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<p class="MsoNormal">Dear EEGLAB list,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have pre-processed my data with EEGLAB version 13.5.4b in Matlab R2014a and used the default FIR filter to filter my data, setting the lower edge to 0.5 Hz. In
<a href="https://sccn.ucsd.edu/wiki/Makoto%27s_preprocessing_pipeline#High-pass_filter_the_data_at_1-Hz_.28for_ICA.2C_ASR.2C_and_CleanLine.29">
Makoto’s preprocessing pipeline</a> I have read that “1-Hz cutoff in EEGLAB is actually 1-Hz pass-band edge, and actually -6dB point, which is a standard definition of 'cut off frequency', is at 0.5 Hz.”
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Apologies if these might seem silly questions:<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">      
</span></span><![endif]>Does this mean that the ‘cut off frequency’ is at 0.5 Hz for a 1 Hz high pass?
<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">      
</span></span><![endif]>What would the ‘cut off frequency’ be for the 0.5 Hz high pass filter I used in EEGLAB?
<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">      
</span></span><![endif]>And what value would it be correct to report in a publication?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Many thanks in advance.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best wishes,<o:p></o:p></p>
<p class="MsoNormal">Giorgia<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="color:black;mso-fareast-language:EN-GB">Giorgia Michelini<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="color:black;mso-fareast-language:EN-GB">PhD student<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black;mso-fareast-language:EN-GB">MRC Social, Genetic and Developmental Psychiatry Centre<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black;mso-fareast-language:EN-GB">Institute of Psychiatry, Psychology and Neuroscience, King's College London<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black;mso-fareast-language:EN-GB">De Crespigny Park, London, SE5 8AF, UK<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black;mso-fareast-language:EN-GB">Email: <a href="mailto:giorgia.michelini@kcl.ac.uk">
<span style="color:blue">giorgia.michelini@kcl.ac.uk</span></a> <o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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