A method of tracking visual attention, the method comprising: obtaining a base image ; generating at least one visual stimulus, each stimulus having a characteristic modulation, the characteristic modulation being applied to high spatial frequency, HSF, components of the visual stimulus, the HSF components having a spatial frequency higher than a predetermined high spatial frequency threshold; displaying the or each visual stimulus via a graphical user interface, GUI, of a display, wherein displaying the or each visual stimulus comprises: merging the or each visual stimulus with the base image to provide a blended image; and displaying the blended image via the GUI; receiving neural signals of a user from a neural signal capture device ; and when the user views the or each visual stimulus, determining a point of focus of the user in the blended image based on the neural signals, the neural signals including information associated with the characteristic modulation of a visual stimulus to which the user's visual attention is directed; wherein generating the stimulus includes: processing the base image into segmented display objects ; for each segmented display object, filtering the segmented display objects into high spatial frequency, HSF, components and low spatial frequency, LSF, components ; and applying a temporal modulation in the HSF components of the segmented display objects . obtaining a base image ; generating at least one visual stimulus, each stimulus having a characteristic modulation, the characteristic modulation being applied to high spatial frequency, HSF, components of the visual stimulus, the HSF components having a spatial frequency higher than a predetermined high spatial frequency threshold; displaying the or each visual stimulus via a graphical user interface, GUI, of a display, wherein displaying the or each visual stimulus comprises: merging the or each visual stimulus with the base image to provide a blended image; and displaying the blended image via the GUI; merging the or each visual stimulus with the base image to provide a blended image; and displaying the blended image via the GUI; receiving neural signals of a user from a neural signal capture device ; and when the user views the or each visual stimulus, determining a point of focus of the user in the blended image based on the neural signals, the neural signals including information associated with the characteristic modulation of a visual stimulus to which the user's visual attention is directed; wherein generating the stimulus includes: processing the base image into segmented display objects ; for each segmented display object, filtering the segmented display objects into high spatial frequency, HSF, components and low spatial frequency, LSF, components ; and applying a temporal modulation in the HSF components of the segmented display objects . processing the base image into segmented display objects ; for each segmented display object, filtering the segmented display objects into high spatial frequency, HSF, components and low spatial frequency, LSF, components ; and applying a temporal modulation in the HSF components of the segmented display objects . <EOS>