Integrated electromyogram and eye-gaze tracking cursor control system for computer users with motor disabilities

This research pursued the conceptualization, implementation, and testing of a system that allows for computer cursor control without requiring hand movement. The target user group for this system are individuals who are unable to use their hands because of spinal dysfunction or other afflictions. The system inputs consisted of electromyogram (EMG) signals from muscles in the face and point-of-gaze coordinates produced by an eye-gaze tracking (EGT) system. Each input was processed by an algorithm that produced its own cursor update information. These algorithm outputs were fused to produce an effective and efficient cursor control. Experiments were conducted to compare the performance of EMG/EGT, EGT-only, and mouse cursor controls. The experiments revealed that, although EMG/ EGT control was slower than EGT-only and mouse control, it effectively controlled the cursor without a spatial accuracy limitation and also facilitated a reliable click operation

Spanish adaptation of ctai-2d. tool forassessing the trait anxiety in athletes

Trait-Anxiety is a dispositional and stable measure whose evaluation is relevant in the sporting context as the way in which athlete's interpret feelings of anxiety is relevant to competitive performance. The purpose of the present study was to adapt the Competitive Trait Anxiety Inventory (CTAI-2D) into Spanish through a sample of 421 athletes (66.3% men and 33.7% women) aged between 18 and 46 years (mean = 21.16). Firstly, the CTAI-2D was translated. This was then followed by exploratory factor analysis (EFA) and examination of convergent validity. Finally, confirmatory factor analysis (CFA) was performed. EFA outcomes showed an explained variance of 52.95% for the intensity dimension and 55.55% for valence/direction, whilst CFA produced satisfactory fit indices. The CTAI-2D is a valid and reliable instrument for evaluating trait anxiety. It describes athlete's perceptions of anxiety intensity and whether anxiety is interpreted as an obstacle or facilitator.La Ansiedad-Rasgo es una medida disposicional y estable, siendo en el contexto deportivo relevante su evaluación, por la interpretación que realiza el deportista de sus sensaciones ansiosas para el rendimiento competitivo. El propósito ha sido la adaptación al español del Competitive Trait Anxiety Inventory (CTAI-2D), en 421 deportistas (66.3% hombres y 33.7% mujeres) con edades entre los 18 y 46 años (Medad = 21.16). En primer lugar, se efectuó la traducción del CTAI-2D, junto con el análisis factorial exploratorio (AFE) y validez convergente; y, en segundo lugar, se realizó el análisis factorial confirmatorio (AFC). El AFE ha mostrado una varianza explicada del 52.95% para la dimensión intensidad y 55.55% para valencia/dirección; mientras el AFC muestra índices de ajuste satisfactorios. El CTAI-2D es un instrumento para evaluar el rasgo,válido y fiable, aportando la percepción del deportista acerca de la intensidad de la ansiedad y la interpretación como obstaculizadora o facilitador

users with refractive

Image pre-compensation to facilitate computer access fo