Introduction to Cognitive Psychology - Department of Psychological ...

Prof. Greg Francis 8/16/11Types of searches!! (2) serial terminating: target item is compared to eachitem one after the other!! the answer (yes or no) is returned after the target is found orall items are searchedTypes of searches!! (2) serial terminating: target item is compared to eachitem one after the other!! the answer (yes or no) is returned after the target is found orall items are searchedNO5 3 2 9YES5 3 2 9Reaction time isfaster for a yesresponse8888 8 8883333 33Purdue UniversityPurdue UniversityIf self-terminating searchTypes of searches!! (3) serial exhaustive: target item is compared to each!! Go through itemsone-by-one until findtarget!! RT increases with setsize!! YES RT’s shorter thanNO RT’s!! Lines have differentslopesReaction time70060050040030020010001 2 3 4 5 6Set sizeYESNOitem one after the otherNO!! the answer (yes or no) is returned after all items are searched(regardless of whether target is found or not)8885 3 2 98 8 888Purdue UniversityPurdue UniversityTypes of searchesIf exhaustive search!! (3) serial exhaustive: target item is compared to eachitem one after the otherYES!! the answer (yes or no) is returned after all items are searched(regardless of whether target is found or not)3335 3 2 93 33 33Reaction time isthe same for ayes response asfor a noresponse!! Go through everyitem and then reportanswer!! RT’s increases withset size!! YES RT increases thesame as NO RT’s!! Lines are parallelReaction time70060050040030020010001 2 3 4 5 6Set sizeYESNOPurdue UniversityPurdue UniversityPSY 200: Intro. to Cognitive Psychology 2