Fearful faces modulate looking duration and attention disengagement in 7-month-old infants

The present study investigated whether facial expressions modulate visual attention in 7-month-old infants. First, infants' looking duration to individually presented fearful, happy, and novel facial expressions was compared to looking duration to a control stimulus (scrambled face). The face with a novel expression was included to examine the hypothesis that the earlier findings of greater allocation of attention to fearful as compared to happy faces could be due to the novelty of fearful faces in infants' rearing environment. The infants looked longer at the fearful face than at the control stimulus, whereas no such difference was found between the other expressions and the control stimulus. Second, a gap/overlap paradigm was used to determine whether facial expressions affect the infants' ability to disengage their fixation from a centrally presented face and shift attention to a peripheral target. It was found that infants disengaged their fixation significantly less frequently from fearful faces than from control stimuli and happy faces. Novel facial expressions did not have a similar effect on attention disengagement. Thus, it seems that adult-like modulation of the disengagement of attention by threat-related stimuli can be observed early in life, and that the influence of emotionally salient (fearful) faces on visual attention is not simply attributable to the novelty of these expressions in infants' rearing environment.     

Verbal self‐instructions in task switching: a compensatory tool for action‐control deficits in childhood and old age?

This study examined the influence of verbal self-instructions on age differences in task switching. Task-switching ability, measured as the difference between performance in single-task blocks and in mixed-task blocks in which participants switch between two tasks (mixing costs), increases during childhood and decreases in old age. To measure the influence of language on task switching, we compared conditions in which participants either (a) named the next task to be performed (i.e. task-relevant verbalization), (b) verbalized words not related to the task at hand (i.e. task-irrelevant verbalization), or (c) did not verbalize (control condition). Results indicated that mixing costs were substantially reduced under task-relevant verbalization and increased under task-irrelevant verbalization. Moreover, age-related differences in mixing costs were increased when the use of inner speech was disrupted and were reduced when participants performed task-relevant verbalization. These findings suggest that verbal self-instructions are a useful tool for retrieving the next task goal and for reducing action-control deficits in younger children and older adults.     

Classification of dog barks: a machine learning approach

In this study we analyzed the possible context-specific and individual-specific features of dog barks using a new machine-learning algorithm. A pool containing more than 6,000 barks, which were recorded in six different communicative situations was used as the sound sample. The algorithm's task was to learn which acoustic features of the barks, which were recorded in different contexts and from different individuals, could be distinguished from another. The program conducted this task by analyzing barks emitted in previously identified contexts by identified dogs. After the best feature set had been obtained (with which the highest identification rate was achieved), the efficiency of the algorithm was tested in a classification task in which unknown barks were analyzed. The recognition rates we found were highly above chance level: the algorithm could categorize the barks according to their recorded situation with an efficiency of 43% and with an efficiency of 52% of the barking individuals. These findings suggest that dog barks have context-specific and individual-specific acoustic features. In our opinion, this machine learning method may provide an efficient tool for analyzing acoustic data in various behavioral studies.     

Comparing online and lab methods in a problem-solving experiment

Online experiments have recently become very popular, and--in comparison with traditional lab experiments--they may have several advantages, such as reduced demand characteristics, automation, and generalizability of results to wider populations (Birnbaum, 2004; Reips, 2000, 2002a, 2002b). We replicated Dandurand, Bowen, and Shultz's (2004) lab-based problem-solving experiment as an Internet experiment. Consistent with previous results, we found that participants who watched demonstrations of successful problem-solving sessions or who read instructions outperformed those who were told only that they solved problems correctly or not. Online participants were less accurate than lab participants, but there was no interaction with learning condition. Thus, we conclude that online and Internet results are consistent. Disadvantages included high dropout rate for online participants; however, combining the online experiment with the department subject pool worked well.     

Identifying decision strategies: A process- and outcome-based classification method

This article presents a classification method that makes possible the detection of important decision strategies that people use in nonrisky multiattribute decision tasks. The classification method incorporates a multimethod approach that combines elements of both structural modeling and process tracing. We begin with a discussion of nine common characteristics of decision strategies and then classify 13 decision strategies on the basis of these characteristics. Next, we demonstrate that six of the characteristics can be used to develop one outcome-based and three process-based metrics. In addition, we present an algorithm that shows how to use the metrics. We demonstrate that using our metrics in conjunction with a measure for direction of search allows identification of most of the 13 decision strategies. Finally, we outline the potential of our research for the design of decision support systems such as online shops.     

Psychische Betreuung von Patienten und Angehörigen in der Transplantationsmedizin

During the decision making process and waiting period before organ transplantation patients and their families often suffer from psychological distress. After transplantation a subgroup of patients keeps showing psychological symptoms and also impairments of quality of life. Psychological treatment manuals are often demanded, but are rarely achieved. This study describes the experience with a low frequent (8 sessions/year) therapeutic group for lung transplant candidates. The group, which is based on a cognitive behavioural concept, is lead by a physician (internal medicine), a psychotherapist and a physiotherapist. This therapeutic group has been continuously offered for patients and their caregivers for the past 7 years. About 50% of all patients participated in this program before transplantation, after transplantation only a few patients visited the group sessions. On average 12 patients and 8 caregivers visited each session. One problem for these patients with severe lung-disease was the long distance between patient’s homes and the hospital. This has been the reason for self-help organisations to demand better psychotherapeutic outpatient support for patients and their families before and after organ transplantation.     

Teaching Otherwise

In this paper I discuss some conditions forunderstanding teaching as an act ofresponsibility towards an other, rather than asan instrumental act identified throughepistemology. I first put the latter intocontext through a critical reading of teachingas it is inscribed in humanistic discourses oneducation. Within these discourses, I explorehow students are treated as objects ofknowledge that reinforce the teacher's ego. Icontend that the taking up of this positionmakes not only an ethical relation to thestudent impossible, but also disqualifies anytype of meaningful social relation. Therefore Iargue that teachers have to give up theirposition on the safe side of knowledge andparticipate in the time of risk when meetingthe other means to take responsibility for thatother from a position of vulnerability.Moreover, it is precisely because of this riskthat teaching as an ethical relation becomespossible and where it begins to resound withpoetry.