Which kinds of sensory experience are important to empiricist philosophy?

In empiricist philosophy, the primary sources of experience are those arising from the stimulation of the sense organs, specifically visual, auditory, tactile, olfactory, and gustatory sensation. Some empiricists also include kinesthetic sensation, or the sense of movement, as a valid form of experience.1

Beyond these external senses, most empiricists acknowledge a form of "inner sense" or reflection, which involves the awareness of internal mental states, such as feeling pain, fear, or pleasure. For example, David Hume categorized perceptions into two types:12
* Impressions: Vivid perceptions that the mind experiences with force, including both sensory impressions and those of reflection (such as desire or aversion).2
* Ideas: Faint images or "thoughts" derived from these impressions.2

While the core of empiricism relies on these sensory and reflective experiences, the status of other types of experience—such as moral, aesthetic, or religious—remains a subject of philosophical debate regarding whether they should be classified as empirical.1