Worth a quick look? Initial scene previews can guide eye movements as a function of domain-specific expertise but can also have unforeseen costs

Litchfield, Damien and Donovan, Tim (2016) Worth a quick look? Initial scene previews can guide eye movements as a function of domain-specific expertise but can also have unforeseen costs. Journal of Experimental Psychology: Human Perception and Performance, 42 (7). pp. 982-994.

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Official URL: https://doi.org/10.1037/xhp0000202

Abstract

Rapid scene recognition is a global visual process we can all exploit to guide search. This ability is thought to underpin expertise in medical image perception yet there is no direct evidence that isolates the expertise-specific contribution of processing scene previews on subsequent eye movement performance. We used the flash-preview moving window paradigm (Castelhano & Henderson, 2007) to investigate this issue. Expert radiologists and novice observers underwent 2 experiments whereby participants either saw a 250ms scene preview or a mask before searching for a target. Observers looked for everyday objects from real-world scenes (Experiment 1), and searched for lung nodules from medical images (Experiment 2). Both expertise groups exploited the brief preview of the upcoming scene to more efficiently guide windowed search in Experiment 1, but there was only a weak effect of domain-specific expertise in Experiment 2, with experts showing small improvements in search metrics with scene previews. Expert diagnostic performance was better than novices in all conditions but was not contingent on seeing the scene preview, and scene preview actually impaired novice diagnostic performance. Experiment 3 required novice and experienced observers to search for a variety abnormalities from different medical images. Rather than maximising the expertise-specific advantage of processing scene previews, both novices and experienced radiographers were worse at detecting abnormalities with scene previews. We discuss how restricting access to the initial glimpse can be compensated for by subsequent search and discovery processing, but there can still be costs in integrating a fleeting glimpse of a medical scene.

Item Type: Article
Journal or Publication Title: Journal of Experimental Psychology: Human Perception and Performance
Publisher: American Psychological Association
ISSN: 1939-1277
Related URL(s):
Departments: Faculty of Health and Science > Medical and Sports Sciences > Health and Medical Sciences
Additional Information: This article may not exactly replicate the final version published in the APA journal. It is not the copy of record.
Depositing User: Tim Donovan
Date Deposited: 10 Dec 2015 14:57
Last Modified: 17 Mar 2017 17:02
URI: http://insight.cumbria.ac.uk/id/eprint/1941

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