Abstract
The goal of these studies was to develop the shorter version of the loneliness scale for use among Japanese adults. In Study 1, we analyzed dataset included 309 university students and 326 older adults to confirm factor structure of the scale and select the items of short form. In Study 2, we examined the reliability and validity of the short form. In Study 3, we conducted an Internet-based survey with 618 younger, middle-aged, and older adult participants to evaluate the factor structure of the measure in a sample with a wider age range. The results of these studies provided support for the reliability and validity of this sort form.
