Important for dissociating and prying away variables from each other
match > maintenance of a motor intention
nonmatch > memory-guided saccade 

Match / non-match tasks 

- Fixation>Unpredictable target>Memorize location>Delay>Saccade
- Used in previous investigations to separately analyze visual, mnemonic, and motor related activity  

New York University

- Oculomotor Delayed Response Task
- Controlling Response Selection 
- During a working memory delay one can either 1. look back at a past event, or 2. look forward to a future event
- Masking pattern to disrupt iconic visual memory

Coding Schemes for Working Memory Mechanisms 

Oculomotor Delayed Response Task

- More prominent in PPC
- More active in nonmatch delays

Retrospective Representation

More prominent in FEF
- More active in match delays (maintaining motor intention) 

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