The currency of procurement cost

As the number of instrtumental responses required to procure access to food is increased, animals decrease the frequency of initiating meals and increase meal size, conserving total intake while limiting the increase in the overall cost of feeding. In two studies, one using wheel turns and one using bar presses as the instrumental response, we asked whether freely feeding laboratory rats measure cost according to the energy or the time they expend. In each study we varied both the price (i.e., number of wheel turns or bar presses) and the force required to make a response (i.e., torque on the wheel or weight of the bar). Price affected both procurement time (from the first to the last procurement response) and procurement work, whereas torque and bar weight affected work without altering time in most cases. Meal patterns were altered by all manipulations of price, but changes in torque and bar weight had little effect on meal patterns, except in the conditions in which they altered procurement time. These results suggest that time is a critical currency of procurement cost in rats.     

Interpretation bias and social anxiety: does interpretation bias mediate the relationship between trait social anxiety and state anxiety responses?

Two studies aimed to examine whether high socially anxious individuals are more likely to negatively interpret ambiguous social scenarios and facial expressions compared to low socially anxious individuals. We also examined whether interpretation bias serves as a mediator of the relationship between trait social anxiety and state anxiety responses, in particular current state anxiety, bodily sensations, and perceived probability and cost of negative evaluation pertaining to a speech task. Study 1 used ambiguous social scenarios and Study 2 used ambiguous facial expressions as stimuli to objectively assess interpretation bias. Undergraduate students with high and low social anxiety completed measures of state anxiety responses at three time points: baseline, after the interpretation bias task, and after the preparation for an impromptu speech. Results showed that high socially anxious individuals were more likely to endorse threat interpretations for ambiguous social scenarios and to interpret ambiguous faces as negative than low socially anxious individuals. Furthermore, negative interpretations mediated the relationship between trait social anxiety and perceived probability of negative evaluation pertaining to the speech task in Study 1 but not Study 2. The present studies provide new insight into the role of interpretation bias in social anxiety.     

Reward prospect interacts with trial-by-trial preparation for potential distraction

When attending for impending visual stimuli, cognitive systems prepare to identify relevant information while ignoring irrelevant, potentially distracting input. Recent work showed that a supramodal distracter-filtering mechanism is invoked in blocked designs involving expectation of possible distracter stimuli, although this entails a cost (distraction-filtering cost) on speeded performance when distracters are expected but not presented. Here we used an arrow-flanker task to study whether an analogous cost, potentially reflecting the recruitment of a specific distraction-filtering mechanism, occurs dynamically when potential distraction is cued trial-to-trial (cued distracter-expectation cost). In order to promote the maximal utilization of cue information by participants, in some experimental conditions the cue also signalled the possibility of earning a monetary reward for fast and accurate performance. This design also allowed us to investigate the interplay between anticipation for distracters and anticipation of reward, which is known to engender attentional preparation. Only in reward contexts did participants show a cued distracter-expectation cost, which was larger with higher reward prospect and when anticipation for both distracters and reward were manipulated trial-to-trial. Thus, these results indicate that reward prospect interacts with the distracter expectation during trial-by-trial preparatory processes for potential distraction. These findings highlight how reward guides cue-driven attentional preparation.     

Selective,but Only if It Is Free: Children Trust Inaccurate Individuals More when Alternative Sources Are Costly

The present research examines the effect of the costliness of an information source on children's selective learning. In three experiments (total N = 112), 4‐ to 7‐year‐olds were given the opportunity to acquire and endorse information from one of two sources. One source, a computer, was described as always accurate; the other source, a puppet, had a history of either accuracy or inaccuracy. For some children, learning from the computer required giving away stickers. The costliness of the computer clue reduced children's use of this source across all experiments, but its effect on children's use of the puppet varied based on the puppet's accuracy and the type of information learned. Children's trust in the puppet was above chance regardless of the cost of the computer when they were learning generalizable semantic information and the puppet had a history of accuracy. When the puppet was inaccurate or when children learned episodic information, the costliness of the computer significantly increased children's trust in the puppet. Hence, attaching a cost to a preferred knowledge source reduces children's selectivity and increases their trust in sources that they would not otherwise see as desirable. Copyright © 2013 John Wiley & Sons, Ltd.     

汉-英双语者图片命名任务中的语码切换代价

在图片命名范式下探讨了汉-英双语者汉、英两种语言之间的语码切换代价及影响切换代价不对称性的因素.实验一中发现了汉-英双语者的语码切换代价,但语码切换代价并未表现出不对称性;在加入时间间隔（ISI）变量后,短ISI条件下,汉-英双语者的语码切换代价表现出了不对称性,表现为从第二语言到第一语言的切换代价更大;而长ISI条件下,汉-英双语者的语码切换代价是对称的.这表明,图片命名任务中可出现语码切换代价,且ISI是影响语码切换代价不对称性的重要因素,支持并丰富了对优势语言的抑制说.     

Reformation Humanism: Reading the Classics in the New Theology

Scholarly discussions on what constitutes Christian humanism in the Renaissance and Reformation periods have typically concentrated on its manifestations before 1536, when Erasmus died. In this period, the old arguments for the reading of the Classics once set out by Basil and Augustine still predominated. Calvin’s teaching on the Fall and the noetic effects of sin, however, provided another basis for the incorporation of pagan thought into Christian learning. Christians who followed Calvin benefited from his precise and comprehensive theological position on the place of worldly knowledge in God’s original creation as a means for justifying their study of the Classics.     

Let It Go: Positive Affect Attenuates Sunk Cost Bias by Enhancing Cognitive Flexibility

Sunk cost bias is a pervasive problem in consumer decision making. It occurs when people continue to invest resources toward unsuccessful outcomes merely because they previously invested in them. This tendency exists because people devote too much attention to prior investments without considering how other factors may impact their decision outcome. While many suggested interventions to attenuate sunk cost bias involve altering cognitive processes, we examine an alternate affective route. Specifically, we propose that inducing positive affect attenuates sunk cost bias by naturally facilitating flexible thought processes. Across four studies, using hypothetical and real decision tasks, we find that positive affect induced in three different ways consistently attenuates sunk cost bias involving money, time, and effort investments. Further, we demonstrate that this occurs because people experiencing positive affect have enhanced cognitive flexibility. They consider more relevant decision factors and perceive sunk cost as having less of an influence on their decision outcomes. Then, in a fifth study, we show that a thought intervention promoting flexibility can attenuate consumers’ suboptimal commitment tendency in a field setting.     

主观社会阶层正向预测利他性惩罚

利他性惩罚是指个体自行承担成本来惩罚违规者的行为, 它受到社会阶层的影响。研究1利用2013年中国综合社会调查数据发现阶层显著正向预测利他性惩罚。研究2 (N = 450)基于真实生活事件的调查表明, 惩罚成本调节了阶层对惩罚的影响：在成本较高的直接惩罚中, 阶层正向预测惩罚; 而在成本较低的间接惩罚中, 这种作用不再显著。研究3 (N = 232)通过操纵阶层与成本进一步证实惩罚成本的调节作用：高阶层者比低阶层者更有可能做出利他性惩罚, 但两者的差距在高成本条件下更突出。研究4 (N = 125)综合考察了阶层影响惩罚的心理机制, 多层线性分析显示：惩罚成本较低时, 阶层通过公正世界信念来间接影响惩罚, 而成本较高时, 阶层直接正向影响了惩罚。上述结果意味着利他性惩罚受到个体社会阶层的影响, 同时也在一定程度上说明在利他性惩罚中基于成本-收益的策略性考虑并非完全缺席。