<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><blockquote type="cite"><div><font class="Apple-style-span" color="#000000"><br></font>well... I would start with taking each 1 of 4 scanning sessions out and<br>see how it goes ;)<br>(since 15%4=3 I guess you have disbalanced presence of conditions across<br>sessions, right?)<br><br></div></blockquote></div><br><div>Do you think I'd be asking about this if that worked? ;-)</div><div><br></div><div>The categories are indeed imbalanced across chunks, which given your previous paragraph is apparently something I need to keep a close eye on. </div><div><br></div><div>Francisco, thanks for your clear explanation and those references look like they will be very useful. </div><div><br></div><div>-Jonas</div><div><br></div><div><br></div><div><div>----</div><div>Jonas Kaplan, Ph.D.<br>Research Assistant Professor<br>Brain & Creativity Institute<br>University of Southern California</div></div></body></html>