U se r ’s Ma n u a l To b i i X2- 60 E y e Tr acker
Tobii X2-60 Eye Tracker User’s manual Version 1.0.3 06/2014 All rights reserved. © Tobii Technology AB The information contained in this document is proprietary to Tobii Technology. Any reproduction in part or whole without prior written authorization by Tobii Technology is prohibited. Products that are referred to in this document may be either trademarks and/or registered trademarks of the respective owners. The publisher and the author make no claim to these trademarks.
Table of Contents 1 In t r o du ct io n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.1 2 Ha r dwa r e P a c ka ge C o n t e n t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F2 F1.5 Magnetic Field Warning .........................................................................................33 F1.6 Child Safety..........................................................................................................34 F1.7 Do not Open the Tobii X2–60 Eye Tracker ................................................................34 Compliance Information.........................................................................................................34 F2.1 FCC Statement..
1 1.1 1.1.1 Introduction Introduction Overview This document describes the features and functionality of the Tobii X2–60 Eye Tracker. The X2 Eye Tracker is a stand-alone eye tracker that can be used in various setups by attaching it to monitors, laptops or for performing eye tracking on physical objects. The eye tracker requires some assembly before first time use and after transport. The Tobii X2 Eye Tracker is an unobtrusive eye tracker for detailed research of natural behavior.
2 Hardware Package Content 2.1 Standard Package The standard Tobii X2–60 Eye Tracker package contains the following main parts: • Tobii X2-60 Eye Tracker Compact Edition • Two adhesive mounting brackets for permanent installation. • USB extension cable • Tobii X2-60 Eye Tracker USB memory stick containing the Tobii Eye Tracker Installer • Tobii X2–60 Eye Tracker external processing unit.
• Zipper bag To be used for transporting the eye tracker unit. • Tobii X2-60 Eye Tracker user manual Tobii X2–60 Eye Tracker User Manual (pdf). 2.2 Available Accessories The following accessories are available for the Tobii X2 Eye Tracker: • Tobii X2 Eye Tracker laptop case Laptop case specially designed for transporting the Tobii X2 Eye Tracker together with your laptop in one single case.
3 Product Care 3.1 Temperature & Humidity 3.1.1 General use The Tobii X2 Eye Tracker is best kept in dry conditions at room temperature. The recommended range for temperature and the humidity value for the device is as follows: • • 3.1.
4 Setting Up the Tobii X2–60 Eye Tracker The main steps you need to perform in order to set up and configure the Tobii X2–60 Eye Tracker are: 1. Check that you have all the components needed — read 2 Hardware Package Content, page 2. 2. Check the prerequisites in 4.1 Prerequisites, page 5. 3. Mount the X2 Eye Tracker, according to the setup that you will use — read 4.2 Mounting the Eye Tracker, page 5. 4.
4.2.1 Mounting the Tobii X2 Eye Tracker to a Screen For mounting the Tobii X2 Eye Tracker to a laptop or monitor you use one of the adhesive mounting brackets provided in the standard package or in the additional mounting brackets kit (accessories). 1. Choose one of the mounting brackets provided in the Tobii X2 Eye Tracker package.
5. Position the mounting bracket on the bottom frame of your screen. Make sure that it is centered exactly in the middle point of the screen bottom frame as shown in the picture. Standard package mounting brackets Additional mounting brackets (mounting bracket kit) 6. Apply pressure to the mounting bracket for 30 seconds to make sure it gets attached to the screen. Standard package mounting brackets Additional mounting brackets (mounting bracket kit) 7.
8. Position the Tobii X2 Eye Tracker and attach it to the mounting bracket as shown in the figure to the right. Make sure to position it in the right way so that the mounting bracket fits exactly in the slot on the back of the eye tracker. The magnet inside will keep the eye tracker in place. Do NOT connect the Tobii X2 Eye Tracker to the computer before running the installation software provided on the USB memory stick .
4.3 Connecting the Tobii X2-60 Eye Tracker external processing unit The Tobii X2–60 Eye Tracker is shipped together with an external processing unit (see 2 Hardware Package Content, page 2). In order to be able to start using your eye tracker, after mounting the Tobii X2 Eye Tracker to a screen or according to your setup type, you must connect it to the Tobii X2–60 Eye Tracker External Processing Unit. To connect the Tobii X2–60 Eye Tracker to your computer via the external processing unit: 1.
3. When you start the Tobii Eye Tracker Installer it opens with a Welcome screen. In order to be able to continue with the installation you need to confirm that you acknowledge and agree to the conditions of the end-user license agreement by checking the tick-box: 4. Click the Start button. You will be directed to the Firmware and Drivers screen. Please wait while the needed drivers and firmware are being installed. You can see the status on the screen: 5.
8. Click the Next button. You will be directed to the Select Display Monitor screen 9. Specify on which of the screens connected to your computer the Tobii X2 eye tracker is mounted. If you are unsure which screen is the one that the eye tracker is attached to, click the Identify button. You will see a number displayed on each screen so that you can identify it. 10. Click the Next button. You will be directed to the Map to Display Monitor screen.
11. Click the Start mapping button. The mapping screen will be displayed on the monitor the eye tracker is attached to (the monitor you previously selected in step 9). 12. Drag the handles on the dotted lines to align them with the mounted Tobii X2 Eye Tracker: • for the Tobii X2 Eye Tracker — align the dotted lines with the outer margins of the eye tracker.
4.6 Re-configuring the Tobii X2 Eye Tracker If you move the Tobii X2 Eye Tracker to another computer you must always run the Tobii Eye Tracker Installer on that computer to configure the eye tracker for the new setup. If you move the eye tracker between different computers, monitors or setups you must always re-configure the Tobii X2 Eye Tracker settings for it to work properly. To re-configure the Tobii X2 Eye Tracker: 1.
6. Click the Start mapping button. The mapping screen will be displayed on the monitor the eye tracker is attached to. 7. Drag the handles on the dotted lines to align them with the mounted Tobii X2 Eye Tracker. Precisely align the dotted lines with the outer edges of the eye tracker. 14 4 Setting Up the Tobii X2–60 Eye Tracker Tobii X2-60 Eye Tracker User’s manual v.1.0.
It is very important to be as careful and precise as possible when performing this step because a wrongly performed configuration may result in offsets in the eye tracking data. 8. 4.7 When you have finished aligning, click the I’m done button. The settings are automatically saved and the Tobii X2 Eye Tracker is now re-configured. Close the window. The X Configuration Tool The Tobii X2 Eye Tracker can be used in many different setups.
The image below illustrates the reference measurement point of the Tobii X2 Eye Tracker, as seen from the side: 4.7.2 Setting the parameters in the X Configuration Tool When using the Tobii X2 Eye Tracker without being mounted on a standard laptop or monitor, you must specify all the positioning parameters in the X Configuration Tool, as described below: 1. 2. U n i t s : — Select the unit you want to use for measuring the distances: inches or centimeters.
• – For projected displays, measure the size of the visible projection on the display (see the following image). – In a setup where the stimuli are filmed by a scene camera, the active display area must be calculated based on the calibration grid size. The calibration grid must have the same shape as the calibration pattern used in Tobii Studio and include either five or nine points. The calibration points can be drawn on a paper, marked on a calibration board, or marked on objects in the scene.
• • • B — display angle. Measure the angle between the vertical plane and the active display using the digital angle meter. In a scene camera setup measure the angle between the vertical plane and the calibration grid. If the display is tilted forward you should enter a negative angle (use “-” in front of the value). If the active display is completely vertical the angle value is 0. In a scene camera setup where you want to track objects on a horizontal table the angle would be 90 degrees.
5 Positioning The distance from the participant’s eyes to the eye tracker should be approximately 60–65 cm (23–26ʺ) for best performance. However, the eye tracker can still track eye movements as long as the participant stays within the distance interval from the eye tracker mentioned below. If the eye tracker is too close or too far away from the participant there is a risk of losing some of the gaze data.
If you place the test participant farther away from the object you can track larger objects, if you place the test participant closer to the object you can track smaller objects. If you place a test participant at 65 cm (26ʺ) you can track a 25ʺ (16:9) monitor. Regardless of the distance to the object the eye tracker should always be placed approximately 65 cm (26ʺ) from the participant. For more information about supported monitor sizes please see Appendix B Recommended Display Sizes, page 29 5.
6 Typical Setups This section describes the typical setup configurations that can be used with the Tobii X2–60 Eye Trackers and Tobii Studio or other supported software. For specific information about custom configurations or system requirements and recommendations, please contact your Tobii sales representative or Tobii technical support. The System Requirements and Recommendations can be downloaded at www.tobii.com. 6.
6.2 Local Live Viewer Setups These setups are used when the test is to be supervised from a separate screen where the test leader can see the test participant’s eye movements in real time during testing. The following image illustrates two typical setups using the Live Viewer.
6.3 Physical Object Setup Real objects, such as magazines or mobile devices, can be used as stimuli in a scene camera setup where a video camera is filming the object during the recording. In this setup, the calibration points cannot be displayed on a screen during the calibration, thus a separate calibration grid must be used. The grid can be drawn on a paper and include five or nine points. The object you intend to track should fit within an area which is 25% larger than the actual calibration grid.
7. 6.4 Run Tobii Studio and setup your test by using the scene camera feature. For details about how to connect the eye tracker in Tobii Studio and further instructions on using Tobii Studio, please refer to the Tobii Studio documentation available on www.tobii.com. External Video Stimulus Recording The stimulus presented on the screen is generated by an external device such as a DVD player, computer or gaming console.
8. 6.5 Switch the input source of the primary screen (used for stimulus presentation) to the external device used for generating the stimuli (DVD player, gaming console, etc.) E-prime Setup The setup described in this section is a two-computers setup using Tobii Studio to record the gaze data and E-Prime® to present the stimulus. The E-Prime® software and Tobii Studio software are run on two different computers and communicate with the Tobii Eye Tracker as well as between each other over a LAN network.
Appendix A Tobii X2–60 Eye Tracker Specifications Table A.1 Gaze Accuracy T o bii X 2- 60 Ey e T r a c ke r C o m pa c t Edit io n ( f ir m wa r e ve r sio n — 1.0.5) Ga z e a c c u r a c y1 Bino cula r Mono cula r At ideal conditions 0.4 0.4 At 25° gaze angle 0.4 0.5 At 30° gaze angle 0.4 0.5 At 1 lux 1.2 1.9 At 300 lux 0.4 0.4 At 600 lux 0.4 0.6 At 1000 lux 0.6 0.9 White stimuli background 1.2 1.9 1.
Table A.2 Gaze Precision T o bii X 2-60 Eye T r a c ke r C o m pa c t Edit io n Ga z e pr e c isio n at ide a l c o n dit io n s Bino cula r Mono cula r Artificial Eye NA NA Human Eye 0.34 0.45 Table A.3 Eye Tracking Specifications Ey e T r a c kin g S pe c if ic a t io n s T o bii X 2-60 Eye T r a c ke r C o m pa c t Edit io n 60 Hz Sa mplin g ra t e (std. dev. approx. 0.1 Hz) To ta l syst e m la te n c y <35 ms Tim e t o t r a c kin g r e c ove r y For blinks: immediate He a d 1.
T o bii X 2-60 Eye T r a c ke r C o m pa c t Edit io n Ha r dwa r e P a c ka ge Safety Instructions Installation Guide USB extension cable Zipper bag Tobii X2-60 Eye Tracker USB memory stick containing the Tobii Eye Tracker Installer. Tobii X2-60 Eye Tracker user manual (pdf) Table A.
Appendix B Recommended Display Sizes The eye tracker can only do accurate eye tracking of a person’s eyes if the visual angle, as seen from the person’s eyes, does not exceed 36° for the Compact Edition, between the center of the eye tracker and any point on what the person is looking at.
Appendix C Data Output Different applications can be connected as clients to the eye tracker to, e.g., gather eye gaze data in real-time and perform calibrations. Applications that can be used together with the eye tracker include the Tobii Studio software, third party software products, or your own custom software based on the Tobii Software Development Kit. For more information about the supported software products please refer to the product descriptions and documentation for the respective products.
Appendix D Glossary Mo n o c u la r /bin o c u la r Monocular data shown is based on data from the participant’s dominant eye only. Binocular data is the average of the two eyes. Ga z e pr e c isio n Describes the spatial angular variation between a set of consecutive gaze samples. Gaze precision can be measured under various conditions. Ga z e a c c u r ac y Describes the angular average distance from the actual gaze point to the one measured by the eye tracker.
Appendix E How to upgrade the firmware From time to time Tobii will release new updates of the eye tracker firmware that will improve performance and/or introduce new functionality. Follow the instructions below to upgrade the firmware on your eye tracker. 1. Download the firmware zip-file from the support section on the Tobii web site. 2. Extract the firmware file (XXX.tobiipkg) from the downloaded zip-file. 3. Make sure the eye tracker is connected and working. 4.
Appendix F F1 F1.1 Safety and Compliance Safety Mounting Warning The Tobii X2–60 Eye Tracker should be mounted according to MANUFACTURER instructions of approved mounts. Tobii or its agents are not liable for damage or injuries to a person or its property due to a Tobii X2–60 Eye Tracker falling from a mounted configuration. The mounting of a Tobii X2–60 Eye Tracker is done entirely at the user’s own risk.
F1.6 Child Safety The Tobii X2–60 Eye Tracker is an advanced computer system and electronic device. As such it is composed of numerous separate, assembled parts. In the hands of a child certain of these parts have the possibility of being separated from the device, possibly constituting a choking hazard or another danger to the child. Young children should not have access to, or the use of, the device without parental or guardian supervision. F1.
• • • EN 55024:1998+A1+A2, Information technology equipment. Immunity characteristics. Limits and methods of measurement IEC 60950–1:2005, Safety of information technology equipment FCC part 15, Class B Tobii X2-60 Eye TrackerUser ’s manual v.1.0.
Appendix G Safety and Regulatory Information: Tobii X2–60 External Processing Unit Risk of explosion if the battery is replaced with an incorrect type. Batteries should be recycled where possible. Disposal of used batteries must be in accordance with local environmental regulations. Failure to use the included FSP Group, Inc. Model FSP065-REBPower Adapter may violate regulatory compliance requirements and may expose the user to safety hazards.
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