Differences

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--- sift:gait_measures:gait_deviation_index [2024/11/06 19:46] – wikisysop
+++ sift:gait_measures:gait_deviation_index [2024/11/19 15:55] (current) – wikisysop
@@ Line 126: / Line 126: @@
 === Step 3: Dialog Selections ===
-{{ Sift:gait_measures:gps_dlg_notactive.png?500}}
+{{ Sift:gait_measures:GDIDLG.png?500}}
-The main GDI Dialog in Sift can be accessed through the Gait Measures menu {{:sift_gait_measures.png?20}} on the main toolbar. Users should begin by selecting the sift ND file they are using. This file will be used as the reference signals when calculation the global variance scores (GVS).**NOTE:** The Sift ND File MUST be loaded into Sift before using it for the GPS.
+The main GDI Dialog in Sift can be accessed through the Gait Measures menu {{:sift_gait_measures.png?20}} on the main toolbar. Users should begin by selecting the sift ND file they are using. This file will be used as the reference signals when calculation the global variance scores (GVS).
-\\
+**NOTE:** The Sift ND File MUST be loaded into Sift before using it for the GDI.
-After selecting a ND ... The signal type dialog selection will be deactivated here, as the GDI will always use LINK_MODEL_BASED signals from the underlying workspaces.
+The signal type dialog selection will be deactivated here, as the GDI will always use LINK_MODEL_BASED signals from the underlying workspaces.
-The folder selection defaults to Original here, and will be used for this example. The left and right event cycles will be populated with the gait events defined in the underlying CMZ files.
+The folder selection defaults to Original here, and will be used for this example. The left and right event cycles will be populated with the gait events defined in the underlying CMZ files. If this is not populated, no events were found, and those must be generated before proceeding. The literature suggests 51 normalization points for GDI signals, however, the user may change this if they wish.
-If this is not populated, no events were found, and those must be generated before proceeding. The literature suggests 51 normalization points for GDI signals, however, the user may change this if they wish.
 Here we have checked "compute query after calculation" which means that the GDI values will be auto queried into the explore page after running.
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+We then select the signal selection button to prompt a second dialog to the GDI. It is crucial that the user make careful selections in this dialog to ensure the correct signals are being compared. Here, users will select the signal from a list of all signals in the type and folder selected in the first dialog. Each combo box is populated with data from either the CMZ library that is loaded, or the ND file.
-We then select the signal selection button to prompt a second dialog to the GDI (center). It is crucial that the user make careful selections in this dialog to ensure the correct signals are being compared. Here, users will select the signal from a list of all signals in the type and folder selected in the first dialog. Each combo box is populated with data from either the CMZ library that is loaded, or the ND file.
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-**Pelvic Signals** - The first three combo boxes under "Signals" are for the selection of the Pelvic angles. Here, we provide users with a list of all signals from the underlying CMZ workspaces and corresponding folders selected in the first dialog. Here we have chosen the "L_Pelvic_Angle" (left and right for this database example are actually the exact same signal), with components X, Y, and Z for the pelvic tilt, obliquity, and rotation angles. Sift will normalize this pelvic signal to left events for the left side GPS, and right events for the right side GPS. We then selected the left and right pelvis X, Y, and Z angles from the list of signals that Sift identified in the VND or Sift ND normal database. Here, the normal database has computed a L_Pelvic_Angle and R_Pelvic_Angle. Note that the Normal Database signals are assumed to be already normalized to gait events, and then averaged. So in this case, L_Pelvic_Angle was normalized to left side events, and R_Pelvic_Angle was normalized to right side events prior to loading in this Normal database file.
+**Pelvic Signals** - The first three combo boxes under "Signals" are for the selection of the Pelvic angles. Here, we provide users with a list of all signals from the underlying CMZ workspaces and corresponding folders selected in the first dialog. Here we have chosen the "L_Pelvic_Angle" (left and right for this database example are actually the exact same signal), with components X, Y, and Z for the pelvic tilt, obliquity, and rotation angles. Sift will normalize this pelvic signal to left events for the left side GDI, and right events for the right side GDI. We then selected the left and right pelvis X, Y, and Z angles from the list of signals that Sift identified in the VND or Sift ND normal database. Here, the normal database has computed a L_Pelvic_Angle and R_Pelvic_Angle. Note that the Normal Database signals are assumed to be already normalized to gait events, and then averaged. So in this case, L_Pelvic_Angle was normalized to left side events, and R_Pelvic_Angle was normalized to right side events prior to loading in this Normal database file.
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-Once we return to the main dialog (right), the compute button is now active, and we can calculate the GDI and individual GVS measures for the active CMZ files against the normal database.
+Once we return to the main dialog, the compute button is now active, and we can calculate the GDI and individual GVS measures for the active CMZ files against the normal database.
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-{{Sift:gait_measures:gps_Dlg_active.png}}
+{{Sift:gait_measures:GDIDLGActive.png}}
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 === Step 4: Calculate and View Results ===
-GPS calculations are saved as metrics in the CMZ workspaces loaded in Sift. When queried into the explore page, users may plot them as Metric or Metric-Metric plots. Here, we can see the total GPS scores generated for selected workspaces plotted as a metric bar chart. We can also look at right and left specific GDI scores from the conditions of group GDI_1.
+GDI calculations are saved as metrics in the CMZ workspaces loaded in Sift. When queried into the explore page, users may plot them as Metric or Metric-Metric plots. Here, we can see the total GDI scores generated for selected workspaces plotted as a metric bar chart. We can also look at right and left specific GDI scores from the conditions of group GDI_1.
 {{sift:gait_measures:GDIResults.png?1000}} {{sift:gait_measures:LeftvsRightGDI.png?1000}}