Something that is perceptible can be detected or noticed by our senses. In psychology, it refers to the ability to perceive or become aware of a stimulus.
Related terms
Absolute Threshold: The lowest level at which a stimulus can be detected by our senses.
Just Noticeable Difference (JND): The smallest detectable difference between two stimuli.
Weber's Law: The principle that states that the just noticeable difference between two stimuli is proportional to the magnitude of the stimuli.