轉(zhuǎn)換加工的ERP研究.pdf

1、首都師范大學碩士學位論文轉(zhuǎn)換加工的ERP研究姓名：孫天義申請學位級別：碩士專業(yè)：基礎心理學指導教師：郭春彥20070529Taskswitchingisthebasicwayinhm’cognitiveactivitiesandtheswitchingpmce≈ismimportantaspectofexecotivecontr01Itwaspresenteda。controllingswitchingⅫ瓣befwecntwotasks

2、whichcompetethe8anlecognitive“％ouf潞inworkingmemorySwitchingcostsrefertOlongerreactiontime8僻：DOlltaskswitchtrials(e辱AB)comparedtOtaskrepeattrials(egAA)ItisnindicatorofexecutivecontroLInthispaperWeresrarchtheneurophysinlog

3、icalmechanismsoftaskswitchinforeknowledgeandnoforeknowledgebytwobehavioralexperimentsandtwoeventrelatedpotentialsexperimentsA“taskswich”lmedigmWasusedinthisstudyTasksconsistedina。impleclass邁cationofa血讎words(aonn／verb)ora

4、igits(oaⅢeven)ParticieantsporformedtwOtaskswhich玳repeated(egA氣BB)orswihched(eg。AB，BA)，Therearetwocontinuedtasksineachtial(taskoneandtasktwo)Thetaskoneinrepeat仃ial8andswitchingtrlais(c導_AAandAB)，andthetasktwoinrepeattrial

5、sandswitchingtrials(c導AAandA勤we∞皿alysedandcompareds印aaatelyThirtyands蝎mduatesparficicantsjoinedthetwobehavioralexperiments，andotherseventeenundergraduatesjoinedthetwoeventrelatedpotentialsexperimentsAstheresultsoftwobeha

6、vioraleⅨperiments：therearesignificantswitchingCOSTSindigittasksandwordtasksinforeknowledgeandnoforeknowledge；Intask∞ctheRTsofthgitsinswitchingtrialsarelongerthanaBpeatedaialsunderforeknowledge80aswordsThebehavioralresult

7、sfromERPexpeginlelltsm硝Ⅱlil盯totheresultsofbehavioralexperimentsIntaskonethere’8amol∞largernegativegoingwaveinswitchingtrialsoomparetepeattrialstmderforeknowledgeandthelatencywasatabout330nu；Ala培囂latenegativegoingslowwave

8、evokedbyswitchingtlials如500800ms；Therepeattasksevokedalargerpositive(alikeP3”thanswitchingtasksUndernoforeknowledgecondition，alsoamo”largernegativegoingwavewiththelatencyofabout330msinswitchingmalscomparetorepeattrialsan

9、drepeattasksevokedalargerpositive(alikeP3b1thanswitchingtasksThecerebralregionstodoworkfordigitsandword$$rcdifferenLThesetmultssuggest：swiehingcOStisaspecialphenomenawithtaskswith；Swichingprocessinvolvesendogenousprepara