[BlindRUG] Measures of modality: understanding distribution shapes

[Gjalt-Jorn Peters]

Dear BlindRUG readers,

I'm working on revising our first statistics course (in a psychology 
curriculum). We're updating it such that R can be used, to make it 
accessible to blind students.

I'm currently trying to figure out how to let blind students assess 
distribution 'shapes'. They can compute skewness and kurtosis, but it's 
also necessary to assess modality (how many 'mountains' there are). Is 
any of you familiar with any measures for this?

How do you normally assess the 'shape' of a distribution?

Thank you very much in advance, kind regards,

Gjalt-Jorn Peters
Dutch Open University

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