Public Graduation Presentations Friday, August 26
Posted: 18 August 2016 03:19 PM
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You’re all invited to the Public Graduation Presentations of Maarten Lodewijk, Lise Stork, Jeroen van Oorschot, Danyi Liu, Manolis Fragkiadakis, Xander Bos, Marjolijn Ruijg, Brandi Rose, Paulina Kozlowska, Bardo Frings, Sophie Rust and Carolien Teunisse. 


Friday, August 26, 2016
Parallel sessions in Gravensteen Building room 0.11 and room 1.11, Pieterskerkhof 6, 2311 SR, Leiden


Schedule room 0.11
10.00 – 10.35 Maarten Lodewijk
10.45 – 11.20 Lise Stork
11.30 – 12.05 Jeroen van Oorschot
12.05 – 12.40 BREAK
12.40 – 13.15 Danyi Liu
13.25 – 14.00 NO PRESENTATION SCHEDULED
14.10 – 14.45 Manolis Fragkiadakis
14.45 - 14.55 BREAK
14.55 – 15.30 Xander Bos
15.40 – 16.15 Marjolijn Ruijg


Schedule room 1.11
10.45 – 11.20 Brandi Rose

11.30 – 12.05 Paulina Kozlowska
12.05 – 12.40 BREAK
12.40 – 13.15 NO PRESENTATION SCHEDULED

13.25 – 14.00 Bardo Frings

14.10 – 14.45 Sophie Rust
14.45 – 14.55 BREAK
14.55 – 15.30 Carolien Teunisse


Room 0.11:


10.00 – 10.35 Maarten Lodewijk
Title: “Being Superman: Effects of superhero embodiment in virtual reality on exertion capabilities”Abstract: Studies into Virtual Reality (VR) and embodied cognition reveal that VR is capable of altering one’s behavior, body schema and body image. This study aims to determine whether the particular trait of “super strength” commonly associated with superheroes can be induced in males by using Virtual Reality. Specifically, it is hypothesized that embodiment in the body of Superman through VR leads to increased exertion capabilities. In an affordance test, male participants were asked to estimate how long they thought they would be able to perform a planking exercise. They then had to perform this exercise for as long as possible. This was done three times: setting up the baseline, after being embodied in an Average Body (AB), and after being embodied in a Superman Body (SB). The order of the AB and SB conditions alternated per participant. Sense of presence was measured through a questionnaire after each condition. No significant effects that support the hypothesis were found within the affordance test results, but a significant relation in support of the hypothesis was found between average presence and the change score of SB Exertion. Further experimentation is needed in order to confirm this effect, see whether it exists in females, and to come to definitive conclusions about the effects of embodiment on exertion capabilities.
Thesis advisors: Maarten Lamers and Robin S. Rosenberg (Menlo Park, California)


10.45 – 11.20 Lise Stork
Title: “Assessing functional distortions in spatial mental representations using non-linear dimensionality reduction”
Abstract: This research focusses on the analysis of cognitive maps that are externalised via sketch maps. The information that is encoded in sketch maps holds information about spatial knowledge that is stored in memory. Participants in this study were asked to walk through a virtual environment. Afterwards they were subjected to a mapping exercise where they were required to draw the route while mentally ‘walking’ through the city. To analyse these sketch maps and possible distortions in spatial mental representations that are shared among participants, this study explores the effectiveness of a geometrical analysis of sketch map images. Assuming that the data of these sketch maps in pixel space have intrinsic dimensionality, we used algorithms to reduce the dimensionality non-linearly to be able to inspect and possibly interpret the underlying principal manifold and hopefully the intrinsic dimensionality of these sketch maps. By doing this we hope we will be able to retrieve more knowledge about the processing and storage of spatial knowledge and to possibly provide a tool for assessing in what way spatial information is stored in memory.
Thesis advisors: Maarten Lamers and Thomas Barkowksy (Universität Bremen)


11.30 – 12.05 Jeroen van Oorschot
Title: “Assessing aggression: a physical approach”
Abstract: While aggression has been studied by many disciplines and in many contexts, the bulk of the research tends to rely on self-report methods. There are numerous problems associated with these methods when applied in contexts where social desirability can introduce a bias, such as aggression research. We briefly outline these problems and propose a new research method for aggression research in an attempt to circumvent them, by measuring how people punch a device under different stimuli. The technical development of the device is detailed and the method is tested in a case-study on gender aggression. We conclude that the method is under certain circumstances potentially superior to commonly used methods as the findings contradict the literature. Various considerations and reflections on implementing the method are provided.
Thesis advisors: Maarten Lamers and Ricardo Cachucho


12.05 – 12.40 BREAK

 

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Posted: 18 August 2016 03:32 PM   [ # 1 ]
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Room 0.11:


12.40 – 13.15 Danyi Liu
Title:Navigation in an Audio Maze Game with a Quadraphonic and Octophonic Speaker Set-Up
Abstract: Sound spatialization techniques allow for the reproduction of the position and movement of virtual sound sources. We have researched the possibility of navigating a virtual environment that is solely represented by sound. In our study, we have chosen amplitude panning of sound sources between the speakers as the main spatialization technique for positioning. We have developed test based on a prototype of an audio maze game and compare the navigational ability of the participants using a quadraphonic and an octophonic speaker set-up. In the experiment 50 percent of the participants start with the quadraphonic setup and play with the octophonic setup afterwards and the other 50 percent start with the octophonic setup. By statistically analyzing the measured performance of each individual, we look for differences in navigational ability between the two speaker setups.
Thesis advisors: Edwin van der Heide and Fons Verbeek


13.25 – 14.00 NO PRESENTATION SCHEDULED


14.10 – 14.45 Manolis Fragkiadakis
Title: “Influence of Surround Sound on Visual Fixations During Voluntary Video Viewing”
Abstract: Studies have shown that gaze behavior is affected by visual features such as motion, brightness and contrast. In addition, it has been assumed that monophonic sound can also affect the allocation of gaze. However, surround sound has not been considered as a possible factor that can influence eye behavior in dynamic scenes. In this study we investigated the influence of surround sound on eye movements during voluntary video viewing. We recorded the eye movements and in particular the fixations of 21 participants during videos of outdoor scenes with monophonic and surround sound respectively. The results showed that, in general, fixations with surround sound were clustered at approximately 130 pixels away from the ones with monophonic sound. Furthermore, in moments when there were moving objects appearing in a scene, the sound condition modulated the allocation of gaze the most. Finally, the locations of the clusters of multiple participants are significantly dependent on the location of the active speaker.
Thesis advisors:  Maarten Lamers and Bernhard Hommel (Leiden Institute for Brain and Cognition)


14.45 - 14.55 BREAK


14.55 – 15.30 Xander Bos
Title: “Computer assisted brainstorming: which ideation tool is the best and why?”
Abstract: The purpose of this study is to determine which ideation software, referred to as tools, is the one best available and why this is the case. After analysing 83 different tools, a selection of four tools is made. A fifth tool is developed specifically for this research, with the goal of testing the effectiveness of having a dynamic type of word database, as the four selected tools all rely on static types of word databases. An experiment is then performed with 31 participants, using a specifically designed method for this study and a method based on four well-known characteristics that describe the quality of ideas created through brainstorming methods. The results of the experiment show that a static type of database, focussed on specific category, in combination with random selection offer the best ideas.
Thesis supervisors: Maarten Lamers and Peter van der Putten


15.40 – 16.15 Marjolijn Ruijg
Title: “Does the Data Doppelgänger Reside in The Uncanny Valley?”
Abstract: Data accumulation by (self-)tracking creates a new type of identity that mirrors, resembles, reflects, mediates and interacts with the user being tracked (data doppelgänger). This paper uses textual analysis and an empirical study to discuss whether the ‘uncanny’ emerges when our data doppelgänger doesn’t resemble our understanding of ourselves. Furthermore it examines what kind of conditions are required in order to (not) let the uncanny (valley) emerge in real-time data-driven storytelling for mobile devices in the case that the main character of the narrative is the data double of the reader.
Thesis supervisors: Peter van der Putten and Gabriele Ferri (Hogeschool van Amsterdam)

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Posted: 18 August 2016 03:42 PM   [ # 2 ]
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Room 1.11


10.45 – 11.20 Brandi Rose
Title: “Does motivation play a role in Dunbar’s number? A new perspective into the limitations of social network sizes.”
Abstract: The social brain hypothesis predicts that normal adult humans have a natural social network size of around 150, which is known as Dunbar’s number. It is predicted that humans can not maintain more than 150 relationships at any one time due to constraints of cognitive limitations and time. These limitations affect the quality of relationships and thus the social network size. Technology could be used to loosen these constraints, but so far there has been no supporting evidence that its use affects social network size. Could there be another factor to this equation? How motivated are people to get in touch with their friends? A pilot study was performed whereby participants took part in a week long study scoring their motivation to contact their friends, provided their social network sizes, and were evaluated on their ability to handle multi-level intentionality tasks (theory of mind) in an investigation into correlations between motivation, social network sizes, and theory of mind capabilities.
Thesis supervisors: Max van Duijn and Wouter Wolf (VU University Amsterdam)


11.30 – 12.05 Paulina Kozlowska
Title: “How the use of visual communication influences understanding: An insight into the use of the Dutch government form by non-native speakers.”
Abstract: The research investigates whether using visual modalities of communication, knowledge visualisation and information design techniques can make an official form easier to understand for its users. Specifically, it focuses on a particular group of migrants in the Netherlands who often do not speak the Dutch language proficiently. The participants are divided into two groups: a visual tool is developed and tested on one group of users, and textual guide is tested on a control group. All participants fill in a Dutch tax return form based on a fictional scenario and then respond series of questions in the in-depth interview. The research objective is to examine the following matters: to what extent the visual help can overcome the lack of foreign language skills? Are non-textual modalities enough to provide a clear understanding of a message? What kind of visualisation is more successful than others?
Thesis supervisors: Max van Duijn and Helena Haapio (University of Vaasa)


12.05 – 12.40 BREAK


12.40 – 13.15 NO PRESENTATION SCHEDULED


13.25 – 14.00 Bardo Frings
Title: “Radio-Frequency Electromagnetic Fields Produced by Wireless Technologies Actually Might Do Cause Adverse Health Effects. What now?Abstract: In this paper we will suggest there is sufficient amount of evidence from a wide variety of research showing an association between non-thermal radio-frequency electromagnetic fields and adverse health effects. Given the increasing reliance of society on wireless technologies, the possible wide-reaching implications of the scientific confirmation of biological effects produced by non-thermal electromagnetic fields are discussed in the second part of this paper.
Thesis supervisors: Jaap van den Herik and Max van Duijn


14.10 – 14.45 Sophie Rust
Title: “Smoothened emotions: The effect of (digital) Botox on communication”
Abstract: Using Botox is an increasingly popular way to prevent facial wrinkles. An effect of Botox however, is that one’s facial expression becomes less expressive. The aim of this research is to investigate if this effect is influencing communication between Botox users and non Botox users. For this research two stories are communicated by a series of video messages whereby one group is shown video footage that has been digitally manipulated to remove the frown wrinkles. To reinforce the effects, the stories are retold twice to two generations of test subjects. The final generation is analysed in communication loss relative to the original story. The outcomes show no statistical significance for the first story between Botox users and non users, but show significance for the variable ‘intended meaning’ and ‘emotion’, each in one of the sub-plots. This might indicate that less facial expression causes less transfer of emotions. 
Thesis supervisors: Max van Duijn and Maikel Scheer (cosmetic medical specialist)


14.45 - 14.55 BREAK

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Posted: 18 August 2016 03:45 PM   [ # 3 ]
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Room 1.11


14.55 – 15.30 Carolien Teunisse
Title: “CloseHR: an experimental study on the effects of interpersonal touch on the sense of presence in an immersive Hybrid Environment”
Abstract: The possibility to experience a multi-user immersive Hybrid Environment (HE) is becoming accessible to a wider group of researchers, artists and developers due to low-cost consumer VR technology and a growing community of open-source software users and developers.  An important measure to indicate if an immersive environment is successful is the sense of presence which can be described as a feeling of really being in the mediated environment, or as a psychological state in which virtual objects are experienced as actual objects. To measure the sense of presence we developed an interactive art installation called CloseHR. The system consists out of a 3D representation of the environment the users are physically in, 3D representations of their bodies mapped to be visually correct in first person view, and virtual objects the users can interact with. By touching each other’s hands, physically and/or virtually, the users could break down a wall standing in between them. Next to qualitative data collection we used a questionnaire and a within subject design research method to answer the question: Does interpersonal human touch affect our sense of presence in an immersive Hybrid Environment? The results did not show a significant effect of interpersonal touch on presence, but we did discover a positive effect of interpersonal touch on the sense of embodiment. With the findings presented in this paper we are able to get a better understanding of the interesting and complex construction of the sense of presence and related processes in a multi-user HE.
Thesis supervisors: Edwin van der Heide and Anouk Keizer (Utrecht University)

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