Metasearch accuracy for letters and symbols: do our intuitions match empirical reality?

The “familiarity effect” (Shen and Reingold, Perception & Psychophysics 63(3):464–475, 2001) is a phenomenon in which unfamiliar symbols perceptually “pop-out” when placed among familiar symbols (e.g., letters). In contrast, searching for familiar symbols among unfamiliar symbols is more challenging. Failure to account for effects such as these when predicting search performance could lead to overconfidence and error. This study investigated metacognitive awareness of the familiarity effect by asking participants to rate the speed and accuracy of search before they searched for either letter or symbol targets among letter or symbol distractors. Feature overlap between target and distractor and target presence or absence were also manipulated to provide concurrent cues to task difficulty. This study examined metacognitive awareness of the “familiarity effect,” and extended the findings from an earlier metasearch study (Redford et al., Memory and Cognition 39:1534–1545, 2011). Metacognition was accurate with respect to the familiarity effect. However, participants incorrectly predicted that they would detect a target’s absence faster than its presence. These findings suggest that people have metacognitive awareness for some aspects of visual search, even when patterns of search performance are complex and potentially counterintuitive. However, limitations exist in our metacognitive awareness of visual search. The results are discussed in relation to Koriat’s cue utilization framework and heuristic-based metacognition.     

A surprising discovery: five pedagogical skills outdoor and experiential educators might offer more mainstream educators in this time of change

This article draws from the experience of outdoor and experiential educators working in the context of a radical, long-term formal public education research project. One of the accidental findings from the research is that experienced outdoor educators may have particular pedagogical skills, likely honed by the contexts in which they work, that can be of use to mainstream educators trying to expand their pedagogical repertoire, teach outdoors or be more environmentally focused in their practices. The article begins by contextualising the Maple Ridge Environmental School Project, describing the researchers and methods and explaining how the research team came to their insights. A discussion follows of five pedagogical skills identified by the researchers that outdoor and experiential educators may possess which might be offered more clearly to classroom teachers and formal teacher training processes and/or be more clearly enunciated for those involved in formal and informal outdoor and experiential training contexts.     

Optimally Engineering Traditional Introductory Physics Classes

This paper presents a measurement of the time and resources committed to traditional student actions such as reading and working homework. The perception of the educational value of each basic action for both students and faculty is captured. From this information, basic educational efficiencies are computed for a traditional mechanics course and a non-traditional hands-on Electricity and Magnetism course. The calculations show an allocation of resources in the traditional course which uses the most student time in the least educationally valuable activity. The computed efficiencies also show overseen student note-taking as potentially a very valuable general tool. The techniques presented allow any institution to carry out quantitative educational engineering of their course offerings at the highest level.     

Repeatability of three-dimensional thorax and pelvis kinematics in the golf swing measured using a field-based motion capture system

Field-based methods of evaluating three-dimensional (3D) swing kinematics offer coaches and researchers the opportunity to assess golfers in context-specific environments. The purpose of this study was to establish the inter-trial, between-tester, between-location, and between-day repeatability of thorax and pelvis kinematics during the downswing using an electromagnetic motion capture system. Two experienced testers measured swing kinematics in 20 golfers (handicap < or =14 strokes) on consecutive days in an indoor and outdoor location. Participants performed five swings with each of two clubs (five-iron and driver) at each test condition. Repeatability of 3D kinematic data was evaluated by computing the coefficient of multiple determination (CMD) and the systematic error (SE). With the exception of pelvis forward bend for between-day and between-tester conditions, CMDs exceeded 0.854 for all variables, indicating high levels of overall waveform repeatability across conditions. When repeatability was compared across conditions using MANOVA, the lowest CMDs and highest SEs were found for the between-tester and between-day conditions. The highest CMDs were for the inter-trial and between-location conditions. The absence of significant differences in CMDs between these two conditions supports this method of analysing pelvis and thorax kinematics in different environmental settings without unduly affecting repeatability.     

Mechanisms of social capital creation and consumption in a youth baseball league

Abstract

In this paper, I explore social capital creation within a youth baseball league in the American Southwest. Within, I first propose a parent typology that centres on the level of parental social and pragmatic involvement with their child’s team. Second, I examine that the specific facets of league structure facilitate relationship building among parents and volunteers within the league, including team creation, practices and games, all-star participation, volunteering, and player relationships, all of which play both a facilitating and constraining role in the types of relationships parents were prone to forming, and the social capital benefits that were likely to accrue within.     

A battery of strength tests for evidence-based classification in Para swimming

This study examined the validity of isometric strength tests for evidence-based classification in Para swimming. Thirty non-disabled participants and forty-two Para swimmers with physical impairment completed an isometric strength test battery designed to explain activity limitation in the freestyle discipline. Measures pertaining to dominant and non-dominant limb strength and symmetry were derived from four strength tests that were found to be reliable in a cohort of non-disabled participants (ICC = 0.85–0.97; CV = 6.4–9.1%). Para swimmers had lower scores in strength tests compared with non-disabled participants (d = 0.14–1.00) and the strength test battery successfully classified 95% of Para swimmers with physical impairment using random forest algorithm. Most of the strength measures had low to moderate correlations (r = 0.32 to 0.53; p ≤ 0.05) with maximal freestyle swim speed in Para swimmers. Although, fewer correlations were found when Para swimmers with hypertonia or impaired muscle power were analysed independently, highlighting the impairment-specific nature of activity limitation in Para swimming. Collectively, the strength test battery has utility in Para swimming classification to infer loss of strength in Para swimmers, guide minimum eligibility criteria, and to define the impact that strength impairment has on Para swimming performance.     

The “madness” of market logic: mental illness and late capitalism in The Double and Nightcrawler

This paper examines representations of mental illness in popular film, particularly Richard Ayoade’s The Double and Dan Gilroy’s Nightcrawler. As I argue, both films trouble typical Hollywood narratives of mental illness by situating schizophrenia and psychopathy, for instance, within a socioeconomic context, specifically relations of production under late capitalism and the unfettered self-interest of neoliberalism. If mental illness is a product of the postindustrial workplace in The Double, it becomes a prerequisite for success in Nightcrawler, providing a cinematic depiction of mental illness at odds with the “personal pathology” paradigm that dominates the current neoliberal landscape.     

Portable computers for teachers and support services working with pupils with Special Educational Needs: An evaluation of the 1999 United Kingdom Department for Education and Employment scheme

This study arose from the distribution of portable computers ("portables") to special educational needs coordinators and support services by the Department for Education and Employment (DfEE) through Standards Grant 36 in mid 1999. The study comprised two successive questionnaires. The aim of the surveys was to elicit the benefits of portables in relation to the special educational needs coordinator/support service roles as well as to evaluate this process of distributing resources.
Questionnaire A to local education authorities (LEAs) was returned by 96 LEAs (a 64% return rate). There were 778 returns of questionnaire B from recipients of portables and 405 returns from the matched group of non-recipients.
Overall the distribution of portables under this grant was well-regarded by LEA personnel, particularly in the smaller authorities, with reservations relating mainly to the lack of time to administer the scheme. The guidance from the DfEE was regarded as helpful with inherent (valued) flexibility. Amount and level of training appeared to have varied greatly across LEAs but where training had been relatively substantial there was evidence of its impact on teachers' reported use of the portables. The scheme was welcomed by school and, particularly, support service staff. However all recipient groups tended to reflect some disappointment with what the portable provided in practice.
Three particular aspects are discussed in more detail. First, in relation to time and workload issues, it was reported that teachers were spending considerable "non work" time in learning to make good use of the portables. Second, there were considerable training needs for teachers and others, spanning a wide range of levels. Third, the position of support service staff warranted more attention as their apparently comparatively disadvantageous position has implications for wider changes concerning centralised LEA, as opposed to school-based, resources.     

Multiple Representations in Computational Thinking Tasks: A Clinical Study of Second-Grade Students

Journal of Science Education and Technology - Computational thinking requires high cognitive load as students work to manage multiple tasks in their problem-solving environment. Through research in...