<div dir="ltr">More specifically, I was wondering about the recipe for <span style="font-size:12.8000001907349px">a 2x2 mixed between-within-subjects design (with 2 groups of unequal size). </span><div><span style="font-size:12.8000001907349px">For instance, p</span><span style="font-size:12.8000001907349px">rovided I have two groups: the first with subj1 till subj12 (12 participants), and the second with subj21 till subj34 (14 participants), and each participant with 2 conditions. </span><div><div style="font-size:12.8000001907349px">Then for each participant i calculate the difference between the 2 conditions (subjXdiff) (say for instance, the difference in power in each grid point), and then compare the two groups with an indepsamplesT: subj1diff, ... subj12diff versus subj21diff,.. subj34diff.</div><div style="font-size:12.8000001907349px"><br></div><div style="font-size:12.8000001907349px">Would such an <span style="font-size:12.8000001907349px">indepsamplesT test correspond to testing the interaction between group and condition?</span></div><div class="gmail_extra"><br></div><div class="gmail_extra">Thanks,</div><div class="gmail_extra">Yoni</div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Jan 6, 2015 at 9:13 AM, Yoni Levy <span dir="ltr"><<a href="mailto:yoniilevy@gmail.com" target="_blank">yoniilevy@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr">Dear Eric, <div><br></div><div>Following up on the thread from about 2 months ago, in your reply (in FAQs: <a href="http://fieldtrip.fcdonders.nl/faq/how_can_i_test_an_interaction_effect_using_cluster-based_permutation_tests" target="_blank">http://fieldtrip.fcdonders.nl/faq/how_can_i_test_an_interaction_effect_using_cluster-based_permutation_tests</a>), when you mention the mixed between-within-subjects design, I assume that you refer to a design with two subjects groups which are of equal size (e.g. 12 participants vs 12 participants, and not 14 participants vs 12 participants). I assume that in the latter case (unequal groups' size), testing the interaction effect would not be possible; correct? </div><div><br></div><div>Thanks, </div><span class=""><font color="#888888"><div>Yoni</div><div><br></div><div><br></div><div><br></div></font></span></div>
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