Early Shift of Attention Is Not Regulated by Mind Wandering in Visual Search

Frontiers in Neuroscience

Christoph Reichert¹  Lena Vogelgesang²  Stefan Dürschmid³  Hermann Hinrichs⁵  Hans-Jochen Heinze⁵ 

[1] CBBS – Center of Behavioral Brain Sciences, Otto-von-Guericke University, Magdeburg, Germany;Department of Behavioral Neurology, Leibniz Institute for Neurobiology, Magdeburg, Germany;Department of Neurology, Otto-von-Guericke University, Magdeburg, Germany;Forschungscampus STIMULATE, Otto-von-Guericke University, Magdeburg, Germany;German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany;

关键词: mind wandering;    attentional decoupling;    eye tracking;    top–down;    early attention;   

DOI  :  10.3389/fnins.2020.552637

来源: DOAJ

【 摘 要 】

Unique to humans is the ability to report subjective awareness of a broad repertoire of external and internal events. Even when asked to focus on external information, the human’s mind repeatedly wanders to task-unrelated thoughts, which limits reading comprehension or the ability to withhold automated manual responses. This led to the attentional decoupling account of mind wandering (MW). However, manual responses are not an ideal parameter to study attentional decoupling, given that during MW, the online adjustment of manual motor responses is impaired. Hence, whether early attentional mechanisms are indeed downregulated during MW or only motor responses being slowed is not clear. In contrast to manual motor responses, eye movements are considered a sensitive proxy of attentional shifts. Using a simple target detection task, we asked subjects to indicate whether a target was presented within a visual search display by pressing a button while we recorded eye movements and unpredictably asked the subjects to rate their actual level of MW. Generally, manual reaction times increased with MW, both in target absent and present trials. But importantly, even in trials with MW, subjects detected earlier a presented than an absent target. The decoupling account would predict more fixations of the target before pressing the button during MW. However, our results did not corroborate this assumption. Most importantly, subject’s time to direct gaze at the target was equally fast in trials with and without MW. Our results corroborate our hypothesis that during MW early, bottom–up driven attentional processes are not decoupled but selectively manual motor responses are slowed.

【 授权许可】

Unknown