Caffeine Promotes Global Spatial Processing in Habitual and Non-Habitual Caffeine Consumers
Caffeine Promotes Global Spatial Processing in Habitual and Non-Habitual Caffeine Consumers
复制标题
咖啡因促进习惯性和非习惯性咖啡因消费者的全局空间处理
DOI：
--
复制
发表时间：
2013
影响因子：
2.9
通讯作者：
R. Kanarek
中科院分区：
文献类型：
--
作者：
Grace E Giles;Caroline R. Mahoney;Tad T. Brunyé;H. Taylor;R. Kanarek
信息处理通常偏向全局线索，往往以牺牲局部信息为代价。现有的模棱两可的数据表明，唤醒状态可能会加剧局部或全局处理偏差，至少部分取决于操纵、任务和刺激的性质。为了进一步区分导致这种模棱两可结果的条件，我们改变咖啡因剂量来改变生理唤醒状态，并测量它们对需要检索局部与全局空间知识的任务的影响。在双盲、重复测量设计中，非习惯性（实验 1；N = 36，M = 42.5 ± 28.7 毫克/天咖啡因）和习惯性（实验 2；N = 34， M = 579.5 ± 311.5 毫克/天咖啡因）咖啡因消费者完成了四次测试，分别对应四种咖啡因剂量（0、100、200、400 毫克）。在每次测试期间，参与者服用一粒含有三种剂量咖啡因或安慰剂之一的胶囊，等待 60 分钟，然后完成两项空间任务，一项涉及记忆地图，一项涉及空间描述。空间陈述验证任务通过差异性地探测近端与远端地标关系的记忆来测试局部与全局空间知识。在地图学习任务中，结果表明，与近端（即局部）相比，在非习惯性消费者中，咖啡因在 100（边缘）、200 和 400mg 咖啡因的情况下增强了远端（即全局）的记忆，在习惯性消费者中，咖啡因从 200mg 咖啡因开始略有增强。在空间描述任务中，对于非习惯性而非习惯性消费者来说，从 100 毫克开始，咖啡因增强了远端记忆，而近端记忆则不然。因此，我们提供的证据表明，咖啡因引起的生理唤醒会放大全局空间处理偏差，而这些影响至少部分是由习惯性咖啡因消费驱动的。
Information processing is generally biased toward global cues, often at the expense of local information. Equivocal extant data suggests that arousal states may accentuate either a local or global processing bias, at least partially dependent on the nature of the manipulation, task, and stimuli. To further differentiate the conditions responsible for such equivocal results we varied caffeine doses to alter physiological arousal states and measured their effect on tasks requiring the retrieval of local versus global spatial knowledge. In a double-blind, repeated-measures design, non-habitual (Experiment 1; N = 36, M = 42.5 ± 28.7 mg/day caffeine) and habitual (Experiment 2; N = 34, M = 579.5 ± 311.5 mg/day caffeine) caffeine consumers completed four test sessions corresponding to each of four caffeine doses (0, 100, 200, 400 mg). During each test session, participants consumed a capsule containing one of the three doses of caffeine or placebo, waited 60 min, and then completed two spatial tasks, one involving memorizing maps and one spatial descriptions. A spatial statement verification task tested local versus global spatial knowledge by differentially probing memory for proximal versus distal landmark relationships. On the map learning task, results indicated that caffeine enhanced memory for distal (i.e., global) compared to proximal (i.e., local) comparisons at 100 (marginal), 200, and 400 mg caffeine in non-habitual consumers, and marginally beginning at 200 mg caffeine in habitual consumers. On the spatial descriptions task, caffeine enhanced memory for distal compared to proximal comparisons beginning at 100 mg in non-habitual but not habitual consumers. We thus provide evidence that caffeine-induced physiological arousal amplifies global spatial processing biases, and these effects are at least partially driven by habitual caffeine consumption.
影响因子：
3.7
作者：
LANG, PJ;GREENWALD, MK;HAMM, AO
通讯作者：
HAMM, AO
影响因子：
4
作者：
Ferre, Sergi
通讯作者：
Ferre, Sergi