Verbal fluency difficulties in aphasia: A combination of lexical and executive control deficits.
Arpita Bose, Abhijeet Patra, Georgia Eleftheria Antoniou and 2 others
PMID 35318784WHAT IT FOUND
People with aphasia struggle with both word retrieval and executive control.
They took longer to start speaking and switched categories less often. However, once they found a category, they generated similar numbers of words as controls, just more slowly.
Key findings
01People with aphasia produced significantly fewer correct words than controls in both semantic and letter fluency tasks.
02Executive control deficits were evident in a larger fluency difference score, indicating difficulty maintaining performance in the more demanding letter fluency condition.
03Cluster size and subsequent response time were not significantly different between groups, suggesting that the decline in recall rate and ability to generate words within a subcategory were preserved.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
Read the rest of this summary
You get three full summaries a month, free, and we do not ask for a card. Search, the TL;DRs and your library stay unlimited either way.
What it does not show
Small sample size (14 participants with aphasia) limits statistical power and generalizability. The cross-sectional design prevents conclusions about causality or recovery. Heterogeneity in aphasia type and severity means group averages may mask individual profiles.
Declared interests
The authors declare no conflict of interest.
The easy way to misread this
Do not interpret the similar cluster sizes as evidence that semantic processing is intact. The study shows that while people with aphasia can access words within a category, they take longer to do so and struggle to switch between categories, indicating combined lexical and executive control impairments.