Autistic individuals may have symptoms that are independent of the diagnosis, but that can affect the individual or the family.[24] An estimated 0.5% to 10% of individuals with ASD show unusual abilities, ranging from splinter skills such as the memorization of trivia to the extraordinarily rare talents of prodigious autistic savants.[41] Many individuals with ASD show superior skills in perception and attention, relative to the general population.[42] Sensory abnormalities are found in over 90% of those with autism, and are considered core features by some,[43] although there is no good evidence that sensory symptoms differentiate autism from other developmental disorders.[44] Differences are greater for under-responsivity (for example, walking into things) than for over-responsivity (for example, distress from loud noises) or for sensation seeking (for example, rhythmic movements).[45] An estimated 60%–80% of autistic people have motor signs that include poor muscle tone, poor motor planning, and toe walking;[43] deficits in motor coordination are pervasive across ASD and are greater in autism proper.[46]