Here is your pdf: Measuring the World – Olfaction as a process model of perception

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Access date: 2019-02-13 14:27:01.869555

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1 Abstract

How much does stimulus input shape perception? The common

-sense view is that our

perceptions are representations of objects and their features and that the stimulus structures the

perceptual object. The problem for this view concerns perceptual biases as r

esponsible for

distortions and the subjectivity of perceptual experience. These biases are increasingly studied as

constitutive factors of brain processes in recent neuroscience. In neural network models the brain

is said to cope with the plethora of senso

ry information by predicting stimulus regularities on

the

basis of

previous experiences. Drawing on this development, this chapter analy

ses perceptions as

processes. Looking at olfaction as a model system, it argues for the need to abandon a stimulus

-centr

ed perspective

, where smells are thought of as stable percepts

, computationally linked to

external objects such as odorous molecules. Perception here is presented as a measure of

changing signal ratios in

an

environment informed by expectancy effects from

top

-down

processes.

Keywords

anticipation;

computationalism;

forecasting; neural networks;

neuroscience;

olfaction; perceptual

bias

; predictive coding; smell

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