Abstract: Method, apparatus and product for providing cognitive state-based seamless stimuli. The method comprising: obtaining a cognitive state of a human subject; determining a target cognitive state for the human subject; determining, based on the cognitive state and the target cognitive state, a saliency level for a stimuli, wherein the saliency level is configured to cause the human subject to direct spatial attention to the stimuli, wherein the saliency level is configured to cause the stimuli to be seamless for the human subject given the cognitive state; and outputting the stimuli at the saliency level to be perceived by the human subject.