Abstract: A computer-implemented method of delivering a quiz that includes adjusting the difficulty of the quiz in response to a player's performance. Ranking data that enables the relative difficulty of the respective instances of each question to be determined is maintained and a target performance level for the player is determined. The player's current performance level is compared to the target performance level and the next question is selected depending on the result of the comparison. A more difficult question than the previous question is selected as the next question if the comparison indicates that the user's current performance level exceeds the target performance level, otherwise a less difficult question is selected.

Abstract: A computer-implemented method of managing a computer-implemented quiz in which questions are delivered to at least one player using a computer system. Questions are assigned to question categories in category hierarchies. Players can navigate through the category hierarchies to select a question category of interest. The path taken by the players through the hierarchy and the number of times the players select the question categories are recorded and analysed to detect patterns in the players behaviour. The patterns are used to predict the next question category to be selected by the players and so to determine demand for questions.