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Hi there! Welcome to Statistics and Theory, a YouTube channel dedicated to promoting and propagating anything scientific about language in general and quantitative and assessment methods in particular.

You will find a range of videos on topics such as language comprehension, language production, quantitative techniques, and language testing methods that will be of interest to the general public and/or specialists. 

In addition, there are three types of memberships available. Through your membership, you will support the channel and have a better chance to discuss your research questions, study design, and publication questions with us. 

As always, please free to contact me if you have any questions :-) 

Best wishes,
Vahid Aryadoust 
Statistics & Theory

Tags

Language
Assessment
Rasch
multivariate analysis
ANOVA
ANCOVA
MANOVA
MANCOVA
SPSS
Winsteps
IRT
item response theory
factor analysis
path analysis
regression
structural equation modeling
generative AI
artificial intelligence
ChatGPT

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Featured video

Statistics and Theory

Vahid Aryadoust, PhD

11,702 views

4 years ago

Videos
Vahid Aryadoust, PhD
Machine Learning Workshop Part 2 | Neural Networks & Regression
01:57:45
Machine Learning Workshop Part 2 | Neural Networks & Regression

894 views

2 months ago

Vahid Aryadoust, PhD
ChatGPT-4o vs. ChatGPT-o1 vs. Traditional Software: Regression Showdown!
00:15:00
ChatGPT-4o vs. ChatGPT-o1 vs. Traditional Software: Regression Showdown!

1,416 views

4 months ago

Vahid Aryadoust, PhD
What is “research waste” in applied linguistics research? | Interface 4
01:27:12
What is “research waste” in applied linguistics research? | Interface 4

542 views

6 months ago

Vahid Aryadoust, PhD
Machine Learning Workshop Part 1 | Linear Regression with JASP
01:53:53
Machine Learning Workshop Part 1 | Linear Regression with JASP

1,770 views

6 months ago

Vahid Aryadoust, PhD
The Mode and median | Knowledge bites #3
00:02:36
The Mode and median | Knowledge bites #3

281 views

7 months ago

Vahid Aryadoust, PhD
What is the mean of a sample? | Knowledge bites 2
00:02:18
What is the mean of a sample? | Knowledge bites 2

197 views

7 months ago

Vahid Aryadoust, PhD
Population and Sample | Knowledge Bites 1
00:01:49
Population and Sample | Knowledge Bites 1

406 views

7 months ago

Vahid Aryadoust, PhD
Meta-analysis 2.0 in the Language Sciences: Current Advances in Synthetic Methods | Interface 3
01:32:27
Meta-analysis 2.0 in the Language Sciences: Current Advances in Synthetic Methods | Interface 3

872 views

8 months ago

Vahid Aryadoust, PhD
Generative Artificial Intelligence in Language Assessment | 15th Harvard-China Education Symposium
00:26:06
Generative Artificial Intelligence in Language Assessment | 15th Harvard-China Education Symposium

1,261 views

9 months ago

Vahid Aryadoust, PhD
Partial and complete mediation in path analysis in Jamovi
00:14:32
Partial and complete mediation in path analysis in Jamovi

1,963 views

10 months ago

Vahid Aryadoust, PhD
Path analysis with mediation effects in Jamovi (with guidelines for writing journal articles)
00:31:40
Path analysis with mediation effects in Jamovi (with guidelines for writing journal articles)

3,087 views

10 months ago

Vahid Aryadoust, PhD
Multicategorical X continuous variables interaction in linear regression
00:25:14
Multicategorical X continuous variables interaction in linear regression

1,872 views

11 months ago

Popular videos
Vahid Aryadoust, PhD
Structural equation modeling using AMOS
00:24:40
Structural equation modeling using AMOS

157,239 views

3 years ago

Vahid Aryadoust, PhD
Converting Excel to SPSS and transforming data
00:07:06
Converting Excel to SPSS and transforming data

89,338 views

4 years ago

Vahid Aryadoust, PhD
Checking normality using skewness, kurtosis, Kolmogorov–Smirnov and Shapiro-Wilk tests
00:16:23
Checking normality using skewness, kurtosis, Kolmogorov–Smirnov and Shapiro-Wilk tests

89,292 views

4 years ago

Vahid Aryadoust, PhD
Research Methods 1: Sampling Techniques
00:19:46
Research Methods 1: Sampling Techniques

86,930 views

4 years ago

Vahid Aryadoust, PhD
Factor Analysis and Principal Component Analysis Using SPSS | A User-Friendly Guide
00:30:36
Factor Analysis and Principal Component Analysis Using SPSS | A User-Friendly Guide

71,078 views

4 years ago

Vahid Aryadoust, PhD
Mean, Skewness, Kurtosis, and Confidence Intervals in Excel | Quick and Effective
00:12:12
Mean, Skewness, Kurtosis, and Confidence Intervals in Excel | Quick and Effective

68,309 views

4 years ago

Vahid Aryadoust, PhD
Reliability 4: Cohen's Kappa and inter-rater agreement
00:18:25
Reliability 4: Cohen's Kappa and inter-rater agreement

63,947 views

4 years ago

Vahid Aryadoust, PhD
Repeated measures ANOVA 2: A within- and between-subjects design
00:22:05
Repeated measures ANOVA 2: A within- and between-subjects design

61,877 views

4 years ago

Vahid Aryadoust, PhD
Getting Started with RStudio and R | Part 1
00:08:55
Getting Started with RStudio and R | Part 1

58,235 views

2 years ago

Vahid Aryadoust, PhD
ANOVA 7: How to report the results of Factorial ANOVA in your paper
00:13:37
ANOVA 7: How to report the results of Factorial ANOVA in your paper

43,097 views

4 years ago

Vahid Aryadoust, PhD
Repeated measures ANOVA 1: A within-subjects design
00:28:17
Repeated measures ANOVA 1: A within-subjects design

42,347 views

4 years ago

Vahid Aryadoust, PhD
Introducing Artificial Neural Networks in SPSS | Analysis and Interpretation
00:22:37
Introducing Artificial Neural Networks in SPSS | Analysis and Interpretation

35,610 views

3 years ago

Rasch Measurement
Vahid Aryadoust, PhD
Rasch Measurement Using WINSTEPS | Essentials for a Quick & Effective Analysis
00:33:21
Rasch Measurement Using WINSTEPS | Essentials for a Quick & Effective Analysis

24,239 views

4 years ago

Vahid Aryadoust, PhD
How to validate a Likert-scale questionnaire using Rasch analysis | A Quick and Effective Guide
00:35:25
How to validate a Likert-scale questionnaire using Rasch analysis | A Quick and Effective Guide

22,043 views

4 years ago

Vahid Aryadoust, PhD
Rasch measurement using SPSS
00:20:02
Rasch measurement using SPSS

17,504 views

4 years ago

Vahid Aryadoust, PhD
Many-Facet Rasch Measurement Using Facets Software
00:38:09
Many-Facet Rasch Measurement Using Facets Software

7,427 views

4 years ago

Vahid Aryadoust, PhD
Rasch Measurement using WINSTEPS
00:28:55
Rasch Measurement using WINSTEPS

20,267 views

8 years ago

Vahid Aryadoust, PhD
Rasch measurement unidimensionality and local independence (Part 1)
00:06:51
Rasch measurement unidimensionality and local independence (Part 1)

10,926 views

7 years ago

Vahid Aryadoust, PhD
Rasch measurement unidimensionality and local independence (Part 2)
00:08:27
Rasch measurement unidimensionality and local independence (Part 2)

8,498 views

7 years ago

Vahid Aryadoust, PhD
The Rasch Model Wright Map Using Winsteps's New Feature
00:23:11
The Rasch Model Wright Map Using Winsteps's New Feature

3,688 views

4 years ago

Vahid Aryadoust, PhD
Rasch measurement for repeated measures and experimental designs | Stacking
00:31:04
Rasch measurement for repeated measures and experimental designs | Stacking

2,822 views

4 years ago

Vahid Aryadoust, PhD
Rasch measurement using user-friendly jMetrik | Powerful free software
00:21:40
Rasch measurement using user-friendly jMetrik | Powerful free software

7,366 views

4 years ago

Vahid Aryadoust, PhD
The SPSS Item response theory (IRT) analysis | New
00:23:03
The SPSS Item response theory (IRT) analysis | New

20,378 views

4 years ago

Vahid Aryadoust, PhD
Multidimensional Rasch measurement with ConQuest Software | A quick and effective guide
00:27:54
Multidimensional Rasch measurement with ConQuest Software | A quick and effective guide

4,332 views

4 years ago

Scientometrics & Bibliometrics
Vahid Aryadoust, PhD
Scientometrics analysis 1: Creating datasets from the Web of Science
00:24:50
Scientometrics analysis 1: Creating datasets from the Web of Science

18,449 views

4 years ago

Vahid Aryadoust, PhD
Scientometrics analysis 2: An introduction
00:18:38
Scientometrics analysis 2: An introduction

9,941 views

4 years ago

Vahid Aryadoust, PhD
Scientometrics analysis through CiteSpace 3: Document co-citation analysis
00:22:08
Scientometrics analysis through CiteSpace 3: Document co-citation analysis

20,309 views

4 years ago

Vahid Aryadoust, PhD
Scientometrics analysis through CiteSpace 4: Document co-citation analysis & visualization
00:30:45
Scientometrics analysis through CiteSpace 4: Document co-citation analysis & visualization

11,879 views

4 years ago

Vahid Aryadoust, PhD
Scientometrics analysis through CiteSpace 5: Timeline & cluster view
00:16:23
Scientometrics analysis through CiteSpace 5: Timeline & cluster view

8,713 views

4 years ago

Vahid Aryadoust, PhD
Dynamicity of Measurement and Validity Research in Language Assessment and SLA
00:37:12
Dynamicity of Measurement and Validity Research in Language Assessment and SLA

1,921 views

4 years ago

Repeated Measures ANOVA
Vahid Aryadoust, PhD
Repeated measures ANOVA 5: A 2X2 repeated measures Example (Part 2)
00:16:13
Repeated measures ANOVA 5: A 2X2 repeated measures Example (Part 2)

3,719 views

4 years ago

Vahid Aryadoust, PhD
Repeated measures ANOVA 4: A 2X2 repeated measures Example (Part 1)
00:20:29
Repeated measures ANOVA 4: A 2X2 repeated measures Example (Part 1)

7,762 views

4 years ago

Vahid Aryadoust, PhD
Repeated measures ANOVA 3: A within- and between-subjects design
00:06:50
Repeated measures ANOVA 3: A within- and between-subjects design

11,463 views

4 years ago

Vahid Aryadoust, PhD
Repeated measures ANOVA 2: A within- and between-subjects design
00:22:05
Repeated measures ANOVA 2: A within- and between-subjects design

61,877 views

4 years ago

Vahid Aryadoust, PhD
Repeated measures ANOVA 1: A within-subjects design
00:28:17
Repeated measures ANOVA 1: A within-subjects design

42,347 views

4 years ago

Vahid Aryadoust, PhD
ANOVA in RStudio Part 1 | Visualization, Normality Assumption, Homogeneity of Variance
00:24:23
ANOVA in RStudio Part 1 | Visualization, Normality Assumption, Homogeneity of Variance

9,673 views

2 years ago

Vahid Aryadoust, PhD
ANOVA in RStudio Part 2 | ANOVA, Model Fitting, Effect Size, Post-Hoc Analysis & Visualization
00:23:44
ANOVA in RStudio Part 2 | ANOVA, Model Fitting, Effect Size, Post-Hoc Analysis & Visualization

4,439 views

2 years ago

Reliability analysis
Vahid Aryadoust, PhD
Reliability 1: External reliability and rater reliability and agreement
00:18:48
Reliability 1: External reliability and rater reliability and agreement

9,267 views

4 years ago

Vahid Aryadoust, PhD
Reliability 2: Cronbach's alpha and internal reliability
00:14:19
Reliability 2: Cronbach's alpha and internal reliability

4,850 views

4 years ago

Vahid Aryadoust, PhD
Reliability 3: Cronbach's alpha and internal reliability
00:10:44
Reliability 3: Cronbach's alpha and internal reliability

2,581 views

4 years ago

Vahid Aryadoust, PhD
Reliability 4: Cohen's Kappa and inter-rater agreement
00:18:25
Reliability 4: Cohen's Kappa and inter-rater agreement

63,947 views

4 years ago

Vahid Aryadoust, PhD
Inter-rater reliability analysis using McNemar test and Cohen's Kappa in SPSS
00:12:00
Inter-rater reliability analysis using McNemar test and Cohen's Kappa in SPSS

4,694 views

4 years ago

Vahid Aryadoust, PhD
Cronbach's α and McDonald’s ω reliability coefficients in Jamovi | Theory and practice
00:30:09
Cronbach's α and McDonald’s ω reliability coefficients in Jamovi | Theory and practice

4,589 views

2 years ago

Learn with Experts
Vahid Aryadoust, PhD
Learn with Experts 1: Professor Dan Douglas on Testing for Specific Purposes
00:15:12
Learn with Experts 1: Professor Dan Douglas on Testing for Specific Purposes

2,438 views

4 years ago

Vahid Aryadoust, PhD
An introduction to Rasch Measurement by Professor William Boone
00:29:04
An introduction to Rasch Measurement by Professor William Boone

15,672 views

4 years ago

Vahid Aryadoust, PhD
Effects of Poverty on the Brain and Academic Performance
00:51:33
Effects of Poverty on the Brain and Academic Performance

2,504 views

3 years ago

Vahid Aryadoust, PhD
Task-based assessment vs competency-based assessment
00:11:11
Task-based assessment vs competency-based assessment

3,012 views

3 years ago

What is Language?
Vahid Aryadoust, PhD
What is Language? (Part 3)
00:05:04
What is Language? (Part 3)

3,045 views

4 years ago

Vahid Aryadoust, PhD
What is Language? Enter Saussure (Part 2)
00:05:01
What is Language? Enter Saussure (Part 2)

6,637 views

4 years ago

Vahid Aryadoust, PhD
What is Language? (Part 1)
00:04:39
What is Language? (Part 1)

18,649 views

4 years ago

Vahid Aryadoust, PhD
Is language unique to Homo sapiens? | Two radically different views | (Knowledge Bytes 1)
00:10:44
Is language unique to Homo sapiens? | Two radically different views | (Knowledge Bytes 1)

1,256 views

4 years ago