stimulus/dc DC Property definitions to describe a DC stimulus meaning a constant stimulus e.g. a constant illumination, current etc. Modality The stimulus modality like acoustic, haptic, light etc. string Duration The duration of the stimulus in seconds. floats Intensity The stimulus intensity in absolute or relative terms. string IntensityOffset The stimulus intensity given as the offset relative to another stimulus. string TemporalOffset The temporal offset (with respect to the begin of the recorded trial) with which this stimulus was presented. floats Function The function of the described stimulus. E.g. if the white noise constitutes the carrier. string OutputChannel 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. string Position 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. 2-tuple PositionReference top-left , center , bottom-right 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. string SpatialExtent The spatial extend of the presented stimulus (width;height) e.g. (1024;768). 2-tuple