Age of acquisition affects object recognition and naming in patients with Alzheimer's disease

Selina Holmes; F J  Fitch; A W  Ellis

doi:10.1080/13803390591004392

Age of acquisition affects object recognition and naming in patients with Alzheimer's disease

Selina Holmes, F J Fitch, A W Ellis

Psychology

Research output: Contribution to journal › Article › peer-review

Abstract

Twenty-two patients with a diagnosis of dementia of the Alzheimer type (DAT) and a comparison group of 22 age-matched individuals took part in an object decision and picture naming task. The age of acquisition (AoA) of the picture names was manipulated (25 early, 25 late). The comparison group identified significantly more objects as real than the patients. While the comparison group made very few errors in object decision, DAT patients failed to classify significantly more late than early acquired objects as real. The patients also named significantly fewer pictures than the comparison group, showing a differential impairment in naming late acquired objects. Late acquired objects induced proportionately more visual errors in the patients than did early acquired objects. The results are discussed in terms of current theories of age of acquisition and of the impact of Alzheimer's disease on lexical and semantic processing.

Original language	English
Pages (from-to)	1010-1022
Number of pages	13
Journal	JOURNAL OF CLINICAL AND EXPERIMENTAL NEUROPSYCHOLOGY
Volume	28
Issue number	6
DOIs	https://doi.org/10.1080/13803390591004392
Publication status	Published - Aug 2006

Keywords

CUMULATIVE-FREQUENCY HYPOTHESIS
SEMANTIC MEMORY IMPAIRMENT
PROGRESSIVE APHASIA
VISUAL COMPLEXITY
WORD-FREQUENCY
FAMILIARITY
KNOWLEDGE
DEMENTIA
PICTURES
MATTERS

Access to Document

10.1080/13803390591004392

Cite this

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title = "Age of acquisition affects object recognition and naming in patients with Alzheimer's disease",

abstract = "Twenty-two patients with a diagnosis of dementia of the Alzheimer type (DAT) and a comparison group of 22 age-matched individuals took part in an object decision and picture naming task. The age of acquisition (AoA) of the picture names was manipulated (25 early, 25 late). The comparison group identified significantly more objects as real than the patients. While the comparison group made very few errors in object decision, DAT patients failed to classify significantly more late than early acquired objects as real. The patients also named significantly fewer pictures than the comparison group, showing a differential impairment in naming late acquired objects. Late acquired objects induced proportionately more visual errors in the patients than did early acquired objects. The results are discussed in terms of current theories of age of acquisition and of the impact of Alzheimer's disease on lexical and semantic processing.",

keywords = "CUMULATIVE-FREQUENCY HYPOTHESIS, SEMANTIC MEMORY IMPAIRMENT, PROGRESSIVE APHASIA, VISUAL COMPLEXITY, WORD-FREQUENCY, FAMILIARITY, KNOWLEDGE, DEMENTIA, PICTURES, MATTERS",

author = "Selina Holmes and Fitch, {F J} and Ellis, {A W}",

year = "2006",

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doi = "10.1080/13803390591004392",

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AU - Ellis, A W

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AB - Twenty-two patients with a diagnosis of dementia of the Alzheimer type (DAT) and a comparison group of 22 age-matched individuals took part in an object decision and picture naming task. The age of acquisition (AoA) of the picture names was manipulated (25 early, 25 late). The comparison group identified significantly more objects as real than the patients. While the comparison group made very few errors in object decision, DAT patients failed to classify significantly more late than early acquired objects as real. The patients also named significantly fewer pictures than the comparison group, showing a differential impairment in naming late acquired objects. Late acquired objects induced proportionately more visual errors in the patients than did early acquired objects. The results are discussed in terms of current theories of age of acquisition and of the impact of Alzheimer's disease on lexical and semantic processing.

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