Abstract and Figures

This work aimed at expanding thearchitecture of WhatsOnWeb [Di Giacomo et al., 2005] following accessibility and usability state-of-the-art criteria. WoW is a visual Web search engine that conveys the indexed dataset using graph-drawing methods on semantically clustered data. In previous studies [Federici et al., forthcoming; Federici et al., 2008], we found that top-down representation of the most widespread search engines does not take into account the level of accessibility of information, and this ranking highlights the distance between the quantitative order of Web Popularity (WP) and the qualitative level of accessibility of the retrieved information. Conversely, WoW semantically analyzes the search results, and automatically links them in a network of concepts and sub-concepts. The whole information retrieved is presented to the user simultaneously in a interactive visual map, overcoming the gap between quantitative order and qualitative level of information. The redesigning process of WoW has been performed by following the user-centered design methodology and in compliance with the WCAG 1.0. This way, we implemented a sonification algorithm that converts data relations and their spatial coordinates in non-speech sounds (sonification). With WhatsOnWeb we aim at providing an autonomous assistive technology tool that allows for an independent navigation, based on both an integrated synthesizer for screen reading and a sonification system, by which conveying geometrical-spatial information representation. The result is an innovative web search and resulttargeting approach, that also reduces the gap between quantitative and qualitative result ranking, as seen on major web search platforms.
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EXTENDED ABSTRACT
A visual sonificated web search clustering engine
Alessio Rugo ÆMaria Laura Mele ÆGiuseppe Liotta Æ
Francesco Trotta ÆEmilio Di Giacomo Æ
Simone Borsci ÆStefano Federici
ÓMarta Olivetti Belardinelli and Springer-Verlag 2009
Introduction
Information Visualization is a widespread approach of the
Information and Communication Technologies, and it
facilitates the manipulation of abstract information by
representing it by geometric models. It has been shown that
spatial representation can be independent by the sensorial
way in which it is perceived (Avraamides et al. 2004;
De Vega et al. 2001), leading to the hypothesis of an
amodal spatial representation (Bryant 1992).
In light of these studies, an important alternative to
Information Visualization methods appears to be the
Sonification approach, an information representation
method (Olivetti Belardinelli et al. 2009) that implements
non-speech audio information to ‘‘represent data relations
into perceived relations in an acoustic signal for the pur-
poses of facilitating communication and interpretation’’
(Kramer et al. 1997). The main focus of the sonification
approach is on the interactivity between the user and the
data representation, since it allows user to manipulate
complex data and their inner relations in a dynamic way.
Currently, the information representation techniques of
main search engines are based on a top-down hierarchic
order, according to quantitative indexes of ranking. In a
recent study (Borsci et al. 2008; Federici et al. 2009), it has
been shown that high ranking values of web popularity
(WP) do not match with high levels of accessibility. The
top-down output of search engines leads users to assign a
qualitative value to the hierarchy organization based on
WP, although it is calculated without considering quality
indexes (i.e., accessibility). Moreover, Andronico et al.
highlighted the lack of qualitative ratings on WP, showing
that the main search engines do not comply with W3C
accessibility guidelines (Andronico et al. 2008). In this
study, we aim to describe the redesign process of What-
sOnWeb (WoW) (Di Giacomo et al. 2007,2008), a visual
graph based search engine implemented by the Department
of Electronic and Information Engineering of the Univer-
sity of Perugia. WoW is an autonomous application able to
order indexed Web data using semantic nodes in a single
page network diagram. In this way, WoW overcomes the
page scrolling normally required by the reports of the tra-
ditional search engines (Search Engines Report Page),
overpassing the limits of traditional Web information rep-
resentation methods pointed out by Borsci et al. (2008).
Methods
The redesign of WoW has been conceived by adopting the
user-centered design (UCD) methodology. With WoW, we
aim to provide a universal online or standalone search
engine by which it could be possible to find information in
A. Rugo (&)G. Liotta F. Trotta E. Di Giacomo
DIEI Department of Electronic and Information Engineering,
University of Perugia, Perugia, IT, Italy
e-mail: alessio.rugo@gmail.com
M. L. Mele S. Federici
CIRID Interdisciplinary Research Centre on Disability
and Technologies for Autonomy,
‘Sapienza’ University of Rome, Rome, Italy
S. Borsci S. Federici
ECoNA Interuniversity Centre for Research on Cognitive
Processing in Natural and Artificial Systems,
‘Sapienza’ University of Rome, Rome, Italy
S. Federici
Department of Human and Education Sciences,
University of Perugia, Perugia, Italy
123
Cogn Process (2009) 10 (Suppl 2):S286–S289
DOI 10.1007/s10339-009-0317-4
an effective, efficient and satisfying way. We present the
main steps of our project as follows.
1. Reengineering the architecture of WhatsOnWeb.
1
Currently, in either accessibility rules and guidelines
it is not specified how to reengineer the architecture of
java environments in an accessible way; therefore, we
adopted the international Java guidelines provided by
IBM and Sun, the Java Libraries Java Accessibility
Utilities and the Java Accessibility Bridge. Moreover,
we used an automatic evaluator system called RAVEn
(rule-based accessibility validation environment), an
Eclipse tool for inspecting Java
TM
-based and validat-
ing them for accessibility.
2
We aim to allow users to
interact with the WoW interface by using any kind of
assistive technology, and we also provide an autono-
mous internal synthesizer Java Speech compliant to
support users if there is no installed screen reader.
2. We focus on information representation for blind
people devising effective ways of interacting with the
system by translating the visualization into sounds.
Sonification is the way to ‘‘represent data relations into
perceived relations in an acoustic signal for the
purposes of facilitating communication and interpre-
tation’’ (Kramer et al. 1997). Among the several
sonification methods proposed in the last years, we
adopted the action-by-design-component (ADC)
framework proposed by Zhao (Zhao et al. 2008), that
provides a newsworthy guideline on how to represent
complex information ‘‘that does not have any obvious
physical space to map to’’ (Card et al. 1990).
3. Extending the WoW ranking algorithm to the W3C
accessibility indexes. WoW retrieves information by
using the WP indexes provided by Google
TM
, as most
search engines do. However, the WP index is based on
an algorithm that does not include the accessibility
factor among the indexing components.
4. Performing a set of evaluation activities to demonstrate
the effectiveness of the approach for visually impaired
people. WoW ‘‘integrates new graph visualization
algorithms that are engineered versions of existing
graph drawing algorithms and introduces a novel
visual strategy for exploring clustered graphs’
(Di Giacomo and Didimo 2008). Currently, sighted
users can interact with four different layouts: Tree-
Map, Layered, Radial, and Orthogonal (see Fig. 1): the
navigation features of the algorithm are independent
from the choice of the layout. In this step, we aim to
analyze the usability of the proposed sonification
system, supervising the interaction of sighted people
with the sonificated layouts.
Results
Activities (1) and (2) are completed. Each phase of the
redesigning process has been consistent to the UCD
methodology.
First, the decoupling between algorithm and interface
has been implemented. At the same time, we analyzed the
accessibility of the Java code by using a dedicated evalu-
ation software called RAVEn. The pre-existing code has
been reengineered to facilitate the accessibility interven-
tions according to the guidelines provided by Sun and IBM.
We developed a composed architecture to permit interac-
tion by any kind of assistive technology; moreover, WoW
is equipped with an autonomous internal screen reader
which permits to vocalize data even in the absence of a pre-
installed screen reader software.
Second, we implemented the sonification of the visual
map, designed according to the ADC framework (Zhao
et al. 2008). Different innovative sonification models have
been experimented, mapping both spatial information and
application data. For example, in the PanAndPitchScore
sonification algorithm the search result graph has been
mapped as a musical score, where node vertical position
corresponds to note frequency and the horizontal to playing
time. Anyway, the most appreciated sonification algo-
rithms are those which use ‘‘genuine’’ mapping elements:
note frequency to map the yaxis, pan-potting for the xaxis
and the redundant volume information to characterize the
distance of the current focused element. For other appli-
cation information such as ranking, node type, graph level,
other sound features have been used: sound blinking, tim-
bre, chord and so on.
The ingenuity of the spatial mapping enabled an intui-
tive approach in our application, since no training is needed
to understand the consistent geometrical patterns used to
draw the search result graph.
Conclusions
The focus of this extensive experimental analysis is on the
impact that these novel interfaces will have on the cogni-
tive processes of the users. Currently, we completed both
reengineering and sonification phases. The architecture of
WoW has been reengineered by following the UCD
methodology and the W3C guidelines. It has been made
compliant with any kind of screen reader and also has an
internal autonomous synthesizer. Moreover, WoW
1
WhatsOnWeb: http://whatsonweb.diei.unipg.it:8080/wow3.2.
2
http://www.alphaworks.ibm.com/tech/raven.
Cogn Process (2009) 10 (Suppl 2):S286–S289 S287
123
implemented the sonification of visual maps, designed
according to the ADC framework (Zhao et al. 2008). The
sonification allows the exploration of the concepts network
to be driven by a sound feedback system that represents the
spatial information. The expandable underlying software
architecture may be fully customized to match the user’s
auditory sensibility and preferences, as well as the possi-
bility for the researchers to use the existing platform to
develop new algorithm or modify the actual set. Con-
cerning the (3), extending of the WOW ranking algorithm
to the W3C accessibility indexes, we are working on the
current ranking algorithm of WOW, based only on the WP
index provided by Google
TM
, to take into consideration the
accessibility of the results. Finally, we have designed the
experimental settings for the analysis object of activity (4)
consisting in users’ accessibility and usability evaluations,
in order to assess the distance among the model of
designers and users, and the system image (Norman 1990).
Next step of our project will be to fulfill activities (3) and
(4). The reengineering of WoW will be completed by
implementing and setting in action the new ranking algo-
rithm of WoW. The effectiveness of the reengineered
system for the blind people will be then evaluated
according to the designed experimental settings.
References
Andronico P, Buzzi M, Leporini B (2008). ‘‘Can I find what I’m
looking for?’’. Thirteenth international World Wide Web
conference on Alternate track, New York, NY, USA, ACM,
pp 430–431
Avraamides M, Loomis J, Klatzky RL, Golledge RG (2004)
Functional equivalence of spatial representations derived from
vision and language: Evidence from allocentric judgments. J Exp
Psychol Hum Learn Mem Cogn 30:801–814
Borsci S, Federici S, Mele ML, Stamerra G (2008) Global rank:
improving a qualitative and inclusive level of web accessibility’’.
Conference on 4th biennial Disability Studies Conference.
Lancaster University press, Lancaster, p 9
Fig. 1 Search result layout: aradial, borthogonal, clayered, dtreemap
S288 Cogn Process (2009) 10 (Suppl 2):S286–S289
123
Bryant DJ (1992) A spatial representation system in humans.
Psycholoquy 3 (16) Conference ACM Southeast Regional
Conference
Card S, Mackinlay JD, Robertson G (1990) The design space of input
devices. Proceedings of the ACM SIGCHI conference on human
factors in computing systems, pp 117–124, Association for
Computing Machinery, New York
De Vega M, Cocude M, Denis M, Rodrigo MJ, Zimmer H (2001) The
interface between language and visuo-spatial representations. In:
Denis M et al (eds) Imagery, language and visuo-spatial
thinking. Psychology Press, London, pp 109–136
Di Giacomo E, Didimo W, Grilli L, Liotta G (2007) Graph
visualization techniques for web meta-search clustering engines.
IEEE Trans Vis Comput Graph 13(2):294–304
Di Giacomo E, Didimo W, Grilli L, Liotta G, Palladino P (2008)
WhatsOnWeb?, an enhanced visual search clustering engine.
In: Proceedings of the IEEE PacificVis 2008, pp 167–174
Federici S, Borsci S, Mele ML, Stamerra G (2008) Global Rank: tra
popolarita
`e qualita
`dei siti Web. Psicotech 6(1):7–23
Federici S, Borsci S, Mele ML, Stamerra G (2009) Web popularity:
an illusory perception of a qualitative order in information.
Universal Access in the Information Society (accepted for
publication on 28th May 2009)
Kramer G, Walker B, Bonebright TP, Cook J, Flowers N, Miner J
(1997) Sonification report: status of the field and research
agenda. National Science Foundation, Georgia
Norman AD (1990) The design of everyday things. Doubleday, New
York
Olivetti Belardinelli M, Federici S, Delogu F, Palmiero M (2009)
Sonification of spatial information: audio-tactile exploration
strategies by normal and blind subjects. In: Stephanidis C (ed)
Universal access in HCI, Part II, HCII 2009, LNCS 5615.
Springer, Berlin, pp 557–563
Zhao H, Plaisant C, Shneiderman B, Lazar J (2008) Data sonification
for users with visual impairment: a case study with georefer-
enced data. ACM Trans Comput Hum Interact 15(1):1–28
Cogn Process (2009) 10 (Suppl 2):S286–S289 S289
123
... Nodes are related to each other by edges representing their semantic relations.Figure 1 et al., 2007). We used the ADC model to design and test a sonification layout of the accessible visual version of WoW presented in 2009 (MELE et al., 2009; RUGO et al., 2009) to transmit the spatial and semantic information of graphical features and their combinations in an acoustic non-verbal way. We applied the sonification process by combining visual and non-verbal acoustic features in a univocal way.Table 1 shows three different sonification layouts developed by using different combinations of tone, pitch, volume, blinking and grid reference with the z axis representing the spatial position of the graphic objects of WoW, the web ranking of each node, the level of navigation and the type of node. ...
... Nodes are related to each other by edges representing their semantic relations.Figure 1 et al., 2007). We used the ADC model to design and test a sonification layout of the accessible visual version of WoW presented in 2009 (MELE et al., 2009; RUGO et al., 2009) to transmit the spatial and semantic information of graphical features and their combinations in an acoustic non-verbal way. We applied the sonification process by combining visual and non-verbal acoustic features in a univocal way.Table 1 shows three different sonification layouts developed by using different combinations of tone, pitch, volume, blinking and grid reference with the z axis representing the spatial position of the graphic objects of WoW, the web ranking of each node, the level of navigation and the type of node. ...
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... The sonificated version of WhatsOnWeb has been tested on blind and sighted users using the Partial Concurrent Thinking Aloud technique , an evaluation protocol that overcomes the limitations of concurrent and the retrospective verbal protocols for evaluations involving blind users. In this usability study, blind subjects performed better at identifying errors of interaction than sighted people at a task involving spatial exploration guided only by auditory cues Rugo et al., 2009). By making it easier for users with disabilities to map the elements in the interface, sonification significantly improves the accessibility and usability of web interfaces (Mele, Federici, Borsci, and Liotta, 2010). ...
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... The sonification model Action by Design Component (ADC) provides users with a dynamic interaction acoustic interface (ZHAO et al., 2007). We used the ADC model to design and test a sonification layout of the accessible visual version of WoW presented in 2009RUGO et al., 2009) to transmit the spatial and semantic information of graphical features and their combinations in an acoustic non-verbal way. We applied the sonification process by combining visual and non-verbal acoustic features in a univocal way. ...
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Posted 05/23/1992. Reviews evidence for the functional equivalence of spatial representations of observed environments and environments described in discourse. It is argued that people possess a spatial representation system that constructs mental spatial models on the basis of perceptual and linguistic information. Evidence for a distinct spatial system is reviewed. (PsycINFO Database Record (c) 2012 APA, all rights reserved)