Every cartridge names the skill, the round length, and the limit of the claim before play starts.
THE STACK
Not a game system. A brain expansion system.
Near transfer is real. Far transfer is contested. Simons 2016 stays on the shelf on purpose.
Five frameworks, one loop. Kahneman, Werbach, Thaler, neuroplasticity, Atomic Habits. Every round short enough to fit between meetings.
Non-Trivial and Blow Into The Cartridge exist only here — personal packs, not another generic feed.
CARTRIDGE DIRECTORY
Choose your room
Four rooms. Every drill opens with a plain-language Brain Briefing. Free to play, no account, no ads.
THE HONEST VERSION
Practice is specific.
These games exercise the skill named on the cartridge. Near transfer can happen. Broad claims about becoming smarter at unrelated tasks remain contested.
READ THE PAPERS
- Jaeggi 2008 · N-back
- Miller 1956 · Span
- Stroop 1935
- Verbruggen 2008 · Go / No-Go
- Green & Bavelier 2003
- Corsi 1972 · spatial span
- Eriksen 1974 · flanker
- Yates 1966 · method of loci
- Inoue & Matsuzawa 2007 · chimp memory
- Lichtenstein & Fischhoff 1977 · calibration
- Selvin 1975 · Monty Hall
- Simons 2016 · evidence review