Editing Cognition (section)

====Visual search====
In one version of the ''[[visual search]] experiment'', a participant is presented with a window that displays circles and squares scattered across it. The participant is to identify whether there is a green circle on the window. In the ''featured'' search, the subject is presented with several trial windows that have blue squares or circles and one green circle or no green circle in it at all. In the ''[[Conjunctive tasks|conjunctive]]'' search, the subject is presented with trial windows that have blue circles or green squares and a present or absent green circle whose presence the participant is asked to identify. What is expected is that in the feature searches, reaction time, that is the time it takes for a participant to identify whether a green circle is present or not, should not change as the number of distractors increases. Conjunctive searches where the target is absent should have a longer reaction time than the conjunctive searches where the target is present. The theory is that in feature searches, it is easy to spot the target, or if it is absent, because of the difference in color between the target and the distractors. In conjunctive searches where the target is absent, reaction time increases because the subject has to look at each shape to determine whether it is the target or not because some of the distractors if not all of them, are the same color as the target stimuli. Conjunctive searches where the target is present take less time because if the target is found, the search between each shape stops.<ref>{{cite journal| vauthors = Wolfe J, Cave K, Franzel S |title=Guided search: An alternative to the feature integration model for visual search|journal=Journal of Experimental Psychology: Human Perception and Performance|year=1989|volume=15|pages=419–433|doi=10.1037/0096-1523.15.3.419 |issue=3 |pmid=2527952|citeseerx=10.1.1.551.1667 }}</ref>