Sheer torture, these Play Tests. The players are alone before their screens. They're filmed and observed from behind a two-way mirror. Everything is recorded, their voices, their faces, their games, in order to figure out what they're feeling. It's really unbearable to watch them stumbling over simple things, looking for the way through when it's obvious, not doing what they're supposed to do. Unbearable but informative.
[...]You see them not understanding anything, doing the first thing that comes into their heads, getting stuck for twenty minutes on actions that should take one. We see them not reading the instruction, not remembering what they did in the last scene, doing everything except what they're supposed to do. So we scream behind the soundproofed glass, we insult them, curse them, foaming at the mouth, we shrivel up, we beg to be released.