Matlab and eye-tracking: Applications in psychophysics and basic psychological processes

Abstract

This article aims to demonstrate the utilities of Matlab (MATrix LABoratory) and eye-tracker for research in psychophysics and basic processes. We fi rst introduce its origin, functioning, and advantages over other programs, and then we review different applications of Matlab in psychophysical tests involving eye-trackers. As an example, we present the development of a psychophysical test involving eye-tracker and Matlab, showing its ability to communicate and interact with other devices and programming languages. Finally, we emphasize the advantages and diffi culties of working with Matlab.Keywords: Psychophysics, Matlab, Eye-tracker, technological innovation. Matlab e Rastreamento Ocular: Aplicações em Psicofísica e Processos Psicológicos Básicos ResumoEsse artigo teve como objetivo demonstrar a funcionalidade e capacidade do Matlab (MATrix LABoratory) e rastreamento de movimentos oculares (eye-tracker) para pesquisas em psicofísica e processos básicos. Para isso é apresentado primeiramente os fundamentos da criação e funcionamento do Matlab e suas vantagens sobre outros softwares. Em seguida são apresentadas diferentes aplicações do Matlab em testes psicofísicos com rastreadores de movimentos oculares (eyetracker). Também é apresentada a criação de um teste psicofísico em Matlab para um eyetracker e sua capacidade de se

Effects of acute alcohol ingestion on eye movements and cognition: A double-blind, placebo-controlled study

“…In the literature on this theme, for instance, no studies on eye tracking that use a visual task similar to the visual maze used in this study are found. Considering the results obtained, the Visual Maze Test demonstrates that it is an efficient task for evaluating visual information processing, resistant regarding psychosocial and individual factors, and is in line with a previous study in which this test is described [40]. However, additional studies that use this test are needed.…”

“…Eye movements were recorded through a binocular, 300 Hz, Tobii eye tracker, attached to a 23” monitor (1920 x 1080 pixel maximum resolution and 300 cd/m 2 max luminance) on which the Visual Maze Test (70,42 cd/m 2 luminance) [40] was presented for the participants to visualize. The system, integrated into a Dell Latitude 3450 notebook with a 14" HD monitor (1366 x 768) and Windows 8.1 Pro 64 bit operational system, Intel Core i7-5500U 2.4 GHz processor, and 8 GB RAM memory, was used to monitor the test.…”

“…This task was developed by Santos, Campos Neto, Sousa, Pessoa, and Nogueira [40] in the Perception, Neuroscience, and Behavior Laboratory of the Federal University of Paraíba. This test shows areas that, which in a brief period of time, it must be decided which path to follow (decision points).…”

“…This test is a relatively simple task, which is shown to be more resistant to psychosocial factors and individual differences. For example, educational level is often a significant factor in neuro-cognitive tests that require the recognition of numbers or letters [40]. …”

Percepção Visual no Tremor Essencial: Uma Revisão Sistemática

“…Através das avaliações psicofísicas, pesquisadores desenvolveram testes de avaliação da percepção visual através de imagens acromáticas e acromáticas. Todavia, técnicas eletrofisiológicas e de rastreamento do movimento ocular são baseadas em novas tecnologias que também permitem uma descrição apurada da apresentação do estímulo, registro, sincronização e análise (Santos et al, 2014).…”