# Articles by R on I Should Be Writing: The Musical

### Signal Detection Theory vs. Logistic Regression

July 28, 2019 |

I recently came across a paper that explained the equality between the parameters of signal detection theory (SDT) and the parameters of logistic regression in which the state (“absent”/“present”) is used to predict the response (“yes”/“no”, but also applicable in scale-rating designs) (DeCarlo, 1998; DOI: 10.1037/1082-989X.3.2.186). Here is ...

### (Bootstraping) Follow-Up Contrasts for Within-Subject ANOVAs

May 8, 2019 |

Permutation ANOVA Bootstrapping with car and emmeans 1. Make your data WIIIIIIIIIIDEEEEEEEE 2. Fit your regular model 3. Define the contrast(s) of interest 4. Run the bootstrap Summary So you’ve run an ANOVA and found that your residuals are neither normally distributed, nor homogeneous, or that you are in violation of any ...

### Quidditch: Is It All About the Snitch?

November 24, 2018 |

The Game, the Rules Estimating the Average Game Length Estimating the Rate of Goals Scored Simulating the Games R Setup Equal Teams Unequal (but matched) Teams Conclusion Much has been said about how the game of Quidditch is ruined by the scoring system - specifically how it makes no sense ... [Read more...]

### Examining Inter-Rater Reliability in a Reality Baking Show

October 17, 2018 |

The Format In the blind auditions, candidates have 90 minutes to prepare a dessert, confection or other baked good, which is then sent to the show’s four judges for a blind taste test. The judges don’t see the candidate, and know nothing about him or her, until after they ... [Read more...]

### cheatR: an R package for catching cheaters

July 28, 2018 |

Our idea was to compare each hand-in to all other hand-ins and see the degree of overlap between them. This was achieved using the ngram r-package to break each hand-in into a list of “phrases” and then to count how many times each phrase appeared across a pair of documents1. ...