matching stimulus condition

[ontinglo]

hi all, i am running an experiment about face impression formation, the face stimuli are categorized into different genders and races. they are randomly presented to each participant so he/she would make a response on each face stimulus. participants' race and gender are recorded before and i want to record whether the face is in "sameRace or diffRace" and "sameSex or "diffSex" as the participants', therefore, i try to write the following codes to record whether the gender and race of the face stimulus match the participant's gender and race, I tried both methods but the output does not work. would you please help me spot out the problem? thank you so much

var ExptFaceimg = {
type: 'image-keyboard-response',
stimulus: jsPsych.timelineVariable('target_faceimg'),
trial_duration: 600,
response_ends_trial: false,
data: {
trial_set: 'face',
face_ID: jsPsych.timelineVariable('face_id'),
face_Sex: jsPsych.timelineVariable('face_sex'),
face_ethnic: jsPsych.timelineVariable('ethnic'),
},
on_finish: function(data) {
if (data.face_Sex == data.Gender) {
data.GenderMatch = "sameSex";
} else {
data.GenderMatch = "diffSex";
}
if (jsPsych.pluginAPI.compareKeys(data.face_ethnic, data.ethnicity)) {
data.RaceMatch = "sameRace";
} else {
data.RaceMatch = "diffRace";
}

//data.face_Sex indicates the sex category of the face stimulus, data.Gender indicates the sex category of the participant
//data.face_ethnic indicates the race category of the face stimulus, data.ethnicity indicates the race category of the participant
},
}

[cslongman]

You will need to add data.Gender to the data file at some point, and this is not done in the part of your script that you shared. You can do this in a number of ways. Here are two suggestions...

1. Add Gender to the data: {} part of the node script. (You will need to have stored their gender as a global variable at some point).
2. Add gender to all entries in the data file by using jsPsych.data.addProperties({Gender: Gender}) (you do this when you collect the participants' gender).

Hope this helps,

Cai

[ontinglo]

Dear Cai

thanks so much!