Detailansicht

Detection response tasks

a new method to measure cognitive workload

Juliane Schäfer

Art der Arbeit

Diplomarbeit

Universität

Universität Wien

Fakultät

Fakultät für Psychologie

Betreuer*in

Helmut Leder

Volltext herunterladen
Volltext in Browser öffnen

DOI

10.25365/thesis.20829

URN

urn:nbn:at:at-ubw:1-29137.48013.536559-0

Link zu u:search

(Print-Exemplar eventuell in Bibliothek verfügbar)

Abstracts

Abstract

(Deutsch)

Currently, many new in-vehicle information and communication systems are entering our cars. They range from media players to navigation systems to speech based systems which allow the use of the vehicles functions by speech. While these systems are intended to facilitate the driving task, some research shows they also may also have the potential to distract drivers (e.g. Santos et al., 2005). In order to evaluate to which degree such systems are suitable for the while driving, many evaluation methods have been proposed. While most of these evaluation methods allow the measurement of visual-manual distraction (e.g. eye tracking), cognitive distraction is much more complicated to measure. However, as more systems become multi-modal or purely speech-based, it is getting even more important to measure the impact of cognitive distractions. Recent studies (Merat & Jamson, 2008) explored a promising method to evaluate cognitive workload: detection response tasks (DRTs). Such detection response tasks rely on at least a dual task setting, where the impairment in a secondary task (the detection response task) is an indication of the workload imposed by the primary task. In this study three types of DRTs were evaluated: peripheral detection response task (PDRT), auditory detection response task (ADRT) and tactile detection response task (TDRT). In order to evaluate the sensitivity of each of these DRTs, cognitive tasks like the n-back task (Mehler et al., 2009) and a counting task were deployed in two levels of difficulty. Additionally, these cognitive tasks were presented in a visual, auditory, as well as pure cognitive way to clarify if any interactions between the different modalities of the DRTs and the presentation modes of the cognitive tasks exist. Results revealed significant differences between high and low levels of cognitive workload for all three types of the DRT variants evaluating the reaction time. However, a closer examination of the results showed that the PDRT is not adequately sensitive to measure increased cognitive workload on the counting task if the dependent measure is the hit rate. It is concluded that all three DRT variants are a sensitive measurement technique to assess cognitive workload. More research is needed to validate these findings on the use of real world tasks. Furthermore it has to be proven if it is possible to apply one of the DRT variants to a tertiary design (driving + test task + DRT), as this would increase the ecological validity of the method.

Autor*innen

Juliane Schäfer

Haupttitel (Englisch)

Detection response tasks

Hauptuntertitel (Englisch)

a new method to measure cognitive workload

Paralleltitel (Deutsch)

Detection Response Tasks ; eine neue Messmethode zur Erfassung von kognitiver Beanspruchung

Publikationsjahr

2012

Umfangsangabe

66 S. : Ill., graph. Darst.

Sprache

Englisch

Beurteiler*in

Helmut Leder

Klassifikation

77 Psychologie > 77.93 Angewandte Psychologie

AC Nummer

AC09569711

Utheses ID

18625

Studienkennzahl

UA | 298 | | |

Detailansicht

Abstracts

Schlagwörter