heart was beating synchronously to their own. Therefore, I have a 2x2 blocked design where every block is tagged as synchronous / asynchrnous and whether people responded as synchronous or not. I consider them to be Hit (synch present / sync response), Corr Reject (osynch present / osync response), False alarm(osynch present / sync response) , Miss (synch present / osync response).
My design matrix has 4 regressors (Hit,Miss,Corr Reject, False Alarm). What contrasts do I need to use to test for activity in mistakes vs correct responses?
Thank you!

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