Gender characteristics of cerebral hemodynamics during complex cognitive functioning

Functional Transcranial Doppler sonography (fTCD) has been applied to assess peak mean cerebral blood flow velocity (MFV) with a high temporal resolution during cognitive activation. Yet, little attention has been devoted to gender-related alterations of MFV, including spectral analysis. In healthy subjects, fTCD was used to investigate a series of cerebral hemodynamic parameters in the middle cerebral arteries (MCA) during the Trail Making Tests (TMT), a means of selective attention and complex cognitive functioning. In females, there was a frequency peak at 0.375 Hz in both MCA, and we observed a dynamic shift in hemispheric dominance during that condition. Further, after the start phase, there was an MFV decline during complex functioning for the entire sample. These novel results suggest condition-specific features of cerebral hemodynamics in females, and it adds to the notion that gender is a fundamental confounder of brain physiology.     

Inference is bliss: using evolutionary relationship to guide categorical inferences

Three experiments, adopting an evolutionary biology perspective, investigated subjects' inferences about living things. Subjects were told that different enzymes help regulate cell function in two taxa and asked which enzyme a third taxon most likely uses. Experiment 1 and its follow-up, with college students, used triads involving amphibians, reptiles, and mammals (reptiles and mammals are most closely related evolutionarily) and plants, fungi, and animals (fungi are more closely related to animals than to plants). Experiment 2, with 10th graders, also included triads involving mammals, birds, and snakes/crocodilians (birds and snakes/crocodilians are most closely related). Some subjects received cladograms (hierarchical diagrams) depicting the evolutionary relationships among the taxa. The effect of providing cladograms depended on students' background in biology. The results illuminate students' misconceptions concerning common taxa and constraints on their willingness to override faulty knowledge when given appropriate evolutionary evidence. Implications for introducing tree thinking into biology curricula are discussed.     

Stress and coping among early childhood intervention professionals receiving reflective supervision: A qualitative analysis

Reflective supervision/consultation (RS/C) is an important component of infant mental health training and practice. Given high levels of job stress reported by a variety of early childhood professionals, the present study offers a qualitative examination of early childhood intervention professionals’ perceptions of stress and coping before and after receiving regular RS/C. Thirty-one professionals received 9 months of RS/C and completed semistructured interview questionnaires at the pre-/postassessments. Questionnaires focused on job-related experiences, including what participants found stressful and how they coped with job-related stress. Inductive analysis techniques were used to identify themes that arose from the data. Relationships between themes were discovered through axial coding. Three key themes of individual, relational, and organizational stress were identified across the pre-/postassessments. Similar themes were evident in reports of coping. Following 9 months of RS/C, analysis revealed greater detail and reflection among the majority of participants. These results contribute to the literature through identification of multiple levels of stress and coping as well as areas of continuity and change among participants receiving RS/C. Future research should consider how professionals’ reports of stress and coping relate to reported self-efficacy and observed competence with young children and families.     

Measurement of nerve growth factor serum concentration in a psychologically stressful situation in men

Psychologically stressful events have been reported to elevate nerve growth factor (NGF) serum concentrations. NGF and cortisol serum concentrations were measured in 20 healthy male volunteers before (3 p.m.) and after (5 p.m.) an academic oral presentation and on a control day. Cortisol showed a significant overall change (p=0.001), i.e. cortisol serum concentrations were increased on the lecture day at 3 p.m. (p=0.007; 155%) and at 5 p.m. (p=0.001; 175%) as compared with the control day. In contrast to cortisol no significant differences among the four serum NGF measurements was detected (Chi-quadrat 2.94, df=3, p=0.401), i.e. the NGF serum concentrations remained unchanged on the lecture day at 3 p.m. (p=0.279) and at 5 p.m. (p=0.627) as compared with the control day. We conclude that NGF serum levels do not change during acute stress, at least after this type of stressor.     

Problem solving skills in young yellow-crowned parakeets (Cyanoramphus auriceps)

Despite the long divergent evolutionary history of birds and mammals, early avian and primate cognitive development have many convergent features. Some of these features were investigated with a series of tasks designed to assess human infant development. The tasks were presented to young parakeets to assess their means-end problem solving abilities. Examples of these early skills are: attaining and playing with objects, retrieving rewards through use of a stick or rake, or by pulling in rewards on supports or on the ends of strings. Twelve such tasks were presented to 11 young yellow-crowned parakeets (Cyanoramphus auriceps) to investigate their natural abilities; there was no attempt to train them to do those tasks that they did not spontaneously perform. Six of the birds were parent-raised and five were hand-raised. The birds completed 9 of the 12 tasks, demonstrating all the Piagetian sensorimotor circular reactions, but they failed to hand-watch ("claw-watch"), to stack objects, or to fill a container. Their ordinality on the tasks differed from that of human infants in that locomotion to obtain objects occurred earlier in the avian sequence of development and the mid-level tasks were performed by the two groups of avian subjects in a mixed order perhaps indicating that these abilities may not emerge in any particular order for these birds as they supposedly do for human infants. The hand-raised group needed fewer sessions to complete these means-end tasks. Electronic Publication     

Does interhemispheric competition mediate motion-induced blindness? A transcranial magnetic stimulation study

Motion-induced blindness (MIB) is a phenomenon, perhaps related to perceptual rivalry, where stationary targets disappear and reappear in a cyclic mode when viewed against a background (mask) of coherent, apparent 3-D motion. Since MIB has recently been shown to share similar temporal properties with binocular rivalry, we probed the appearance-disappearance cycle of MIB using unilateral, single-pulse transcranial magnetic stimulation (TMS)--a manipulation that has previously been shown to influence binocular rivalry. Effects were seen for both hemispheres when the timing of TMS was determined prospectively on the basis of a given subject's appearance-disappearance cycle, so that it occurred on average around 300 ms before the time of perceptual switch. Magnetic stimulation of either hemisphere shortened the time to switch from appearance to disappearance and vice versa. However, TMS of left posterior parietal cortex more selectively shortened the disappearance time of the targets if delivered in phase with the disappearance cycle, but lengthened it if TMS was delivered in the appearance phase after the perceptual switch. Opposite effects were seen in the right hemisphere, although less marked than the left-hemisphere effects. As well as sharing temporal characteristics with binocular rivalry, MIB therefore seems to share a similar underlying mechanism of interhemispheric modulation. Interhemispheric switching may thus provide a common temporal framework for uniting the diverse, multilevel phenomena of perceptual rivalry.     

Audiovisual phenomenal causality

We report three experiments in which visual or audiovisual displays depicted a surface (target) set into motion shortly after one or more events occurred. A visual motion was used as an initial event, followed directly either by the target motion or by one of three marker events: a collision sound, a blink of the target stimulus, or the blink together with the sound. The delay between the initial event and the onset of the target motion was varied systematically. The subjects had to rate the degree of perceived causality between these events. The results of the first experiment showed a systematic decline of causality judgments with an increasing time delay. Causality judgments increased when additional auditory or visual information marked the onset of the target motion. Visual blinks of the target and auditory clacks produced similar causality judgments. The second experiment tested several models of audiovisual causal processing by varying the position of the sound within the visual delay period. No systematic effect of the sound position occurred. The third experiment showed a subjective shortening of delays filled by a clack sound, as compared with unfilled delays. However, this shortening cannot fully explain the increased tolerance for delays containing the clack sound. Taken together, the results are consistent with the interpretation that the main source of the causality judgments in our experiments is the impression of a plausible unitary event and that perfect synchrony is not necessary in this case.     

Psychological aspects of childbirth: Evidence for a birth‐related mindset

Psychological research on childbirth is rare, even though research from other scientific fields such as obstetrics or midwifery highlights the importance of psychological factors in childbirth. In this article, the theoretical construct of a birth‐related mindset and direct and indirect measures for assessing the mindset are proposed. It is assumed that childbirth can be mentally presented as a rather natural (natural mindset) or a rather medicalized (medicalized mindset) event. In three online studies (Study 1: N = 117, Study 2: N = 206, Study 3: N = 192), we aimed to explore whether the proposed birth‐related mindset is related to the retrospectively reported process of labor and birth (operationalized, e.g., by performed interventions, duration of birth, place of birth). For this, the relation between the mothers’ birth‐related decisions and outcomes of childbirth and the mothers' birth‐related mindsets were analyzed. Results indicated that (1) birth‐related criteria such as place of birth, epidural anesthesia, and C‐sections were associated with the birth‐related mindset, (2) these aspects of the delivery were related to the evaluation of the birth (birth experience), (3) the birth‐related mindset moderated the relationship between C‐section and birth experience, and (4) the indirect measures had little to no added explanatory value to the developed Mindset and Birth Questionnaire. Thus, the results indicate that the birth process experienced by the women and the mental representations of birth (birth‐related mindset) are closely related. Future studies need to investigate to what extend the experienced birth process influences the mindset of birth, or the mindset the experienced birth process, or both.     

Wittgenstein as a Philosopher of Technology: Tool Use,Forms of Life,Technique, and a Transcendental Argument

The work of Ludwig Wittgenstein is seldom used by philosophers of technology, let alone in a systematic way, and in general there has been little discussion about the role of language in relation to technology. Conversely, Wittgenstein scholars have paid little attention to technology in the work of Wittgenstein. In this paper we read the Philosophical Investigations and On Certainty in order to explore the relation between language use and technology use, and take some significant steps towards constructing a framework for a Wittgensteinian philosophy of technology. This framework takes on board, and is in line with, insights from postphenomenological and hermeneutic approaches, but moves beyond those approaches by benefiting from Wittgenstein’s insights into the use of tools, technique, and performance, and by offering a transcendental interpretation of games, forms of life, and grammar. Focusing on Wittgenstein’s philosophy of language in the Investigations, we first discuss the relation between language use and technology use, understood as tool use, by drawing on his analogy between language and tools. This suggests a more general theory of technology use, understood as performance. Then we turn to his epistemology and argue that Wittgenstein’s understanding of language use can be embedded within a more general theory about technology use understood as tool use and technique, since language-in-use is always already a skilled and embodied technological practice. Finally, we propose a transcendental interpretation of games, forms of life, and grammar, which also gives us a transcendental way of looking at technique, technological practice, and performance. With this analysis and interpretation, further supported by comments on robotics and music, we contribute to using and integrating Wittgenstein in a more systematic way within philosophy of technology and engage with perennial questions from the philosophical tradition.     

Bonds to the homeland: Patterns and determinants of women's transnational travel frequency among three immigrant groups in Germany

Technology developments have changed immigrants' adaptation patterns in modern societies, allowing immigrants to sustain dense, complex connections with homeland while adjusting in the host country, a new phenomenon termed transnationalism. As empirical studies on immigrant transnationalism are still scarce, the purpose of this study was to investigate mean levels and determinants of a core component of transnationalism—transnational travel. Hypotheses were based on context of exiting homeland, living conditions in Germany and demographic and sociocultural variables. Transnational travel behaviour was assessed as frequency of return trips in three immigrant groups in Germany: ethnic Germans, Russian Jews and Turks. Interviews were conducted with 894 women participants from these groups. Results showed substantial transnational travel behaviour in all groups with Turks reporting higher levels than ethnic Germans and Russian Jews. Interindividual differences in transnational travel within groups were also examined. Results indicated similarities (e.g. network size in home country related positively to transnational travel frequency in all groups) and group‐specific associations (e.g. co‐ethnic identifying related positively to transnational travel frequency among Turks, but negatively for the other groups). Our study highlights the need for a new understanding of immigration and emphasises the consideration of group‐specific mechanisms in transnational travel behaviour.