Cross Validated
Shawn Hemelstrand's user avatar
Shawn Hemelstrand's user avatar
Shawn Hemelstrand's user avatar
Shawn Hemelstrand
  • Member for 1 year, 11 months
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About

Background

I am a Ph.D candidate at the Chinese University of Hong Kong (CUHK) who specializes in early developmental literacy, particularly for Chinese and Chinese as a Second Language (CSL). Below are some of my posts at CV that I believe are informative about various themes in statistics.

Mixed Models

Levels within clusters in mixed models (and the k > 5 rule)

Reporting results from mixed models

Theory and data-driven reasons for fixed/random effect selection

Transformation, convergence, and autocorrelation in reaction time mixed models

GAMM model comparisons

Issues with Statistical Significance

Univariate statistical significance vs. practical significance

Bivariate statistical significance with low effect size

Peeking at the data (aka HARKing)

General Topics

The algebra behind regression interactions

Overfitting regressions

Interpreting chi-square tests

On arbitrary rules for outlier removal

Theoretical/practical rationale for regression

History/formulation of ANOVA and post-hoc comparisons

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Top posts
View all questions and answers
All Questions Answers
Score Newest
answer
12
Confused about the notion of overfitting and noisy target function
Sep 3
question
11
Why is the Tukey's IQR not used in the R program?
Feb 4
answer
10
Interpretability for chi-squared test?
Dec 5, 2022
answer
10
Is it ok to run post hoc comparisons if ANOVA is nearly significant?
Mar 6
answer
10
Can I use multiple linear regression with binary output?
Sep 16
answer
10
I have applied many statistical tests to my data, but still cannot determine normality
Sep 12
answer
9
Deleting outliers prior to data splitting or only in the training set?
Aug 11
answer
9
Should I treat these data points as outliers?
Jan 22
answer
9
Reducing threshold p-value in case of statistical tests following data exploration
Oct 29
answer
9
Why do random effects require a minimum # of levels?
Oct 28
Top Meta posts
9
1
9
Programming or data request confusion
9
What is the proper way to delete your own answer?
9
Distribution of question and answer votes on CV
9
How to vote on partial answers?
8
Really confused about this constant edit suggestion
Top network posts
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6
Multiple Regression with Interaction

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