Electrophysiological evidence for age effects on sensory memory processing of tonal patterns

In older adults, difficulties processing complex auditory scenes, such as speech comprehension in noisy environments, might be due to a specific impairment of temporal processing at early, automatic processing stages involving auditory sensory memory (ASM). Even though age effects on auditory temporal processing have been well-documented, there is a paucity of research on how ASM processing of more complex tone-patterns is altered by age. In the current study, age effects on ASM processing of temporal and frequency aspects of two-tone patterns were investigated using a passive listening protocol. The P1 component, the mismatch negativity (MMN) and the P3a component of event-related brain potentials (ERPs) to tone frequency and temporal pattern deviants were recorded in younger and older adults as a measure of auditory event detection, ASM processing, and attention switching, respectively. MMN was elicited with smaller amplitude to both frequency and temporal deviants in older adults. Furthermore, P3a was elicited only in the younger adults. In conclusion, the smaller MMN amplitude indicates that automatic processing of both frequency and temporal aspects of two-tone patterns is impaired in older adults. The failure to initiate an attention switch, suggested by the absence of P3a, indicates that impaired ASM processing of patterns may lead to less distractibility in older adults. Our results suggest age-related changes in ASM processing of patterns that cannot be explained by an inhibitory deficit.     

Members Matter in Team Training: Multilevel and Longitudinal Relationships Between Goal Orientation,Self‐Regulation,and Team Outcomes

Longitudinal data from 338 individuals across 64 teams in a simulation‐based team‐training context were used to examine the effects of dispositional goal orientation on self‐regulated learning (self‐efficacy and metacognition). Team goal orientation compositions, as reflected by average goal orientations of team members, were examined for moderating effects on these individual‐level relationships. Finally, individual‐level self‐regulation was investigated for its influence on multiple team‐level outcomes across time. Results showed generally positive effects of learning goal orientation and negative effects of avoid performance and prove performance goal orientations on rates of self‐regulation during team training. However, several of these individual‐level relationships were moderated by team goal orientation composition. The importance of self‐regulation in teams was displayed by results showing the average level of self‐regulation among a team's members over time was positively associated with team efficacy, team cooperation quality, and team decision making.     

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.     

On Latour’s Social Theory and Theory of Society,and His Contribution to Saving the World

Latour is widely considered a critic and renewer of research in the social sciences. The ecologically minded Left has also acclaimed him as a theorist interested in bringing nature back both into sociological theory and into society and politics. To enable a more detailed discussion of Latour’s claims, I will here outline his theory and the ways in which it is related to classical theory, such as Durkheim, and the methodology of the interpretive paradigm, such as Schütz. My thesis is that Latour’s empirical studies may be read as unfolding the methodological consequences of the interpretive paradigm, and that his early work is a brilliant proof of Durkheim’s theory of the morphology of social facts. Latour has now elaborated the insights he gained from concrete laboratory studies toward a general theory of the social, of society, and of politics. These generalizations have made his theory at least partly problematic. The political implication of Latour’s theory of society is a generalization of the call for equality to encompass everything; in other words, Latour criticizes the exclusion of nonhuman entities from political representation. The paper closes by discussing the political consequences of this proposal.     

The Multidimensional Structure of ‘better than’

Axiomathes - According to the mixed lexicographic/additive account of ‘better than’ and similar aggregative value comparatives like ‘healthier than’, values are...     

Attention effects on auditory scene analysis: insights from event-related brain potentials

Sounds emitted by different sources arrive at our ears as a mixture that must be disentangled before meaningful information can be retrieved. It is still a matter of debate whether this decomposition happens automatically or requires the listener’s attention. These opposite positions partly stem from different methodological approaches to the problem. We propose an integrative approach that combines the logic of previous measurements targeting either auditory stream segregation (interpreting a mixture as coming from two separate sources) or integration (interpreting a mixture as originating from only one source). By means of combined behavioral and event-related potential (ERP) measures, our paradigm has the potential to measure stream segregation and integration at the same time, providing the opportunity to obtain positive evidence of either one. This reduces the reliance on zero findings (i.e., the occurrence of stream integration in a given condition can be demonstrated directly, rather than indirectly based on the absence of empirical evidence for stream segregation, and vice versa). With this two-way approach, we systematically manipulate attention devoted to the auditory stimuli (by varying their task relevance) and to their underlying structure (by delivering perceptual tasks that require segregated or integrated percepts). ERP results based on the mismatch negativity (MMN) show no evidence for a modulation of stream integration by attention, while stream segregation results were less clear due to overlapping attention-related components in the MMN latency range. We suggest future studies combining the proposed two-way approach with some improvements in the ERP measurement of sequential stream segregation.