Aphantasia is a recently discovered disorder characterised by the total incapacity to generate visual forms of mental imagery. This paper proposes that aphantasia raises important theoretical concerns for the ongoing debate in the philosophy and science of consciousness over the nature of dreams. Recent studies of aphantasia and its neurobehavioral correlates reveal that the majority of aphantasics, whilst unable to produce visual imagery while awake, nevertheless retain the capacity to experience rich visual dreams. This finding constitutes a novel explanandum for (...) theories of dreaming. Specifically, I argue that the recent dream reports of aphantasics constitute an empirical challenge to the emerging family of views which claim that dreams are essentially imaginative experiences, constitutively involving the kinds of mental imagery which aphantasics, ex-hypothesi, lack. After presenting this challenge in the context of Jonathan Ichikawa’s recent arguments for this view, I argue that this empirical challenge may be overcome if the imagination theorist abandons Ichikawa’s account of dreaming in favour of a modified version. This involves the claim that dreams are essentially inactive and constitutively involve non voluntary forms of imagination. I conclude with a suggestion for further research which can test the viability of this alternative hypothesis, and move the debate forward. (shrink)

Much of the current imaging literature either denies the existence of wakeful non-mental imagers, views non-imagers motivationally as 'repressors' or 'neurotic', or acknowledges them but does not fully incorporate them into their models. Neurobiologists testing for imaging loss seem to assume that visual recognition, describing objects, and free-hand drawing require the forming of conscious images. The intuition that 'the psyche never thinks without an image.... the reasoning mind thinks its ideas in the form of images' (Aristotle) has a long tradition (...) in philosophical psychology, from Aristotle through the British empiricists to the British-empiricist-inspired introspection paradigm of Titchener. The massive shift in early experimental psychology to the introspective-antagonistic paradigm of Watson's behaviourism, may have sprung from the contrary intuition that no one thinks in mental images. In both cases, people seemed to assume that what is in one's own mind is in everybody's mind. A third, mediating, intuition - that some people do not think with conscious mental imagery -- seems to be confirmed by empirical studies on many levels. From the early imagery interviews of Francis Galton through many modern surveys, including my own, a consistent diversity of self-reports on ones own mental imagery abilities suggests that some 2-5% of people are very poor- or non-visual- imagers who, yet, maintain normal visual recognition abilities. Comparable estimates have been made in auditory and other imagery modalities. (shrink)