Doolan Katy J, Breslin Gavin, Hanna Donncha, Murphy Kate, Gallagher Alison M
Northern Ireland Centre for Food and Health, University of Ulster, Coleraine, Co. Londonderry, UK.
Obesity (Silver Spring). 2014 Dec;22(12):2501-7. doi: 10.1002/oby.20884. Epub 2014 Sep 8.
Based on the theory of incentive sensitization, the aim of this study was to investigate differences in attentional processing of food-related visual cues between normal-weight and overweight/obese males and females.
Twenty-six normal-weight (14M, 12F) and 26 overweight/obese (14M, 12F) adults completed a visual probe task and an eye-tracking paradigm. Reaction times and eye movements to food and control images were collected during both a fasted and fed condition in a counterbalanced design.
Participants had greater visual attention towards high-energy-density food images compared to low-energy-density food images regardless of hunger condition. This was most pronounced in overweight/obese males who had significantly greater maintained attention towards high-energy-density food images when compared with their normal-weight counterparts however no between weight group differences were observed for female participants.
High-energy-density food images appear to capture visual attention more readily than low-energy-density food images. Results also suggest the possibility of an altered visual food cue-associated reward system in overweight/obese males. Attentional processing of food cues may play a role in eating behaviors thus should be taken into consideration as part of an integrated approach to curbing obesity.
基于动机敏感化理论，本研究旨在调查正常体重与超重/肥胖男性和女性在与食物相关的视觉线索注意加工方面的差异。
26名正常体重成年人（14名男性，12名女性）和26名超重/肥胖成年人（14名男性，12名女性）完成了一项视觉探测任务和一个眼动追踪范式。在禁食和进食条件下，采用平衡设计收集对食物和对照图像的反应时间和眼动数据。
无论饥饿状态如何，与低能量密度食物图像相比，参与者对高能量密度食物图像有更高的视觉关注度。这在超重/肥胖男性中最为明显，与正常体重的男性相比，他们对高能量密度食物图像的持续关注度显著更高，然而女性参与者在体重组之间未观察到差异。
高能量密度食物图像似乎比低能量密度食物图像更容易吸引视觉注意。结果还表明超重/肥胖男性的视觉食物线索相关奖励系统可能发生了改变。食物线索的注意加工可能在饮食行为中起作用，因此应作为遏制肥胖综合方法的一部分加以考虑。
