This article reports on decision-making under time pressure conditions. It aims at testing the Recognition-Primed Decision model with regard to volleyball. Seven male expert players participated in ...this study. A match was videotaped; each player was interviewed in a self-confrontation interview. Inductive and deductive analysis revealed three main results. The first showed that their decision-making was based on a recognition process of the situation typicality. The second emphasized that this process had four by-products: (a) expectations, (b) relevant cues, (c) plausible goals, and (d) typical action. The players did not equally report these by-products. The third main result showed that the decisions were largely prearranged. They consisted of an association between a typical situation and a typical action, the typical action was then adapted to the current situation. The results are discussed in relation to the Recognition-Primed Decision model and to research that has considered decision-making.
Abstract
Magnetar giant flares are rare and highly energetic phenomena observed in the transient sky whose emission mechanisms are still not fully understood. Depending on the nature of the excited ...modes of the magnetar, they are also expected to emit gravitational waves (GWs), which may bring unique information about the dynamics of the excitation. A few magnetar giant flares have been proposed to be associated with short gamma-ray bursts. In this paper we use a new gravitational-wave search algorithm to revisit the possible emission of GWs from four magnetar giant flares within 5 Mpc. While no gravitational-wave signals were observed, we discuss the future prospects of detecting signals with more sensitive gravitational-wave detectors. In particular, we show that galactic magnetar giant flares that emit at least 1% of their electromagnetic energy as GWs could be detected during the planned observing run of the LIGO and Virgo detectors at design sensitivity, with even better prospects for third-generation detectors.
This article aimed to gain an understanding of the process of debriefing during major competitions in elite team sports. Debrief interviews were conducted with 9 head coaches. The interview data were ...used to identify how head coaches divided up the tasks given to staff and team members prior to, and during the post-match debriefing. Results showed that debriefing consisted of two steps: preparation and presentation. Preparation referred to four successive tasks. Presentation to the team of players consisted of eight tasks relating to transformational and transactional styles of leadership. Coaches were shown to divide the labor within the staff and team. The data tend to support the view that in elite team sports, coaches are both transformational and transactional leaders, adapting their style of leadership to the situation, athletes and time available. This study provides insights into the task-work and team-work underlying team functioning and division of labor.
•We presented a model of the debriefing process used by coaches in elite team sports.•Coaches were shown to divide the labor within the staff and team.•Results showed that debriefing consisted of two steps: preparation and presentation.•Coaches were transformational and transactional leaders.
This paper reports on a study of naturalistic decision-making in expert badminton players. These decisions are frequently taken under time-pressured conditions, yet normally lead to successful ...performance. Two male badminton teams participated in this study. Self-confrontation interviews were used to collect data. Inductive data analysis revealed three types of intentions during a rally: to maintain the rally; to take the advantage; and to finish the point. It also revealed eight types of decision taken in this situation: to ensure an action; to observe the opponent's response to an action; to realize a limited choice; to influence the opponent's decision; to put pressure on an opponent; to surprise the opponent; to reproduce an efficient action; and to play wide. A frequent decision was to put pressure on the opponent. Different information and knowledge was linked to specific decisions. The results are discussed in relation to research that has considered naturalistic decision-making.
A comprehensive analysis was carried out of the composition of seed coat mucilage from Arabidopsis thaliana using the Columbia-0 accession. Pectinaceous mucilage is released from myxospermous seeds ...upon imbibition, and in Arabidopsis consists of a water-soluble, outer layer and an adherent, inner layer. Analysis of monosaccharide composition in conjunction with digestion with pectolytic enzymes conclusively demonstrated that the principal pectic domain of both layers was rhamnogalacturonan I, and that in the outer layer this was unbranched. The macromolecular characteristics of the water-soluble mucilage indicated that the rhamnogalacturonan molecules in the outer layer were in a slightly expanded random-coil conformation. The inner, adherent layer remained attached to the seed, even after extraction with acid and alkali, suggesting that its integrity was maintained by covalent bonds. Confocal microscopy and monosaccharide composition analyses showed that the inner layer can be separated into two domains. The internal domain contained cellulose microfibrils, which could form a matrix with RGI and bind it to the seed. In effect, in the mum5-1 mutant where most of the inner and outer mucilage layers were water soluble, cellulose remained attached to the seed coat. Immunolabeling with anti-pectin antibodies indicated the presence of galactan and arabinan in the inner layer, with the latter only present in the non-cellulose-containing external domain. In addition, JIM5 and JIM7 antibodies labeled different domains of the inner layer, suggesting the presence of stretches of homogalacturonan with different levels of methyl esterification.
This article presents a method for studying the consistency of coaches’ and athletes’ situation understanding. Three elite athletes and their coach were video recorded during winter training session, ...international summer competition, and training session following competition. Postperformance self-confrontation interviews were conducted separately with each participant, who was asked to describe his/her activity in relation to the events observed. Interview data were used to characterize compatible (i.e., similar or the same) information between coach and athlete and modes of compatibility. Results showed compatible situation understanding was based on five information categories: (a) technical elements, (b) athlete’s psychological states, (c) organization and safety, (d) performance, and (e) athlete’s experience. Results also showed whether coaches’ and athletes’ information were not compatible, compatible, or mutually compatible. The method used and specific findings are discussed in relation to the analysis of consistency of coaches’ and athletes’ situation understanding from larger samples of participants.
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