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<P class=MsoNormal style="MARGIN: 0cm 0cm 10pt"><FONT face=Calibri size=3>I am currently analysing ERSP data from a concurrent choice task and wondered if the following approach is OK?</FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 10pt"><FONT size=3><FONT face=Calibri><SPAN style="mso-spacerun: yes"> </SPAN>I pre-calculate the Frequency measures and then use the following code to create variables containing the ERSP data:</FONT></FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">STUDY<SPAN style="mso-spacerun: yes"> </SPAN>= pop_erspparams(STUDY, ‘freqrange’, [0 35]);<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">[STUDY erspdata ersptimes erspfreqs] = std_erspplot(STUDY, ALLEEG, ‘channels’, {‘E5’, ‘E6’,’E11’, ‘E12’}, ‘plotsubjects’, ‘on’);<SPAN style="mso-spacerun: yes"> </SPAN>% Frontal cluster of electrodes<o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 10pt"><FONT face=Calibri size=3>I then extract the data for each subject in each condition for the frequency of interest (in this case beta) and the relevant time period:</FONT></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">Fz_choc = erspdata{1,2}(25:54,107:136, 1, 1);<o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">Fz_cigs = erspdata{1,2}(25:54,107:136, 1, 1);<o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="mso-bidi-font-family: 'Courier New'"><FONT size=3><FONT face=Calibri>I then calculate the mean beta power for each subject and condition. This data can then be exported to SPSS for ANOVA analysis along with other behavioural variables etc. Is it OK to average the data in this way?<o:p></o:p></FONT></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="mso-bidi-font-family: 'Courier New'"><o:p><FONT face=Calibri size=3> </FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="mso-bidi-font-family: 'Courier New'"><FONT size=3><FONT face=Calibri>Thanks in advance.<o:p></o:p></FONT></FONT></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="mso-bidi-font-family: 'Courier New'"><o:p><FONT face=Calibri size=3> </FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="mso-bidi-font-family: 'Courier New'"><FONT size=3><FONT face=Calibri>Chris<o:p></o:p></FONT></FONT></SPAN></P></FONT></DIV><br/>
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