# Psychology

Source: https://decka.dev/classroom/psychology

Run psychology experiments on the room itself: every phone is a trial and every answer a data point. In the optical illusions game, students guess their own error, match two lines by eye, and watch the room’s matches land on a shared ruler, then match again after being told the truth. The boards show counts and the shape of the room’s answers, never names.

Or time the room on the Stroop effect: students name the ink of printed colour words against the clock on their phones, the projector shows the room's times as counts, and each phone shows its owner's own times beside the room's middle. Use the actual results to discuss attention and how an experiment is designed.

- [Optical Illusions Game for Class — How Much Does the Room Get Fooled?](https://decka.dev/classroom/psychology/optical-illusions-game.md): An optical illusions game for class: every phone matches two lines by eye, and the room's matches land on a shared ruler that shows how far it was fooled.
- [Stroop Effect Experiment for the Classroom, Timed on Phones](https://decka.dev/classroom/psychology/stroop-effect.md): Run the Stroop effect live: every student times four colour-word cards on their phone, then sees how much the words slowed the whole room, person by person.