Abstract
The study of haptic perception and cognition requires data about how humans interact with tactile surfaces in the context of performing cognitive tasks. MIDAS is a set of three tools for the digital capture, coding, analysis, and interpretation of time-series, multitouch, interactive behaviors on a tactile surface. The MIDAS-logger uses the current screen technology of tablet computers to capture touches (up to ten fingers at high spatial and temporal resolution) through conventional tactile graphics that are overlaid on the screen. The MIDAS-analyser is a software program for the qualitative and quantitative analysis of MIDAS-logger touch data, which includes a fully interactive visualization of the data and a yoked display of a conventional simultaneous video recording made of the interactions. MIDAS-tactile protocol analysis (TPA) provides a scheme and a method to enable the rich coding and interpretation of tactile behaviors over multiple spatial and temporal scales. The efficacy of MIDAS was assessed against a set of criteria drawn from the successes and limitations of prior approaches to the study of tactile interactions. To demonstrate the functions of MIDAS, its three components were used to capture, analyze, code, and interpret the behavior of an experienced user and an inexperienced user of tactile graphics as they performed a shape-matching task.
Highlights
The study of haptic perception and cognition requires data about how humans interact with tactile surfaces in the context of performing cognitive tasks
Our interest is in methods to capture, code, and analyze tactile behaviors related to the cognitive science of tactile graphics—the human information processing involved in the reading and reasoning with tactile pictures and diagrams
Some investigations have been conducted with tactile graphics, notably Jehoel et al (2006) and McCallum et al (2006), as compared to studies with braille, relatively little is known about how tactile graphics are read
Summary
The study of haptic perception and cognition requires data about how humans interact with tactile surfaces in the context of performing cognitive tasks. MIDAS is a set of three tools for the digital capture, coding, analysis, and interpretation of timeseries, multitouch, interactive behaviors on a tactile surface. Our interest is in methods to capture, code, and analyze tactile behaviors related to the cognitive science of tactile graphics—the human information processing involved in the reading and reasoning with tactile pictures and diagrams. These are question that are fundamentally cognitive rather than perceptual in nature, because they involve recognition, search and comprehension processes beyond elementary detection and discrimination We argue such questions demand data and analysis spanning multiple spatial and temporal scales. MIDAS comprises tools and methods to address the challenges of capturing, coding and analyzing complex behaviors with 2-D tactile graphics. MIDAS provides tools and methods for both quantitative and qualitative analysis of that data, which span multiple spatial and temporal scales of tactile behaviors
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