• Hardware connections for the head-mounted setup
• Hardward connections for the table-top setup
• Anhtony's visual guide to connecting the table-top tracker
• Using the software
• How to describe eye-tracking to adult subjects
• Doing eye-tracking experiments with children
• Quirks, and things we learned the hard way
• Contact people in the lab for help

Computer Monitor
==============
- power supply
- monitor port on computer box

Computer box
===========
- monitor
- keyboard (purple)
- mouse (green)
- scene video in (green-2dot) to scene camera video out on ELMO box (yellow-2dot)
- oper video out (red-1dot) to video line in 1 on VCR (blue-1dot)
- ISCAN (green-1dot) to video out on eye camera control unit (pink)

Scene Monitor (Sharp)
==================
- power supply
- video in (on front) to video line out 1 on VCR (yellow-1dot)
- audio in (on front) to audio line out 1 on VCR (green-1dot)

Eye Monitor (Sony B&W SSM-930)
=============================
- power supply
- video in (yellow-1dot) to ISCAN on PC (green-1dot)
- (These settings may or may not be relevant: 75 omega and DC clamp both on)

VCR (Sony DSR-30 Digital Videocassette recorder (DVCAM)
==================================================
- power supply
- (These settings may or may not be relevant: external timer and function lock off (in back))
- video line in 1 (blue-1dot) to oper video out on PC (red-1dot)
- video line out 1 (yellow-1dot) to video line in on scene monitor
- audio line out 1 (green-1dot) to audio in on scene monitor
- microphone in front right (trap door)
- line 1 (L1) selected using "input select" in pull-out panel in front
- (These settings may or may not be relevant:
    NS audio=off
    DVCAM=on
    (lock icon)=off
    wide=off
    DF=on
    timer rec=off
    autorepeat=off
    stereo=on
    onePGM play=off
    main/L=off
    sub/R=off
- (More settings (in pull-out panel) which may or may not be relevant):
    command mode=off
    audio monitor=stereo1
    PCM mode=16 bit

ELMO camera box
===============
- power supply (connection is tricky)
- scene camera video out (yellow-2dot) to scene video in on PC (green-2dot)
- camera (in front) to visor **There is a pin loose in this connection, so right now this SHOULD NOT be unplugged**
- (These may or may not be relevant): AGC=up, W.B.=auto

ISCAN eye camera control unit
=========================
- power supply
- eye camera video out (pink) to video in/out on PC (blue-2dot)
- eye imager in (in front) to visor **There is a pin loose in this connection, so right now this SHOULD NOT be unplugged**

Hardware connections for the TABLE-TOP setup:

Coming soon!

Anthony's visual guide to connecting the TABLE-TOP tracker:

Check out Anthony's visual guide to connecting the table-top eye-tracker!

Using the software:

See hard copy of Irina's "Guidelines for Using the Eye-tracking Lab".

How to describe eye-tracking to adult subjects:

After the subject signs the eye-tracking consent form, you should describe to him/her what the eye-tracking apparatus does. For example:
 

[Put on the visor and demonstrate with your own eye]

"First, there is a small video camera mounted on the visor which records what you are looking at [show scene monitor]. Since it's mounted on the visor, this means that you can move your head around and it moves with you.

Next, there is an infrared light that is directed at your eye and gets reflected off of the surface. You don't actually see the light since it's infrared -- it's like the beam on your TV's remote control. IT IS NOT A LASER, and it doesn't hurt your eye at all. The beam of light gets reflected off the cornea, and the computer tracks the location of this reflection and also the location of your pupil [show eye monitor], and subtracts the two to determine where exactly in the scene you are looking.

[Take off visor]

Before we begin the experiment, we need to calibrate the eye-tracker. Calibration means that we tell the computer where you are looking. I will ask you to look at specific numbers in the display. During this time only, I want you to keep your head as still as possible, and try not to blink too much. After the calibration is finished, you can move your head and blink as much as you want."
 

See Janet and Marian's hard copy guide to working with kids.

Quirks, and things we learned the hard way:
 

• Avoid using white or light-colored stimuli (objects or pictures). The cross hair is white, so it is very hard to find the white cross hair on a white background when analyzing the data. [Jennifer]
• If the subject's eyelids sag, the computer cannot calculate the locate of the pupil (or the corneal reflection) properly. It may pick up part of the subject's eyelid and think that it is the pupil. When this happens, you may get no tracking at all, OR it will appear as if the subject is looking lower than s/he actually is. For example, it will appear that s/he is looking at the number 8 when actually s/he claims s/he is looking at the cross. When this happens, remind the subject to keep his/her eyes open. [Jennifer]
• The VCR must be set to line 1 ("L1" shows on the front display). [Irina]
• You should start the calibration by having the subject fixate on the cross at location 5. If the software is not set to start calibration at this point (that is, the center cross is not circled in the software display), cycle through the positions using <enter> until you get to this position. [Irina]
• The monacle (the glass reflector) needs to be angled at approx. 45 degrees from vertical. You can adjust the angle slightly if the scene is not in full view. [Jennifer]
• ADD MORE HERE!!!

Contact people in the lab for help:

People who have had experience using the head-mounted or table-top eye-tracker are:

Irina
Janet
Jennifer
Fabiola
Tovah
Anthony
(add more names here)