Konstantinos I. Bougioukas
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The Cross-Lagged Panel Model: A starting point for understanding longitudinal SEM
Statistics
The cross-lagged panel model (CLPM) is a path analysis model that is typically estimated within the Structural Equation Modeling (SEM) framework for analyzing dynamic associations between variables measured at multiple time points.
Jan 16, 2026
Konstantinos Bougioukas
Perceptron: the first artificial neuron
Statistics
The perceptron is one of the earliest and simplest models of an artificial neuron, introduced first by Warren McCulloch and Walter Pitts in 1943, and later by Frank Rosenblatt in 1958, as a computational approach inspired by biological neurons.
Jan 3, 2026
Konstantinos Bougioukas
Two-sample permutation test: How it works
Statistics
Permutation tests approximate the null distribution of a test statistic by repeatedly resampling the data in a way that is consistent with the null hypothesis.
Dec 15, 2025
Konstantinos Bougioukas
Normal Q-Q plot: A step-by-step approach
visualization
A normal Q-Q plot allows you to visually assess whether your data follow a normal distribution.
Nov 30, 2025
Konstantinos Bougioukas
Our paper is a suggested reading from the University of Cambridge
news
Our work on how to keep up with medical information is a suggested reading from the University of Cambridge
Feb 9, 2024
Konstantinos Bougioukas
Recreation of the most popular covid-track plot using ggplot2
visualization
Full recreation from scratch of the most popular covid-track plot using ggplot2 (Source of the original plot: Financial Times).
Feb 7, 2024
Konstantinos Bougioukas
amstar2Vis: An R package for presenting the critical appraisal of systematic reviews based on the items of AMSTAR 2
paper
We expect the “amstar2Vis” package to be useful for authors of overviews of reviews of healthcare interventions and methodologists who wish to rate and present the overall confidence in the results of the included SRs.
Feb 5, 2024
Konstantinos Bougioukas, Paschalis Karakasis, Konstantinos Pamporis, Emmanouil Bouras, Anna-Bettina Haidich
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