Eat now,exercise later: The relation between consideration of immediate and future consequences and healthy behavior

In light of the current obesity epidemic, individual choices for food and exercise should be understood better. Consideration of the immediate and future consequences of these choices (i.e., time orientation) can be an important predictor of eating and exercising behavior. The objective was to show that behavior-specific time orientation differentially predicts eating and exercising behavior. Two studies were conducted among students (N = 55) and the general public (N = 165). Participants completed two adapted versions (for food and exercise) of the Consideration of Future Consequences Scale (CFC), each consisting of the subscales CFC-future and CFC-immediate. Thereafter they reported their eating and exercising behavior. Study 1 showed that CFC-food, but not CFC-exercise, predicted eating behavior. Similarly, both studies showed that CFC-exercise, but not CFC-food, predicted exercising behavior. Moreover, eating behavior was predicted by CFC-food/immediate, whereas exercising behavior was predicted by CFC-exercise/future. In conclusion, behavior-specific time orientation predicts behavior within a behavioral domain but less well across behavioral domains. Additionally, consideration of immediate and future consequences differentially predict behavior across behavioral domains. In order to predict behavior, time orientation is measured best at a behavior-specific level.     

镜像神经在药物心理渴求中的作用及机制

心理渴求是物质依赖者希望重新感受神经活性药物效应的渴望,其神经机制的早期影像研究,主要集中在前额皮质和奖赏中枢.镜像神经是新近发现的位于动作脑区,能理解、分析所观察动作的目的和性质,并通过内隐模拟,产生直接映射式的情绪和认知的神经.最新的研究发现尼古丁成瘾者在相关线索的刺激下,其镜像神经也能被激活.本研究旨在探索镜像神经参与相关线索下心理渴求形成的机制,为发展更可靠的依赖行为的生物学标记提供另一个重要目标,帮助人们更好地理解药物渴求形成的神经生物学基础与过程.     

正念禅修与成瘾行为

在矫正成瘾行为的研究中,正念禅修作为一种更为有益的尝试,受到研究者们日益广泛的关注。正念禅修指个体自觉地将注意力集中于体验其思想、情绪和身体感觉上,并以觉察、接纳和非批判的态度关注于当下体验的训练方式。目前,研究者主要就正念禅修在成瘾行为矫正中的积极作用、渴望与压力在其中所扮演的作用以及从神经机制三方面对其进行阐述,由于当前的研究大多是初步性的,未来可从研究方法学、解释机制和应用研究等方面展开进一步的探究。     

Breaking bread: spirituality,food and early childhood education

The spiritual aspect of early childhood education is supported by the early childhood curriculum in Aotearoa New Zealand, Te Whāriki. Research in three different early childhood settings presents new perspectives on the everyday experiences of children in terms of spirituality. Each setting formed a case study that included the voices of children, parents and teachers. Focusing on the practices that surround food and eating, this narrative account takes the sharing of food as a starting point for analysing the spiritual experiences of young children and the metaphor of ‘breaking bread’ is used. It is proposed that the concept of everyday spirituality informs the practice of teachers in each context and working with young children involves considering issues of equity, culture and well‐being.     

The addition of saccharin to taste cues affects taste preference conditioning in thirsty rats

Previous failures to condition preferences for the unacceptable taste cues sucrose octaacetate (SOA) and citric acid (CA) using a reverse-order, differential conditioning procedure (Forestell & LoLordo, 2000) may have been the result of low consumption of the taste cues in training or of their relatively low acceptability to rats that are thirsty and hungry. In the present study, rats that were thirsty but not hungry readily consumed the SOA and CA conditioned stimulus solutions in training. In test, stronger preferences were displayed for CS+ if the taste cues had been mixed in water (i.e., for the previously unacceptable taste cues) than if they had been made more acceptable by the addition of saccharin in training and test. In Experiment 2, again with rats that were thirsty but not hungry, stronger preferences for CS+ were observed when taste cues were presented in water in the test than when they were presented in saccharin. Addition of saccharin to the taste cues in test eliminated the preference for CS+.     

大学新生网络使用时间与网络成瘾的关系：有中介的调节模型

通过整群取样的方法选取北京市某所高校2250名大一新生为测查对象, 采用问卷方式探讨了大学新生网络使用时间、网络社交使用占网络使用总时间的比重、网络使用的背景性渴求以及网络成瘾程度之间的关系。基于网络使用满足的相关理论以及渴求的条件反射理论, 本研究构建了一个有中介的调节模型, 即网络社交使用比重在网络使用时间与网络成瘾之间起调节作用, 而且这一调节作用通过网络使用的背景性渴求这一中介变量得以实现。结果显示：(1)大学新生每周上网时间为13.58 ± 8.94小时, 网络社交使用占全部上网时间的比重为27.18 ± 18.15%; (2)网络使用时间、网络社交使用比重、网络使用背景性渴求与网络成瘾的五个维度及总分呈显著正相关; (3)网络使用时间以及网络社交使用比重均能够直接正向预测网络成瘾, 同时网络社交比重在网络使用时间预测网络成瘾这一关系中起调节作用, 即相比较少使用网络社交的被试, 较多使用网络社交的群体表现出更高的网络成瘾程度, 且网络使用时间对网络成瘾程度的预测作用相对较低; 而且网络社交比重的调节作用部分通过网络使用的背景性渴求这一中介变量实现。     

经颅直流电刺激技术在物质依赖治疗中的应用

物质依赖是一种慢性、复发性脑部疾病, 给个体及社会带来极大损害。研究发现, 经颅直流电刺激(transcranial direct current stimulation, tDCS)可以通过调节背外侧前额叶(dorsolateral prefrontal cortex, DLPFC)脑区的兴奋性降低物质依赖者的渴求, 并改善受损的认知功能。tDCS具有副作用小、操作简便、费用低廉等优点, 因此在物质依赖治疗领域应用前景广泛。未来应考虑确定最佳的刺激参数及刺激位置, 同时考虑物质依赖者的种类及个体差异, 与其他疗法结合使用, 并进一步深入探索tDCS治疗物质依赖的神经机制。     

背景性渴求与事件性渴求:区分心理渴求对尼古丁成瘾的不同作用路径

大量研究发现心理渴求机制的紊乱是尼古丁成瘾的核心机制之一。线索暴露是探索心理渴求与尼古丁成瘾关系的重要研究范式。但最近研究者提出该范式较难区分事件性渴求与背景性渴求,导致无法清楚定位渴求在尼古丁成瘾中扮演的角色。通过对以往文献的回顾,对不同成瘾概念、作用机制和生理基础进行对比分析,认为事件性渴求与背景性渴求两者在维持成瘾行为上的确存在不同的作用路径。未来研究应改进实验范式,分别探讨两种心理渴求与尼古丁成瘾的内在联系,完善心理渴求与尼古丁成瘾的关系模型,为尼古丁成瘾的治疗和干预等方法提供一定的理论依据。     

Is your choice my choice? The owners’ effect on pet dogs’ (Canis lupus familiaris) performance in a food choice task

This study investigates the influence of owners on their dogs’ performance in a food choice task using either different or equal quantities of food. Fifty-four pet dogs were tested in three different conditions. In Condition 1 we evaluated their ability to choose between a large and small amount of food (quantity discrimination task). In Condition 2 dogs were again presented with a choice between the large and small food quantity, but only after having witnessed their owner favouring the small quantity. In Condition 3 dogs were given a choice between two equally small quantities of food having witnessed their owner favouring either one or the other. A strong effect of the owner on the dogs’ performance was observed. In Condition 1 dogs as a group chose significantly more often the large food quantity, thus showing their ability to solve the quantity discrimination task. After observing their owner expressing a preference for the small food quantity they chose the large quantity of food significantly less than in the independent choice situation. The tendency to conform to the owner’s choice was higher when the dogs had to choose between equally small quantities of food (Condition 3) rather than between a large and a small one (Condition 2). These results provide evidence that dogs can be influenced by their owners even when their indications are clearly in contrast with direct perceptual information, thus leading dogs to ultimately make counterproductive choices.     

Foraging and associative learning of visual signals in a parasitic wasp

To cope with environmental variability, animals should gather and use information to reduce uncertainty. In insect parasitoids, associative learning has been widely documented in the context of host foraging. However, despite its potential adaptive value, the insect food searching strategy and cues used to search are poorly understood. In this study, we examined the ability of hymenopteran Venturia canescens females to associate food to a visual cue. To broaden the scope of our results, experiments were performed with both arrhenotokous (sexual) and thelytokous (asexual) individuals. The wasps showed innate attraction for yellow and orange stimuli when presented versus blue stimuli. When trained to associate a food reward with one of the attractive colours (orange), they significantly moved from a distance towards the colour previously associated with food. The choice of the innately preferred colour (yellow) was not modified by associative learning. In the context of food foraging, this study is the first to show associative learning using visual stimuli in a parasitoid and active choice of this colour. This ability gives new insights concerning potential food sources for V. canescens in the field, since flowers are sugar sources, which emit colour signals.