stimulus Stimulus General description of an applied stimulus. This section is basis of various related sections that specify more specific stimuli. Description A textual description of the stimulus. text Comment A comment on this specific stimulus. text Author Who is the author of this stimulus. person Duration The duration of the stimulus. float s StartTime The time the stimulus started. time EndTime The time the stimulus ended. time Intensity like the current in case of electrical stimulation. string Location Describes the site of the stimulus application. string Modality Visual, acoustic, haptic, electrical, etc. stimulation. string Repetitions The number of repetitions of the described stimulation. int InterstimulusInterval The time between two subsequent stimulations. float s StimulusFile The stimulus file used. Using it will blow up the the size of the metadatafile and we recommend to rather define the URL of underlying stimulus file. binary StimulusFileURL The URL of a an applied stimulus file. This is the recommended alternative to explicitely including the actual stimulus via StimulusFile. URL 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