ExperimentMFC 2.1. The experiment file

An experiment is defined in a simple text file, which we call an experiment file. The following is an example of such an experiment file. The first two lines have to be typed exactly as in this example, the rest depends on your stimuli, on your response categories, and on the way the experiment is to be presented to the listener. The order of the elements in this file cannot be changed, and nothing can be skipped. The first two lines make the file recognizable for Praat as an ExperimentMFC file; the number 7 is the version number of this type of ExperimentMFC file (Praat can still read older ExperimentMFC files with a lower version number).

"ooTextFile"
"ExperimentMFC 7"
blankWhilePlaying? <no>
stimuliAreSounds? <yes>
stimulusFileNameHead = "Sounds/"
stimulusFileNameTail = ".wav"
stimulusCarrierBefore = "weSayTheWord"
stimulusCarrierAfter = "again"
stimulusInitialSilenceDuration = 0.5 seconds
stimulusMedialSilenceDuration = 0
stimulusFinalSilenceDuration = 0.5 seconds
numberOfDifferentStimuli = 4
    "heed" ""
    "hid" ""
    "hood" ""
    "hud" ""
numberOfReplicationsPerStimulus = 3
breakAfterEvery = 0
randomize = <PermuteBalancedNoDoublets>
startText = "This is a listening experiment.
After hearing a sound, choose the vowel that is most similar to what you heard.

Click to start."
runText = "Choose the vowel that you heard."
pauseText = "You can have a short break if you like. Click to proceed."
endText = "The experiment has finished."
maximumNumberOfReplays = 0
replayButton = 0 0 0 0 "" ""
okButton = 0 0 0 0 "" ""
oopsButton = 0 0 0 0 "" ""
responsesAreSounds? <no> "" "" "" "" 0 0 0
numberOfDifferentResponses = 5
    0.2 0.3 0.7 0.8 "h I d" 40 "" "i"
    0.3 0.4 0.5 0.6 "h E d" 40 "" "e"
    0.4 0.5 0.3 0.4 "h A d" 40 "" "a"
    0.5 0.6 0.5 0.6 "h O d" 40 "" "o"
    0.6 0.7 0.7 0.8 "h U d" 40 "" "u"
numberOfGoodnessCategories = 5
    0.25 0.35 0.10 0.20 "1 (poor)" 24 ""
    0.35 0.45 0.10 0.20 "2" 24 ""
    0.45 0.55 0.10 0.20 "3" 24 ""
    0.55 0.65 0.10 0.20 "4" 24 ""
    0.65 0.75 0.10 0.20 "5 (good)" 24 ""

This experiment will play 4 different stimuli to the listener, each 3 times. Thus, the listener is confronted with 12 trials.

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© ppgb, September 25, 2016