The EyeLink Portable Duo

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0 EyeLink PORTABLE DUO 1 The EyeLink Prtable Du Prtable Eye Tracking, Uncmprmised Data Quality The EyeLink Prtable Du by SR Research prduces the highest quality data t emerge frm a cmpact and easy t

The Prtable Du features distinct dual-use data cllectin mdes unique t EyeLink trackers, with specialized algrithms fr head free-t-mve and head-stabilized tracking mdes.

2 0 EyeLink PORTABLE DUO 1 The EyeLink Prtable Du Prtable Eye Tracking, Uncmprmised Data Quality The EyeLink Prtable Du by SR Research prduces the highest quality data t emerge frm a cmpact and easy t transprt eye tracker. Everything required t take yur EyeLink lab n the rad will nw fit int a carry-n bag. The Prtable Du features distinct dual-use data cllectin mdes unique t EyeLink trackers, with specialized algrithms fr head free-t-mve and head-stabilized tracking mdes. With the same high precisin, high accuracy, and lw data lss that EyeLink systems are renwned fr, the Prtable Du meets the scientific demands f researchers in every field f endeavr, allwing the highest quality data t be acquired even in medical, educatinal, and hme settings. Distinguishing Features The Prtable Du distinguishes itself frm ther prtable eye trackers in a variety f ways: It has cmpact and pwerful camera hardware yielding high-precisin sample-level data, allwing it t prduce accurate and precise measurements f gaze lcatin and pupil size. It is a dual-use system, perating in discrete remte, head free-t-mve and high-precisin head stabilized mdes, each with their wn unique algrithms fr ensuring lw nise and high accuracy. Its cnsistent 500 Hz bincular sampling rate enables the mst sphisticated and demanding eye mvement research, including: - gaze cntingent paradigms, - micrsaccade detectin and measurement, - clinical culmtr assessment and - pupillmetry. The EyeLink Prtable Du has been designed t meet the mst stringent technical standards including IEC medical certificatin, making it ideal fr clinical and hspital use.

2 EyeLink PORTABLE DUO 3 Laptp and Tripd Munts The EyeLink Prtable Du cmes with Laptp and Tripd Munts fr fast and easy tracking n a laptp screen r fr use with an n-site display.

like clinics, ffices, daycares, schls, and hmes. With its high sampling rate and lw nise, it is perfect fr tracking patients, yung children and ther challenging participants.

develped fr any EyeLink eye tracker can be used fr bth data cllectin and analysis.

a single unified prgramming slutin cuts acrss every setting.

3 2 EyeLink PORTABLE DUO 3 Laptp and Tripd Munts The EyeLink Prtable Du cmes with Laptp and Tripd Munts fr fast and easy tracking n a laptp screen r fr use with an n-site display. The unique cmbinatin f prtability, usability, and high quality data makes the Prtable Du the perfect slutin fr researchers lking t take eye tracking ut f the labratry and int alternative envirnments like clinics, ffices, daycares, schls, and hmes. With its high sampling rate and lw nise, it is perfect fr tracking patients, yung children and ther challenging participants. Cmpatible with Existing EyeLink Applicatins The EyeLink Prtable Du uses the well-established EyeLink Applicatin Prgramming Interface (API) that has been in use fr ver 20 years, s existing prgrams develped fr any EyeLink eye tracker can be used fr bth data cllectin and analysis. This gives yu cnfidence that many prgramming ptins will be available fr yur eye-tracking task, and yur prgramming effrts will benefit when yu later want t expand frm the lab t the field r even t fmri a single unified prgramming slutin cuts acrss every setting. Free Sftware Develpment Kits (SDKs): are available fr Windws XP / Vista / 7 / 8 / 10, Mac OS X, and Linux E-Prime, MATLAB via Psychtlbx, NBS Presentatin, LabView, PsychPy, as well as C, COM interface and Pythn examples are included Free SR Research Screen Recrder sftware enables: vide capture f eye mvements verlaid n anything a Windws cmputer can display (e.g., web brwsing, interfaces, gaming, etc.) vide and eye mvement data lad int EyeLink Data Viewer fr visualizatin and analysis The EyeLink Prtable Du includes adjustable Laptp and Tripd Munts t enable superir quality eye tracking data cllectin in a wide variety f settings, bth in and ut f the labratry. Mbile, Flexible and Easy t Use Everything researchers need will fit in a tugh carry-n case fr lng distance transprt, and a wheeled cmbinatin laptp bag/backpack allws fr easy transprt fr lcal visits. In additin t Laptp and Tripd Munts, the system cmes with a lightweight Laptp Hst PC, a cmpact head supprt, and a gamepad respnse device. Experiments can be delivered n laptp screens r ther displays cntrlled by small PCs. Experiment Builder and Data Viewer SR Research Experiment Builder (crss-platfrm OS X and Windws) is a full-featured experiment delivery system with hundreds f examples designed t assist yu in quickly designing yur experiment. EyeLink Data Viewer allws quick visualizatin f the data and the creatin f data reprts suitable fr imprt t statistical analysis prgrams. See Pages 6 and 7 fr details. The EyeLink Prtable Du Hst sftware has been redesigned with a streamlined graphical user interface, making the system faster and simpler t use than ever. Calibratin can be perfrmed in a few quick steps, r fr the mst demanding patient prtcls, cntrl ver every aspect f data cllectin is nly a few clicks r keystrkes away. Cmprehensive Technical Supprt Every EyeLink Prtable Du includes perpetual technical supprt with n additinal cst r hidden annual fees. Our Research Supprt team spans tw cntinents. They understand research, and they understand yur need fr fast, cmpetent assistance in cllecting and analyzing high-quality data. Jin ur supprt frums fr free nw Simple reading data shwing interest areas autmatically generated by the Experiment Builder sftware, with eye traces and fixatins verlaid using EyeLink Data Viewer.

4 4 EyeLink PORTABLE DUO 5 Outstanding Accuracy and Precisin Whether recrding with the remte, head free-t-mve r head-stabilized tracking mde, the EyeLink Prtable Du prvides the exceptinally high level f accuracy and precisin fr which all SR Research eye trackers are renwned. Fixatin Accuracy (Head Stabilized) Repeated target fixatins t nine screen lcatins recrded with the EyeLink Prtable Du with the head stabilized fllwing a 13-pint calibratin. The inset plt represents an enlarged view f the fixatin distributin arund the center target psitin. On the right is a fixatin errr histgram demnstrating the tight fixatin accuracy distributin (Mean = 0.25, Median = 0.23, and Standard Deviatin = 0.14 ). 5 The Prtable Du prduces stable, lw-nise, bincular 500 Hz recrdings even when the head is freely mving. In the abve remte, head free-t-mve eye traces, small crrective saccades can clearly be seen in the bincular circular smth pursuit data Percentage f Fixatins 30% 20% 10% Fixatin Errr Pupil Size Accuracy Pupil size data are available with every sample cllected by the EyeLink Prtable Du. T evaluate the level f accuracy btained in pupil size measures, dts between 2.0 and 5.0 mm in diameter were laser printed, and the pupil area was measured fr each. The diameter f each dt in system units was cmputed, and the percentage difference in reprted diameter cmpared t the expected difference fr each dt was: 5 mm (142 pixels % f 4 mm) area diameter % fr -0.06% errr 4 mm (113 pixels % f 4 mm) area diameter % fr 0.00% errr 3 mm ( 85 pixels 75.22% f 4 mm) area diameter % fr +0.40% errr 2 mm ( 57 pixels 50.44% f 4 mm) area diameter % fr -0.18% errr Measurement errr is belw 0.4% errr fr all sizes. The secnd test was t see hw well the system picked up smaller changes, s we used 4 dts f 4.1,4.0,3.9 and 3.8 mm and cmpared the reprted sizes in relatin t the 4.0 mm standard: 4.1 mm (116 pixels % f 4 mm) area diameter % fr +0.19% errr 4.0 mm (113 pixels % f 4 mm) area diameter % fr +0.05% errr 3.9 mm (111 pixels 98.23% f 4 mm) area diameter % fr -0.13% errr 3.8 mm (108 pixels 95.58% f 4 mm) area diameter % fr -0.47% errr Fixatin Accuracy (Remte, Head Free-t-Mve) 0.5 Percentage f Fixatins Accuracy was assessed withut a head supprt using the Remte Mde fllwing a 13-pint calibratin. Repeated target fixatins t nine screen lcatins resulted in the lw errr levels demnstrated by the fixatin errr histgram belw (Mean = 0.26, Median = 0.22 and Standard Deviatin = 0.16 ). The inset plt is an enlarged view f the fixatin distributin arund the center target psitin. 30% 20% 10% Fixatin Errr

6 EyeLink PORTABLE DUO 7 SR Research Experiment Builder Key Features: Crss-platfrm cmpatible fr Windws (32-bit and 64-bit) and Mac OS X Graphical User Interface supprts drag and drp experiment

allws: - Manipulating text, image, and vide clip bjects - Structured drawing f text and graphical bjects - Autmatic generatin f interest areas fr text Multilanguage / Unicde supprt thrughut the

visualizatin - Animatin Playback View shws a mvie f the trial with eye mvements verlaid - Spatial Overlay View superimpses saccade and fixatin scan-path infrmatin ver an image - Tempral Graph View

saccade, interest area, r trial-based reprts fr statistical analysis Calculate hundreds f dependent measures including mst cmmn reading measures Create interest perids fr tempral data filtering

5 6 EyeLink PORTABLE DUO 7 SR Research Experiment Builder Key Features: Crss-platfrm cmpatible fr Windws (32-bit and 64-bit) and Mac OS X Graphical User Interface supprts drag and drp experiment prgramming Easy-t-use hierarchical experiment creatin interface Supprts simple t cmplex experimental paradigms Millisecnd precise timing f vide, audi, TTL, and respnse devices Built-in screen editr allws: - Manipulating text, image, and vide clip bjects - Structured drawing f text and graphical bjects - Autmatic generatin f interest areas fr text Multilanguage / Unicde supprt thrughut the applicatin Advanced supprt fr EyeLink eye trackers and seamless integratin with Data Viewer sftware Add custm Pythn cde t extend experiments as desired EyeLink Data Viewer Key Features: Data visualizatin - Animatin Playback View shws a mvie f the trial with eye mvements verlaid - Spatial Overlay View superimpses saccade and fixatin scan-path infrmatin ver an image - Tempral Graph View supprts visualizatin f eye data ver time - Supprts bth static and dynamic interest areas (rectangular, elliptical, r freefrm plygns) Generate heat maps fr selected trials Output eye sample, fixatin, saccade, interest area, r trial-based reprts fr statistical analysis Calculate hundreds f dependent measures including mst cmmn reading measures Create interest perids fr tempral data filtering Highly integrated with SR Research Experiment Builder, E-Prime, Presentatin, and any custm prgramming methd, under Windws, Mac OS X, and Linux SR Research Experiment Builder is a graphical prgramming envirnment fr creating cmputer-based psychlgy and neurscience experiments. EyeLink eye trackers are supprted with many advanced interactive capabilities. Cmplex visual and auditry stimulus delivery with extremely high levels f precisin and synchrnizatin is made accessible. Experiment Builder is simple enugh fr a nvice user but rich enugh t handle advanced experimental paradigms. Pythn data structures and cmmands can be incrprated fr increased flexibility. A free dem versin is available ( with sample prjects and a cmprehensive user manual that illustrates hw these examples were created. Many additinal examples, vide tutrials, and prgramming resurces are available at the SR Research supprt website ( EyeLink Data Viewer is a pwerful yet intuitive sftware package that can be used fr viewing, filtering, and prcessing gaze data recrded with EyeLink eye trackers. Several different viewing ptins prvide cnvenient ways t visualize and inspect bth tempral and spatial aspects f eye mvement recrdings. The sftware prvides a range f analysis tls that can be used t generate tabdelimited summary reprts based n interest areas, fixatins, saccades, r samples. Hundreds f basic and advanced reprt variables are prvided, including a wide range f dependent measures used in reading research. The sftware allws multiple data files t be laded int a single viewing sessin, meaning that visualizatin graphics and data reprts can be created fr entire experiments. A free dem versin f the EyeLink Data Viewer sftware is available at

6 8 EyeLink PORTABLE DUO 9 EyeLink Mdel Cmparisn Chart The EyeLink Prtable Du is a pwerful eye tracker. T help yu make the right chice, here are sme ways in which it varies frm the EyeLink 1000 Plus. EyeLink Prtable Du Technical Specificatins EyeLink Prtable Du EyeLink Prtable Du EyeLink 1000 Plus Eye Tracking Mde: Head Stabilized Tracking Remte, Head Free-t-Mve Tracking Munting Optins Weight Laptp Munt (included) Tripd Munt (included) Desktp Munt Arm Munt Screen Munt EyeLink Prtable Du and Laptp Munt - Apprximately 1 kg Minimal Setup kg Desktp Munt Arm Munt Twer Munt Primate Munt Lng Range Munts (fmri, MEG) EyeLink 1000 Plus with Desktp Munt Apprximately 2.1 kg Minimal Setup Kg Sampling Rate Eye Tracking Principle Average Accuracy 1 Saccade Event Reslutin 250, 500 Hz Mncular r Bincular Pupil with Crneal Reflectin (CR) Dwn t 0.15 (0.25 t 0.5 typical) 0.05 micrsaccades Dimensins (WxHxD) 21 cm x 4.5 cm x 11 cm Apprx. 29 cm x 18 cm x 9 cm with Desktp Munt Spatial Reslutin RMS errr unfiltered Wavelength 880 nm 890 nm, 910 nm and 940 nm fr dark adapted tracking 2 MRI / MEG tracking - Yes with Lng Range Munts Analg Vltage Output Participant Age Range Allwable Head Mvement in Remte Mde Optimal Camera-Eye Distance - Yes with Analg Output ptin TBD lder infants thrugh t adults 22 cm hrizntal, 22cm vertical at 52 cm cm in all mdes All ages infants 1 thrugh t adults 35 cm hrizntal, 35 cm vertical at 60 cm 40 cm hrizntal, 40 cm vertical at 70 cm cm in Head-Stabilized and Remte Mdes cm in Lng-range Munt Nise with Participants 1 Filter (Off / Nrmal / High) 0.03 / 0.01 / 0.01 End-t-End Sample Delay 3 M = 2.94 msec, SD = Hz M = 3.49 msec, SD = Hz Blink Recvery Time Pupil Detectin Mdels Pupil Size Reslutin 1 Gaze Tracking Range Centrid r Ellipse Fitting Hz 0.1% f diameter 32 hrizntally, 25 vertically - custmizable Ellipse Fitting Sampling Rate 250, 500 Hz mncular r bincular in all mdes 250, 500 Hz mncular r bincular in Remte Mde 250, 500, 1000 r 2000 Hz mncular 2 250, 500 r 1000 Hz bincular 2 Travel Case, Wheeled Laptp Bag Included - Lightweight Head Supprt Included - Allwable Head Mvement Optimal Camera-Eye Distance Glasses Cmpatibility On-line Event Parsing ±25 mm hrizntal r vertical 22 cm hrizntal, 22cm vertical at 52 cm cm Excellent Fixatins / Saccade / Blink / Fixatin Update Gamepad Respnse Device Included - EDF File and Link Data Type Gaze, Raw, and HREF eye psitin data / Pupil size / Online events / Buttns / Messages / Digital inputs Camera Interface USB 3.0 Gigabit Ethernet Pwer Requirements 5.0 V, 1800 ma USB pwered 12 V, 2000 ma frm external pwer supply Medical Certificatin Yes - Eye Tracker Enclsure Camera, lens. and illuminatr are sealed inside an andized aluminum enclsure with acrylic ptical windw Camera (with interchangeable lens) and illuminatr can be munted separately Real-time Operatr Feedback Certificatins Eye psitin gaze cursr superimpsed n static image r psitin traces with camera images and tracking status IEC ed. 3., AAMI ES , CSA C22.2# ed. 3.1, IEC ed. 1, ISO , ed. 1, ISO , IEC ed. 1, ISO ed. 2, IEC ed. 3.0, IEC , ed. 4 Specificatins are subject t change withut ntice. Availability f sme features depends n ptins purchased. 1. Measured with real subject fixatins. 2. Data measured with an artificial eye. 3. Time frm physical event until first registered sample (unfiltered) is available via Ethernet Specificatins are subject t change withut ntice. Availability f sme features depends n ptins purchased. 1. Weight f the Hst PC and eye tracker. 2. With apprpriate hardware cmpnents.

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