How do I practice perceptual filters?

The most direct way to practice perceptual filters is through a focused exercise: Choose a routine environment — your commute, a work meeting, a meal. Before entering, write down one sentence about your current mood and one expectation you hold about what will happen. After, write down what you noticed. Compare the two lists. Where did your mood or expectation direct your attention? What might you have missed?

Common pitfall: Believing that knowing about perceptual filters neutralizes them. It does not. Awareness is necessary but not sufficient. The filters remain active even after you learn about them — the Hollow Face illusion fools you even after you know how it works. The practice is not to eliminate filters but to account for them, every time.

This practice connects to Phase 5 (Observation Without Judgment) — building it as a repeatable habit compounds over time.