tobii eye tracker setup guide for testing mobile devices

Download Tobii Eye Tracker Setup Guide For Testing Mobile Devices

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EyeTrackingMobile DeviceswithTobiiEye TrackersSetupGuide January29,2010 TobiiTechnologyAB Before using this guide to setup your Tobii Eye Tracker we strongly recommend reading the Tobii Whitepaper entitled Using Eye Tracking to Test Mobile Devices for a detailed explanation of the different factors to consider when doing mobiledeviceeyetracking.

Contents1 Emulatorsetup.....................................................................................................................3 1.1 1.1.1 1.1.2 1.2 2 SetupProcedure .........................................................................................................4 . Equipmentsetup ....................................................................................................4 . CreatingthetestinTobiiStudio.............................................................................4 Testing.........................................................................................................................6

Belowtablesetup................................................................................................................7 2.1 2.1.1 2.1.2 2.2 SetupProcedure .........................................................................................................8 . Equipmentsetup ....................................................................................................8 . CreatingaTobiiStudiotest ....................................................................................9 . Testing.......................................................................................................................10

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InvertedXseriessetup.......................................................................................................11 3.1 3.1.1 3.1.2 3.1.3 3.1.4 3.1.4 3.2 SetupProcedure .......................................................................................................12 . Equipmentsetup ..................................................................................................12 . CreatingthetestinTobiiStudio...........................................................................14 ConfiguringtheinvertedTobiiXseries................................................................14 Perspectivecalibration.........................................................................................15 Participantcalibration..........................................................................................17 Testing.......................................................................................................................18

2010TobiiTechnologyAllrightsreserved.TobiiTechnologyandtheTobiilogoareeitherregisteredtrademarks ortrademarksofTobiiTechnologyintheUnitedStatesand/orothercountries. www.tobii.com

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1 Emulatorsetup

Figure1.Illustrationofthissetup.

Equipmentneeded TobiiTserieseyetracker(T60,T120) Heightadjustablechair Deeptable Twomousedevices Mobiledeviceemulatorinstalledonthetestcomputer TestcomputerwithTobiiStudiosoftware

2010TobiiTechnologyAllrightsreserved.TobiiTechnologyandtheTobiilogoareeitherregisteredtrademarks ortrademarksofTobiiTechnologyintheUnitedStatesand/orothercountries. www.tobii.com

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1.1 SetupProcedure

Figure2.Overviewofthesetup.

1.1.1 Equipmentsetup Thefirst,andprobablythemosttimeconsumingstepofthissetupistolocateandinstallthe emulator to be used during testing. As that procedure is specific for which device to be emulated,wecanunfortunatelynotprovideanyguidanceregardinghowtodothis. 1.1.2 CreatingthetestinTobiiStudio AfterinstallingastableemulatoronthecomputerrunningTobiiStudio,connectcomputerto the Tobii Tseries eye tracker. Create a Tobii Studio Project and a test in which a screen recordingelement(torecordtheemulator)isselectedanddraggedintotheworkspace,i.e. ontothetimeline.Ifneeded,alsoincludeaninstructionelementonthetimelinetoprovidethe participants with some initial guidance before the test commences. Using the Questionnaire elementcanalsobevaluableinordertocollectdatafromtheparticipants.

Figure3.Extendeddesktopdisplay.Thedashedlinehighlightsthedivisionbetweenthetwoscreens. 2010TobiiTechnologyAllrightsreserved.TobiiTechnologyandtheTobiilogoareeitherregisteredtrademarks ortrademarksofTobiiTechnologyintheUnitedStatesand/orothercountries. www.tobii.com

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It is advisable to use two screens connected to the computer running Tobii Studio during testingusingthissetup.Byusingtwoscreensthemoderatorcontrolthestartandstopofthe recording and ensure that the participant is positioned correctly as well as that eye tracking data is collected continuously during the entire session. Set the screen on the Tobii Studio computertosharetheinterfaceasanextendeddesktopwiththeeyetracker(seeFigure3). Selecttheeyetrackerasthepresentationscreenusingthepresentationscreenselectortoolin TobiiStudio 1 .Clickon[identify]toconfirmyouhaveselectedtherightscreensetup.Connect an extra mouse to the Tobii Studio computer to allow the participants to interact with the interfaceoftheemulator.Starttheemulatoranddragitontotheeyetrackerscreen.Choosea suitablepositionfortheemulatoronthescreenandensurethatpositionisnotalteredduring the testing as that will eliminate the possibility of quantitative analysis of the combined eye tracking data from several participants. Enable Show Track Status (Ctrl+T) and position the Track status window (see Figure 4) on the moderators screen. The Track status window is useful when positioning the participant correctly in front of the eye tracker as well as for ensuringthattheparticipantstayswithintrackabledistancefromtheeyetracker.

Figure4.Trackstatuswindow.

1 ThisfeatureisavailablefromTobiiStudio2.0.However,itisnotincludedintheBasicversion ofthesoftware.IfusingtheBasicversionorapreviousversionofTobiiStudio,theeyetracker monitorhastobesetastheprimarymonitorbyusingtheDisplaySettingsinWindows. 2010TobiiTechnologyAllrightsreserved.TobiiTechnologyandtheTobiilogoareeitherregisteredtrademarks ortrademarksofTobiiTechnologyintheUnitedStatesand/orothercountries. www.tobii.com

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Figure5.Overviewoftheconnectionsbetweenthedifferentpartsofthesetup.

1.2 TestingBefore the participants arrive, ensure that all cables are connected correctly (see Figure 5). Alsoconductapilottesttoensurethatboththetestsetupaswellastheproceduretobeused during the testing are working properly. When the participant arrives, ask him or her to sit downinfrontoftheeyetracker.UsetheTrackStatuswindowtoguidetheparticipanttoadapt anappropriatepositionatacorrectdistancefromtheeyetracker.Ensurethattheparticipant issittingcomfortablyandisabletointeractwiththecomputernaturally.Startthecalibration procedure in Tobii Studio and initiate the test when the participant is ready. The actual test procedureisidenticaltoconductingatraditionaleyetrackingstudyusingascreenstimulus.

Rememberto Makesuretheemulatordoesntmoveduringorinbetweentesting.Maintainingtheexactsamepositionof theemulatoriskeytobeingabletousequantitativeanalysistoolssuchasAreasOfInterest. Considerchoosingalowerresolutiononthestimuliscreentorelativelyenlargetheemulatorwindow(when this is not possible to change within the emulator). By making the interface larger, analysis of gaze data regardingsmalldetailsbecomesmuchmorereliableasonlyasmallpartoftheinterfacethenwillbeseen during each fixation. However, if testing is done to investigate which areas of the screen the participants fixate on rather than which details they are interested in, it is better to use the actual size of the mobile devicesscreen. o Considerusingthefullscreenmodeoftheemulator.Ifafullscreenmodeisavailableitbothensures that the emulator always appear in the same position and enlarges the user interface of the emulator. Ensurethattheparticipantmaintainsthedistancetotheeyetracker.Theparticipantmighttrytoleancloser togetabetterviewofthescreen(e.g.ifsmalllettersarepresentedonthescreen).Trytopreventthisby placing the emulator towards the back of the table. This positioning uses the table as a barrier to limit participantsabilitytogettooclosetothescreen. Explain to the participant that there are two computer mouse devices so both the moderator and the participantcaninteractwiththemousepointer.Usingasinglecomputerwithanextendeddesktopdisplay which both the participant and the moderator can interact with might otherwise be confusing for the participant. o Makeitcleartotheparticipantwhenheorshecanusethemouseorwhenthemoderatorisgoing tobecontrollingit. 6

2010TobiiTechnologyAllrightsreserved.TobiiTechnologyandtheTobiilogoareeitherregisteredtrademarks ortrademarksofTobiiTechnologyintheUnitedStatesand/orothercountries. www.tobii.com

2 Belowtablesetup

Figure6.Illustrationofthesetup.

Equipmentneeded TobiiTserieseyetracker(T60,T120) Floorstandtoattachthemobiledeviceholder,fixedinplace Mobiledeviceholderorasled(longbendedpieceofplasticormetal)withadhesive (tapestrip)toholdthemobiledevice Asmallexternalvideocamerawithahighresolutionandframerate(recommendedat least.800X600@15fps,preferablymore) Adjustablelightingfixturewithalightsource(e.g.asmallbatteryoperatedLEDlight) Heightadjustablechair Deeptable,heightadjustable(preferablefixed) Mobiledevicetotest Usercam.(builtin) TestcomputerwithTobiiStudiosoftware

2010TobiiTechnologyAllrightsreserved.TobiiTechnologyandtheTobiilogoareeitherregisteredtrademarks ortrademarksofTobiiTechnologyintheUnitedStatesand/orothercountries. www.tobii.com

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2.1 SetupProcedure

Figure7.Overviewofthesetup.

2.1.1 Equipmentsetup Inthissetupadeepandhightableisneeded.Thedepthofthetablepreventstheparticipant fromgettingtooclosetotheeyetracker.Ahightableprovidesmorespacefortheparticipant wheninteractingbelowthetablewiththephoneandeliminatestheneedfortheparticipant toleanforwardstousethesetup. 2.1.1.1 Theeyetracke

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