odml-terminologies/v1.0/stimulus/square_wave.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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<!--                   square wave 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/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>
	      <value>
			<type>string</type>
	      </value>
	      <definition>The stimulus modality like acoustic, haptic, visual etc.</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>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 explicitely express that several stimuli (that share the same OutputChannel) are jointly	presented.</definition>
      </property>
     
      <property>
	      <name>Frequency</name>
	      <value>
			<type>float</type>
			<unit>Hz</unit>
	      </value>
	      <definition>The frequency of the square wave modulation.</definition>
      </property>
     
      <property>
	      <name>DutyCycle</name>
	      <value>
			<type>float</type>
	      </value>
	      <definition>The part of the cylce spend in the up state. E.g. 0.5 if up and down state each take half of the time.</definition>
      </property>
     
      <property>
	      <name>Amplitude</name>
	      <value>
			<type>float</type>
	      </value>
	      <definition>The modulation amplitude (i.e. the difference between up and downstate.)</definition>
      </property>
     
      <property>
	      <name>IntensityOffset</name>
	      <value>
			<type>float</type>
	      </value>
	      <definition>The mean intensity of the stimulus.</definition>
      </property>
     
      <property>
	      <name>StartAmplitude</name>
	      <value>
			<type>float</type>
	      </value>
	      <definition>The amlitude with which the squarewave stimulus started. This may assume either intensity offset - or + amplitude/2.</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>SpatialExtent</name>
	      <value>
			<type>2-tuple</type>
	      </value>
         <definition>The spatial extend of the presented stimulus (width;height) e.g. (1024;768).</definition>
      </property>
    </section>
</odML>