title: Evaluating the human ongoing visual search performance by eye tracking application and sequencing tests.
abstract: Human visual search is an everyday activity that enables humans to explore the real world. Given the visual input, during a visual search, it is necessary to select some aspects of input to shift the gaze to next target. The aim of the study is to develop a mathematical method able to evaluate the visual selection process during the execution of a high cognitively demanding task such as the trial making test part B (TMT). The TMT is a neuro-psychological instrument where numbers and letters should be connected to each other in numeric and alphabetic order. We adapted the TMT to an eye-tracking version, and we used a vector model, the "eight pointed star" (8PS), to discover how selection (fixations) guides next exploration (saccades) and how human top-down factors interact with bottom-up saliency. The results reported a trend to move away from the last fixations correlated to the number of distracters and the execution performance.
authors: Eye Tracking & Vision Applications Lab, Department of Neurological Neurosurgical and Behavioral Science, University of Siena, Viale Bracci 2, Siena, Italy. g.veneri@unisi.it
authors: Giacomo
authors: G
authors: Veneri
authors: Elena
authors: E
authors: Pretegiani
authors: Francesca
authors: F
authors: Rosini
authors: Pamela
authors: P
authors: Federighi
authors: Antonio
authors: A
authors: Federico
authors: Alessandra
authors: A
authors: Rufa
mesh_terms: D000328:Adult; D000465:Algorithms; D001288:Attention; D003201:Computers; D003627:Data Interpretation, Statistical; D005133:Eye Movements; D005260:Female; D005403:Fixation, Ocular; D006801:Humans; D008297:Male; D008962:Models, Theoretical; D009483:Neuropsychological Tests; D010364:Pattern Recognition, Visual; D010775:Photic Stimulation / Q000379:methods*; D011597:Psychomotor Performance; D011930:Reaction Time; D012438:Saccades / Q000502:physiology*; D012815:Signal Processing, Computer-Assisted; D013997:Time Factors; D014785:Vision, Ocular; D014796:Visual Perception / Q000502:physiology*