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SNKYO. Nate R. and Arin T. A Study on Adult Working Memory. Background. Feigenson , Carey, and Hauser 2002 Study involving crackers – suggested that infants cannot keep track of more than 3 objects in a chunk.

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snkyo

SNKYO

Nate R. and Arin T.

A Study on Adult Working Memory

background
Background
  • Feigenson, Carey, and Hauser 2002
    • Study involving crackers – suggested that infants cannot keep track of more than 3 objects in a chunk.
    • Each bucket represents a unit of memory or a chunk. In this case, chunks are delineated by the physical space between the buckets.

X

background1
Background
  • Feigenson & Halberda 2004
    • Showed that WM is not limited to tracking 3 objects per se but 3 chunks of representation, each of which may contain up to 3 objects.
    • Space can be the divider of chunks. Suggests that instead of representing each individual, WM groups objects into smaller and more manageable chunks…
  • Units in WM can be individuals or chunks… but what about large sets?
  • Feigenson 2008
    • In WM, what about larger number of things. How many boys and girls are in the lecture room?
    • Placed one type, 2 type, 3 types and 4 types of objects in two buckets
slide6

Sets in WM

What if the four objects have overlapping attributes- size and shape? In other words, each item is a member of more than one “set”

Differ in size, color, texture, shape, and category dimensions

Overlap in shape and size dimensions.

Overcome capacity limits?

2x2 overlapping sets
2X2 Overlapping Sets
  • Hypothesis
    • By taking advantage of overlaps among object attributes, WM efficiently keeps track of more than 3 sets at the same time.
  • Two attributes examined here are size and shape
    • Four individual objects – two blocks and two balls, each of which can be either large or small in size
slide8

Methods

Labeling Condition:

As objects are dropped in a bucket, the subject says either the shape or size of each object

Shape

Size

Probed

Dimension:

Subject is asked which bucket has more objects of one shape or size

Shape

Size

results
Results
  • Only the answer to the first question counts to eliminate bias
    • Congruent N=7 Incongruent N=4