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I have fit a time-series count HGAM with environmental covariates as parametric terms and year as a site-varying smooth term. I am wondering if I need to use an alpha threshold of 0.01 to interpret significant p values for the parametric terms, or is a 0.05 threshold appropriate?

Thank you for any help

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  • $\begingroup$ The choice of $\alpha$ is yours, though you should make it before you do your analysis. How worried are you about Type I errors (erroneous rejection of the null hypothesis, i.e. false positives)? $\endgroup$
    – Henry
    Commented May 18, 2023 at 21:12
  • $\begingroup$ Thanks for your answer Henry; I'm not particularly worried about Type I errors, but I know that when interpreting significance of smooth terms in GAMs, an alpha=0.01 is typically used. I'm not sure if this convention also applies to parametric terms in the model though. $\endgroup$
    – Ryan
    Commented May 18, 2023 at 21:18

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