Brain Science
Working memory is one of the strongest predictors of academic and professional performance. Here's exactly how MyRin engages and develops it
Working memory is the cognitive system that holds information in an active, accessible state while you're using it. It's not storage - it's the mental workbench where thinking happens.
When you're doing mental arithmetic, you're holding partial results in working memory. When you're following a complex argument, you're holding the earlier premises in working memory while processing the new ones. When you're playing chess and mentally tracing through a sequence of moves, working memory is what makes that possible.
Its capacity is limited - dramatically more limited than most people assume. The average person can hold roughly four "chunks" of information in working memory at once. The range between individuals is large, and it's one of the strongest predictors of academic and professional performance that psychologists have identified.
For a long time, working memory capacity was considered fixed - you had whatever you were born with, and training couldn't expand it. The research since the early 2000s has substantially revised that view.
What can be trained, the research now suggests, is not raw capacity (the number of items you can hold) but efficiency - how well you use the capacity you have. Specifically, three aspects are trainable:
All three of these respond to deliberate practice. All three are directly exercised by MyRin's puzzle design.
Chunking efficiency is built by the pattern-based puzzle structure. When you encounter a rule you've seen in an earlier level, you don't need to process its individual elements again - you recognize the pattern as a single chunk. Players who advance through MyRin efficiently are players who are chunking effectively.
Updating speed is required by multi-step deduction puzzles. Each step in a logic chain requires you to update your mental model - replacing "X could be in position A or B" with "X must be in position A, because B is eliminated by this constraint." The faster and more accurately you update, the faster you solve.
Interference resistance is exercised by puzzles that present irrelevant or misleading information alongside the relevant constraints. A puzzle with five rules where only three of them apply to the current configuration requires you to suppress the interference of the inapplicable rules while working with the relevant ones.
The same principle that governs physical training - progressive overload, gradually increasing demand to drive adaptation - governs effective cognitive training. MyRin's level progression is specifically designed to stay slightly ahead of the player's working memory capacity, not to overwhelm it.
This is the zone where working memory actually develops: tasks that require the full deployment of current capacity, pushing slightly beyond the comfortable. Too easy and no adaptation occurs; too hard and performance collapses rather than improving. The narrow productive zone is what the level design is targeting.
The external sign of working memory improvement is that complex multi-step tasks feel less cognitively demanding. Following a long verbal argument becomes easier. Mental arithmetic gets faster. Keeping track of multiple considerations in a decision becomes less exhausting.
Players who have progressed through MyRin's level set consistently report this: that problem-solving tasks in daily life feel more manageable than they did before, not because they're easier, but because the cognitive overhead of tracking intermediate steps has decreased.