A perusing determination device including a computer processor, the device comprising: an eye tracking unit configured to detect a movement direction of a line-of-sight of a user reading a document; a reading time acquisition unit configured to measure time for the user to read each line of the document based on a detection result of the eye tracking unit; and a determination unit configured to make a determination of whether the user has perused the document based on variation of time for reading each line, characterized by: the determination unit is configured to calculate a relative frequency of the number of occurrences of specific words per line, where the relative frequency of the number of occurrences of the specific words in a line is a ratio of the number of occurrences of the specific words in that line to the number of occurrences in the document; the determination unit is configured to determine whether or not a value K is a predetermined threshold value or less, the value K being calculated based on the measured times and the relative frequencies of the number of occurrences of the specific words per line to indicate whether the variation of time for reading each line and a variation of the number of occurrences of the specific words for each line are similar, and such that the smaller the value of K the more similar the distribution of the time for reading each line and the distribution of the number of occurrences of the specific words for each line; and the determination unit is configured, when the value K is the threshold value or less, to determine that the user has perused the document, and when the value K is greater than the threshold value, to determine that the user has not perused the document. an eye tracking unit configured to detect a movement direction of a line-of-sight of a user reading a document; a reading time acquisition unit configured to measure time for the user to read each line of the document based on a detection result of the eye tracking unit; and a determination unit configured to make a determination of whether the user has perused the document based on variation of time for reading each line, the determination unit is configured to calculate a relative frequency of the number of occurrences of specific words per line, where the relative frequency of the number of occurrences of the specific words in a line is a ratio of the number of occurrences of the specific words in that line to the number of occurrences in the document; the determination unit is configured to determine whether or not a value K is a predetermined threshold value or less, the value K being calculated based on the measured times and the relative frequencies of the number of occurrences of the specific words per line to indicate whether the variation of time for reading each line and a variation of the number of occurrences of the specific words for each line are similar, and such that the smaller the value of K the more similar the distribution of the time for reading each line and the distribution of the number of occurrences of the specific words for each line; and the determination unit is configured, when the value K is the threshold value or less, to determine that the user has perused the document, and when the value K is greater than the threshold value, to determine that the user has not perused the document.