[Eeglablist] Gratton ocular correction issue

[Scott Makeig]

We routinely and quite successfully use ICA decomposition for this. Both
CORRMAP and a new function by Nima Bigdely-Shamlo are quite good, we
believe, at indicating which ICs (independent components) account for eye
movements...

Scott Makeig

On Tue, Oct 16, 2012 at 10:09 AM, Ricardo Moura <ricardoojm at gmail.com>wrote:

> By the way, does anyone know a plugin for ocular correction which can be
> aplyed to continuous data?
> I've checked and this plugin reported in the first email only works for
> segmented data.
>
> Best,
> Ricardo
>
>
> On 11 October 2012 22:36, Arnaud Delorme <arno at ucsd.edu> wrote:
>
>> Dear Le,
>>
>> the correction method you mention is an EEGLAB plugin so you might want
>> to contact the authors of the plugin directly.
>> The problem might be that the plugin only works on continuous data not on
>> segmented data.
>> Hope this helps,
>>
>> Arno
>>
>> On 2 Oct 2012, at 08:17, Thang Le wrote:
>>
>> Hi everyone,
>>
>> I am running into a problem with the Gratton's ocular correction method
>> in EEGLAB and I was wondering whether you could help me troubleshoot.
>>
>> I have been attempting to apply the Gratton's ocular correction method to
>> a 64-channel data set. The two EOG channels are 65 and 66. So far I have
>> downsampled the data to 256Hz, rereferenced and segmented. The values I
>> used for Gratton's were:
>>
>> Number of EOG channel for regression: [65 66]
>> Channels: [1 64]
>> Window for Blink-detection: 24
>> Voltage for Blink-detection: 200
>>
>> However, EEGLAB would give me an error message that says "To RESHAPE the
>> number of elements must not change". I wasn't sure what to use for blink
>> window but it does not look like 24 is the right value.
>>
>> Thank you so much for your help.
>>
>> Le
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>
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-- 
Scott Makeig, Research Scientist and Director, Swartz Center for
Computational Neuroscience, Institute for Neural Computation, University of
California San Diego, La Jolla CA 92093-0559, http://sccn.ucsd.edu/~scott
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