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Page History: Fixation Detector Element

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Page Revision: 2016/05/05 19:49


Element Icon New Element
Info
Category: AddIn: Base Elements
Creator: OkazoLab Team Scope: Parent Event
Owns Snippets: no Usage: Presentation Screen,Status Screen, Code snippets

Actions aligned with epochs of the parent event

EpochActions
After experiment onsetThe element ...
Event rendered
Before event onset
After event onset
Control loop stepThe element ...
Before event offset
Before experiment offsetThe element ...

Properties

Generic Properties

NameProperty descriptionConstraintsTypeUpon change
Triggering
Triggering ModeDefines the triggering mode for fixation detectorenum
Fixation DurationDefines the minimal fixation duration (in ms.) for triggering, when the triggering mode is set to 'Minimal fixation duration'Double
Triggering TimeReturns a local event time (in ms) of the last button triggering. The value can be used an accurate measure of the response timeclTime
Is TriggeredIndicates whether a button has been triggered at least once, since the onset of the parent event. This property can be naturally used to gate switching between events.Boolean
General Plot Settings
Show Axis Boolean
Rendering SizeDefines the size of the generated XAML staircase plot in pixels. The plot is automatically stretched on rendering, but a larger rendering size improves the chart quality with some cost in performance. The rendering size is also used as the resulting image resolution, when the chart is saved into a file.clSize
Show Gridlines Boolean
Add Screen Clone enum
High-Quality Rendering Boolean
Plot Theme Int32
Fixaccade Plot Settings
Fixaccade Plot Title String
Saccade Points Color stColor
Fixation Points Color stColor
Line Thickness Double
Velocity Plot Settings
Velocity Plot Title String
Threshold Color stColor
Velocity Line Color stColor
Line Thickness Double
Saccade Label Color stColor
Results
Reset Plot NowRuntime command that resets the plotted data. Assign 'true' in the snippets to execute the command.Boolean
XAML Fixaccade PlotReturns 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.UIElement
Save Fixaccade Plot NowAssign a fully specified filename to save the generated plotString
Preview Fixaccade PlotOpen a window with the fixaccade plot previewclDesignAction
XAML Velocity PlotReturns 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.UIElement
Save Velocity Plot NowAssign a filename to save the generated plot at runtimeString
Preview Velocity PlotOpen a window with the plot previewclDesignAction
Detection Results
All Fixations clFixationInfo
Fixation Number Int32
Last Fixation clFixationInfo
Current X VelocityReturns the current gaze velocity along the X-axes. The value is read-only. Double
Current Y VelocityReturns the current gaze velocity along the Y-axes. The value is read-only. Double
Gaze Processing
Radar ProviderDefines which of the radar providers is used for positional input in this event. In each experiment, the radar providers includes the system mouse and all tracker elements. The selected radar provider controls the Radar Point property and input to the AOI elements in this event. When 'Auto' is chosen, the first tracker element is picked up. If there are no tracker elements, the system mouse is used by default.String
AOI Int32
Sampling RateDefines the sampling rate of the tracker hardware in Hz. You can keep the zero value for auto-detection.Double
Analysis Window SizeDefines the size of a moving analysis window in samples. The value also defines the data range in all generated plots.Int32
Exclusive ThresholdsDefines whether the exclusive velocity and saccade thresholds are used by this element. The default value is false, which means that the same threshold values are shared with all eye-tracking analysis elements.Boolean
X Velocity ThresholdDefines the saccade velocity threshold for the X-axes.Double
Y Velocity ThresholdDefines the saccade velocity threshold for the Y-axes.Double
Minimal Saccade DurationDefines the minimal duration threshold (in ms.) for the velocity-based saccade detection. If a candidate saccade shorter than the threshold, it's discarded after completion. Note that, the element can still be triggered at the start and peak velocity of the discarded saccades, when the triggering mode is not 'On the saccade end'. If you do not want to apply the minimal duration threshold, set the zero value.Double
Maximal Saccade DurationDefines the maximal duration threshold (in ms.) for the velocity-based saccade detection. If a candidate saccade shorter than the threshold, it's discarded after completion. Note that, the element can still be triggered at the start and peak velocity of the discarded saccades, when the triggering mode is not 'On the saccade end'. If you do not want to apply the maximal duration threshold, set the zero value.Double
Control
Is EnabledIf set to false the element is completely omitted when the experiment is run.Boolean
TitleTitle of the elementString

+=== Properties inherited from clElement === Inherited properties of clElement
NameDescriptionConstraintsValue TypeUpon Change
Control
Is EnabledIf set to false the element is completely omitted when the experiment is run.Boolean
TitleTitle of the element.String



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Practical Use

Technique 1

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 // Check the trial outcome. Result and RT just other user variables
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