Perception is an active and constructive process We used quick and dirty estimate of the world This can lead to misinterpretations of the world Visual illusions Change Detection A compelling change detection study demonstrates that our experience of a picture-like visual world may be an illusion. – when you look at the same picture with a slight difference for a few milliseconds, you do not necessarily see the change. - Change blindness - the failure to consciously detect an obvious change in a scene. - Grand illusion of perception -the illusion that what we see in our visual field is a clear and detailed picture of the world - contrary to our subjective experience, we likely process only one or two objects in detail at any given moment. Feature Integration Theory What we perceive is not a faithful and detailed view of the world but an assortment of mostly disconnected features. Feature integration theory (FIT): when we initially view objects in our field of vision we unconsciously extract their features (color, orientation) across the whole scene being viewed through a process called preattentive processing (the unconscious extraction of features that must take place before we can perceive an object). - FIT assumes that for an object to be consciously perceived as a whole object, its features must be ‘’bound’’ together. - This feature binding takes place when attention is applied to the features in a given region of the visual field.
The Constraints of the Visual SystemA high-fidelity percept of the world is not possible because:
You've reached the end of your free preview.
Want to read all 13 pages?
- Winter '08