Sensory biases are subconscious prejudices that exist in the sensory system towards certain centripetal stimuli. They may be preferences gained from engaging in one behaviour which extend beyond this initial behaviour, influencing extraneous sensory driven choices (Fuller, 2009) or stochastic by-products of an organisms genetic make-up (Endler & Basolo, 1998). Enquist and Arak (1994) illustrate via artificial neural network models that visual sensorial predispositions may be spandrels of the need to identify and distinguish objects regardless of their location or orientation in an individuals field of vision. This sensory bias hypothesis has been validated in multiple empirical studies; Rodd et al. (2002) found that in certain guppy populations, female foraging preferences account for 94% of the inter-population deviation in female breeding predilections for orange sexual ornaments on males. Similarly, a studies undertaken by Elliot et al. (2010) and Roberts et al. (2010) both found that women find men who wear red to be more sexually attractive than those who wear identical fit clothing of other colours. Verpooten (2009) credits these psychosensory biases as having a considerable role in the genesis and proliferation of all creative behaviour. . This could be applied to fashion as both a compliment to sexual selection theory, and as a direct replacement. Creative behaviour may have originated as an attempt to replicate pleasurable emotions derived from past sensory-driven experiences. Concomitantly, although sexual selection theory may be responsible for the dissemination of artistic behaviour (Miller, 2001), a yearning to reproduce previous sensorially pleasurable experiences may have been the initial trigger (Verpooten, 2009). This is because a suitor would have no way to know if a particular creative behaviour would be sexually desirable if it has never been done before – thus his original actions may have been purely for self-gratification, however, upon understanding that said actions are viewed as desirable, these actions would be repeated and more widely engaged in.
Professor of Neuroesthetics at the University College London, Semir Zeki, is well known for his pioneering work on the neurological motivations which drive our appreciation of the arts. In an article for Science (2001, p.51), Zeki notes how orientation selective cells, which are present in the primary visual cortex (V1) “respond selectively to straight lines”. This, Zeki postulates, explicates to an extent, the pleasure that we derive from line-based art, such as that of Mondrian. Similarly, Enquist and Arak (1994) note that humans have a predisposition towards symmetrical patterns. It would be expected that these cells would respond similarly to the line-based patterns which feature recurrently in the collections of many designers. Many of the most enduring patterns such as stripes, plaids, tartan, gingham etc. are line-based; the fact that such patterns have appeared on clothing since the time of the ancient Greeks (Racinet, 1888), possibly longer, adds credence to this theory. Different patterns stimulate the visual cortex in different ways – possibly providing us with motivation to see more, and ultimately to own more. Thus, it is possible that our avaricious craving for new designs season after season is catalysed by the stimulation which fashion provides for our visual cortex. Of course not all fashion is visually pleasing. Some designers such as, amongst others, Rei Kawakubo purposefully adopt an atypical aesthetic; espousing unusual asymmetrical shapes (van der Zwaag, 2006). For such instances, sexual selection theory provides more apt explanations.
Miller (2001, p.144) concurs largely with Zeki, describing V1, as “a set of edge detectors”, furthermore, Miller (2001) posits that it is evolutionarily easier to adapt to this visual preference by altering the patterns on one’s plumage, beak or fur than to change one’s overall shape. Miller (2001) goes further than this still – he also suggests that animals may utilize this visual preference as a tactic to attract a mate. Indeed, Homo Sapien Sapiens are not the only species which find straight lines visually stimulating; this attribute is a homogeny present in a diverse range of species right across animalia. Some animals exploit this visual stimulus by using lines on the body as a sexual ornament. Animals such as the pipefish (Berglund & Rosenqvist, 2001), the yellow-eyed penguin (Cuervo et al., 2009) and the Mandrill (Setchell et al. 2006) have all developed this adaptation. Fuller (2009, p.1697) states that sensory bias theory may mean that “males should evolve traits that maximally stimulate the senses of females”. Consequently, one may reason that as humans may manipulate their appearance through the use of clothing, that a permanent sexual ornament such as the yellow-eyed penguins beak, is not only wholly unnecessary, but also disadvantageous. Humans can change outfits at will, thus having a potentially unlimited number of opportunities to stimulate the V1 of a desired mate. Ergo, one could reason that clothing, costume and fashion originated and proliferated as attraction devices designed to appeal to the senses of potential mates. The greater the selection of clothing, the more ways to attract.