Analysis of friendship relation among students using attendance records

Abstract

We show a method to predict friendship relation among students using attendance time records to lectures. The record system consists of ID-cards of students and card readers which are equipted at lecture rooms and records times when a student attends or leaves a room. The distribution of difference of times recorded among two students depends if they are friends. We show a method to have the probability that a pair of students are friends using their time records and the distribution. We may use the probability to analyize group structure of a class and also to observe characteristics of classes.