Klein Sexual Orientation Grid

Fritz Klein founded the American Institute of Bisexuality in 1998 which is continuing his work by sponsoring bisexual-inclusive sex research, educating the general public on sexuality, and promoting the bisexual community.

Unlike the Kinsey scale, the Klein grid investigates sexual orientation in the past, the present and in the idealized future with respect to seven factors each, for a total of twenty-one values.

[6][7] Introduced in Klein's book The Bisexual Option the KSOG uses a seven-point scale to assess seven different dimensions of sexuality at three different points in an individual's life: past (from early adolescence up to one year ago), present (within the last 12 months), and ideal (what would be chosen if it were voluntary).

[11] Klein, while recognizing that the grid explores many more dimensions of sexual orientation than previous scales, acknowledged that it omits the following "aspects" of sexual orientation:[12] Additionally, factors not addressed by Klein include: While Klein held the belief that including more dimensions of sexual orientation was better, Weinrich et al. (1993) found that all of the dimensions of the KSOG seemed to be measuring the same construct.

Therefore, despite the scale being helpful in promoting the concept of sexual orientation as being multidimensional and dynamic, the additional dimensions measured do not necessarily reveal any more of an accurate description of one's overall sexual orientation than the Kinsey scale.