The Clinical and Translational Research Support Core’s Shared Instrumentation services provide Gazepoint GP3 and ISCAN PCI Pupil/Corneal Reflection Tracking Systems (ISCAN Corp., Woburn, MA) of two types:
These eye tracking systems allow IDDRC researchers to noninvasively observe, record, and analyze research participants’ visual fixations in real time.
Two of the apparatuses are equipped with head-mounted imaging systems consisting of light-weight miniature video cameras and an infrared light source, all mounted on a plastic visor.
The Facility also includes three free-head remote imaging systems. Each consists of an eye camera and infrared light source mounted on computer-driven pan/tilt controls mounted below a stimulus presentation monitor that is connected to a data acquisition PC. The system automatically adjusts the eye camera to compensate for changes in the participant’s head position. Multiple and overlapping areas of interest can be defined for each experimental image for later analysis.
After an initial brief calibration period, both the head-mounted and free-head imaging systems afford the participant a free range of head movements, require no stereotactic restriction, and do not block the participant’s field of view. The systems are therefore appropriate for use with individuals with a broad range of developmental levels.
William V. Dube, Ph.D.
William J. McIlvane, Ph.D.
Teresa V. Mitchell, Ph.D.
Krista M. Wilkinson, Ph.D. (UMass Medical School and Pennsylvania State University)
Chata A. Dickson, Ph.D. (New England Center for Children, Southborough, MA)
Christophe Gerard, Ph.D.
Rachel Farber, M.S.
Special thanks to: Rikki Razdan and Alan Kielar (ISCAN, Inc.), The Guild Learning Center, New England Center for Children, Lyn Balsamo, Tom Fowler, Kevin Farren, Kristin Lombard O’Donnell, and Emily Wheeler.
The Balance Between Top-Down & Bottom-Up Attentional Processes in Autism
Stimulus Structure Enhancement of Visual Symbol Detection in AAC
Guiding Visual Attention to Enhance Discrimination Learning
Behavioral and Sensory Evaluation of Auditory Discrimination in Autism
Stimulus Overselectivity and Contingency Analyses of Observing and Attending in Intellectual Disabilities