Hi,

thanks for your answers. Actually I know the mechanics/differences, I just
wanted to be sure that these discrepancies were due to different ways these
effects were tested/presented in lm and aov outputs, i.e. due to the
presence of interactions and/or more than one fixed term in the model. As
Joshua pointed out in case of two-level terms t-test and F-test are
mathematically equivalent (F follows squared t_n distr with df equal 1 and
n). I'm quite happy to know that apparently there's no other (more technical
;)) explanation.

Cheers,
Szymek

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