Okan Bulut – Medium

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Towards Data Science

Lexicon-Based Sentiment Analysis Using R

An empirical analysis of sentiments conveyed through public health briefings during the COVID-19 pandemic

14 min readFeb 13, 2024

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Lexicon-Based Sentiment Analysis Using R

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Okan Bulut
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Towards Data Science

Effective Feature Selection: Recursive Feature Elimination Using R

Developing an accurate and yet simple (and interpretable) model in machine learning can be a very challenging task. Depending on the…

10 min readJan 11, 2021

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Effective Feature Selection: Recursive Feature Elimination Using R

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Okan Bulut
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Towards Data Science

Likert Scales: Friend or Foe?

Pitfalls and caveats that survey researchers should know

7 min readAug 4, 2021

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Likert Scales: Friend or Foe?

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Okan Bulut
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Towards Data Science

5 Ways to Effectively Visualize Survey Data Using R

When presented visually, survey results become much more interesting than some numbers squeezed into a boring table. Data visualizations…

10 min readMar 12, 2021

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5 Ways to Effectively Visualize Survey Data Using R

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Okan Bulut
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Towards AI

AI Can Bring Fairness to Assessments but Are We Ready for It?

Last September, I came across an article on The Verge that talks about how a group of seventh-grade students figured out an easy way to…

5 min readFeb 4, 2021

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AI Can Bring Fairness to Assessments but Are We Ready for It?

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Okan Bulut
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Towards AI

How AI Will End the One-Size-Fits-All Approach in Human Assessment

When it comes to human assessment , we happen to be a big fan of the one-size-fits-all approach, which AI will end in the near future…

6 min readJan 28, 2021

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How AI Will End the One-Size-Fits-All Approach in Human Assessment

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Okan Bulut
in
Towards Data Science

Too Many Survey Questions? Let Ant Colony Optimization Handle It.

Are there are too many questions on your survey? Are you worried that your participants may get tired of responding to the questions in…

6 min readJan 20, 2021

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Too Many Survey Questions? Let Ant Colony Optimization Handle It.

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Okan Bulut
in
Towards Data Science

Testing for Measurement Invariance in R

Do your survey questions function similarly for all respondents regardless of their demographic characteristics?

15 min readDec 30, 2020

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Testing for Measurement Invariance in R

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Okan Bulut

Okan Bulut

Professor of data science and psychometrics | Interested in learning analytics, data mining, and ML | Twitter: @drokanbulut | Website: www.okanbulut.com

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