fixations


Fixations detected in a stream of raw eye positions.  The
corresponding raw eye positions samples are found in the data frame
<code><a rd-options="" href="/link/samples?package=saccades&version=0.1-1" data-mini-rdoc="saccades::samples">samples</a></code> also part of this package.


Functions for detecting eye fixations in raw eye-tracking
data.  The detection is done using a velocity-based algorithm for
saccade detection proposed by Ralf Engbert and Reinhold Kliegl in
2003.  The algorithm labels segments as saccades when the velocity of
the eye movement exceeds a certain threshold.  Anything between two
saccades is considered a fixation.  Thus the algorithm is not
appropriate for data containing episodes of smooth pursuit eye
movements.

Titus von der Malsburg

saccades

Detection of Fixations in Eye-Tracking Data

fixations function

a data frame containing one line per fixation.  The
fixations are sorted in chronological order.  Time is given in
milliseconds, x- and y-coordinates in screen pixels.

Format

Recorded with an iViewX Eye-Tracker by SMI at approximately
250 Hz.

fixations: Fixations Detected in a Stream of Raw Positions

Description

Usage

Arguments

Format

Source