odml-terminologies/v1.1/stimulus/square_wave.xml

<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="odmlTerms.xsl"  xmlns:odml="http://www.g-node.org/odml"?>
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<!--                   square wave stimulus                    -->
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<odML version="1.1">
  <repository>http://portal.g-node.org/odml/terminologies/v1.1/terminologies.xml</repository>
  <version>1.0</version>
  <date>2011-01-21</date>

  <section>
    <type>stimulus/square_wave</type>
    <name>Squarewave</name>
    <definition>A squarewave stimulus was presented. Squarewaves modulate with a certain frequency about the intensity
      offset.
    </definition>

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

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

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

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

    <property>
      <name>OutputChannel</name>
      <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>
      <type>string</type>
    </property>

    <property>
      <name>Frequency</name>
      <definition>The frequency of the square wave modulation.</definition>
      <type>float</type>
      <unit>Hz</unit>
    </property>

    <property>
      <name>DutyCycle</name>
      <definition>The part of the cycle spend in the up state. E.g. 0.5 if up and down state each take half of the
        time.
      </definition>
      <type>float</type>
    </property>

    <property>
      <name>Amplitude</name>
      <definition>The modulation amplitude (i.e. the difference between up and downstate.)</definition>
      <type>float</type>
    </property>

    <property>
      <name>IntensityOffset</name>
      <definition>The mean intensity of the stimulus.</definition>
      <type>float</type>
    </property>

    <property>
      <name>StartAmplitude</name>
      <definition>The amplitude with which the squarewave stimulus started. This may assume either intensity offset - or
        + amplitude/2.
      </definition>
      <type>float</type>
    </property>

    <property>
      <name>Position</name>
      <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>
      <type>2-tuple</type>
    </property>

    <property>
      <name>PositionReference</name>
      <value>[top-left, center, bottom-right]</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>
      <type>string</type>
    </property>

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

  </section>
</odML>