odml-terminologies/v1.0/stimulus/grating.xml

<?xml version="1.0" encoding="ISO-8859-1"?>
<?xml-stylesheet type="text/xsl" href="odmlTerms.xsl" xmlns:odml="http://www.g-node.org/odml"?>
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<!--                      Grating stimulus                     -->
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<odML version="1">
  <repository>http://portal.g-node.org/odml/terminologies/v1.0/terminologies.xml</repository>
  <version>1.0</version>
  <date>2011-01-21</date>

  <section>
    <type>stimulus/grating</type>
    <name>Grating</name>
    <definition>Properties to describe Grating stimuli.</definition>

    <property>
      <name>Modality</name>
      <value>
        <type>string</type>
      </value>
      <definition>The stimulus modality like acoustic, haptic, visual etc.</definition>
    </property>

    <property>
      <name>Type</name>
      <value>
        <type>string</type>
      </value>
      <definition>The type of grating used. Commonly either Sinewave or Squarewave gratings are used.</definition>
    </property>

    <property>
      <name>Duration</name>
      <value>
        <type>float</type>
        <unit>s</unit>
      </value>
      <definition>The duration of the stimulus in seconds.</definition>
    </property>

    <property>
      <name>TemporalOffset</name>
      <value>
        <type>float</type>
        <unit>s</unit>
      </value>
      <definition>The temporal offset (with respect to the begin of the recorded trial) with which this stimulus was
        presented.
      </definition>
    </property>

    <property>
      <name>Contrast</name>
      <value>
        <type>float</type>
      </value>
      <definition>The contrast of the grating stimulus.</definition>
    </property>

    <property>
      <name>Intensity</name>
      <value>
        <type>float</type>
      </value>
      <definition>The mean intensity of the grating stimulus.</definition>
    </property>

    <property>
      <name>GratingType</name>
      <value>
        <type>string</type>
      </value>
      <definition>The type of grating, i.e. 'sinewave' or 'squarewave'.</definition>
    </property>

    <property>
      <name>SpatialWavelength</name>
      <value>
        <type>float</type>
      </value>
      <definition>The spatial wavelength of the grating.</definition>
    </property>

    <property>
      <name>SpatialFrequency</name>
      <value>
        <type>float</type>
      </value>
      <definition>the spatial frequency of the grating.</definition>
    </property>

    <property>
      <name>SpatialExtent</name>
      <value>
        <type>2-tuple</type>
      </value>
      <definition>The spatial extend of the presented stimulus (width;height) e.g. (1024;768).</definition>
    </property>

    <property>
      <name>Orientation</name>
      <value>
        <type>float</type>
      </value>
      <definition>The orientation of the grating in degrees.</definition>
    </property>

    <property>
      <name>DriftingVelocity</name>
      <value>
        <type>float</type>
      </value>
      <definition>In case of a constantly drifting grating, the velocity</definition>
    </property>

    <property>
      <name>Position</name>
      <value>
        <type>2-tuple</type>
      </value>
      <definition>The position of the stimulus on e.g the screen. Specified as a 2-tuple (x;y). By default this position
        refers to the top-left corner of the object or its bounding box.
      </definition>
    </property>

    <property>
      <name>PositionReference</name>
      <value>top-left
        <type>string</type>
      </value>
      <value>center
        <type>string</type>
      </value>
      <value>bottom-right
        <type>string</type>
      </value>
      <definition>By default stimulus positions are specified by the coordinates of the top-left corner (or of the
        bounding box). Use this property for other definitions.
      </definition>
    </property>

    <property>
      <name>Function</name>
      <value>
        <type>string</type>
      </value>
      <definition>The function of the described stimulus. E.g. if the white noise constituted the carrier.</definition>
    </property>

    <property>
      <name>OutputChannel</name>
      <value>
        <type>string</type>
      </value>
      <definition>The physical output device (e.g. an analog output channel, a monitor screen, the same loudspeaker,
        etc.). This information can be used to explicitly express that several stimuli (that share the same
        OutputChannel) are jointly presented.
      </definition>
    </property>

  </section>
</odML>