Hi<div><br></div><div>I am running a study to investigate differences between williams syndrome patients and controls in a visual task. I have eight subjects of each population.</div><div><br></div><div>How do I compare the amplitude of the P100 between the populations?</div>
<div><br></div><div>Should i include only one value (the peak around 100ms on each of the subject's average) per subject ? </div><div>It seems to me that if i do this i will only have one value per subject and i am "throwing away" the 100 trials per condition that i have</div>
<div><br></div><div>Isn't there a way that i can compare between populations while retaining within-subject variability?</div><div>Otherwise, how does it compensate to perform 1000 trials instead of 10?</div><div><br>
</div><div>I only know how to do two-level analysis when all subjects perform two conditions for example, thus getting one value of "effect" per subject and moving to the next level...</div><div><br></div><div>Isn't there any paralle of this to two populations?</div>
<div><br></div><div>Hope somebody can help me,</div><div><br></div><div>José Rebola</div>