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