Klein first described the KSOG in his 1978 book The Bisexual Option .
The Klein Sexual Orientation Grid ( KSOG ) developed by Fritz Klein attempts to measure sexual orientation by expanding upon the earlier Kinsey scale .
Fritz Klein first described the KSOG in Fritz Klein 's 1978 book The Bisexual Option .
The Klein Sexual Orientation Grid ( KSOG ) developed by Fritz Klein attempts to measure sexual orientation by expanding upon the earlier Kinsey scale .