Purpose of this ZEP experiment is to measure a participant's ability to identify (speech) sounds. For each trial a sound is presented. Participant's task is to jugdge whether a prespecified property is present in the stimulus or not. In this case it is if a sentence is negative or positive. Experiment is self-paced, has visual appealing features, and auditory instruction (Dutch).
Reaction time is measured from the critical_word_onset of the critical_word.
This onset time needs to be defined per audio file in the input lists.
Author: Chris van Run (UiL-OTS) labman.gw@uu.nl
Client: Niloofar Hashemzadeh
Supervisors:
- Prof. dr. Frank Wijnen
- Prof. dr. Hugo Quené
- Anne van Leeuwen MA
Stimuli are build up out of pairs. Each pair either carries a negative or a positive type of critical word. Randomisation is such that there are never more than 3 pairs in a row with the same type of critical word.
- Download and install zep (1.12) here for either Windows OS or a Debian based Linux OS.
- Download and unpack this repository
- Run either
windows-terminal.batorlinux-terminal.shto start up a command-line interface within the unpacked repository - You can then start up the experiment by typing:
zep ident_pnorzep-1.12 ident_pn
- Speaker of the audio: Dr. Frans Adriaans..
- https://www.vecteezy.com/ for the original owl artwork that was modified by Chris.
The original stimuli files where in 12,000 Hz because of a manipulation. They are upsampled (using ffmpeg) to 48,000 Hz in order for the audio hardware to support playback.
Zep is a system for implementing and running (psycholinguistic) experiments. Zep delivers auditory, visual and cross modal stimuli, and provides interfacing with external hardware such as eye-trackers and button boxes. It is based on a multipurpose programming language (also called Zep) which enables you to implement not only experiments but other applications as well.
DISCLAIMER
This experiment script is released under the terms of the GNU General Public License (see http://www.gnu.org/licenses/gpl-2.0.html). It is distributed in the hope that it will be useful, but with absolutely no warranty. It is your responsibility to carefully study and test the script before using it with real participants.
- Update output and input lists
- Create visual appealing test-page
- Create visual appealing tutorial page
- Introduce pseudo-randomisation for stimuli
- Credit speaker of audio
- Incorporate stimuli files