This is from their research in which they showed that people with anterograde amnesia, unable to form new declarative memories, reported dreaming of falling shapes after playing Tetris during the day, despite not being able to remember playing the game at all.
Isto derivaríase das súas investigacións que demostraban que a xente con amnesia anterógrada, informaban soñar con formas caendo logo de ter xogado ao Tetris durante o día, a pesar de non seren capaces de recordar en absoluto ter xogado ese día.