Methods and a system are provided. A method includes receiving a plurality of words comprised in a Rapid Serial Visual Presentation. The method further includes determining a cognitive load of the plurality of words by using at least one metric. The cognitive load is determined on any of a word level and a word sequence level. The method also includes calculating a variable presentation rate for the plurality of words based on the cognitive load. The variable presentation rate is capable of being varied on any of the word level and the word sequence level. The method additionally includes controlling a displaying of the plurality of words on a display device in accordance with the calculated variable presentation rate.