Dopamine regulation of human speech and bird song: a critical review

To understand the neural basis of human speech control, extensive research has been done using a variety of methodologies in a range of experimental models. Nevertheless, several critical questions about learned vocal motor control still remain open. One of them is the mechanism(s) by which neurotransmitters, such as dopamine, modulate speech and song production. In this review, we bring together the two fields of investigations of dopamine action on voice control in humans and songbirds, who share similar behavioral and neural mechanisms for speech and song production. While human studies investigating the role of dopamine in speech control are limited to reports in neurological patients, research on dopaminergic modulation of bird song control has recently expanded our views on how this system might be organized. We discuss the parallels between bird song and human speech from the perspective of dopaminergic control as well as outline important differences between these species.     

Two-step communication for the interaction between automated vehicles and pedestrians

An important challenge of automated vehicles (AV) will be the cooperative interaction with surrounding road users such as pedestrians. One solution to compensate for the missing driver-pedestrian interaction might be explicit communication via external human machine interfaces (eHMIs). Additionally, implicit communication such as a vehicle pitch motion might support AVs when interacting with pedestrians. While previous work explored various explicit and implicit communication cues, these concepts communicated the intention of the AV at one single time point. Currently, empirical findings on two-step communication lack so far. In this study, we empirically test the effect of a two-step AV communication that uses an implicit cue at a long distance and subsequently provides an implicit or explicit cues at a short distance. We compared its efficiency to single-step communication concepts providing implicit or explicit cues at the shorter distance only. To explore whether the right communication cue is used at the right distance, we analyzed pedestrians’ fixations while approaching an AV using an eye tracking device.We conducted a virtual reality study (N = 30) with AV communication concept that provided an active pitch motion or an eHMI and compared them with a two-step AV communication concept that provided an additional active pitch motion at a long distance when approaching the pedestrian. Furthermore, we recorded pedestrians’ fixation behavior while the AV approached.Consistently to previous work, single-step AV communication showed a beneficial effect on crossing behavior. Pedestrians initiated their crossing earlier while approaching an AV with an active pitch motion or an eHMI compared to the baseline condition. While active pitch motion reduced subjective safety feeling, eHMI increased it. However, the two-step communication concept did not further improve pedestrians’ crossing initiation times and their safety feeling. The pattern of fixation behavior differed as a function of AV distance. When the approaching AV was far away, pedestrians exclusively looked at the environment. During the approach, pedestrians gradually fixated the bumper and the hood and only then the windshield of the AV. Hence, it seems to be useful to present an AV intent communication at a certain distance from the pedestrian. These findings posit the importance of considering pedestrians’ fixation behavior when developing communication concepts between AVs and pedestrians.     

“Do I Know You?” Altering hairstyle affects facial recognition

Background: Research has demonstrated that both internal features (e.g., eyes) and external features (e.g., hair) are important for recognizing unfamiliar faces; however, the impact of altering hairstyle on the recognition of unfamiliar faces has yet to be isolated and investigated in the absence of deep processing. Objectives: We sought to examine the extent to which altering hair impacts the recognition of a previously viewed face. Methods: Participants were presented with a series of face images followed by a recognition probe of either a new face or a face that was among the previously presented images with either the same hairstyle (identical face) or a different hairstyle (disguised face). Results: Participants showed significantly less accuracy in the disguised condition compared to the identical condition. Conclusions: Our results provide evidence that hairstyle plays a role in recognizing unfamiliar faces. This appears to hold true across race and sex, as well as across deep and shallow processing.     

死亡心理:外部防御还是内在成长?

对西方主要的死亡心理研究进行了回顾和比较分析,不同的死亡心理研究在研究传统、研究对象和研究方法方面存在差异。但是根据研究的侧重点,可以总结出死亡心理的核心内涵:外部防御和内在成长。对死亡的抽象认知产生死亡焦虑,死亡焦虑产生死亡恐惧、自我保护、外在价值导向等外部防御反应;对死亡的具体认知产生死亡反省,死亡反省产生死亡接受、亲社会动机和行为、内在价值导向等内在成长反应。作者以死亡心理的两类反应为框架,综述了近5年来新的研究证据,并对该领域当前研究的局限和未来研究方向进行了分析。     

Out of nothingness: rhythm and the making of words

Abstract: This contribution describes some aspects of the work with a four‐year‐old autistic child who was treated for many years with four times weekly sessions of psychotherapy. The fluctuations between the symbolic and non‐symbolic use of external objects are described, as well as the ever changing quality of the child's object relations. The rhythmical element in the analysand‐analyst interplay is of great importance: the construction of the temporal shapes (Alvarez) and the modulation of presence and absence are relevant as regards the progressive capacity to name aspects of external reality and subjective experience. From a theoretical point of view, the contributions of both the post‐Jungian, including Michael Fordham, and the post‐Kleinian traditions are outlined. The notions of pre‐conception (Bion) and of archetype (Jung) are immensely helpful in working with autistic children as they actually help the analyst in assuming that some proto‐trace of representational potential is always present in the individual.     

急性泪囊炎不同排脓途径的疗效观察

由于急性泪囊炎的一期处理过程中经泪小管引流脓液与经皮肤切开排脓对治疗效果的影响不同,将我院2007年以来接诊的急性泪囊炎患者随机分为观察组与对照组:患者抗感染治疗后经泪小管引流脓液,成人行经鼻内镜泪囊开窗引流术,先天性泪囊炎患儿行泪道探通;对照组患者急性期经皮肤切开排脓、放置引流条和消炎处理后再行泪囊鼻腔吻合术.观察组患者治疗成功率98.46％,外观满意率98.25％;对照组患者治疗成功率89.11％,外观满意率54.35％.观察组患者较对照组患者疗程缩短约7天～10天.急性泪囊炎经全身抗感染治疗后行泪小管引流脓液能更有效地控制炎症,不给患者带来新的创伤,值得临床推广应用.     

Individual Differences in Child Kaleidoblock Responses

The relationship between self-esteem and parental identification was investigated. The hypothesis that self-esteem is positively correlated with parental identification was supported for female college students by two out of three self-esteem measures. For male subjects one social self-esteem measure correlated negatively with maternal identification and a self-concept measure correlated positively. No relationship between self-esteem and paternal identification existed for males: hence the hypothesis was refuted. The importance of social self-esteem in the feminine self-concept and its basis in parental identification is emphasized in the discussion.     

Shoulder Joint Position Sense Improves With External Load

Joint position sense (JPS) is important in the maintenance of optimal movement coordination of limb segments in functional activities. Researchers have shown that the sensitivity of musculotendinous mechanoreceptors increases as muscle activation levels increase. In the present study, when 25 participants tried to replicate the same presented position, both vector and elevation angle repositioning errors decreased linearly as the external load increased up to 40% above unloaded shoulder torque. However, external load had no effect on plane repositioning error. The results indicated that JPS increased under conditions of increasing external load but only in the direction of the applied load. That finding indicates that JPS acuity improves as muscle activation levels increase.     

Data Collection in a Flat World: The Strengths and Weaknesses of Mechanical Turk Samples

Mechanical Turk (MTurk), an online labor system run by Amazon.com, provides quick, easy, and inexpensive access to online research participants. As use of MTurk has grown, so have questions from behavioral researchers about its participants, reliability, and low compensation. In this article, we review recent research about MTurk and compare MTurk participants with community and student samples on a set of personality dimensions and classic decision‐making biases. Across two studies, we find many similarities between MTurk participants and traditional samples, but we also find important differences. For instance, MTurk participants are less likely to pay attention to experimental materials, reducing statistical power. They are more likely to use the Internet to find answers, even with no incentive for correct responses. MTurk participants have attitudes about money that are different from a community sample's attitudes but similar to students' attitudes. Finally, MTurk participants are less extraverted and have lower self‐esteem than other participants, presenting challenges for some research domains. Despite these differences, MTurk participants produce reliable results consistent with standard decision‐making biases: they are present biased, risk‐averse for gains, risk‐seeking for losses, show delay/expedite asymmetries, and show the certainty effect—with almost no significant differences in effect sizes from other samples. We conclude that MTurk offers a highly valuable opportunity for data collection and recommend that researchers using MTurk (1) include screening questions that gauge attention and language comprehension; (2) avoid questions with factual answers; and (3) consider how individual differences in financial and social domains may influence results. Copyright © 2012 John Wiley & Sons, Ltd.