{"pk":25506,"title":"Turn, Turn, Turn:\nPerceiving Global and Local, Clockwise and Counterclockwise Rotations","subtitle":null,"abstract":"The processing of Navon figures (Navon, 1977), i.e.,\nhierarchical letter stimuli, has been studied in experimental\nsettings for many years. In particular, they have been studied\nin the context of visual hemifield studies and yielded an\ninteraction between hemifield and whether a target is at the\nlocal or global level, with a right hemisphere advantage for\nthe global level, and a left hemisphere advantage for the\ntargets at the local level (Sergent, 1982). This is a ventral\nstream process, however, and we were interested in whether\nthere might be a similar interaction for hierarchical motion\nstimuli, presumably a dorsal stream process. Hence we\ndeveloped a series of dynamic geometric Navon figures in\norder to study global/local rotation processing. These figures\nconsist of a global figure (a triangle or a square) made up of\nlocal figures (also triangles or squares). Both global and local\nfigures can rotate in either clockwise or counterclockwise\ndirections independently. We found that there is no right or\nleft visual field perceptual advantage for either the global or\nlocal levels of these figures. However, curiously enough, we\nfound that there is a significant processing advantage for\nclockwise motion compared to counterclockwise motion. We\nalso found a highly significant interaction between the\ndetection of a particular rotational motion and the presence or\nabsence of that motion in the figure being examined. Finally,\nour data strongly support the Global Precedence Hypothesis\nwhich says that people generally tend to focus on the global\nproperties of an object before local properties and that\nprocessing proceeds in a global-to-local direction.","language":"eng","license":{"name":"","short_name":"","text":null,"url":""},"keywords":[],"section":"Papers","is_remote":true,"remote_url":"https://escholarship.org/uc/item/7bj799z3","frozenauthors":[{"first_name":"Robert","middle_name":"M","last_name":"French","name_suffix":"","institution":"LEAD-CNRS UMR 5022, Université de Bourgogne","department":""},{"first_name":"Helle","middle_name":"","last_name":"Lukowski-Duplessy","name_suffix":"","institution":"LEAD-CNRS UMR 5022, Université de Bourgogne","department":""},{"first_name":"Cory","middle_name":"","last_name":"Rieth","name_suffix":"","institution":"Computer Science and Engineering, UCSD","department":""},{"first_name":"Garrison","middle_name":"W","last_name":"Cottrell","name_suffix":"","institution":"Computer Science and Engineering, UCSD","department":""}],"date_submitted":null,"date_accepted":null,"date_published":"2015-01-01T18:00:00Z","render_galley":null,"galleys":[{"label":"PDF","type":"pdf","path":"https://journalpub.escholarship.org/cognitivesciencesociety/article/25506/galley/15130/download/"}]}