Visual illusions are primarily of interest to researchers studying perception because they:Group of answer choicesA. provide valuable information on sensory adaptation.B. provide information about how key photopigments in the retina function.C. provide important information about how perceptual processes work under normal conditions.D. represent instances in which the dual-process theory of vision fails.

Visual perception involves the organization and interpretation of information obtained from visible light.  Visual perception relies on monocular and binocular cues, as well as perceptual organization principles that allow humans to interpret limited or partial information more holistically.  These sorts of mental shortcuts are based on prior experiences and knowledge, and are especially useful when lighting or perspective is limited.  For example, the ambiguous image in Figure 1 is often perceived as a cup.Figure 1  Ambiguous imagePerceptual organization principles allow our brains to quickly and efficiently make assumptions about visual inputs, but these principles can also give rise to perceptual illusions.  For example, the Ames room is constructed to exploit monocular depth cues in such a way that the person standing on one side of the room appears to impossibly dwarf the person on the other side of the room (Figure 2).Figure 2  Ames room illusion (two people standing in a specially constructed Ames room, viewed through a monocular peephole)Human senses were adapted for use on land, which can lead to potentially deadly perceptual distortions while flying or underwater diving.  Pilots are prone to such perceptual distortions when landing on unfamiliar runways.  During their training, pilots develop a mental image of how a typical runway appears as they descend and land.  Later, they compare this prototypical shape to the runway they see before them to make adjustments in the slope of their descent.  However, if a runway differs from what the pilot is used to (eg, in width or slope), it will differ from the pilot's mental image for a typical runway at that same altitude.  For example, an unusually wide runway will appear to be closer than it actually is, and a narrow runway will seem to be further away.  This can cause the pilot to approach at a dangerously steep or shallow slope.Pilots and divers can also suffer from spatial disorientation due to variations in sensory stimuli that are not typically encountered on land.  For example, gravity is not experienced in the body the same way underwater as on land, and visual cues are often limited in deep dives.  In these murky conditions, divers can easily lose track of the surface of the water, leading to extreme spatial disorientation and panic. Question 1Which of the following predictions is best supported by information presented in the passage?A.Individuals will perceive a cup in Figure 1 despite differences in expectations.B.Visual principles of perceptual organization help prevent optical illusions from occurring.C.According to the law of continuity, spatial disorientation will be greater under water than in the air.D.The Ames room configuration will override the perceptual principle of size constancy.

Perception involvesMultiple Choicethe layer of the eye that light passes through.part of your retina that lets you see black and white.stimuli that produce errors in perception.the interpretation and integration of stimuli to which our senses are exposed.

The _________ view of perceptual processing emphasizes the role of sensory data in determining what is perceived.Question 6Answera.bottomupb.diverging operationsc.converging operationsd.topdown

Which sense is most involved in perception?Group of answer choicesTouchSmellTasteSight

Focusing on some aspects of the environment and ignoring other elements is called:Question 24Answera.Optical illusionb.Selective attentionc.Visual perceptiond.Bias in perception