Memory Across Eye-Movements: 1/f Dynamic in Visual Search Export

@article{citeulike:3821445, abstract = {The ubiquity of apparently random behavior in visual search (e.g., Horowitz \& Wolfe, 1998) has led to our proposal that the human oculomotor system has subtle deterministic properties that underlie its complex behavior. We report the results of one subject's performance in a challenging search task in which 10,215 fixations were accumulated. A number of statistical and spectral tests revealed both fractal and 1/f structure. First, scaling properties emerged in differences across eye positions and their relative dispersion (SD/M)—both decreasing over time. Fractal microstructure also emerged in an iterated function systems test and delay plot. Power spectra obtained from the Fourier analysis of fixations produced brown (1/f2) noise and the spectra of differences across eye positions showed 1/f (pink) noise. Thus, while the sequence of absolute eye positions resembles a random walk, the differences in fixations reflect a longer-term dynamic of 1/f pink noise. These results suggest that memory across eye-movements may serve to facilitate our ability to select out useful information from the environment. The 1/f patterns in relative eye positions together with models of complex systems (e.g., Bak, Tang \& Wiesenfeld, 1987) suggest that our oculomotor system may produce a complex and self-organizing search pattern providing maximum coverage with minimal effort.}, author = {Aks, Deborah J. and Zelinsky, Gregory J. and Sprott, Julien C.}, citeulike-article-id = {3821445}, citeulike-linkout-0 = {http://dx.doi.org/10.1023/A:1012222601935}, citeulike-linkout-1 = {http://www.springerlink.com/content/l76056k0jk348688}, day = {1}, doi = {10.1023/A:1012222601935}, journal = {Nonlinear Dynamics, Psychology, and Life Sciences}, keywords = {1f, cognition, eye\_movements, eye\_tracking, vision, visual\_cognition, visual\_search}, month = {January}, number = {1}, pages = {1--25}, posted-at = {2008-12-23 05:17:05}, priority = {2}, title = {Memory Across Eye-Movements: 1/f Dynamic in Visual Search}, url = {http://dx.doi.org/10.1023/A:1012222601935}, volume = {6}, year = {2002} }

TY - JOUR ID - citeulike:3821445 L3 - citeulike-article-id:3821445 N2 - The ubiquity of apparently random behavior in visual search (e.g., Horowitz & Wolfe, 1998) has led to our proposal that the human oculomotor system has subtle deterministic properties that underlie its complex behavior. We report the results of one subject's performance in a challenging search task in which 10,215 fixations were accumulated. A number of statistical and spectral tests revealed both fractal and 1/f structure. First, scaling properties emerged in differences across eye positions and their relative dispersion (SD/M)—both decreasing over time. Fractal microstructure also emerged in an iterated function systems test and delay plot. Power spectra obtained from the Fourier analysis of fixations produced brown (1/f2) noise and the spectra of differences across eye positions showed 1/f (pink) noise. Thus, while the sequence of absolute eye positions resembles a random walk, the differences in fixations reflect a longer-term dynamic of 1/f pink noise. These results suggest that memory across eye-movements may serve to facilitate our ability to select out useful information from the environment. The 1/f patterns in relative eye positions together with models of complex systems (e.g., Bak, Tang & Wiesenfeld, 1987) suggest that our oculomotor system may produce a complex and self-organizing search pattern providing maximum coverage with minimal effort. IS - 1 JF - Nonlinear Dynamics, Psychology, and Life Sciences EP - 25 TI - Memory Across Eye-Movements: 1/f Dynamic in Visual Search VL - 6 SP - 1 KW - 1f KW - cognition KW - eye_movements KW - eye_tracking KW - vision KW - visual_cognition KW - visual_search AU - Aks, Deborah AU - Zelinsky, Gregory AU - Sprott, Julien PY - 2002/01/01/ UR - http://dx.doi.org/10.1023/A:1012222601935 ER -