PSY645 FINAL Questions and
Correct Answers (100% Pass)
visual imagery
✓ seeing in the absence of a visual stimulus
Mental Imagery
✓ Recreating the sensory world in the absence of mental stimuli
what do mental images involve
✓ mental images involve spatial representations
mental rotation experiment
✓ Mental rotation experiment (Shepard & Metzler, 1971): Reaction times
to indicate the same/different was longer for greater differences in
orientation. Shows that participants are mentally rotating the images in
their minds, and the manipulation of mental images corresponds to the
actual position in space
Kosslyn Mental Scanning
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✓ Kosslyn (1973): participants memorized the image of the boat and
were asked to move between different parts of the boat in their minds.
The length of time of the mental scan corresponds to the distances in
the boat picture.
kosslyn island mental scanning
✓ Kosslyn and coworkers (1979) island experiment: mentally scanned
between more locations (vs. boat exp) and found a positive
correlation between scan time and the physical distance between
locations on the private of the island.
Pylyshyn (1973)
✓ Pylyshyn (1973) believed that imagery is based on propositional
representations and not spatial/depictive representations.
✓ Spatial representation is an epiphenomenon
Size in the visual field task (kosslyn)
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✓ Size in the visual field task (kosslyn)
✓ Asked participants to walk up to different sized animals in their minds
until visual overflow was experienced
✓ Estimates of distances to achieve this corresponded to what would
happen in perception and differed by the size of the animal
Perky (1910): interactions of imagery and perception
✓ Projected a dim image on a screen
✓ Asked participants to imagine an image. Reports of their visual images
corresponded to the actual projected image, even though they were
unaware it was there
Farah (1985): interactions of imagery and perception
✓ Participants imagined a letter
✓ Had to indicate if actual letter flashes were on the first or second
screen
✓ More accurate on this task if they imagined the same letter that
appeared on the screen
Kreiman and coworkers (2000):
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