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Visual short-term memory capacity in...

Bertin, Evelin.

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Visual short-term memory capacity in infancy: Short-term retention of object feature and conjunction information.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Visual short-term memory capacity in infancy: Short-term retention of object feature and conjunction information./
作者:	Bertin, Evelin.
面頁冊數:	125 p.
附註:	Source: Dissertation Abstracts International, Volume: 64-07, Section: B, page: 3563.
Contained By:	Dissertation Abstracts International64-07B.
標題:	Psychology, Experimental. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3097379
ISBN:	0496449931

Visual short-term memory capacity in infancy: Short-term retention of object feature and conjunction information.
Bertin, Evelin.

Visual short-term memory capacity in infancy: Short-term retention of object feature and conjunction information. - 125 p.

Source: Dissertation Abstracts International, Volume: 64-07, Section: B, page: 3563.

Thesis (Ph.D.)--University of Kentucky, 2003.

The present research investigated developmental changes in the amount of information that infants can hold in visual short-term memory (STM) as well as the type of information that is represented in this temporary storage system. A visual span task was developed in which 3-, 5-, and 9-month-olds were presented with two-, three-, and four-item spans containing colored shapes (Experiment 1). After each spans' familiarization phase, infants were tested for their recognition of previously experienced span items. The results revealed that 9-month-olds recognized a previously seen item after a four-item, 5-month-olds after a three-item, and 3-month-olds after a two-item span familiarization indicating that the capacity for visual information increases with age. Thus, it seems that visual STM capacity, along with many other aspects of perception and memory, undergoes developmental changes within the first year of life.

ISBN: 0496449931Subjects--Topical Terms:

517106
Psychology, Experimental.

Visual short-term memory capacity in infancy: Short-term retention of object feature and conjunction information.
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245 1 0 $a Visual short-term memory capacity in infancy: Short-term retention of object feature and conjunction information.
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500 $a Source: Dissertation Abstracts International, Volume: 64-07, Section: B, page: 3563.
500 $a Director: Ramesh S. Bhatt.
502 $a Thesis (Ph.D.)--University of Kentucky, 2003.
520 $a The present research investigated developmental changes in the amount of information that infants can hold in visual short-term memory (STM) as well as the type of information that is represented in this temporary storage system. A visual span task was developed in which 3-, 5-, and 9-month-olds were presented with two-, three-, and four-item spans containing colored shapes (Experiment 1). After each spans' familiarization phase, infants were tested for their recognition of previously experienced span items. The results revealed that 9-month-olds recognized a previously seen item after a four-item, 5-month-olds after a three-item, and 3-month-olds after a two-item span familiarization indicating that the capacity for visual information increases with age. Thus, it seems that visual STM capacity, along with many other aspects of perception and memory, undergoes developmental changes within the first year of life.
520 $a Experiment 2 investigated the nature of the representations that are stored in this memory system. In particular, whether or not previously experienced object features (color and shape) and conjunction information (what color goes with what shape) are equally well represented in visual STM was investigated. Two storage hypotheses---object-based and feature-based ---were tested for their ability to describe the nature of infants' object representations. The object-based storage hypothesis posits that objects are stored as integrated units, with feature and conjunction of information equally well available, whereas the feature-based storage hypothesis argues that conjunction information is not necessarily maintained in visual STM to the same extent as feature information. Using the same general procedures as in Experiment 1, 5-month-olds were familiarized to two- and three-item spans, and subsequently tested for their recognition memory of object feature and conjunction information. The results revealed that feature and conjunction information are not equally well represented in 5-month-olds' visual STM. Information about previously experienced object color was retained, but not object shape or color-shape conjunction information. Moreover, color information held in visual STM weakened with increasing memory load. The data indicate that 5-month-old infants' object percepts are better described by the feature-based storage hypothesis.
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