“…Over the years, a number of researchers have suggested that autism may be better understood by examining the component behavioral and cognitive abnormalities of autism [Adrien et al, 2001;Beglinger and Smith, 2001;Bolte and Poustka, 2001;Coon, 2006;Dawson et al, 2002;Goodman, 1989;Gupta and State, 2007;Hollander et al, 1998;Klin et al, 2000;Kolevzon et al, 2004;Lund and Jensen, 1989;McBride et al, 1996;Myhr, 1998;Piven, 2001;Silverman et al, 2002;Skuse et al, 2004;South et al, 2005;Sung et al, 2005;Szatmari et al, 2002;Tanguay, 1999;Viding and Blakemore, 2007;Williams, 2006;Wing, 2005;Wing and Wing, 1971]. As early as 1971, Wing and Wing [1971] stated that the ''multiple impairments (of autism) can vary in severity andy can occur independently in various childhood conditions.''…”