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Memory Reaction asks you to hold something in memory and react quickly at the same time. Both tasks are easy alone. Together they interfere, because the rehearsal that protects your memory is exactly what a fast reaction interrupts.
Memorise the item or sequence shown.
While holding it, respond to reaction prompts as they appear.
React fast without dropping what you are holding.
Recall the memorised item at the end of the round.
Both the reaction times and the recall are scored.
The interference between maintenance and response. This is the mechanism behind complex span tasks, and it is why remembering a phone number while someone talks to you is so hard.
Rehearse in a rhythm that can survive an interruption — short bursts rather than a continuous loop.
Refresh the memory immediately after each reaction, before the next prompt.
Prioritise the memory. Reactions are recoverable; a dropped item is not.
Chunk before the reactions start. Four items held as two chunks survive interruption far better.
Rehearsal and response compete for the same limited control. Every reaction is a gap in rehearsal, and memory decays in gaps.
Recall. The scoring weights it higher, and it is the harder half.
No. Dual Tracker splits attention across two visual streams; this splits it between holding and responding.
Practice on the specific combination helps. The underlying competition does not go away.