normal and abnormal responses to changing visual cues with eyes open in situations relevant to daily living ( Jeka et al., 2006 ). In the past few years, there have been substantial advancements in virtual reality (VR) technology. The ability to carefully manipulate visual environments has become simpler
Anat V. Lubetzky, Daphna Harel, Helene Darmanin and Ken Perlin
Michael Gay and Semyon Slobounov
dysfunction (structural data) in the brain after trauma. Advances in modalities such as functional neuroimaging, quantitative electroencephalography, and virtual reality–based cognitive testing combined with current clinical batteries of exams such as neuropsychological testing, oculomotor examination, and
Alba Reguant-Closa, Margaret M. Harris, Tim G. Lohman and Nanna L. Meyer
and macronutrients to body mass (BM), weight categories were defined by gender (60 kg females [f] and 75 kg males [m]). Each sport dietitian created 18 plates. To avoid food waste, half of the plates were created “virtually” on paper, whereas the other half were created with food. For the virtual
Gunnar Treff, Kay Winkert, Katja Machus and Jürgen M. Steinacker
based on the criteria that would normally cause TERM auto , when activated. The virtual test duration at TERM auto was compared with the actual test duration after TERM exhaust . Metabolic Analysis Gas exchange and ventilation were measured with a Metamax 3x (Cortex Biophysics, Leipzig, Germany) to
Lane Wakefield and Gregg Bennett
Virtual fan communities (VFC) have become very popular among fans of sports teams. A VFC provides an online place for fans to meet and discuss the team, consume media, and develop friendships. Students will learn, in this case study, how to use partial least squares structural equation modeling (PLS-SEM) to assess fan attitudes toward the VFC and sponsors of the firm. Students will also learn how sport organizations can benefit from leadership with statistical know-how. The case is fictional, but it is based on an actual research study conducted in conjunction with a prominent virtual fan community in which ownership had an interest in fans’ attitudes toward their service.
Paolo Taboga, Alena M. Grabowski, Pietro Enrico di Prampero and Rodger Kram
In the 2012 Paralympic 100 m and 200 m finals, 86% of athletes with a unilateral amputation placed their unaffected leg on the front starting block. Can this preference be explained biomechanically? We measured the biomechanical effects of starting block configuration for seven nonamputee sprinters and nine athletes with a unilateral amputation. Each subject performed six starts, alternating between their usual and unusual starting block configurations. When sprinters with an amputation placed their unaffected leg on the front block, they developed 6% greater mean resultant combined force compared with the opposite configuration (1.38 ± 0.06 vs 1.30 ± 0.11 BW, P = .015). However, because of a more vertical push angle, horizontal acceleration performance was equivalent between starting block configurations. We then used force data from each sprinter with an amputation to calculate the hypothetical starting mechanics for a virtual nonamputee (two unaffected legs) and a virtual bilateral amputee (two affected legs). Accelerations of virtual bilateral amputees were 15% slower compared with athletes with a unilateral amputation, which in turn were 11% slower than virtual nonamputees. Our biomechanical data do not explain the starting block configuration preference but they do explain the starting performance differences observed between nonamputee athletes and those with leg amputations.
Bob W. Kooi and Max Kuipers
The maneuvers of a competition diver on a springboard before takeoff may serve to maximize the height of the flight phase. To simplify analysis, it is often assumed that the diver performs motions at the top of a single degree-of-freedom (DOF) system, usually consisting of one mass and one linear spring. This system is expected to simulate the behavior of the board sufficiently. In this paper we propose a new single DOF system approximating the effects of a board with passable accuracy. This model is applied to three types of springboards to obtain numerical values for their virtual masses at the tip.
Craig A. Morehead, Brendan O’Hallarn and Stephen L. Shapiro
The Internet has drastically changed how society seeks and consumes information. One influential change in the communication process is the widespread use—and perhaps abuse—of user-generated content. If provided a frame of reference to help direct the discussion, such as a news story, comment functions can act as a proxy “town hall” in a virtual setting. Unique to this cyber town hall, however, is the sense of anonymity that leads some users to post content they would not normally voice in a public context. This investigation intertwines uses-and-gratifications theory and online disinhibition effect by analyzing anonymous-comment postings on a newspaper Web site. Seven newspaper stories on the campus master plan and football-stadium proposal at Old Dominion University demonstrate the sociological underpinnings where sports, education, economics, and politics intersect in an anonymous forum where users can relay their opinion on the subject while remaining invisible and unidentified.
Yongjae Kim and Stephen Ross
This study examined the impact of repetitive sport video gaming on sport brand attitudes, attitude strength (e.g., attitude accessibility and confidence), and the attitude-behavior relationship. An experiment was designed to demonstrate the attitude-behavior consistency in a hypothetical choice context. The results indicated that repeated exposure to sport video games emulating a real-life sport influences sport attitude and its strength, and subsequently hypothetical choice behavior. The sport attitudes formed on virtual sport experience (e.g., playing sport video games repetitively) are as accessible and held with the same degree of confidence as those formed on direct experience (e.g., watching a sport on TV). The findings also confirmed the moderating effect of attitude confidence on the attitude-behavior relationship.
Robert Tibold, Gabor Fazekas and Jozsef Laczko
A three-dimensional (3-D) arm movement model is presented to simulate kinematic properties and muscle forces in reaching arm movements. Healthy subjects performed reaching movements repetitively either with or without a load in the hand. Joint coordinates were measured. Muscle moment arms, 3-D angular acceleration, and moment of inertias of arm segments were calculated to determine 3-D joint torques. Variances of hand position, arm configuration, and muscle activities were calculated. Ratios of movement variances observed in the two conditions (load versus without load) showed no differences for hand position and arm configuration variances. Virtual muscle force variances for all muscles except deltoid posterior and EMG variances for four muscles increased significantly by moving with the load. The greatly increased variances in muscle activity did not imply equally high increments in kinematic variances. We conclude that enhanced muscle cooperation through synergies helps to stabilize movement at the kinematic level when a load is added.