Elif Özcan

The effect of visual context on the identification of ambiguous environmental sounds

The influence of the specificity of the visual context on the identification of environmental sounds (i.e., product sounds) was investigated. Two different visual context types (i.e., scene and object contexts)-which varied in the specificity of the semantic information-and a control condition (meaningless images) were employed. A contextual priming paradigm was used. Identification accuracy and response times were determined in two context conditions and one control condition. The results suggest that visual context has a positive effect on sound identification. In addition, two types of product sounds (location-specific and event-specific sounds) were observed which exhibited different sensitivities to scene and object contexts. Furthermore, the results suggest that conceptual interactions exist between an object and a context that do not share the same perceptual domain. Therefore, context should be regarded as a network of conceptually associated items in memory.

Designing and Deploying Meaningful Auditory Alarms for Control Systems

In the old days, spacecraft alarming notifications to operators were directed, upon arrival to ground, to one of those needle printers. Trained operators could tell, from the length and rhythm of the printer noise, what kind of alarm it was and therefore infer the criticality or the subject. Today, in monitoring and control systems (MCS) currently in use at the European Space Agency (ESA), there is no care to convey information in the sounds, and these alarm sounds have not been systematically designed to indicate the type of system failure and further elicit the desired and accurate operator response. Operators depend heavily on the graphical interfaces in order to pinpoint the source of alarm sounds (see Fig. 1) which further creates cognitive load. Similarly, switching cost from auditory perception to visual perception while finding the source of the information is undesirable when time can be a precious commodity for operators when monitoring valuable spacecraft. Therefore, ESA teamed up with Delft University of Technology and Plymouth University in order to investigate and design a new auditory display for the control rooms located in the European Space Operations Centre (ESOC), in Darmstadt, Germany

Long-Term Goals or Immediate Desires? Introducing a Toolset for Designing with Self-Control Dilemmas

Abstract This paper suggests that designers can frame user behaviour in terms of the conflicts between long-term goals and immediate desires (i.e. self-control dilemmas), and address these conflicts by facilitating the pursuit of long-term goals. A phenomenological study provided an understanding of self-control dilemmas and the strategies people use to deal with these dilemmas. Based on this understanding, this paper proposes a framework for analysing self-control dilemmas and three supporting design strategies. The framework can act as an analysis tool when distinguishing between long-term goals and immediate desires, and the design strategies can facilitate generation of ideas that can address self-control dilemmas. Understanding these human principles offers novel opportunities for products, services, or policies that contribute to subjective well-being.

From teatime cookies to rain-pants: resolving dilemmas through design using concerns at three abstraction levels

Abstract Users often have conflicting concerns (i.e., dilemmas), such as ‘embracing change vs. following tradition.’ Design can resolve these dilemmas through simultaneously fulfilling conflicting user concerns. This paper proposes three abstraction levels for framing user concerns when formulating dilemmas. In a large-scale industry project, we identified that dilemmas can be formulated and resolved at different abstraction levels. Based on these preliminary findings, we developed a structured way to formulate dilemmas, which involves using three different types of concerns (i.e., product-, activity-, and identity-focused concerns). In this framework, product-focused concerns represent the most concrete concern level and identity-focused concerns represent the most abstract level. Sixty master-level design students were asked to formulate a dilemma evoked by a product of their own choice and to create design ideas to resolve this dilemma. The results showed that dilemmas involving all concern levels can be an input for ideation, with the ‘most abstract yet informative’ dilemma being the most inspiring. In addition, we found that design can resolve dilemmas in several distinct ways, where each dilemma-resolving strategy comes with opportunities and challenges. Consciously formulating and examining alternative dilemma formulations can create opportunities that might otherwise not be considered as input for ideation.

Getting Better Hospital Alarm Sounds Into a Global Standard

The reserved set of audible alarm signals embodied within the global medical device safety standard, IEC 60601-1-8, is known to be problematic and in need of updating. The current alarm signals are not only suboptimal, but there is also little evidence beyond learnability (which is known to be poor) that demonstrates their performance in realistic and representative clinical environments. In this article, we describe the process of first designing and then testing potential replacement audible alarm signals for IEC 60601-1-8, starting with the design of several sets of candidate sounds and initial tests on learnability and localizability, followed by testing in simulated clinical environments. We demonstrate that in all tests, the alarm signals selected for further development significantly outperform the current alarm signals. We describe the process of collecting considerably more data on the performance of the new sounds than exists for the current sounds, which ultimately will be of use to end users. We also reflect on the process and practice of working with the relevant committees and other practical issues beyond the science, which also need constant attention if the alarms we have developed are to be included successfully in an updated version of the standard.