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17: Segmentation Figure 17-8 shows an incorrect way to define this specification. Criteria Set 1 **** **** **** 1 3 **** 5 **** Criteria 1 list 7 Temporal relation Event To Select: Figure 17-8. Incorrect segmentation specification The specification in Figure 17-8 is incorrect because it provides oversimplified instructions to Net Station. It uses one criteria set to define both position and condition, and assumes that the software will understand that you want event pairs only where the resp occurs immediately after the **** event. Instead, based on its segmentation logic (see Figure 17-6), Net Station interprets this as a request to find the first resp event that follows an **** event, even if other events separate them. Rather than the two correct event pairs, this specification produces four pairs (see Table 17-1). Table 17-1. Incorrect specification definition Criteria Set 1 Criteria Set 2 Temporal relation Answer Event pair **** 1 resp 4 Is resp 4 the first resp event after *** 1? yes 1 and 4 **** 3 resp 8 Is resp 8 the first resp event after *** 1? no **** 5 Is resp 4 the first resp event after *** 3? yes 3 and 4 **** 7 Is resp 8 the first resp event after *** 3? no Is resp 4 the first resp event after *** 5? no Is resp 8 the first resp event after *** 5? yes 5 and 8 Is resp 4 the first resp event after *** 7? no Is resp 8 the first resp event after *** 7? yes 7 and 8 To approach this correctly, you must use two criteria sets to describe the second event, which comprises a specific position and a specific condition. 136 Net Station Waveform Tools Technical Manual S-MAN-200-WFTR-001 • December 21, 2006 resp resp resp Criteria 2 list Criteria Set 2 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 4 8
In Figure 17-9, Criteria Set 2 tells Net Station to stop at the next event following Criteria Set 1, regardless of its code—this establishes the position of the event. Then, Criteria Set 3 tells Net Station to keep only those events that have a resp code, thus establishing the condition of the event. Criteria Set 1 Figure 17-9. Correct segmentation specifications As shown in Table 17-2, this specification yields the two correct event pairs. Criteria Set 1 Criteria Set 2 (determines position) Table 17-2. Correct specification Criteria Set 3 (determines condition) Net Station Waveform Tools Technical Manual S-MAN-200-WFTR-001 • December 21, 2006 **** **** **** **** 1 3 5 **** 7 Criteria 1 list **** ABCD **** resp **** ABCD Answer Event pair **** 1 ABCD 2 Is ABCD 2 a resp? no **** 3 resp 4 Is resp 4 a resp? yes 3 and 4 **** 5 ABCD 6 Is ABCD 6 a resp? no **** 7 resp 8 Is resp 8 a resp? yes 7 and 8 17: Segmentation Depending on your segmentation needs, this can become complex, with some categories including as many as 12 criteria sets! The detailed, real-world examples on page 156 should help illustrate these descriptions. 2 4 6 **** 7 resp Criteria 2 list 8 Temporal relation 1 3 5 stim resp Criteria Set 2 Criteria Set 3 resp 4 resp 8 Criteria 3 list Temporal relation 137
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Electrical Geodesics, Inc. Net Stat
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Electrical Geodesics makes no warra
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vi Contents chapter 3 chapter 4 cha
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viii Contents chapter 18 chapter 19
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List of Figures chapter 5 Averaging
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List of Figures 17-16 Temporal rela
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List of Figures xiv Net Station Wav
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List of Tables chapter 17 Segmentat
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Preface • The Net Station Viewer
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Preface Troubleshooting, Support, a
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1: The Waveform Tools Window Table
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1: The Waveform Tools Window Creati
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1: The Waveform Tools Window • To
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1: The Waveform Tools Window Tips o
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1: The Waveform Tools Window In an
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1: The Waveform Tools Window File M
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1: The Waveform Tools Window Docs M
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1: The Waveform Tools Window 36 Net
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2: Jobs and Results Window Jobs and
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2: Jobs and Results Window Results
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2: Jobs and Results Window 42 Net S
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3: Common Controls 2. Output Option
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3: Common Controls Table 3-2. Outpu
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3: Common Controls • Category lis
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4: Artifact Detection Threshold Art
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4: Artifact Detection The tool can
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4: Artifact Detection Eye Movements
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4: Artifact Detection 2. “Perform
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4: Artifact Detection 3. “Output
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4: Artifact Detection Eye-Blink Thr
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4: Artifact Detection Data Pane: Se
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4: Artifact Detection 64 Net Statio
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5: Averaging Averaging Specificatio
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5: Averaging 5. Exclude Subjects an
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6: Bad Channel Replacement For more
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6: Bad Channel Replacement 72 Net S
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7: Baseline Correction The followin
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7: Baseline Correction 76 Net Stati
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8: Combine Files Combine Files Spec
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8: Combine Files Stacking Files Sta
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8: Combine Files Merge Just the Sel
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8: Combine Files 2. Carry Selected
Page 86 and 87: 9: Difference Wave You can choose f
Page 88 and 89: 9: Difference Wave 88 Net Station W
Page 90 and 91: 10: Event Export The spreadsheet co
Page 92 and 93: 10: Event Export 92 Net Station Wav
Page 94 and 95: 11: File Export The File Export spe
Page 96 and 97: 11: File Export 96 Net Station Wave
Page 98 and 99: 12: Filtering • Stopband gain: co
Page 100 and 101: 12: Filtering Filtering Specificati
Page 102 and 103: 12: Filtering Filter Settings Pane
Page 104 and 105: 13: Markup from File Event File For
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Page 108 and 109: 13: Markup from File Net Station EE
Page 110 and 111: Net Station EEG file with mark-up e
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Page 114 and 115: 13: Markup from File 2. Track Name.
Page 116 and 117: 14: Montage Operations There are se
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Page 120 and 121: 15: Ocular Artifact Removal The OAR
Page 122 and 123: 15: Ocular Artifact Removal Table 1
Page 124 and 125: 15: Ocular Artifact Removal 124 Net
Page 126 and 127: 16: Script be detected only at run
Page 128 and 129: 16: Script 128 Net Station Waveform
Page 130 and 131: 17: Segmentation Segmentation Overv
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Page 138 and 139: 17: Segmentation Double-Checking Yo
Page 140 and 141: 17: Segmentation 2. Criteria pane.
Page 142 and 143: 17: Segmentation Table 17-4. Criter
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Page 148 and 149: 17: Segmentation Temporal Relations
Page 150 and 151: 17: Segmentation Table 17-8. Criter
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Page 158 and 159: 17: Segmentation We base the segmen
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Page 162 and 163: 17: Segmentation Criteria Set 1 Cri
Page 164 and 165: 17: Segmentation 164 Net Station Wa
Page 166 and 167: 18: Short Epoch Filtering FIR versu
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Page 170 and 171: 19: Statistic Extraction You specif
Page 172 and 173: 19: Statistic Extraction 2. Add/Clo
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Page 184 and 185: 20: T-test T-test Waveform Tool The
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20: T-test The two-cell t-test woul
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20: T-test The results are output t
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20: T-test 190 Net Station Waveform
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21: Wavelet In wavelet transformati
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21: Wavelet The top images show a w
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21: Wavelet Net Station’s Values
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21: Wavelet 3. “Frequency scale f
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21: Wavelet before or after the eve
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A: Software Technical Support 202 N
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B: Updating EGI Licenses Tips on Up
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B: Updating EGI Licenses Generating
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B: Updating EGI Licenses Questions
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Index E Edit menu 33 editing specif
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Index Statistic Extraction specific
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