Notebook

Who is the Leading Role in Friends TV Show?

By using the transcript of the Friends TV show, we will analyze the main roles in the show. Also, strongest emotions of the characters are studied. This is a fun way to…

Language Detection & Sentiment Analysis with Local LLMs

In this post we will work on how to automate tasks such as language detection and sentiment analysis with R using an LLM on the local computer.

How to Build a Custom Chat Bot with R

Large language Models (LLMs) are an important part of our daily lives now. We use them for web search, daily tasks, automation etc. Today, we will explore the details of…

Multidimensional IRT for Factor Exploration

This post focuses on multidimensioanl IRT (mIRT) as an exploratory factor analysis method on likert scale data. It is a continuation of the previous post, which was about…

Exploratory Factor Analysis with Likert Scale Data

This post focuses on exploratory factor analysis on likert scale data using the conventional principal axis factoring. It also includes the calculation of ordinal alpha…

Multi-Facet Rasch Models with R

In this post, we’ll explore the Multi-Facet Rasch Model, understand how it works, and demonstrate how to fit this model using R. We’ll also visualize the results to better…

Measurement Invariance

Measurement invariance (MI) is essential in psychometrics to ensure that a test measures the same construct across different sub-groups of the population. Therefore, it is…

Automated Essay Scoring (AES) with R

At the core of Automated Essay Scoring (AES) is natural language processing (NLP) and machine learning. These systems are designed to analyze the text based on a set of…

Top 5 Data Sources

This blog post explains some of the sources that I personally prefer to obtain data. I became aware of most of these sources from Google Data Analytics Certificate program.…

Item difficulty & discrimination: Exploring the psychometric properties using R

ShinyItemAnalysis

This blog post explains the importance of examining item difficulty and discrimination in the development and validation of psychological measures and provides a…

Web scraping with Rvest package

In this post, we will delve into harvesting a web page, Ekşi Sözlük. This doesn’t include the automation of the process. Yet, a completed web application for harvesting Ekşi…

Visualisation of My Personal Google Data (2): My exercise routine

This post is a part of a series that demonstrates how to gain insights from personal Google data. Its purpose is to show how to visualize personal movement data.

Visualisation of My Personal Google Data (1): My Locations

This post is a part of a series that demonstrates how to gain insights from personal Google data. Its purpose is to show how to visualize the locations I visited within a…

Yapısal Eşitlik Modelleme

YEM: ‘Your View on Science’ ölçeğinden elde edilen 2015 PISA Turkiye örneklemi ile bir örnek çalışma. Bu çalışma doktora düzeyi ‘Yapısal Eşitlik Modellemeleri’ dersi…

Test Equating

Equating two test forms: This is a simple test equating study. The data used in this study is simulated from real data. We don’t use the real data for privacy purposes here.

Madde Tepki Kuramı Temelli Madde Analizi

Hem çok kategorili hem de iki kategorili maddeler için MTK temelli madde analizi uygulama süreçleri… Bu çalışma doktora düzeyi ‘Madde Tepki Kuramı’ dersi kapsamında rapor…