The alchemy of facilitation revealed through individual stories and collective narrative

Facilitation is a key ‘ingredient’ in the success and sustainability of communities of practice. Yet, little attention has been given to in situ experiences of facilitators of these communities. This paper takes up the challenge to explore these experiences using reflective stories written by seven TATAL (Talking about Teaching and Learning) facilitators (the authors) from different disciplines in five different Australian universities. The authors’ collaborative analysis of their experiences suggests reframing the role of facilitator to include the role of alchemist, a promoter of transformation. This reframing has the potential to change the way higher education community of practice facilitators think about and enact their role. The story-based reflective process used in this self-study could also be used by facilitators to investigate their own practice, as a component of facilitator education programmes or by academics and researchers in other contexts who seek a participatory, collaborative approach to evaluate their practice.     

Derogation of an innocent victim as a function of authoritarianism and involvement

Two studies are reported in which observers witnessed a peer (learner) receiving electric shock and where they did or did not play a role in her suffering (Involved vs Noninvolved conditions). It was found in both studies that while High authoritarians were more likely than Low authoritarians to derogate the learner in Involved conditions, the reverse was true in Noninvolved conditions. These significant interactions (p < .03, p < .01) were interpreted in terms of Low authoritarians derogating in order to preserve their belief in a “just world” and High authoritarians derogating in order to avoid self-blame.     

Robust representations for face recognition: the power of averages

We are able to recognise familiar faces easily across large variations in image quality, though our ability to match unfamiliar faces is strikingly poor. Here we ask how the representation of a face changes as we become familiar with it. We use a simple image-averaging technique to derive abstract representations of known faces. Using Principal Components Analysis, we show that computational systems based on these averages consistently outperform systems based on collections of instances. Furthermore, the quality of the average improves as more images are used to derive it. These simulations are carried out with famous faces, over which we had no control of superficial image characteristics. We then present data from three experiments demonstrating that image averaging can also improve recognition by human observers. Finally, we describe how PCA on image averages appears to preserve identity-specific face information, while eliminating non-diagnostic pictorial information. We therefore suggest that this is a good candidate for a robust face representation.     

Effects of jet engine noise and performance feedback on perceived workload in a monitoring task

This study examined the effects of exposure to intermittent jet aircraft noise (70 dBA or 95 dBA maximum intensity) and knowledge of results concerning signal detections (hit-KR) on performance efficiency and perceived workload in a 40-min visual vigilance task. The noise featured a Doppler-like quality in which planes seemed to approach from the monitor's left and recede to the right. Perceptual sensitivity (d') was poorer in the context of noise than in quiet but only in the presence of hit-KR. The lack of noise-related performance differences in the absence of hit-KR most likely reflected a "floor effect" rather than some special relation between noise and feedback. When compared to subjects performing in quiet, those who operated in noise were less able to profit from hit-KR, a result that may reflect the effects of noise on information processing. In addition to its negative effects on signal detectability, noise elevated the perceived workload, as measured by the NASA-TLX. This effect was robust; it was independent of the presence of hit-KR, even though hit-KR generally lowered the overall level of perceived workload. The results provide the initial experimental demonstration that perceived workload is a sensitive measure of the effects of aircraft noise in monitoring tasks.     

On the Problem of Two-Dimensional Error Scores: Measures and Analyses of Accuracy,Bias, and Consistency

Describing and analyzing error for one-dimensional performance tasks is fairly straightforward, but suggestions for describing and analyzing error for two-dimensional performance tasks (e.g., marksmanship) are quite problematic. Specifically, imposing an arbitrary axis onto the two-dimensional work space, along which traditional one-dimensional measures can be computed and analyzed, yields measures of accuracy, bias, and consistency that are entirely dependent upon the choice of axis. The present contribution offers new measures and methods for describing and analyzing data from two-dimensional performances. Unlike the resu1ts from previous suggestions, the approaches described herein yield results that are completely independent of the axes used to quantify the individual two-dimensional trials. These new approaches are strongly related to well-established methods for describing and analyzing error for one-dimensional tasks.     

Identity Shift in Computer-Mediated Environments

The present study uses a public commitment framework to examine how computer-mediated self-presentations can alter identities. Participants were asked to present with one of two traits, extroversion or introversion, in public or private computer-mediated communication. Public presentations were online, whereas private presentations took place in a text document. Only participants that presented themselves publicly internalized the trait presentation, suggesting that identity shift took place. Public self-presentations also contained more certain and definite forms of language than private self-presentations, suggesting that audiences evoke a more committed form of self-presentation. The findings in this research have important implications for the self-construction of identity online, particularly for individuals that use the Internet as a tool for public self-presentation, such as dating sites, social network sites, or blogs. Also, the findings highlight opportunities for theoretical development on identity construction as a function of computer-mediated communication.