Faculty Collaboration Database

More Than the Verbal Stimulus Matters: Visual Attention in Language Assessment for People With Aphasia Using Multiple-Choice Image Displays. J Speech Lang Hear Res 2017 May 24;60(5):1348-1361

Date

05/19/2017

Pubmed ID

28520866

Pubmed Central ID

PMC5755551

DOI

10.1044/2017_JSLHR-L-16-0087

Scopus ID

2-s2.0-85019762206 (requires institutional sign-in at Scopus site)   9 Citations

Abstract

PURPOSE: Language comprehension in people with aphasia (PWA) is frequently evaluated using multiple-choice displays: PWA are asked to choose the image that best corresponds to the verbal stimulus in a display. When a nontarget image is selected, comprehension failure is assumed. However, stimulus-driven factors unrelated to linguistic comprehension may influence performance. In this study we explore the influence of physical image characteristics of multiple-choice image displays on visual attention allocation by PWA.

METHOD: Eye fixations of 41 PWA were recorded while they viewed 40 multiple-choice image sets presented with and without verbal stimuli. Within each display, 3 images (majority images) were the same and 1 (singleton image) differed in terms of 1 image characteristic. The mean proportion of fixation duration (PFD) allocated across majority images was compared against the PFD allocated to singleton images.

RESULTS: PWA allocated significantly greater PFD to the singleton than to the majority images in both nonverbal and verbal conditions. Those with greater severity of comprehension deficits allocated greater PFD to nontarget singleton images in the verbal condition.

CONCLUSION: When using tasks that rely on multiple-choice displays and verbal stimuli, one cannot assume that verbal stimuli will override the effect of visual-stimulus characteristics.

Author List

Heuer S, Ivanova MV, Hallowell B

Author

Sabine Heuer PhD Assistant Professor in the Department of Communication Sciences and Disorders department at University of Wisconsin - Milwaukee

MESH terms used to index this publication - Major topics in bold

Adolescent
Adult
Aged
Aphasia
Attention
Comprehension
Female
Humans
Language Tests
Male
Middle Aged
Photic Stimulation
Speech Perception
Visual Perception
Young Adult