The Effect Of Speed, Time Stress And Number Of Targets Upon Dynamic Visual Search

Visual search is one of the most important research areas in humanfactors which is broadly adopted in safety check, medical check, industrialinspection, military actions and PC game design. The most common type ofvisual search is dynamic. However, currently most of the researches focus onstatic visual search, leaving the dynamic waiting for a further development.This work is a study of such a kind of dynamic visual search while thetarget and its background move in the same direction and with the same speed.Research addresses on the study of the effect of speed and time stress upondynamic visual search, as well as the model of two-target dynamic visualsearch. First, both physical and psychological researches regarding to visualsearch have been explained in a detailed way, including the question areawhich regards to the study of moving speed on search performance. Based onthis point, experiments and statistical analysis have been made to find themoving speed interval which causes the significant performance deteriorationcomparing to the static visual search. Then, an investigate on effect ofdifferent levels of time stresses upon search performance under differentspeed levels has been made, although the result is a little astonished, adetailed discussion is followed. Finally, the two-target dynamic random visualsearch model has been established, and the conclusion is that it is related tothe existence of inhibition of return in the dynamic status.Comparing to static visual search, dynamic visual search has morevarieties and is more complex. This work could be a basis for the further studyof eye movement, lobe size, visual attention and working memory related todynamic visual search.