The Five Aggregates: Perceptions

The third [of the Five Aggregates] is the Aggregate of Perceptions (Saññākkhandha). Like sensations, perceptions also are of six kinds, in relation to six internal faculties and the corresponding six external objects. Like sensations, they are produced through the contact of our six faculties with the external world. It is the perceptions that recognize objects whether physical or mental.

What the Buddha Taught, p22