How to install OpenFace and Extract Facial Features (Head Pose, Eye-gaze, Facial landmarks)

In this post, I will discuss the work I have been doing recently. I needed to extract facial features from the recorded video and for this task, I decided to use OpenFace, an open-source face recognition library. In this post, I am sharing the installation process and tutorial on detecting facial landmarks. Installation I tried … 

 

Tracking Video Watching Behavior using Youtube API

This post offers a simple introduction to recording the student’s video watching behavior for Youtube videos. Youtube has an enormous amount of educational videos that can be embedded easily in learning applications (e.g. web, desktop). As research (Ozan & Ozarslan, 2016) has shown that the video watching behavior contains rich traces of learning behavior, therefore, … 

 

How to compute inter-rater reliability metrics (Cohen’s Kappa, Fleiss’s Kappa, Cronbach Alpha, Krippendorff Alpha, Scott’s Pi, Inter-class correlation) in Python

Recently, I was involved in some annotation processes involving two coders and I needed to compute inter-rater reliability scores. There are multiple measures for calculating the agreement between two or more than two coders/annotators. If you have a question regarding “which measure to use in your case?”, I would suggest reading (Hayes & Krippendorff, 2007) …