Choosing The Best Model
Choice of an appropriate model is critical for the production of good phylogenetic analyses. Both underparameterised or overly restrictive models may produce aberrant behaviour when their underlying assumptions are violated, while overly complex or overparameterised models require long run times and their parameters may be overfit. The most common method of model selection is the "Likelihood Ratio Test" which produces an estimate of the fit between the model and the data, but as an alternative the Akaike Information Criterion or the Bayesian Information Criterion can be used. Model selection computer programs are available.
Read more about this topic: Quantitative Comparative Linguistics
Famous quotes containing the words choosing the, choosing and/or model:
“Constantly choosing the lesser of two evils is still choosing evil.”
—Jerry Garcia (1942–1995)
“Some of the smartest women in the country said that they’re too embarrassed to attend their reunions at Harvard Business School if they have dropped out of the work force, left the fast track by choosing part-time work, or decided to follow anything other than the standard male career path.”
—Deborah J. Swiss (20th century)
“The playing adult steps sideward into another reality; the playing child advances forward to new stages of mastery....Child’s play is the infantile form of the human ability to deal with experience by creating model situations and to master reality by experiment and planning.”
—Erik H. Erikson (20th century)