Saccade Detector Element

Modified on 2018/08/03 05:30 by Administrator — Categorized as: Eye-tracking analysis

Summary

Element Icon Saccade Detector
Info
Category: Eye-tracking Analysis AddIn: Eye-tracking analysis
Creator: OkazoLab Scope: Parent event
Owns Snippets: None Usage: Snippets

Properties

NameDescription                              ConstraintsTypeOn
runtime
change
Triggering
Triggering Mode        Defines the triggering mode for saccade detection                enSacc..         
Triggering Time        Returns a local event time (in ms) of the last button triggering. The value can be used an accurate measure of the response time                clTime         
Is Triggered        Indicates 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 Size        The rendering size also defines the image resolution, when the plot is saved into an image file or video.                clSize         
Show Gridlines        Defines whether the major tick gridlines are shown on the plot.                Boolean         
Add Screen Clone        Defines whether a clone of the presentation screen is shown at the background of the plot.                enScre..         
Rendering Quality        Defines the quality and speed the plot rendering                Int32         
Plot Theme        Defines a visual theme for the plot                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         
Fixation Line Color                        stColor         
Line Thickness                        Double         
Saccade Line Color                        stColor         
Results
Reset Plots Now        Runtime command that resets the plotted data. Assign 'true' in the snippets to execute the command.                Boolean         
XAML Fixaccade 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.                UIElem..         
Save Fixaccade Plot Now        Assign a fully specified filename to save the generated plot                String         
Preview Fixaccade Plot        Open a window with the fixaccade plot preview                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.                UIElem..         
Save Velocity Plot Now        Assign a filename to save the generated plot at runtime                String         
Preview Velocity Plot        Open a window with the plot preview                Boolean         
Detection Results
All Saccades                        clSacc..         
Saccade Number                        Int32         
Last Saccade                        clSacc..         
Current X Velocity        Returns the current gaze velocity along the X-axes. The value is read-only.                Double         
Current Y Velocity                        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.                String         
Sampling Rate        Defines the sampling rate of the tracking device  hardware in Hz. Keep the zero value for auto-detection.                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                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.                Boolean         
X Velocity Threshold        Defines the saccade velocity threshold for the X-axes                Double         
Y Velocity Threshold        Defines the saccade velocity threshold for the Y-axes                Double         
Minimal Saccade Duration        Defines the minimal saccade duration threshold (in ms.) for the velocity-based detection algorithm. If a saccade candidate 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 Duration        Defines the maximal duration threshold (in ms.) for the velocity-based detection algorithm. 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         
AOI
Element AOI        Selects a visual element, whose viewport defines an on-screen AOI for the eye-tracking analysis.                Int32         
Custom AOIs        Selects a visual element, whose viewport defines an on-screen AOI for the eye-tracking analysis.                IColle..         
Control
Is Enabled        If set to false the element is completely omitted when the experiment is run                Boolean         
Title        Title of the element                String         

Saccade Detector Element analyzes a position stream from an arbitrary tracking device (e.g. an eye-tracker) and detects saccade states in a real-time.

Description

...

Snapshots

Snapshot 1

Snapshot 1

Snapshot 2

Snapshot 2

Practical Use

...

Technique 1

  1. Step 1
  2. Step 2
    ...
    === Technique 2 ===
  3. Step 1
  4. Step 2
    ...

     // Check the trial outcome. Result and RT just other user variables
    
    // insert code snippet here..
               
    ...
    == Notes ==
    ...
  5. Insert Notes here..
  6. Insert Notes here..