Velocity Threshold Estimator Element

Summary ¶

	Velocity Threshold Estimator
Info
Category:	Eye-tracking Analysis		AddIn:	Eye-tracking analysis
Creator:	OkazoLab		Scope:	Parent event
Owns Snippets:	None		Usage:	Snippets

Properties ¶

Name	Description	Constraints	Type	On runtime change
Estimator Parameters
Is Estimating	Defines whether the threshold estimation is going on. Assign false to pause the estimation.	Normal..	Boolean
Lambda	Defines the multiplication factor for the standard deviation of velocity distribution. The result of the multiplication is used as the velocity threshold.	Normal..	Double
Gaze Processing
Tracking Device	Defines what tracking device provides positional samples for the element. The tracking devices include eye-trackers, the mouse and touch-screens. The 'Auto' option chooses the tracking device selected in the parent event. If there are no tracking elements enabled in the experiment, the system mouse is always used.	Design Time..	String
Sampling Rate	Defines the sampling rate of the tracking device  hardware in Hz. Keep the zero value for auto-detection.	Normal..	Double
Analysis Window Size	Defines the size of a moving analysis window in samples. The value also defines the data range in all generated plots	Design Time..	Int32
Exclusive Thresholds	Defines whether the exclusive velocity and saccade duration thresholds are used for the fixation detection by this element. The default value is false, which means that the same threshold values are shared with all eye-tracking analysis elements.	Design Time..	Boolean
X Velocity Threshold	Defines the saccade velocity threshold for the X-axes	Normal..	Double
Y Velocity Threshold	Defines the saccade velocity threshold for the Y-axes	Normal..	Double
AOI
Element AOI	Selects a visual element, whose viewport defines an on-screen AOI for the eye-tracking analysis.	Normal..	Int32
Custom AOIs	Selects a visual element, whose viewport defines an on-screen AOI for the eye-tracking analysis.	Normal..	IColle..
General Plot Settings
Rendering Size	The rendering size also defines the image resolution, when the plot is saved into an image file or video.	Normal..	clSize
Plot Title	Defines the title shown on the plot. The empty title removes the title area on the plot	Normal..	String
Show Axis	Defines whether the axis are visible on the plot	Normal..	Boolean
Show Gridlines	Defines whether the major tick gridlines are shown on the plot.	Normal..	Boolean
Add Screen Clone	Defines whether a clone of the presentation screen is shown at the background of the plot.	Design Time..	enScre..
Rendering Quality	Defines the quality and speed the plot rendering	Normal..	Int32
Plot Theme	Defines a visual theme for the plot	Normal..	Int32
Velocity Plot Settings
Threshold Color		Normal..	stColor
Fixation Line Color		Normal..	stColor
Line Thickness		Normal..	Double
Saccade Line Color		Normal..	stColor
Results
Reset Plot Now	Runtime command that resets the plotted data.	Runtime Command..	Boolean
XAML Velocity Plot	Returns a live XAML control that can be used for direct binding to the Content property of the XAML ContentControl element, e.g. ContentControl with a generated staircase plot can be added to the status screen or to the XAML Layout element.	Normal..	UIElem..
Save Velocity Plot Now	Assign a filename to save the generated plot at runtime	Runtime Command..	String
Preview Velocity Plot	Open a window with the plot preview	Runtime Command..	Boolean
Control
Is Enabled	If set to false the element is completely omitted when the experiment is run	Design Time..	Boolean
Title	Title of the element	Design Time..	String

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Demo Video¶

Snapshots ¶

Snapshot 1

Snapshot 2

Practical Use ¶

Technique 1 ¶

1. Step 1
2. Step 2
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   === Technique 2 ===
3. Step 1
4. Step 2
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    // Check the trial outcome. Result and RT just other user variables
   
   // insert code snippet here..
   
   

              
   ...
   == Notes ==
   ...
5. Insert Notes here..
6. Insert Notes here..