Modulating the sense of agency with external cues

We investigate the processes underlying the feeling of control over one’s actions (“sense of agency”). Sense of agency may depend on internal motoric signals, and general inferences about external events. We used priming to modulate the sense of agency for voluntary and involuntary movements, by modifying the content of conscious thought prior to moving. Trials began with the presentation of one of two supraliminal primes, which corresponded to the effect of a voluntary action participants subsequently made. The perceived interval between movement and effect was used as an implicit measure of sense of agency. Primes modulated perceived intervals for both voluntary and involuntary movements, but the modulation was greatest for involuntary movements. A second experiment showed that this modulation depended on prime–movement (temporal) contiguity. We propose that sense of agency is based on a combination of internal motoric signals and external sensory evidence about the source of actions and effects.     

Striving for a culturally responsive process in training health professionals on Asian American and Pacific Islander youth violence prevention

The quality of youth violence prevention practice is dependent on the quality of education and training of professionals who will care for disadvantaged and/or underserved youth. The authors propose that culturally responsive youth violence prevention curricula, focused on Asian Americans and Pacific Islanders, should: 1) target institutions that train health professionals likely to serve Asian Americans and Pacific Islanders; 2) promote the professional development of Asian American and Pacific Islander students and enhance all students' comfort in addressing behavioral, social, and cultural concerns; 3) cover specific issues relevant to Asian Americans and Pacific Islanders, including the role of acculturative stress, socioeconomic hardship, and other risk factors that may account for mental health disparities; and 4) continuously engage researchers, educators, and community stakeholders in cooperatively and creatively applying new knowledge to clinical challenges. The authors summarize resources for youth violence prevention education that have been used for training healthcare professionals in a multicultural context.     

Quantity judgments of sequentially presented food items by capuchin monkeys (Cebus apella)

Recent assessments have shown that capuchin monkeys, like chimpanzees and other Old World primate species, are sensitive to quantitative differences between sets of visible stimuli. In the present study, we examined capuchins’ performance in a more sophisticated quantity judgment task that required the ability to form representations of food quantities while viewing the quantities only one piece at a time. In three experiments, we presented monkeys with the choice between two sets of discrete homogeneous food items and allowed the monkeys to consume the set of their choice. In Experiments 1 and 2, monkeys compared an entirely visible food set to a second set, presented item-by-item into an opaque container. All monkeys exhibited high accuracy in choosing the larger set, even when the entirely visible set was presented last, preventing the use of one-to-one item correspondence to compare quantities. In Experiment 3, monkeys compared two sets that were each presented item-by-item into opaque containers, but at different rates to control for temporal cues. Some monkeys performed well in this experiment, though others exhibited near-chance performance, suggesting that this species’ ability to form representations of food quantities may be limited compared to previously tested species such as chimpanzees. Overall, these findings support the analog magnitude model of quantity representation as an explanation for capuchin monkeys’ quantification of sequentially presented food items.

Left gaze bias in humans, rhesus monkeys and domestic dogs

While viewing faces, human adults often demonstrate a natural gaze bias towards the left visual field, that is, the right side of the viewee’s face is often inspected first and for longer periods. Using a preferential looking paradigm, we demonstrate that this bias is neither uniquely human nor limited to primates, and provide evidence to help elucidate its biological function within a broader social cognitive framework. We observed that 6-month-old infants showed a wider tendency for left gaze preference towards objects and faces of different species and orientation, while in adults the bias appears only towards upright human faces. Rhesus monkeys showed a left gaze bias towards upright human and monkey faces, but not towards inverted faces. Domestic dogs, however, only demonstrated a left gaze bias towards human faces, but not towards monkey or dog faces, nor to inanimate object images. Our findings suggest that face- and species-sensitive gaze asymmetry is more widespread in the animal kingdom than previously recognised, is not constrained by attentional or scanning bias, and could be shaped by experience to develop adaptive behavioural significance.     

Regulatory fit as a determinant of sport performance: How to succeed in a soccer penalty-shooting

ObjectivesAccording to regulatory focus theory, goal pursuit can be achieved by either keeping a promotion or a prevention focus [Higgins, E. T. (1997). Beyond pleasure and pain. American Psychologist, 52, 1280–1300; Higgins, E. T. (2000). Making a good decision: value from fit. American Psychologist, 55, 1217–1230]. Moreover, it has been assumed that people experience fit when they pursue a goal in a manner that sustains their chronic orientation and that fit has a positive impact on performance. In two studies, we investigated the significance of regulatory focus and fit in the realm of sports performance, such as the success rate in a soccer penalty-shooting task.Methods and ResultsIn a pilot study, we assessed the chronic regulatory orientation of 211 athletes from different sports. Among others, we found more promotion focus with attackers than with defenders. In the main study, we assessed the chronic regulatory orientation of 20 soccer players who took part in a penalty-shooting task. For half of them, the task was described in terms of promotion, for the others in terms of prevention. We found a positive impact of regulatory fit on scoring performance.ConclusionsOur findings demonstrate a great potential of regulatory focus theory for the understanding and enhancement of sport performance. The assessment of athletes' chronic regulatory orientation could be of importance for the selection of athletes, the adjustment of tactics and strategies, and coaches' framing of instructions.     

Automated gait analysis in the open-field test for laboratory mice

In this article, an automated and accurate mouse observation method, based on a conventional test for motor function evaluation, is outlined. The proposed measurement technique was integrated in a regular open-field test, where the trajectory and locomotion of a free-moving mouse were measured simultaneously. The system setup consisted of a transparent cage and a camera placed below it with its lens pointing upward, allowing for images to be captured from underneath the cage while the mouse was walking on the transparent cage floor. Thus, additional information was obtained about the position of the limbs of the mice for gait reconstruction. In a first step, the camera was calibrated as soon as it was fixed in place. A linear calibration factor, relating distances in image coordinates to real-world dimensions, was determined. In a second step, the mouse was located and its body contour segmented from the image by subtracting a previously taken “background” image of the empty cage from the camera image. In a third step, the movement of the mouse was analyzed and its speed estimated from its location in the past few images. If the speed was above a 1-sec threshold, the mouse was recognized to be running, and the image was further processed for footprint recognition. In a fourth step, color filtering was applied within the recovered mouse region to measure the position of the mouse’s paws, which were visible in the image as small pink spots. Paws that were detected at the same location in a number of subsequent images were kept as footprints—that is, paws in contact with the cage floor. The footprints were classified by their position relative to the mouse’s outline as corresponding to the front left or right paw or the hind left or right paw. Finally, eight parameters were calculated from the footprint pattern to describe the locomotion of the mouse: right/left overlap, front/hind base, right/left front limb stride, and right/left hind limb stride. As an application, the system was tested using normal mice and mice displaying pentobarbital-induced ataxia. The footprint parameters measured using the proposed system showed differences of 10% to 20% between normal and ataxic mice.     

The tragedy of a comic: fundamentalists crusading against fundamentalists

Christian Fundamentalists used to read the apocalyptic scenario through the “red” filter of communism, but since the 1980s the target has shifted to the “green tide” of Islam. One of the more colorful Fundamentalist diatribes against Islam is cartoon evangelist Jack Chick’s The Prophet, a comic book that calls Islam a Satanic plot hatched by the Catholic church. This article examines the rhetoric of Christian Fundamentalist diatribe against Islam in light of apocalyptic scenarios drawn out of biblical prophecy. Chick’s comic and the millenarian Hal Lindsay’s The Late Great Planet Earth are placed in the context of doctrinal attacks on Islam in medieval Christendom. In tracing the usage of “Islamic fundamentalism,” I argue that the term “fundamentalism” is problematic for cross-cultural studies of religious expression and movements.