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PNS0224

Dealing with some complexities of GLMs

Unit 5: Dealing with some complexities of GLMs Teacher: Matt Low (matthew.low@slu.se ). May 31 and June 1 2021



1. Understanding and comparing the Normal, Poisson and Binomial distributions.

2. What is overdispersion and what effect does it have on your results? How can it be quantified, corrected for, and what does it all mean biologically?

3. What is zero inflation? How zero-inflation can be thought of as a form of overdispersion (and hence dealt with using the previous solutions). How zero- inflation can be considered as a combination of two separate processes and modelled using either hurdle models or mixture models.



The course activites includes initial readings, classroom discussions, hands-on activities, followed by home exercises. This unit corresponds to one theme/workshop and is planned for two days, equaling one credit (ca 27 hours of work for the PhD student). Example datasets will be provided but students could use their own datasets as well.

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