Variation in nutrition knowledge of adults with mild or moderate menta
l retardation (30 obese, 27 nonobese) from four community agencies was
examined as a function of their body mass and level of mental retarda
tion, They completed a nutrition knowledge test adapted for individual
s with mental retardation. Multiple regression analyses revealed signi
ficant effects of lever of mental retardation and body mass on nutriti
on knowledge. Adults with mild mental retardation possessed greater nu
trition knowledge than did those with moderate mental retardation, and
obese individuals possessed more knowledge than did nonobese individu
als. The unexpected relation between nutrition knowledge and degree of
obesity implies an influential role for environmental factors in the
development of obesity.