Cyclical variation in digit-span and visual-search performance in women differing in the severity of their premenstrual symptoms.

Groups of women differing in the severity of reported premenstrual symptoms were compared over two menstrual cycles on a digit-span task, a visual-search task, and a combination of the two. Neither group exhibited large performance changes during the premenstrual phase of the cycle. High-symptom women differed somewhat from low-symptom women in the effect of menstrual phase on digit-span performance, recalling slightly fewer series correctly during the premenstrual phase. The response latency of high-symptom women on the visual-search task was substantially longer than that of the low-symptom women regardless of menstrual phase. These results suggest that there may be stable differences between high-symptom and low-symptom subjects that are greater than the cyclical fluctuation within either group.     

Tuning down the hedonic brain: Cognitive load reduces neural responses to high-calorie food pictures in the nucleus accumbens

The present research examined whether cognitive load modulates the neural processing of appetitive, high-calorie food stimuli. In a functional magnetic resonance imaging (fMRI) study, participants quickly categorized high-calorie and low-calorie food pictures versus object pictures as edible or inedible while they concurrently performed a digit-span task that varied between low and high cognitive load (memorizing six digits vs. one digit). In line with predictions, the digit-span task engaged the dorsolateral prefrontal cortex (DLPFC) when cognitive load was high compared to low. Moreover, exposure to high-calorie compared to low-calorie food pictures led to increased activation in the nucleus accumbens (NAcc), but only when cognitive load was low and not when it was high. In addition, connectivity analyses showed that load altered the functional coupling between NAcc and right DLPFC during presentation of the high-calorie versus low-calorie food pictures. Together, these findings indicate that loading the cognitive system moderates hedonic brain responses to high-calorie food pictures via interactions between NAcc and DLPFC. Our findings are consistent with the putative cognitive nature of food motivation. Implications for future research are discussed.     

Phonological memory in bilinguals and monolinguals

In the present study, we examined the effects of lexical-semantic knowledge and of difficulty level on phonological memory performance by monolingual adult English speakers and bilingual adult Korean?CEnglish speakers. The monolingual English speakers were more proficient in English than the bilingual speakers. All participants were tested on a range of phonological memory tasks in English. We manipulated the degree to which the phonological memory tasks involved lexical-semantic knowledge of English (word-span task, digit-span task, and nonword repetition task), as well as the difficulty level of the tasks. Results revealed that on the word-span task (highest level of lexical-semantic knowledge), monolinguals outperformed bilinguals at the easier levels of the task but bilinguals outperformed monolinguals at the more difficult levels of the task. For the digit-span and nonword repetition tasks, monolinguals outperformed bilinguals at the easier levels of the tasks, but the differences between the two groups vanished with the increase in the difficulty levels. Together, these results suggest that proficiency-based differences between monolingual and bilingual phonological memory performance depend on the degree to which the tasks rely on lexical-semantic knowledge and the difficulty level of the task.     

Voice and cooperative behavior as contrasting forms of contextual performance: evidence of differential relationships with big five personality characteristics and cognitive ability

The results of a laboratory study of 276 individuals replicate past findings for cooperative behavior as a form of contextual performance and extend past research by providing evidence that voice (constructive change-oriented communication) may be another form of contextual performance. Conscientiousness, extraversion, and agreeableness related more strongly to voice behavior and cooperative behavior than to task performance. Cognitive ability related more strongly to task performance than to voice behavior or cooperative behavior. Results also demonstrate contrasting relationships for agreeableness (positive with cooperative behavior and negative with voice behavior). This supports recent research suggesting the possibility of bidirectional relationships with personality characteristics across different dimensions of job performance.     

Effects of modality preferences on learning and recall of bisensory stimuli

The performance of visual attenders and aural attenders, as defined by performance on a bisensory digit-span task, was compared on three bisensory tasks. First, in replication of an earlier study, performance was compared on a bisensory missing-unit paradigm, in which S was required to respond with missing units from two independent sets of stimuli, each set being presented on a separate channel. The results corroborated those of an earlier study in which an interaction between modality preferences and presentation modality was found. Further, differential recall patterns were found for each of the groups. While such comparable results were not found on the other two tasks, differential performance on a bisensory paired-associate task and a bisensory connected discourse task were found. The results are interpreted in accord with Murdock’s (1967) hypotheses concerning separate sensory storage mechanisms.     

Individual differences in digit span and chunking

The present experiment examined the relation between digit span and chunking in adults. Chunking was estimated from performance in a serial anticipation task that included run patterns and patterns discovered in conventionally constructed digit-span sequences. Chunking was indexed by the location of errors made on experimenter-defined chunks and by a measure that makes no assumptions about the location of chunk boundaries. Both measures revealed large individual differences in chunking; however, correlations between these differences and span tended to be weak and nonsignificant. Thus, the results provided no evidence that higher digit spans are due to more active chunking processes.     

Short-term memory in autism spectrum disorder

Three experiments examined verbal short-term memory in comparison and autism spectrum disorder (ASD) participants. Experiment 1 involved forward and backward digit recall. Experiment 2 used a standard immediate serial recall task where, contrary to the digit-span task, items (words) were not repeated from list to list. Hence, this task called more heavily on item memory. Experiment 3 tested short-term order memory with an order recognition test: Each word list was repeated with or without the position of 2 adjacent items swapped. The ASD group showed poorer performance in all 3 experiments. Experiments 1 and 2 showed that group differences were due to memory for the order of the items, not to memory for the items themselves. Confirming these findings, the results of Experiment 3 showed that the ASD group had more difficulty detecting a change in the temporal sequence of the items.     

抑制性建言：影响因素与实施效果

抑制性建言(Prohibitive Voice)是近年来建言行为领域的一个新兴话题,其强调的是对防危问题的关注而不是工作创新改进,是组织健康的一种重要保障。研究者主要从抑制性建言的概念、测量及实证研究等方面,对国内外研究进行系统性的评述及梳理。未来研究应注意从个体情境互动视角探究抑制性建言的诱因、双刃剑效应视角识别抑制性建言的实施效果和对抑制性建言的中国本土化权变作用等方面继续努力完善。     

Children's working-memory processes: a response-timing analysis

Recall response durations were used to clarify processing in working-memory tasks. Experiment 1 examined children's performance in reading span, a task in which sentences were processed and the final word of each sentence was retained for subsequent recall. Experiment 2 examined the development of listening-, counting-, and digit-span task performance. Responses were much longer in the reading-and listening-span tasks than in the other span tasks, suggesting that participants in sentence-based span tasks take time to retrieve the semantic or linguistic structure as cues to recall of the sentence-final words. Response durations in working-memory tasks helped to predict academic skill and achievement, largely separate from the contributions of the memory spans themselves. Response durations thus are important in the interpretation of span task performance.     

Personality as a predictor of the value of voice

The opportunity for workers to provide input, also known as voice, has received extensive study. The contrasting relational and instrumental theories of voice have stimulated research investigating why people value voice. However, researchers have yet to assess individual differences in the actual value that people place on voice. This consideration is particularly important because the effect of voice on perceived procedural fairness varies according to the value of voice. This laboratory study is an examination of the Big Five (extraversion, agreeableness, openness to experience, neuroticism, and conscientiousness; L. Goldberg, 1992) and core self-evaluations (neuroticism, self-esteem, self-efficacy, and locus of control; T. Judge, E. Locke, & C. Durham, 1997) as predictors of the value of voice for 96 undergraduates. Although both the Big Five and core self-evaluations accounted for significant variance in the value of voice, only 2 individual components (extraversion and self-efficacy) significantly predicted the value of voice.     

Neural processing of vocal emotion and identity

The voice is a marker of a person's identity which allows individual recognition even if the person is not in sight. Listening to a voice also affords inferences about the speaker's emotional state. Both these types of personal information are encoded in characteristic acoustic feature patterns analyzed within the auditory cortex. In the present study 16 volunteers listened to pairs of non-verbal voice stimuli with happy or sad valence in two different task conditions while event-related brain potentials (ERPs) were recorded. In an emotion matching task, participants indicated whether the expressed emotion of a target voice was congruent or incongruent with that of a (preceding) prime voice. In an identity matching task, participants indicated whether or not the prime and target voice belonged to the same person. Effects based on emotion expressed occurred earlier than those based on voice identity. Specifically, P2 (approximately 200 ms)-amplitudes were reduced for happy voices when primed by happy voices. Identity match effects, by contrast, did not start until around 300 ms. These results show an early task-specific emotion-based influence on the early stages of auditory sensory processing.     

抑制性建言：影响因素与实施效果

抑制性建言(Prohibitive Voice)是近年来建言行为领域的一个新兴话题,其强调的是对防危问题的关注而不是工作创新改进,是组织健康的一种重要保障。研究者主要从抑制性建言的概念、测量及实证研究等方面,对国内外研究进行系统性的评述及梳理。未来研究应注意从个体情境互动视角探究抑制性建言的诱因、双刃剑效应视角识别抑制性建言的实施效果和对抑制性建言的中国本土化权变作用等方面继续努力完善。     

Concept of uprightness in baboons: assessment with pictures of realistic scenes

How nonhuman primates process pictures of natural scenes or objects remains a matter of debates. This issue was addressed in the current research by questioning the processing of the canonical orientation of pictures in baboons. Two adult guinea baboons were trained to use an interactive key (IK) on a touch-screen to change the orientation of target pictures showing humans or quadruped mammals until upright. In experiment 1, both baboons successfully learned to use the IK when that key induced a 90 degrees rightward rotation of the picture, but post-training transfer of performance did not occur to novel pictures of natural scenes due to potential motor biases. In Experiment 2, a touch on IK randomly displayed the pictures in any of the four cardinal orientations. Baboons successfully learned the task, but transfer to novel pictures could only be demonstrated after they had been exposed to 360-480 pictures in that condition. Experiment 3 confirmed positive transfers to novel pictures, and showed that both the figure and background information controlled the behavior. Our research on baboons therefore demonstrates the development and use of an "upright" concept, and indicates that picture processing modes strongly depend on the subject's past experience with naturalistic pictorial stimuli.     

Typicality effects on memory for voice: Implications for earwitness testimony

The effects of voice typicality on voice recognition were examined. In an incidental task, participants were presented with consonant‐vowel‐consonant stimuli (with varying vowels) spoken by voices rated as high‐typical or low‐typical. One week later, they were brought back for a surprise voice recognition test where the target voice was presented along with low‐typical and high‐typical voice distracters. The results indicated that voice misidentifications occur, with many errors due to confusions of high‐typical voice targets with high‐typical target voices. The results show that voice typicality affects voice recognition accuracy and is an important factor to be considered in real‐life earwitness testimony situations. Copyright © 2009 John Wiley & Sons, Ltd.     

IMPROVING THE GENERALIZED MNEMONIC PERFORMANCE OF A DOWN'S SYNDROME CHILD1

A training program was conducted to improve the generalized mnemonic performance, or memory, of a Down's Syndrome child. Training was directed at digit-span performance with generalization from training determined by responses to untrained mnemonic performance probes. The digit-span items varied in length from three to five digits. Each length constituted an item class, with each class trained within the framework of a multiple-baseline design. Probes consisted of untrained digit-span items, grammatical sentences, nongrammatical sentences, and match-to-sample items. A training procedure, in which 15 items from each class varied continually from trial to trial and from day to day, resulted in the percentage of correct responses to both training and probe items increasing to levels substantially above baseline. The results demonstrate the effectiveness of the training procedure in improving the generalized mnemonic performance of a Down's Syndrome child.     

The voice of self-control: Blocking the inner voice increases impulsive responding

Philosophers and psychologists have long-debated the notion that the voice in our heads might help us to control our actions. Evidence from a number of lines of research suggests that verbal resources help us to focus attention, providing reason to believe that the inner voice might aid self-control via this capacity. In this study we explored the link between verbal resources and self-control by occupying the inner voice and then assessing behavioral indices of self-control. Participants completed regular and switching versions of the Go/No-Go task while doing verbal or spatial secondary tasks. Compared with the spatial task, doing the verbal task resulted in more impulsive responding, as indicated by a greater tendency to make a ‘Go’ response, a pattern that was accentuated in the switching version of the Go/No-Go. Our results suggest that the inner voice helps us to exert self-control by enhancing our ability to restrain our impulses.     

从征求到反应：建言行为链中的管理者角色

在建言行为发生链中,管理者扮演着征求者和反应者的不同角色。在管理实践中,管理者却罕于从员工处征求建言,或未能对员工建言做出有效反应。在学术界,目前有关管理者征求建言、纳谏和建言/建言者评估的研究日益丰富,但不成系统。为解决这些实践和理论上的不足,提出并整合建言行为链框架;并基于输入-过程-输出模型,从管理者角色入手,系统分析和归纳管理者征求建言、采纳建言、评估建言(者)的前提和结果,以诠释管理者在员工建言行为链中发挥的作用及其机制,并为管理者更好履行建言管理职能提供实践参考。     

When causality does not imply correlation: more spadework at the foundations of scientific psychology

Experimental research in psychology is based on an open-loop causal model which assumes that sensory input causes behavioral output. This model was tested in a tracking experiment where participants were asked to control a cursor, keeping it aligned with a target by moving a mouse to compensate for disturbances of differing difficulty. Since cursor movements (inputs) are the only observable cause of mouse movements (outputs), the open-loop model predicts that there will be a correlation between input and output that increases as tracking performance improves. In fact, the correlation between sensory input and motor output is very low regardless of the quality of tracking performance; causality, in terms of the effect of input on output, does not seem to imply correlation in this situation. This surprising result can be explained by a closed-loop model which assumes that input is causing output while output is causing input.     

A computer touch-screen apparatus for training visual discriminations in rats.

We describe an operant conditioning apparatus that uses computerized touch-screen technology and is designed for the versatile and highly controlled testing of rats in a potentially wide variety of behavioral paradigms. Although computer-controlled touch-screen systems have been developed for use with pigeons, monkeys, and humans, analogous technologies and methods have not yet been developed for rats. The development of a touch-screen system for rats could enhance the efficiency of behavioral research with rats, and may offer a unique tool for studying animal learning. In the first test of the utility of the apparatus, 3 Sprague-Dawley rats learned to activate the touch screen only after the touch-screen panel was made slightly movable. These animals then learned to discriminate visual stimuli presented on the computer monitor, but only after the food magazine and pellet dispenser were moved to the rear of the chamber opposite the stimulus display and response window. In a test of the utility of the modified apparatus, 6 Long-Evans rats learned to activate the touch screen and learned one of three different simple discriminations using computer-generated, visually presented stimuli. A basic method for training rats to activate the computer touch screen and for visual discrimination training is described. Results show that rats learned to activate the touch screen and discriminate visual stimuli presented on a computer monitor. Potential applications and advantages of the touch-screen-equipped rat operant conditioning chamber are discussed.     

The consistency rule and the voice effect: the influence of expectations on procedural fairness judgements and performance

In procedural justice research it has frequently been found that allowing people an opportunity to voice their opinion enhances their judgements of the fairness of a decision-making procedure. The present study investigated how this voice effect is affected by the consistency over time rule, which dictates that, once people expect a certain procedure, deviation from the expected procedure will lead to a reduction in procedural fairness. Two experiments were conducted. In both experiments the independent variables manipulated were whether subjects were explicitly told to expect a voice procedure, were explicitly told to expect a no-voice procedure, or were told nothing about a subsequent procedure, and whether or not subjects subsequently received an opportunity to voice their opinion. The manipulations were induced by means of scenarios in Experiment 1, and by means of the Lind, Kanfer and Early (1990) paradigm in Experiment 2. In both experiments it was found that subjects who expected a voice procedure or who expected nothing judged receiving the voice procedure as more fair than receiving the no-voice procedure, but that subjects who expected a no-voice procedure judged receiving the voice procedure (inconsistency) as less fair than receiving the no-voice procedure (consistency). Furthermore, effects of the manipulated variables on subjects' task performance were found in Experiment 2.