stimulus/ramp Ramp A ramp stimulus may either linearly increase or decrease in amplitude. Starting from a certain start amplitude and reaching with a certain slope the destination amplitude. Modality The stimulus modality like acoustic, haptic, light etc. string Duration The duration of the stimulus in seconds. floats 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 constituted 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 StartAmplitude The start amplitude of the ramp. float EndAmplitude The ending amplitude. float Slope The slope with which the ramp ascends respectively descends. float RampStartTime The time the ramp started with respect to the beginning of this ramp stimulus. floats 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