Repeating Without Semantics: Surface Dysphasia?

  title={Repeating Without Semantics: Surface Dysphasia?},
  author={Rosaleen Mccarthy and Elizabeth K. Warrington},
  pages={77 - 87}
We describe our investigations of MNA, who had a progressive, severe and global loss of semantic knowledge (semantic dementia). Her verbal vocabulary was restricted to a few common words and she was also unable to recognize common objects from sight. By contrast, she had a well-preserved digit span (7–8 digits). In this series of experiments, we focused on her ability to repeat lists and sentences in which familiarity, meaningfulness, morphology and syntactic structure were manipulated. In list… 

Phonological learning in semantic dementia

What does a patient with semantic dementia remember in verbal short-term memory? Order and sound but not words

Data provide further support for the proposal that language knowledge is a major determining factor of verbal STM capacity, but they also highlight the necessary distinction of processes involved in item and order recall, as proposed by recent models of STM.

A semantic contribution to nonword recall? Evidence for intact phonological processes in semantic dementia

The recall advantage for semantically known over degraded items also extended to a nonverbal delayed picture copying task, suggesting that the patients' immediate serial recall impairments were underpinned by a central semantic deficit, and not by a separable lexical deficit.

Deep dysphasia as a phonetic input deficit: Evidence from a single case

Background: The syndrome of deep dysphasia is characterised by an inability to repeat pseudowords and the production of semantic errors in word repetition. Several single case studies revealed that

When does word meaning affect immediate serial recall in semantic dementia?

This study examined the effect of several methodological factors on the recall of known and degraded words in 4 patients with semantic dementia, finding that semantic degradation influenced the rate of learning in the immediate recall task when the same items were presented repeatedly.

Primary Progressive Aphasia: A Review

It is concluded that there is sufficiently consistent and converging evidence from clinical and imaging studies to support the claim that PNFA and SD are distinct subgroups of PPA, but there does not appear to be sufficient evidence at this point to support further discrimination within these progressive aphasic subgroups.

The Role of Semantic Knowledge in Short-term Memory

Overall, FK was significantly better at recalling lists of known compared with unknown words, and showed a relatively normal primacy effect in immediate recall, but a striking lack of a recency effect.



Semantic dementia. Progressive fluent aphasia with temporal lobe atrophy.

The term semantic dementia is proposed, first coined by Snowden et al. (1989), to designate this clinical syndrome characterized by fluent dysphasia with severe anomia, reduced vocabulary and prominent impairment of single-word comprehension, progressing to a stage of virtually complete dissolution of the semantic components of language.

The double dissociation of short-term memory for lists and sentences. Evidence from aphasia.

The evidence indicates two dissociable short-term memory systems, one a relatively passive phonological store subserving list repetition, the other a dynamic, anticipatory, and integrative memory system which underpins sentence repetition.

The Impact of Semantic Memory Loss on Phonological Representations

Three patients with semantic dementia, involving progressive deterioration of semantic memory, performed immediate serial recall of short sequences of familiar words, with a marked advantage in recall of known as compared to familiar but now unknown words.

Semantic Memory Impairment Does Not Impact on Phonological and Orthographic Processing in a Case of Developmental Hyperlexia

Findings support the assertion that both orthographic and phonological whole-word representations can be acquired, stored, and retrieved in the absence of a functional link to semantic memory.

Nonfluent progressive aphasia and semantic dementia: a comparative neuropsychological study.

2 forms of progressive aphasia, nonfluent and fluent, are argued to be distinct in their manifestations and to have in common the sparing of perceptual and visuospatial skills, nonverbal problem solving abilities, and day-to-day memory.

Concrete word dyslexia.

An experimental investigation of a single patient, CAV, with an acquired dyslexia in which there was a significant impairment in his ability to read concrete words compared with abstract words is reported, it is argued that this concrete word reading deficit provides a further example of category specificity in the organization of the semantic systems subserving reading.

The Selective Impairment of Semantic Memory

  • E. Warrington
  • Psychology
    The Quarterly journal of experimental psychology
  • 1975
Evidence is presented that this impairment of semantic memory cannot be accounted for by intellectual impairment, sensory or perceptual deficits, or expressive language disorder, and some tentative evidence for the structural basis for a hierarchically organized modality-specific semantic memory system is discussed.

Lexical and Semantic Binding Effects in Short-term Memory: Evidence from Semantic Dementia

Two case studies are presented of the short-term memory performance of patients with semantic dementia. The first case showed a pervasive pattern of semantic effects in his auditory verbal short-term

Psycholinguistic assessments of language processing in aphasia (PALPA)

Intended both as a clinical instrument and research tool, PALPA is a set of resource materials enabling the user to select language tasks that can be tailored to the investigation of an individual patient's impaired and intact abilities.

Response Biases in Oral Reading: An Account of the Co occurrence of Surface Dyslexia and Semantic Dementia

  • E. Funnell
  • Psychology
    The Quarterly journal of experimental psychology. A, Human experimental psychology
  • 1996
A case study of a subject with a progressive impairment of semantic memory and a coincident surface dyslexia was reported and it was shown that when vestiges of word meaning remained, a lexical response was preferred, but when meaning was lost entirely, the evidence derived from sublexical processing appeared to bias selection of the response towards the regularized form.