The results show different consistency across studies between the three types of timing ability .
The highest consistency of results showing atypical time perception abilities is found in high-level time perception studies .
It remains unclear if autism is characterized by a fundamental time perception impairment .
Overall , there are a number of studies that show differences between autistic and non-autistic individuals , but some studies do not find such differences .
Group differences are more consistent across studies using complex tasks rather than simpler more fundamental timing tasks .
Problems with timing and time perception have been suggested as key characteristics of autism spectrum condition ( ASC ) .
Studies and personal accounts from clinicians , parents , caregivers , and self-reports from autistic people themselves often refer to problems with time .
Although a number of empirical studies have examined aspects relating to time in autistic individuals , there remains no clear consensus on whether or how timing mechanisms may be affected in autism .
Temporal generalization in 3- to 8-year-old children.
Children aged 3 , 5 , and 8 years were tested on temporal generalization with visual stimuli . Different groups received 4- and 8-s st and ards . Gradients at all ages superimposed when plotted on the same relative scale , indicating underlying scalar timing . The principal developmental changes were ( i ) increasing sharpness of the generalization gradient with increasing age and ( ii ) a change from symmetrical ( 3 and 5 years ) to adultlike asymmetrical generalization gradients in the oldest children . Theoretical modeling attributed these changes to increasing precision of the reference memory of the st and ard  with increasing age , as well as a decreased tendency to " misremember " the st and ard  as being shorter than it actually was , as the children developed
The results show different consistency across studies between the three types of timing ability .
The highest consistency of results showing atypical time perception abilities is found in high-level time perception studies .
It remains unclear if autism is characterized by a fundamental time perception impairment .
Overall , there are a number of studies that show differences between autistic and non-autistic individuals , but some studies do not find such differences .
Group differences are more consistent across studies using complex tasks rather than simpler more fundamental timing tasks .
Problems with timing and time perception have been suggested as key characteristics of autism spectrum condition ( ASC ) .
Studies and personal accounts from clinicians , parents , caregivers , and self-reports from autistic people themselves often refer to problems with time .
Although a number of empirical studies have examined aspects relating to time in autistic individuals , there remains no clear consensus on whether or how timing mechanisms may be affected in autism .