Document Detail


Whole report uncovers correctly identified but incorrectly placed target information under visual crowding.
MedLine Citation:
PMID:  22782439     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Multiletter identification studies often find correctly identified letters being reported in wrong positions. However, how position uncertainty impacts crowding in peripheral vision is not fully understood. The observation of a flanker being reported as the central target cannot be taken as unequivocal evidence for position misperception because the observers could be biased to report a more identifiable flanker when failing to identify the central target. In addition, it has never been reported whether a correctly identified central target can be perceived at a flanker position under crowding. Empirical investigation into this possibility holds the key to demonstrating letter-level position uncertainty in crowding, because the position errors of the least identifiable central target cannot be attributed to response bias. We asked normally-sighted observers to report either the central target of a trigram (partial report) or all three characters (whole report). The results showed that, for radially arranged trigrams, the rate of reporting the central target regardless of the reported position in the whole report was significantly higher than the partial report rate, and the extra target reports mostly ended up in flanker positions. Error analysis indicated that target-flanker position swapping and misalignment (lateral shift of the target and one flanker) underlay this target misplacement. Our results thus establish target misplacement as a source of crowding errors and ascertain the role of letter-level position uncertainty in crowding.
Authors:
Jun-Yun Zhang; Gong-Liang Zhang; Lei Liu; Cong Yu
Related Documents :
20118099 - Neonatal lupus erythematosus: three case reports and review of the chinese literature.
11771799 - Vertebral sarcoidosis of the spine in a football player.
22266259 - Joaquín maría albarrán y domínguez (1860-1912). in the centenary of his death.
7355329 - Coexistence of systemic lupus erythematosus and myasthenia gravis.
16757369 - Pancreatic sarcoidosis: unusual presentation resembling a periampullary malignancy.
10342389 - Human parvovirus b19 infection: its relationship with systemic lupus erythematosus.
17378689 - Isolated juvenile xanthogranuloma in the bone marrow: report of a case and review of th...
20649899 - What's new in atopic eczema? an analysis of systematic reviews published in 2008 and 2009.
15783109 - Bulbar urethral polyp mimicking a urethral stricture--report of case with review of lit...
Publication Detail:
Type:  Journal Article     Date:  2012-07-10
Journal Detail:
Title:  Journal of vision     Volume:  12     ISSN:  1534-7362     ISO Abbreviation:  J Vis     Publication Date:  2012  
Date Detail:
Created Date:  2012-07-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101147197     Medline TA:  J Vis     Country:  United States    
Other Details:
Languages:  eng     Pagination:  -     Citation Subset:  IM    
Affiliation:
State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, China.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Voriconazole for chronic pulmonary aspergillosis: a prospective multicenter trial.
Next Document:  Surgical Outcomes After Resection of Both Hepatic and Pulmonary Metastases From Colorectal Cancer.