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Lab Exp ORL KULeuven APEXAPEX pplication for sycho- lectrical periments e APEX 2.0 L. Geurts and J. Wouters, 2000. A concept for a research tool for experiments.

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Presentation on theme: "Lab Exp ORL KULeuven APEXAPEX pplication for sycho- lectrical periments e APEX 2.0 L. Geurts and J. Wouters, 2000. A concept for a research tool for experiments."— Presentation transcript:

1 Lab Exp ORL KULeuven APEXAPEX pplication for sycho- lectrical periments e APEX 2.0 L. Geurts and J. Wouters, A concept for a research tool for experiments with cochlear implant users. Journal of the Acoustical Society of America 108, User friendly: NO programming skills required

2 Lab Exp ORL KULeuven 4 Steps in APEX experiments Stimulus generation Experiment definition Subject performs experiment Analysis of results

3 Lab Exp ORL KULeuven Stimulus generation 1) Wav-files 2) NICStream files (*.quf and *.qic) 3) NIC1-files 4) Laura files Generate them in Matlab using NMT (Cochlear) and own functions Or with other software (Klatt synthesizer, Waveform editing software, self-made software, …)

4 Lab Exp ORL KULeuven Experiment definition Types of experimentsExamples Adaptive ProcedureF0-JND measurement, threshold measurement Constant StimuliPsychometric curve estimation Closed Set IdentificationCVC-words, child- audiometry, scaling tasks Open Set IdentificationSentence SRT, scaling tasks Adjustment ProcedureLoudness balancing, magnitude production

5 Lab Exp ORL KULeuven Experiment definition [device] device=NUCLEUS [stimuli] path=c:\Nucleus\Matlab\_work\ stimulus=ACE_sin1500.quf,defaultstandard stimulus=ACE_sin1000.quf,label=1000 stimulus=ACE_sin1050.quf,label=1050 stimulus=ACE_sin1100.quf,label= [method] start=1050 down=2 up=1 stop=12...

6 Lab Exp ORL KULeuven Subject performs experiment Stimulus playback –CPS (or PPS) and SPrint for Nucleus –Soundcard for wavs –TI C30 for Laura Response input –Mouse –Keyboard –Pen-Pad –Touch Screen Optional feedback

7 Lab Exp ORL KULeuven Results are appended to experiment file Results depend on type of experiment –Mean of last reversals –Psychometric curve –Confusion matrix –Average of adjustments –… Complete detailed results can be outputted –Stimulus – Response pairs Easy Copy and paste to analysis program (Excel, Matlab, SPSS, SAS, …) Analysis of results

8 Lab Exp ORL KULeuven Analysis of results... ****************************************** Following results collected on Thu 26Sep02 Start time = 15:37:39 End time = 15:38:43 Duration = 64 s [confusion matrix] autobalbanaankonijnolifantschoen [stimulus/response pairs] olifantautobalschoenolifantolifant Time Results Compact data Complete data


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