Website van Alex Reuneker over taal, hardlopen, wielrennen en reizen

MATTR added to the Lexical Diversity Calculator

— Posted in Taal & Literatuur by

Last week, I implemented the calculation of MATTR (Moving Average TTR) into the Lexical Diversity Calculator. MATTR calculates the mean TTR for successive windows of a text (Covington & McFall, 2010), getting, at least that is the idea, a more stable indication of lexical diversity. While that’s not entirely the case (see Bestgen, 2025), you can still test it at https://www.reuneker.nl/ld.

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Photo by Sean Nufer on Unsplash

Next: implementing a compression-rate measure to operationalize text repetiveness for what hopefully becomes a project together with Vivien Waszink!

Improvements to the Lexical Diversity Calculator

— Posted in Taal & Literatuur by

In the last couple of days, I've been implementing various improvements to the Lexical Diversity Calculator. Not only did I fix a problem in the calculation of MTLD, which resulted in numbers that were slightly off, but I've also streamlined the calculations and added the calculation of Moving average TTR (MATTR).

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Photo by Siora Photography on Unsplash.

Updates

  • 2025-05-29: Added choice to use natural logarithm or base 10 in calculation Maas's a2, Dugast's U2, and Herdan's C.
  • 2025-05-29: Various improvements to calculations and algorithms; added MATTR.
  • 2025-05-26: Important change to the calculation of MTLD, which was slightly off before due to not averaging the forward and backward algorithm.

Next to this, I'm also working on an R-package to easily calculate several measures of lexical diversity, primarily for a research project I'm envisioning for the near future. Stay tuned! For now, please see the online calculator at https://www.reuneker.nl/ld for the newest version.

Boxplots bij de t-toets

— Posted in Taal & Literatuur by

Wilt u een boxplot bij de t? Flauw, I know, maar dat mag ook wel een keertje. De t-toets-calculator is uitgebreid met boxplots, dus bij elke vergelijking die je nu maakt, verschijnt netjes een grafiek zoals de onderstaande, die hoort bij een vergelijking van (fictieve) examenresultaten.

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Boxplot bij een vergelijking van (fictieve) examenresultaten

Het verschil in de scores op het examen Nederlands van 2VA (m = 7.13; sd = 1.3) en 2VB (m = 5.79; sd = 1.37) is significant (t (27) = 2.71; p < 0.05). Het effect is groot (Cohen's d = 1.01; Cohen, 1988). Dat kun je ook mooi in de grafiek zien; de medianen liggen niet in het bereik van de eerste twee kwartielen (de boxes) en de verdere spreiding (de whiskers) wijken aardig van elkaar af.

Kleine updates voor de chikwadraatcalculator

— Posted in Taal & Literatuur by

De chikwadraattoetscalculator heeft een paar kleine updates ondergaan.

  • 15-4-2025: De resultatentabel wordt omgezet naar ASCII-formaat en meegekopieerd met de rapportage.
  • 12-4-2025: Een p-waarde lager dan 0.001 wordt, conform APA, als p < 0.001 gerapporteerd. Ook is er een knop toegevoegd om voorbeeldwaarden in te voeren.

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Naast de nette HTML-tabel nu ook een te kopiëren tabel in platte tekst (ASCII).

Je kunt de chikwadraatcalculator eenvoudig gebruiken op https://www.reuneker.nl/chi.

Interpolation for treadmill speeds

— Posted in Sport by

I keep finding myself fiddling with treadmill speeds and the calibration thereof. I am fully aware though, that really exact speeds don't matter that much in running/training, but I just find it fascinating. I also kept finding myself calculating intermittent speeds between two calibrated speeds in a very inefficient way. Now I've come to value inefficiency a bit more in the last couple of years (or, better said, I've come to devalue efficiency...), but this task was just to repetitious and, to be frank, boring. That's why I've added an interpolation function to the treadmill calculator.

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Interpolation for calibrated treadmill speeds

With this new function, you can enter two previously calibrated speeds and calculate the 'correct' speeds in between. For instance, when you calculated the true speed of your treadmill at 10 and 16 kph, you can calculate the speeds at 11, 12, 13, 14 and 15 kph. Keep in mind that linear interpolation is used for this, which assumes the deviation of your treadmill is constant. This probably is not an entirely correct assumption, but that's the margins of the margins, I'd say. Anyway, if you find it useful, let me know!

Link: https://www.reuneker.nl/treadmill

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