Cognitive Psychology Object Files, Mitroff et al
Terms
undefined, object
copy deck
- What is cohesion?
- an object must always maintian a single bounded contour
- Do OSPB persist through cohesion violations?
- Not fully
- What is a low-level visual feature?
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colors, size, shape
"it's red" - What is a higher-level object type?
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object identification
"it's a duck" - What is an object file?
- A midlevel visual representation that "sticks" to a moving object over time on the basis of spatiotemporal properties and stores (and updates) information about that object's properties
- What is an object-specific preview benefit?
- Faster to name final letter when its on the same object that it was initially
- What is the object-reviewing paradigm?
- Number of objects shown, letters on two; objects move, then a letter appears on one of the objects, must name that letter
- What are three possible outcomes of splitting a moving object into two?
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1) Obliterate object file's contents
2) Survive the splitting intact, but stay bound to only one of the two objects
3) Be "copied" to both of the two resulting objects - How did the trials begin?
- Two circles presented as black outlines on a white background, on which a letter soon appeared
- What is the splitting condition?
- One gradually split into two identical circle, one moving upward and one moving downward
- What is the trajectory-change condition?
- One followed one of the upward or downward paths from the splitting condition
- What was the purpose of the trajectory-change condition?
- A control
- What change did Mitroff et al make from the object-reviewing paradigm?
- Press key to indicate one of two options: target letter was same as a preview letter or it was different
- What is a no-match trial?
- Target letter did not appear in either of the original circles.
- What is a match trial?
- Target letter apears in one of the original circles
- What is a congruent match trial?
- Target letter same as preview letter that initially appeared on that circle
- What is an incongruent match trial?
- Target letter same as preview letter that initially appeared on the OTHER initial circle
- Did the condition affect the accuracy?
- no (means that people do not have a harder time identifying a split)
- What was the displaywide priming effect?
- Responses on no-match trials were significantly slower than responses on either types of match trials
- How was the OSPB defined?
- As the difference between congruent-match and incongruent-match trials
- What OSPBs were most adversely affected by the changes?
- The upward and downward split
- What is the conclusion of this experiment?
- That the maintenance of object files of adult visual cognition is constrained by a principle of cohesion
- What are the two interpertations of results?
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1) Survived splitting, but went with only one of the objects
2) Split in half, strength halved - Which interpretation is more likely?
- Split in half, strength halved-- no bimodality in the data