- Видео 22
- Просмотров 3 030
Matthew Courtney
Казахстан
Добавлен 28 мар 2020
Видео
t Distribution Simulation
Просмотров 578 месяцев назад
In this video I describe the independent sample t-test, how the t-value is calculated, and how we obtain a p-value from a t-value.
Standard Error of the Mean Simulation
Просмотров 228 месяцев назад
In this video I provide a demonstration for the standard error of the mean. I take multiple samples from a known population to develop a profile of possible results. I then show that 2 standard deviations above the mean reflect the upper 95% confidence interval, and -2 standard deviations represents the lower 95% confidence interval.
GAPS CTT Analysis
Просмотров 2510 месяцев назад
This video provides analysts with guidance to undertake classical test theory (CTT) analysis of the GAPS data. Here we check the reliability and item functioning of the Hope, Resilience, and Depression scales. If you are part of the project, feel free to email me and I can provide sample data for you to do the same analysis. Good luck! Dr Matthew Courtney matthew.courtney@nu.edu.kz
PIAAC rmarkdown script
Просмотров 11Год назад
This short video provides an example for how we can use rmarkdown to carry out multiple linear regression for country-level PIAAC data. Our script accounts for 10 plausible values, final sample weights, and 80 replicate weights. The country of interest is Kazkahstan and the outcome of interest is adult Scientific literacy.
PIAAC Regression Analysis with PUF Data: Plausible Values as Independent Variables
Просмотров 32Год назад
In this video I demonstrate how to do PIAAC regression-based analysis using R. I demonstrate how to use the EdSurvey package and also base R to do the same analysis. The rationale for the script is here: docs.google.com/document/d/1T9C1boWzanb6W1cDBxDQBEKzWLE8cUUxVka7yGFdcBU/edit A copy of the R Script is here: docs.google.com/document/d/1WPJr72uXMiDI6Rf8x530Z4_ZRcCUoyTeceh4ilp2aEg/edit The ind...
PIAAC Regression Analysis with PUF Data: Plausible Values as Dependent Variables
Просмотров 85Год назад
In this video I demonstrate how to do PIAAC regression-based analysis using R. I demonstrate how to use the EdSurvey package and also base R to do the same analysis. The rationale for the script is here: docs.google.com/document/d/1T9C1boWzanb6W1cDBxDQBEKzWLE8cUUxVka7yGFdcBU/edit A copy of the R Script is here: docs.google.com/document/d/1cUeT8zhOTA2E6K2FJ7ByqaDdiNqgXd0xV1KqnqIWHao/edit?usp=sha...
PIAAC Descriptives
Просмотров 40Год назад
This video describes how conduct descriptive statistics (M, SEM, SD) for the PIAAC PUF Data: Link to the Rationale for the R Script: docs.google.com/document/d/1S0wpp8bsA4k4RdkQDTErAy2fa5KVK51yHhvBe02NhYg/edit Link to the R Script: docs.google.com/document/d/1AwVAr_UX7RPrPvQIlJIK7L3a9jh5c9Bp61ggAL85FYg/edit?usp=sharing *just copy and paste the full script from google docs into a new R script in...
Describing Nominal, Ordinal, and Continuous Variables in Jamovi
Просмотров 874Год назад
This video provides a brief explanation for how to describe nominal, ordinal, and continuous variables using Jamovi.
Reverse Coding Ordinal Variables in Jamovi
Просмотров 547Год назад
In this video, I describe how to reverse-code semantically-negative items on a scale.
Changing Variable Types in Jamovi
Просмотров 62Год назад
This short video describes how to change variable types in Jamovi.
Introduction to R- The basics
Просмотров 262 года назад
This video introduces users to the basics of RStudio. Highlight, copy, and paste the raw code into RStudio - File - New File - R Script "Source Editor": raw.githubusercontent.com/matthewcourtney/R-code/main/INTRO TO R- The basics.R
How to install R and RStudio
Просмотров 192 года назад
This video provides an explanation about how to install R and then RStudio.
Reasons to learn R for Quant Research
Просмотров 492 года назад
Today, R is the most popular statistical software program (SSP) for conducting quantitative analysis (according to Scopus research records). This video describes 10 reasons why it's useful to learn R for undertaking quantitative research in education.
Rasch Equating Proceedure
Просмотров 5152 года назад
In this video, Dr Courtney explains how to use the autopsych app's fixed anchor equating procedure to place student ability estimates from two test forms on a single scale. This tab takes dichotomously scored item-response matrices and can equate two tests. Other more flexible equating procedures are under development...
Instructions for Many-Facets Rasch (DIF) Tab
Просмотров 1152 года назад
Instructions for Many-Facets Rasch (DIF) Tab
This was so helpful!!! Thank you so much
Hi , thanks for the video ! Is it necessary to delete the original variables after I recoded them ? Thank you ! 😊
Hi, you can keep the original variables in the dataset. Just remember to exclude them when you conduct the analysis.
It's amazing that Unidim tab doesn't just show who scored how many points, but also where they made mistakes and where they need to develop, enabling institutions to see the necessary developmental trajectory, as in here, with these two students likely to benefit from practicing distinguishing specific fractional problems! I am speechless! Amazing, professor Matthew!
The best!
Can you share the metodology report?
Great video! I'm an experienced user but this was very helpful for my first day with R
Thanks. I'm going to try improve resolution though. Will post updated link here. Cheers.