Abstract: An impression evaluation device can quantitatively evaluate impressions of text strings, by including a first calculating unit that calculates values of a plurality of items regarding feature values of an input text string, and a second calculation unit that calculates, on the basis of a value calculated by the first calculating unit regarding one item out of the plurality of items selected on the basis of correlation between each of the plurality of items and an index evaluating an impression of a letter, and a storage unit storing a value of the index for each letter and values of the plurality of items, a value for the index with regard to the text string.

Abstract: A conversion apparatus includes: a determination unit configured to, using a numeric value of an amount of a given type as input, determine a conversion method to be applied to the numeric value among multiple conversion methods based on the type of the amount and the size of the numeric value; a conversion unit configured to convert the numeric value into a relative value obtained based on a predetermined reference, using the conversion method determined by the determination unit; and an output unit configured to output a result of applying the value to a predetermined template, and thereby the conversion apparatus generates an expression that is easy to understand.

Abstract: An information processing apparatus includes: a first storage unit that stores, for each of a plurality of first events, data including quantitative information related to the first event and data including subjective information related to the first event so as to be associated with each other; and a calculation unit that calculates, for each of combinations of the first events, an index value indicating similarity between the respective first events on the basis of the respective data of the respective first events related to the combination.