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FACE EMOTION PARADIGM
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Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC
Date: 11-11-2013
last updated: 11-11-2019 by K. Borchert (katjab@millisecond.com) for Millisecond Software, LLC
Script Copyright © 11-11-2019 Millisecond Software
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BACKGROUND INFO
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This script implements a Face Emotion Paradigm; a task for Emotion Recognition of different
ethnic groups. The implemented procedure is based on:
Beaupre´, M.G., Hess, U. (2005). Cross-cultural emotion recognition among Canadian ethnic groups.
Journal of Cross-Cultural Psychology 36, 355–370.
Note: this script runs with placeholder stimuli. To get access to the original stimuli, please
contact Dr. Ursula Hess directly.
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TASK DESCRIPTION
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Participants are presented pictures of people with different facial expressions.
Afterwards they are asked to
1) rate the facial expression on 10 emotion dimensions/profiles
2) rate the likelihood of the daily occurrence of the presented facial expression
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DURATION
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the default set-up of the script takes appr. 45 minutes to complete
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DATA FILE INFORMATION
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The default data stored in the data files are:
(1) Raw data file: 'faceemotion_raw*.iqdat' (a separate file for each participant)
build: The specific Inquisit version used (the 'build') that was run
computer.platform: the platform the script was run on (win/mac/ios/android)
date, time, date and time script was run
subject, group, with the current subject/groupnumber
script.sessionid: with the current session id
blockcode, blocknum: the name and number of the current block (built-in Inquisit variable)
trialcode, trialnum: the name and number of the currently recorded trial (built-in Inquisit variable)
Note: trialnum is a built-in Inquisit variable; it counts all trials run; even those
that do not store data to the data file.
parameters.group: 1 = run with half design set 1
2 = run with half design set 2
emotion: stores the current emotion (e.g. "anger")
ethnicity: stores the ethnicity of the current encoder (default)
1 = Subsaharan African
2 = Chinese
3 = French Canadian
Note: not accurate for practice trials
gender: stores the gender of the current encoder (default)
1 = Female
2 = Male
Note: not accurate for practice trials
encoder: stores the "itemnumber" of the current encoder (1-12)
intensity: stores the current intensity level of the emotion
Note: by default, this script runs only 1 intensity level
stimulusitem: stores the current stimulus (picture)
emotion_accuracy: 1 = target category was rated the highest of all categories in the emotion profile task
0 = otherwise
Note: values.emotion_accuracy
Beaupre´, M.G., Hess, U. (2005): "The level of accuracy was calculated
from the intensity scales such that when the target scale received the highest score,
judgment was considered as accurate and a score of 1 was given; otherwise, a score of 0 was
given." (p.359/360)
daily_occurence: the selected probability that presented emotion is presented on a daily basis
slider.anger.response -
slider.surprise.response: the selected responses for the 10 questions of the emotion profile tasks
(2) Summary data file: 'faceemotion_summary*.iqdat' (a separate file for each participant)
computer.platform: the platform the script was run on (win/mac/ios/android)
script.startdate: date script was run
script.starttime: time script was started
script.subjectid: assigned subject id number
script.groupid: assigned group id number
script.sessionid: assigned session id number
script.elapsedtime: time it took to run script (in ms); measured from onset to offset of script
script.completed: 0 = script was not completed (prematurely aborted);
1 = script was completed (all conditions run)
parameters.group: 1 = run with half design set 1
2 = run with half design set 2
prop_emotion_accuracy: proportion of emotion profile responses that rated the target emotion the highest
(across all emotions; not counting neutral)
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EXPERIMENTAL SET-UP
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(A )Complete design:
3 encoder ethnicities (e.g. French Canadian, Subsaharan Africans, Chinese) x 2 genders x 6 emotions (anger, happiness, sadness, fear, disgust, shame)
x 4 encoders = 144 trials
Half design: the total set was broken down into 2 sets in Beaupre´& Hess (2005). Each set was made up of expressions by 2 males and 2 females from each cultural group (not 4).
=> 3 encoder ethnicities (French Canadian, Subsaharan Africans, Chinese) x 2 genders x 6 emotions (anger, happiness, sadness, fear, disgust, shame)
x 2 encoders = 72 trials
=> sets were counterbalanced between participants in Beaupre´ & Hess (2005).
!NOTE: this script implements only the half design. To run the complete design, dublicate the script with the second set of stimuli and set
Editable Parameters -> parameters.group = 2.
!NOTE: this script runs only 1 intensity level for each emotion. To add more intensity levels, go to section Editable Stimuli and follow
further instructions
!NOTE: this script runs 3 encoder ethnicities. To add more, follow instructions under section Editable Stimuli
(B) SET-UP
- 1 practice block with 2 emotion trials (e.g. encoders not of the current set)
- 1 test block: selects one of the 6 emotion trials randomly without replacement
Trial Sequence: 72 trials (half design)
Picture (default: 5000ms) -> Emotion Profile (order of questions is random) -> Daily Occurrence question -> Intertrial Interval (default: 0ms)
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STIMULI
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this script runs with placeholder stimuli. To get access to the original stimuli, please
contact Dr. Ursula Hess directly. The stimuli can be edited under section Editable Stimuli.
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INSTRUCTIONS
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The instructions are not original and can be easily edited unter section Editable Instructions
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EDITABLE CODE
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check below for (relatively) easily editable parameters, stimuli, instructions etc.
Keep in mind that you can use this script as a template and therefore always "mess" with the entire code
to further customize your experiment.
The parameters you can change are:
check below for (relatively) easily editable parameters, stimuli, instructions etc.
Keep in mind that you can use this script as a template and therefore always "mess" with the entire code to further customize your experiment.
The parameters you can change are:
/group: 1 = run with half design set 1
2 = run with half design set 2
/pictureheight: set the height (width will be adjusted automatically) of the pictures (default: 50% of screen height)
durations:
/stimulusduration: set the duration of the stimuli (pictures) in ms (default: 5000ms)
/ITI: set the duration of the intertrial interval in ms (default: 0ms)
/emotionprofile_instruction: edit the instructions for the emotionprofile task
/dailyoccurrence_instruction: edit the instructions for the daily-occurrence task