Help
Options
Question
cue approach to depth perception
click to flip
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't know
Question
accommodation
Remaining cards (49)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
PSY 164 Ch 7-9
Sensation and Perception; for Test #2
| Question | Answer |
|---|---|
| cue approach to depth perception | depth perception results from monocular cues, binocular cues from comparison of images in both eyes, and focus cues such as mergence and accommodation |
| accommodation | adjusting the lens of the eye so that both near and far objects can be seen clearly |
| vergence | the inward bending of the eyes when looking at closer objects |
| monocular depth cues | depth cues that require only one eye |
| pictorial cues | info about depth that can be inferred from a static picture |
| movement-based cues | cues about depth that can be seen with a single eye in which the inference of distance comes from motion |
| occlusion | visual cue when one object partially hides or obstructs the view of a second object; we infer that the hidden object is farther away |
| relative height | objects closer to the horizon are seen a more distant |
| relative size | the more distant an object, the smaller the image on the retina |
| familiar size | knowing the retinal size of a familiar object lets us infer the distance |
| linear perspective | pictorial depth cue; parallel lines appear to converge as they recede into the distance |
| texture gradient | monocular depth cue; occurs because textures become finer as they recede into the distance |
| atmospheric perspective | pictorial depth cue; objects in distance appear blurred and bluish |
| shadows | angle of shadow can provide us with info on how far the object casting the shadow is in front of the background |
| motion parallax | monocular depth cue; relative velocities of objects moving across the retinae of a moving person: closer objects appear to move faster, as do smaller objects |
| deletion | gradual occlusion of a moving object as it passes behind another object |
| accretion | gradual reappearance of an object as it emerges from behind the obscuring object (ex. solar eclipse) |
| optic flow | motion depth cue; involves the relative motion of objects as the observer moves forward or backward in a scene, smaller objects move faster as do closer ones |
| stereopsis | sense of depth perceived from the visual system's comparison of two images on the retinae |
| horopter | region in space where two images from an object fall on corresponding locations on the two retinae |
| Panama's area of fusion | region of small disparity around horopter where the two images can be fused into a single perception |
| diplopia | double images; usually results from the images of an object having too much disparity to lead to fusion |
| crossed disparity | direction of disparity for objects in front of the horopter |
| uncrossed disparity | direction of disparity for objects behind the horopter |
| zero disparity | situation in which retinal images fall on corresponding points, which means the object is along the horopter |
| correspondence problem (depth perception) | the problem of determining which image in one eye matches the correct image in the other eye |
| random-dot stereograms | the images consist of a randomly arranged set of black and white dots, create either crossed or uncrossed disparity |
| size-distance invariance | the relation between perceived size and perceived distance, and the way they interact |
| visual angle | the angle of an object relative to the observer's eye |
| size constancy | the perception of an object having a fixed size, despite the change in the size of visual angle that accompanies changes in distance |
| motion | a change in position over time |
| real motion | motion in the world created by continual change in the position of an object relative to some frame of reference |
| apparent motion | the appearance of real motion from a sequence of still images |
| correspondence problem (motion perception) | how the visual system knows if an object seen at Time 1 is the same object at Time 2 |
| induced motion | an illusion whereby one moving object may cause another object to look like it is moving; for example the airport appearing to move when you back out in a plane |
| Reichardt detectors | neural circuits that enable the determination of direction and speed of motion by delaying input from one receptive field, to determine speed, to match the input of another receptive field, to determine direction |
| corollary discharge theory | the feedback we get from our eye muscles as our eyes track an object is important to our perception of motion |
| saccades | most common and rapid of eye movements, sudden eye movements used to look from one object to another |
| smooth-pursuit eye movements | voluntary tracking eye movements of an object in motion |
| MT (V5) | an area of the occipital lobe in the dorsal pathway, specific to motion detection and perception |
| akinetopsia | motion blindness; rare condition in which a person is unable to detect motion despite intact visual perception of stationary stimuli, caused by damage to area MT/V5 |
| motion aftereffect | motion-based visual illusion in which a stationary object is seen as moving in the opposite direction of real or apparent motion just observed (end credits, for example) |
| point-light walker display | an experiment in which small lights are attached to the body of a person or animal, who is them filmed moving in otherwise dark environments |
| affordance | info in the visual world that specifies how that info can be used; seeing a piano affords playing music |
| optic flow | relative motions of objects as an observer moves forward or backward in a scene |
| gradient of flow | difference in the perception of the speeds of objects moving past us in an optic flow display |
| focus of expansion | destination point in an optic flow display, from which point perceived motion derives |
| lateral intraparietal (LIP) area | an area of the primate parietal cortex involved in the control of eye movements |
| medial intraparietal (MIP) area | area of the posterior parietal lobe involved in the planning or control of reaching movements of the arms |
| anterior intraparietal (AIP) area | region of the posterior parietal lobe involved in the act of grasping |
Created by:
booklover