# Philosophy and Psychology of Hallucination-An Introduction **Opening (not a real abstract):** Forthcoming!in!F.!Macpherson!and!D.!Platchais!(eds.)!Hallucination:+Philosophy+and+ ! ! The!Philosophy!and!Psychology!of!Hallucination:!An!Introduction! Fiona!Macpherson! ! Few!phenomena!have!played!such!a!vital!role!in!shaping!philosophical!theories!as! hallucination,!particularly!theories!in!philosophy!of!mind,!perception,!and! epistemology.!When!the!ordinary!man!or!woman!in!the!street!thinks!of! hallucination,!a!drugFfueled!bizarre!perceptual!experience!is!conventionally!what! springs!to!mind.!The!traditional!philosophical!conception!of!hallucination! encompasses!such!experience!but!is!broader.!The!traditional!philosophical! conception!includes!perceptual!experiences,!identical!in!nature!to!experiences!that! could!be!had!whilst!perceiving!the!world,!save!only!that!they!are!had!whilst!not!