工作记忆

训练保持和操作信息的心理工作空间。

每个练习针对一个狭窄的构念：工作记忆、选择性注意、速度。

训练模式提供即时反馈。测试模式有计时和评分。

Each exercise here is scored so you see your real progress, not vague points. Train mode gives immediate feedback. Test mode is timed and comparable to your past sessions.

Each test is constructed using Item Response Theory (IRT) and Classical Test Theory (CTT) to ensure reliable measurement of knowledge and ability across different difficulty levels.

Questions undergo rigorous review including difficulty calibration, discrimination analysis, and distractor effectiveness evaluation to maintain high assessment quality.

Imaging work (Olesen et al., 2004; Takeuchi et al., 2010) shows practice rewires the dorsolateral prefrontal cortex and parietal circuits — the hardware layer of the working-memory network actually changes.

1. Start with a clean baseline: Run a Test-mode session at your current level to establish where you actually are.
2. Use Train mode aggressively: Feedback helps you learn patterns. Stay in Train until accuracy is above 80% consistently.
3. Push one level only when stable: Moving up too early introduces noise. Keep n-back difficulty where you're confident.
4. 10 minutes daily beats 1 hour weekly: Spaced practice consolidates gains. Skip a day and you regress fast.