USING VGI IN DESIGN FOR ONLINE USABILITY
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USING VGI IN DESIGN FOR ONLINE USABILITY

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Amateur Volunteered Geographic Information (VGI) has been used together with Professional Geographic Information (PGI) since its inception during the mid 00’s alongside neogeography. While the ...

Amateur Volunteered Geographic Information (VGI) has been used together with Professional Geographic Information (PGI) since its inception during the mid 00’s alongside neogeography. While the geographic accuracy and quality of VGI has been demonstrated to be more than good enough, no previous research has been published on the influence VGI has on the user perceptions of the mashup. This paper presents a quantitative investigation into how including VGI in mashups, and telling users their mashup contains VGI influences user perceptions of quality and authority- which ultimately decide if the user wishes to utilise the mashup or not.

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  • Unlike most of you, I am not a geographerInstead I am a designerA Human Factors Designer
  • Although early in its development, the cross over between human factors and geography is growing.This is an emotion map of Greenwhich park, human experiences geotagged and mashed up.Using this information we can understand how to design the park, its facilities and all products associated with it
  • But where we as a society see design and geography touch most profoundly is the mashupWith the advent of web 2.0, neogeography allows VGI and PGI to be combined and experiences
  • We know from previous research that different user groups judge PGI and VGI differently.
  • This leads us to ask a serious questionTo answer we need a framework to understand user perception
  • Rieh (2002): It is more useful to consider the attributes of information rather than the professionalism of the contributor Proposed the following framework of information judgement
  • From this we get a simple approachPresent users with both PGI and PGI + VGI data setsSee if there is statistically significant influenceCONFIRMATORY FACTOR ANALYSIS = lump all together
  • From this we get a simple approachPresent users with both PGI and PGI + VGI data setsSee if there is statistically significant influence
  • Need to select a user groupRely on GI to plan journeysJourney shave risk = critical analysisAccessible Travel based (funding)
  • We selected wheelchair users in travel situations for our user group
  • So we have clearly two parts to our investigationwe needed two sets of data in order to test our research questionThen we can go ahead and do an experiment
  • This leads us to ask a serious questionTo answer we need a framework to understand user perception
  • We selected a route around London using bus, train, underground and DLRThis represents tourist wheelchair travel in London
  • 5 wheelchair users1 assistent
  • Put the info together in a mashupAnd here is an example of the data with presented the participants withAt the end of using the maps a 32 question Likert scale (5 point) was presented to test the perceptions of Quality, Authority and Usability
  • This leads us to ask a serious questionTo answer we need a framework to understand user perception
  • In short this means that telling people that their mashups contained information from untrained volunteered has no statistically significant effectIn fact – statistical similarityBut presenting users with VGI enhanced judgements of qualityIt is the information that is being assessed which has the influence
  • Only wheelchair users took part (101)TALK ABOUT WEBSITE + LIKERT SCALEDid a usability study on the website to ensure validity
  • Remember the model of Rieh from earlier4 questions (2 + and 2 -) per criterionCronbach alpha coefficient was .95
  • USERS JUDGE THE DATA UTILITY OVER BIASIn short this means that telling people that their mashups contained information from untrained volunteered has no statistically significant effectIn fact – statistical similarityBut presenting users with VGI enhanced judgements of qualityIt is the information that is being assessed which has the influence
  • Have to add at least one graph by lawInfluence of presenting VGI with on usersUSERS JUDGE THE DATA UTILITY OVER BIAS
  • If we back track to thatinfographic we saw at the start, how does this compare?
  • It corresponds exactly with the concerns of the consumers as presented here two years ago.
  • So should we include VGI in Mashups?
  • We need to highlight a limitation to this
  • We need to highlight a limitation to this
  • Conclusion points!!!!VGI can enhance judgements of website qualityThis stems from the perception of the information as being more currentNo negative connotations related to the use of VGIBUT the information has to be goodVGI and PGI should be critically analysed as equals, with only relevant information being used.VGI has the potential to be used effectively in enhancing user experiences of online GI

USING VGI IN DESIGN FOR ONLINE USABILITY USING VGI IN DESIGN FOR ONLINE USABILITY Presentation Transcript

  • USING VGI INDESIGN FOR ONLINEUSABILITYT H E C A S E F O R A C C E S S I N F O R M AT I O NC h r i s t o p h e r J P a r k e r / A n d r e w M a y / Va l M i t c h e l l Ideas In Transit
  • 11/04/2012 Ideas In Transit
  • 11/04/2012 Ideas In Transit View slide
  • 11/04/2012 Ideas In Transit View slide
  • 11/04/2012 Ideas In Transit
  • Using VGI In Design For Online Usability Is the user experience of a mashup enhanced by combining data from amateur volunteers with traditional/ professional information? Ideas In Transit
  • Ideas In Transit
  • Ideas In Transit
  • Using VGI In Design For Online UsabilityResearch Question:Presenting VGI Telling ParticipantsAlongside PGI in a Their Mashupmashup Contains VGI • The degree to which • The Utility of VGI, current perceptions of what it may offer to information from users that PGI does amateur volunteers not influences perception • The Style of VGI, a of neogeography different way of presenting information Ideas In Transit
  • Ideas In Transit
  • Ideas In Transit
  • Using VGI In Design For Online Usability• Part 1 • Observation (6 wheelchair users) • VGI: Generate Data Set • Literature Review • PGI: Pool data• Part 2 • Mono Methods • Experimental • Online (101 participants) • Four Groups – with a unique combination of contents of the map and information about the map. Ideas In Transit
  • Using VGI In Design For Online Usability Part 1: VGI and PGI data collection Ideas In Transit
  • Ideas In Transit
  • Using VGI In Design For Online UsabilityVGI Data Collection Discussing Access Underground Train Bording a Train Problems with Staf Moving through the London Underground Bus Travel underground Ideas In Transit
  • Using VGI In Design For Online UsabilityPGI Data Collection Ideas In Transit
  • Ideas In Transit
  • Using VGI In Design For Online Usability Part 2: User Perception Experiment Ideas In Transit
  • Using VGI In Design For Online UsabilityResults Information Presented In Map PGI PGI + VGI Participant Told PGI Group 1 Group 3 What Map PGI + VGI Group 2 Group 4 Contained Ideas In Transit
  • Using VGI In Design For Online UsabilityExperimental Website Ideas In Transit
  • Ideas In Transit
  • Using VGI In Design For Online UsabilityResults• Information Presented in Mashup • 101 Participants Significant • F (9, 89) = 2.99 • p = .004 • Wilks’ Lambda = .77 • ηp2 = .232• Information Told to Participants • No statistical Significance • Sample Size Estimation: 303 Participants• No Statistically Significant Interaction Ideas In Transit
  • Using VGI In Design For Online UsabilityResults• Good• Accurate• Current• Useful• Important• Trustworthy• Official• Authoritative Ideas In Transit
  • 11/04/2012 Ideas In Transit
  • Ideas In Transit
  • Using VGI In Design For Online UsabilityDesign Outcomes• Don’t be scared: • No Negative Perceptions• Data Centric • Does it do what need it to do?• Currency • Do the users require current information? • Does the geographic info in their activity change rapidly?• Who are your users? • This research applies to consumers? • But what about other groups? Ideas In Transit
  • Ideas In Transit
  • Ideas In Transit
  • Using VGI In Design For Online UsabilityDesign Outcomes• VGI can enhance judgements of website quality• This stems from the perception of the information as being more current• No negative connotations related to the use of VGI• BUT the information has to be good• VGI and PGI should be critically analysed as equals, with only relevant information being used.• VGI has the potential to be used effectively in enhancing user experiences of online GI Ideas In Transit
  • Thank You Ideas In Transit