<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style>
</head>
<body dir="ltr">
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);" class="elementToProof">
<span class="x_elementToProof" style="font-size:12pt;margin:0px;background-color:rgb(255, 255, 255)"><span class="x_ContentPasted0 x_elementToProof ContentPasted0" style="margin:0px;background-color:rgb(255, 255, 255)">Hello FT community,</span></span>
<div class="x_elementToProof" style="font-size:12pt;margin:0px;background-color:rgb(255, 255, 255)">
<span class="x_ContentPasted0" style="margin:0px;background-color:rgb(255, 255, 255)"><br class="ContentPasted0">
</span></div>
<div class="x_elementToProof" style="font-size:12pt;margin:0px;background-color:rgb(255, 255, 255)">
<span class="x_ContentPasted0 ContentPasted0" style="margin:0px;background-color:rgb(255, 255, 255)">I am trying to run a cluster analysis for the first time, but I am a bit unsure about how I need to set up my data for the analysis. For context, I ran an oddball
paradigm to elicit Mismatch Negativity and P3a responses, where I presented a repeating auditory rhythm to listeners, where the standards were all one pitch, but sometimes there was a pitch change that could either occur on beat 4, or beat 5 of the rhythm.
The listeners were primed to hear the rhythm either in groups of two beats (like a march), or groups of three beats (like a waltz).</span><span class="x_ContentPasted0" style="margin:0px;background-color:rgb(255, 255, 255)"><br class="ContentPasted0">
</span></div>
<div class="x_elementToProof" style="font-size:12pt;margin:0px;background-color:rgb(255, 255, 255)">
<span class="x_ContentPasted0" style="margin:0px;background-color:rgb(255, 255, 255)"><br class="ContentPasted0">
</span></div>
<div class="x_elementToProof" style="font-size:12pt;margin:0px;background-color:rgb(255, 255, 255)">
<span class="x_ContentPasted0 ContentPasted0" style="margin:0px;background-color:rgb(255, 255, 255)">So, my design is a 2 (oddball condition: standard or deviant tone) x 2 (beat position: beat 4 or 5) within, x 2 (priming group: march or waltz) between subjects'
design. As I understand from the FT tutorials, for my within-subjects (ignoring priming group), the design matrix for within the groups would be something like: </span><span class="x_ContentPasted0" style="margin:0px;background-color:rgb(255, 255, 255)"><span class="x_ContentPasted1 ContentPasted0" style="font-family:Calibri, sans-serif;margin:0px;color:rgb(36, 36, 36);background-color:rgb(255, 255, 255);display:inline !important">[1
2 3 4 1 2 3 4<span class="ContentPasted0"> </span></span><span class="x_ContentPasted1" style="font-size:14.6667px;font-family:Calibri, sans-serif;margin:0px;color:rgb(36, 36, 36);background-color:rgb(255, 255, 255);display:inline !important"><span class="x_ContentPasted2 ContentPasted0" style="font-size:12pt;margin:0px;background-color:rgb(255, 255, 255);display:inline !important">1
2 3 4 </span><span class="x_ContentPasted2" style="margin:0px;background-color:rgb(255, 255, 255);display:inline !important"><span class="x_ContentPasted3 ContentPasted0" style="font-size:12pt;margin:0px;background-color:rgb(255, 255, 255);display:inline !important">1
2 3 4</span></span></span><span class="x_ContentPasted1 ContentPasted0" style="font-family:Calibri, sans-serif;margin:0px;color:rgb(36, 36, 36);background-color:rgb(255, 255, 255);display:inline !important">; 1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4], for 4 subjects
who each experience a beat 4 standard (cond 1), a beat 4 deviant<span class="ContentPasted0"> </span></span><span class="x_ContentPasted1" style="font-size:14.6667px;font-family:Calibri, sans-serif;margin:0px;color:rgb(36, 36, 36);background-color:rgb(255, 255, 255);display:inline !important"><span class="x_ContentPasted4 ContentPasted0" style="font-size:12pt;margin:0px;background-color:rgb(255, 255, 255);display:inline !important">(cond
2)</span></span><span class="x_ContentPasted1 ContentPasted0" style="font-family:Calibri, sans-serif;margin:0px;color:rgb(36, 36, 36);background-color:rgb(255, 255, 255);display:inline !important">, a beat 5 standard<span class="ContentPasted0"> </span></span><span class="x_ContentPasted1" style="font-size:14.6667px;font-family:Calibri, sans-serif;margin:0px;color:rgb(36, 36, 36);background-color:rgb(255, 255, 255);display:inline !important"><span class="x_ContentPasted5 ContentPasted0" style="font-size:12pt;margin:0px;background-color:rgb(255, 255, 255);display:inline !important">(cond
3)</span></span><span class="x_ContentPasted1 ContentPasted0" style="font-family:Calibri, sans-serif;margin:0px;color:rgb(36, 36, 36);background-color:rgb(255, 255, 255);display:inline !important">, and a beat 5 deviant </span><span class="x_ContentPasted1" style="font-size:14.6667px;font-family:Calibri, sans-serif;margin:0px;color:rgb(36, 36, 36);background-color:rgb(255, 255, 255);display:inline !important"><span class="x_ContentPasted6 ContentPasted0" style="font-size:12pt;margin:0px;background-color:rgb(255, 255, 255);display:inline !important">(cond
4). I just don't know how/if I can implement the priming group condition. Would I just do these cluster analyses as I've outlined, separately for each group? Or is there a way I could add a row or edit my design matrix to include the between-subjects factor?</span></span><br class="ContentPasted0">
</span></div>
<div class="x_elementToProof" style="font-size:12pt;margin:0px;background-color:rgb(255, 255, 255)">
<span class="x_ContentPasted0" style="margin:0px;background-color:rgb(255, 255, 255)"><span class="x_ContentPasted1" style="font-size:14.6667px;font-family:Calibri, sans-serif;margin:0px;color:rgb(36, 36, 36);background-color:rgb(255, 255, 255);display:inline !important"><span class="x_ContentPasted6" style="font-size:12pt;margin:0px;background-color:rgb(255, 255, 255);display:inline !important"><br class="ContentPasted0">
</span></span></span></div>
<span class="x_elementToProof ContentPasted0" style="font-size:12pt;margin:0px;background-color:rgb(255, 255, 255)">Thanks,</span><br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);" class="elementToProof">
<span class="x_elementToProof ContentPasted0" style="font-size:12pt;margin:0px;background-color:rgb(255, 255, 255)"><br>
</span></div>
<div class="elementToProof">
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div id="Signature">
<div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span style="font-family:"Calibri Light","Helvetica Light",sans-serif; font-size:12pt"><i><b>Erica Flaten (She/Her)</b></i></span></div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span style="font-family:Cambria,Georgia,serif; font-size:12pt"><i><b><br>
</b></i></span></div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span style="font-size:12pt; font-family:"Calibri Light","Helvetica Light",sans-serif"><i>PhD Candidate</i></span></div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span style="font-size:12pt; font-family:"Calibri Light","Helvetica Light",sans-serif"><i>Department of Psychology, Neuroscience & Behaviour</i></span></div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<span style="font-size:12pt; font-family:"Calibri Light","Helvetica Light",sans-serif"><i>McMaster University, Canada</i></span></div>
</div>
</div>
</div>
</body>
</html>