Effect of achievement motivation on cognitive control adaptations

Previous research addressing motivational effects on cognitive control adaptations primarily manipulated external rewards. In the present study, we examined whether achievement motivation, reflecting intrinsic motivation, modulates cognitive control adaptations. In each of two experiments, students were divided into a high achievement motivation group (HAM; Experiment 1: N?=?36; Experiment 2: N?=?39) and a low achievement motivation group (LAM; Experiment 1: N?=?30; Experiment 2: N?=?39) on the basis of the Achievement Motivation Scale. Cognitive control adaptations were assessed by sequential congruency effects (SCEs) in Flanker tasks. Using a standard Flanker task in Experiment 1 and examining response times, the HAM but not LAM participants showed evidence of cognitive control adaptations. Because SCEs in a standard Flanker task may reflect lower-level, bottom-up processes rather than cognitive control adaptations, we used an adapted version of the Flanker task in Experiment 2 that controlled for the potential influence of such processes. Experiment 2 again revealed evidence of SCEs in the HAM but not LAM participants. These results suggest that cognitive control adaptions may be modulated by achievement motivation. Such potential modulation could be taken into account when evaluating results of previous and future fundamental and applied studies on cognitive control adaptations.     

抑制炎症因素在他汀类药物心血管疾病多效性中的作用

他汀类药物自1976年上市应用于临床治疗以来,其非调脂作用,即他汀类药物的多效性近些年来越来越引起人们的重视,尤其是抑制炎症因素方面。随着近些年来研究的不断深入,越来越多的证据表明C反应蛋白作为体内最敏感的炎性标志物之一参与了多种临床常见心血管疾病的发生发展过程。而他汀类药物随着REVERSAL、PROVEIT、MIR...     

死亡提醒效应：概念、测量及来自多领域的证据

死亡提醒效应是指由于死亡提醒而引起的世界观防御或自尊寻求。对死亡提醒效应的测量主要考察死亡提醒后,被试在世界观防御或自尊寻求上的反应。死亡提醒效应在健康、消费、司法、政治及和平领域均有所体现,并对现实生活富有启示作用。未来研究应细化世界观的概念,并借鉴本土文化中的生死观。     

内隐学习策略的存在及其外显转化

该研究采用＂乘法算式答案正误判断的实验室任务＂,以＂奇偶检查策略＂为具体策略研究对象,探查内隐奇偶检查策略的存在及其自动性特征。实验结果表明：（1）奇偶检查策略可以以内隐方式存在,但经过不断练习可最终上升到意识层面;（2）奇偶检查策略的外显和内隐使用表现出各自独立的优势效应。外显学习策略的优势效应主要表现在正确算式判断任务中,而内隐学习策略则在错误算式判断任务中表现出＂内隐优势效应＂的趋势;（3）内隐奇偶检查策略的人为外显化并不能促使个体增加使用该策略的频率,也不能有效提高策略的执行效率。     

意识锚定加工对潜在锚定加工的影响

潜在锚定效应是指阈限下的启动锚定数字导致的锚定效应现象。本研究通过2个实验探讨了意识锚定加工对潜在锚定加工的影响。实验一考察了意识层面的外在锚对潜在锚定效应产生的影响,实验二则进一步探讨了意识层面的自发锚对潜在锚定效应的影响。实验一发现,在不存在外在锚时高锚与低锚的估计有显著性差异;实验二发现,在不存在自发锚时高锚与低锚的估计有显著性差异。研究结果表明,外在锚定加工和自发锚定加工的效应都强于潜在锚定加工。     

Effects of stimulus features and instruction on response coding,selection, and inhibition: Evidence from repetition effects under task switching

The coding of stimuli and responses is crucial for human behaviour. Here, we focused primarily on the response codes (or response categories). As a method, we applied a combined dual-task and task-switch paradigm with a fixed task-to-hand mapping. Usually, negative effects (i.e., costs) are observed for response category repetitions under task switching. However, in several previous studies it has been proposed that such repetition effects do not occur, if the stimulus categories (e.g., “odd” if digits have to be classified according to their parity feature) are unequivocally mapped to specific responses. Our aim was to test this hypothesis. In the present experiments, we were able to distinguish between three different types of possible response codes. The results show that the participants generally code their responses according to abstract response features (left/right, or index/middle finger). Moreover, the spatial codes were preferred over the finger-type codes even if the instructions stressed the latter. This preference, though, seemed to result from a stimulus–response feature overlap, so that the spatial response categories were primed by the respective stimulus features. If there was no such overlap, the instructions determined which type of response code was involved in response selection and inhibition.     

Minimizing the influence of recoding in the Implicit Association Test: The Recoding-Free Implicit Association Test (IAT-RF)

Recoding processes can influence the Implicit Association Test (IAT; Greenwald, McGhee, & Schwartz, 1998) in a way that impedes an unequivocal interpretation of the resulting compatibility effects. We present a modified version of the IAT that aims to eliminate recoding, the IAT-RF (short for “IAT–recoding free”). In the IAT-RF, compatible and incompatible assignments of categories to responses switch randomly between trials within a single experimental block. Abandoning an extended sequence of consistent category–response mappings undermines recoding processes in the IAT-RF. Two experiments reveal that the IAT-RF is capable of assessing compatibility effects between the nominally defined categories of the task and effectively prevents recoding. By enforcing a processing of the stimuli in terms of their task-relevant category membership, the IAT-RF eliminates the confounding of compatibility effects with task switch costs and becomes immune against biased selections of stimuli.     

Embodiment of motor skills when observing expert and novice athletes

If people are shown a dynamic movie of an action such as kicking a soccer ball or hitting a tennis ball, they will respond to it faster if it requires the same effector. This standard congruency effect was reported to reverse when participants viewed static images of famous athletes not actually performing an action. It was suggested that the congruent response was inhibited because of a social contrast effect, based on an implied action, whereby responders viewed themselves as comparatively worse than the professional athlete. The present study recorded hand and foot responses when identifying static images of both famous and novice athletes in soccer and tennis. The action was either explicit or implied. In Experiment 1, a standard congruency effect was found for all images. In Experiment 2, when a response was based on the identity of the athlete rather than their expertise, the standard congruency effect was enhanced for images of novice athletes, but was eliminated for experts, suggesting a social contrast effect. Our study is the first to show that embodiment effects can be seen for implied and explicit action images of both novices and experts, and that static images are capable of eliciting priming effects associated with sport-relevant effector pairings.     

Similar effects of visual perception and imagery on simple reaction time

A longstanding issue is whether perception and mental imagery share similar cognitive and neural mechanisms. To cast further light on this problem, we compared the effects of real and mentally generated visual stimuli on simple reaction time (RT). In five experiments, we tested the effects of difference in luminance, contrast, spatial frequency, motion, and orientation. With the intriguing exception of spatial frequency, in all other tasks perception and imagery showed qualitatively similar effects. An increase in luminance, contrast, and visual motion yielded a decrease in RT for both visually presented and imagined stimuli. In contrast, gratings of low spatial frequency were responded to more quickly than those of higher spatial frequency only for visually presented stimuli. Thus, the present study shows that basic dependent variables exert similar effects on visual RT either when retinally presented or when imagined. Of course, this evidence does not necessarily imply analogous mechanisms for perception and imagery, and a note of caution in such respect is suggested by the large difference in RT between the two operations. However, the present results undoubtedly provide support for some overlap between the structural representation of perception and imagery.     

Contextual constraint and N + 2 preview effects in reading

Extracting linguistic information from locations beyond the currently fixated word is a core component of skilled reading. Recent debate on this topic is focused on the question of whether useful linguistic information can be extracted from more than one (parafoveally visible) word to the right of a fixated word (N). The current study examined this issue through the use parafoveal previews with a short and high-frequency next (N?+?1) word, as this should increase the opportunity for the extraction of useful information from the subsequent (N?+?2) word. Pairs of N?+?2 words were selected so that contextual constraint was either high or low. Using saccade contingent display manipulations, preview of a N?+?2 target word during word N viewing consisted of either a visually dissimilar nonword or a word. The results revealed a substantial drop in fixation probability for word N?+?1 when the N?+?2 preview was masked with a nonword. Furthermore, the masking of word N?+?2 influenced its viewing duration even when word N?+?1 was fixated prior to word N?+?2 viewing. These results provide compelling evidence for the view that the linguistic processing can encompass more than one word at a time.