实验心理学实验报告信号检测论evalute methodWord文档格式.docx
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实验心理学实验报告信号检测论evalute methodWord文档格式.docx
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2.Method
2.1Subject
4collegestudentsofpsychologydepartmentinCentralChinaNormalUniversityattheageof19to21.Allparticipantsarenormalintelligenceandmemory.Twostudentsamongthemarefemale.
2.2Equipmentormaterial
Twosetsofpicturesandonesetincludes60differentpictureswhichisusedassignal;
theothersetincludes60differentpictureswhichissimilartothefirstsetisusedasnoise.Psykeyprocedure.Keyboardsandcomputers.
2.3Design
Thisiswith-insubjectdesign.Participantsarerequiredtojudgethepicturedisplayedonscreenhadbeenrememberbeforeandthenevaluatetheconvincedegree.
2.4Procedure
1.Theinstructionofexperimentwillshowonthescreen.
2.Intheprocessofremember,60signalswillbedisplayedrandomlyonebyone,andparticipantsneedtorememberthesepicturesascorrectaspossible.
3.Afterthat,wewillenterintotheprocessofjudgment.Inthispart,bothsignalsandnoisewillbemixedanddisplayedrandomlyonebyone.Participantsareaskedtojudgethatwhetherthepictureissignalornotandhowmuchdegreedotheycertain.
4.1represents0%surewhichmeanstotallysureaboutthattheyhaven’tseenthepicture.2means25%sure;
3means50%sure;
4means75%sureand5representstheytotallysurethattheyhaveseenthepicture.Aftermakingadecision,theyshouldpressthecorrespondingnumberingkey.
5.Leadparticipantsreadtheinstructionandmakesurethattheyunderstandtherequirementsoftheexperimentandcorrectwaytooperatethecomputers.
6.Computerswillrecordthereactionofparticipants.
7.Collectdataandanalyzeit.
3.Results
3.1originaltable
Participant1:
1
2
3
4
5
Total
SN
N
6
50
49
60
Participant2:
37
11
45
Participant3:
55
7
44
Tablesabovedescribedthereactionofeachparticipantinexperiment.
3.1sortedtable-thenumberofsignalofnoisejudgedbyparticipantunderdifferentconfidencedegree
Participant1:
1+2+3+4+5
2+3+4+5
3+4+5
4+5
54
10
53
participant2:
57
23
12
51
47
Tablesabovecountedthetotalreactionsofeachparticipantunderdifferentinternals.
3.2participants’judgmenttostimulateunderfourcertainlevels
C1
C2
C3
C4
hit
false
0.82
0.03
0.88
0.07
0.9
0.17
0.75
0.1
0.85
0.2
0.95
0.38
Participant3
0.73
0.78
0.05
0.08
Evenundertheforthcriteria,thefalsereactionisverylowwhichisonly0.08.Itsuggeststhatthecriterionofthirdparticipantishigh.Highercriterionleadshimorhertomoredifficulttomake“yes”decision.Inthatcase,heorshehasfewerfalserateswhilehaslowerhitrateeither.
3.3ANOVA
participant
SS
Meansquare
df
D’
β
F
Sig.
438.325
297.675
119
249.738
.000
421.967
276.033
223.197
383.592
205.408
136.029
Comparethesethreeparticipants’reaction,wecaninformthatallp=.000<
.05,whichmeansthreeparticipantsaredifferentfromeachothersignificantly.
3.5ROCCurve
AccordingtotheROCCurveabove,wecanknowthateventhoughthreeROCCurveisseparatetoeachotherwhilethetendencyofROCCurveissimilartoeachother.
Thisisthefirstparticipant’sROCCurve,andwecanseethatthelineisfarfromupper-leftpoint,whichmeanshisorhersensibilityisnotverygood,whilethisphenomenonisuncommon.
Thisisthesecondparticipant’sROCCurve,andwecaninformthathisorhersensibilityisbetterthanthefirstonewhichisontheusuallevel.
Thisisthethirdparticipant’sROCCurve,andIfinditquitedifferentfromothers.Iusedthesamewaytodealwithdataanddrawthepicture,whileIgotdifferentresult.Ihavenoideaaboutit.
Itriedanotherwaytodrawthesepicture,andIgotthis.
4.Discussion
4.1Discussingeneral.
Accordingtoallpicturesabove,wecaneasilyfindthatlinesaresmoothandgentle.ROCCurve’sslopeisshiftingdown.Withthedecreasingofcriteria,falserateofparticipantsincreasesignificantly.
4.2Othereffect.
Therealresultisdifferentfromtheory.Maybethatduetosomeextraneousvariablesaremakingdifference,suchasthepositionparticipantwereorlastingtimeandwayofstimulatedisplayed,evenenvironmentaroundparticipantsandemotionwouldhaveaneffectonresult.
4.3Differencebetweenparticipants
Wecaneasilyinformthatdifferentparticipanthasdifferentsensibility.Participants’owncriterionsmaybethemainreasonwhythishappen.Highercriterialeadtolowerhitrateandfalserateandinreverse.
4.5comparedwithothermethod
Comparedwiththeothermethodofsignaldetectiontheory,usingevaluatemethodcanobtainmoreinformationofparticipantatthesametime.Wecangetmorethantwocriteria,andinthatcase,wecandrawROClinesafteroneexperiment.
5.Conclusion
Signaldetectiontheory–evaluatemethodisausefulwaytomeasuresensibilityanddistinguishsensibilityfromthreshod.
6.Reference
BomingYang,心理实验纲要,P42-61
7.Appendix(可将原始数据单附于页面后)
=====结果分数=====
----------------------------------
类型 1 2 3 4 5 合计
信号 6 0 1 4 49 60
噪音 50 5 1 2 2 60
=====备 注=====
测验耗时:
691秒
[参数表]
图片评价时间(毫秒)=5000
图片呈现时间(毫秒)=2000
图片间隔时间(毫秒)=1000
=====详细反应=====
图片名称类型判断
噪音1
噪音2
信号5
信号1
信号4
噪音5
噪音4
噪音3
信号3
=====结果分数=====(男)
信号 3 4 2 6 45 60
噪音 37 11 6 0 6 60
593秒
信号2
信号 6 7 0 3 44 60
噪音 55 2 1 2 0 60
656秒
信号
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