|
Rapid adaptation of the distribution of fixations during natural reading with central field loss and its role in reading performance: a mediation analysis| old_uid | 17061 |
|---|
| title | Rapid adaptation of the distribution of fixations during natural reading with central field loss and its role in reading performance: a mediation analysis |
|---|
| start_date | 2019/01/28 |
|---|
| schedule | 14h |
|---|
| online | no |
|---|
| summary | More than one million persons (mostly Age-related Macular Degeneration patients) are blind in their central visual field and have thus great difficulty to read text. Reading with a central field loss (CFL) relies on eccentric vision and requires adaptation of visuo-attentional and oculo-motor processes. Whether using a Preferred Retinal Locus (PRL) during CFL reading can improve reading performance is still an open issue. To address this question, normally-sighted subjects read French sentences with a gaze-contingent artificial scotoma (10°) : they had to read text with a technique allowing to display only one word at a time. For each subject, a fixation map was created by plotting fixation locations with respect to each word's center. Reading speed of subjects was regressed on several characteristics of their fixation map. Results notably show that reading speed correlates with an upward displacement of fixation maps. More importantly, a mediation analysis shows that improvement in reading speed across a period of about 2 hours is mediated by this upward displacement. I will also take this opportunity to emphasize the interest of mediation analysis for experimental psychology especially when investigating adaptive processes. Finally, I will discuss how our results constrain current theories of the link between PRL and CFL reading. |
|---|
| responsibles | Senot |
|---|
| |
|