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 .
Episodic but not semantic order memory difficulties in autism spectrum disorder: Evidence from the Historical Figures Task
Considerable evidence suggests that the episodic memory system operates abnormally in autism spectrum disorder ( ASD ) whereas the functions of the semantic memory system are relatively preserved . Here we show that the same dissociation also applies to the domain of order memory . We asked adult participants to order the names of famous historical figures either according to their chronological order in history ( probing semantic memory ) or according to a r and om sequence shown once on a screen ( probing episodic memory ) . As predicted , adults with ASD  performed less well than age- and IQ-matched comparison individuals only on the  episodic task .  This observation is of considerable importance in the context of developmental theory because semantic and episodic order memory abilities can be dissociated in typically developing infants before they reach the age at which the behavioural markers associated with ASD are first apparent . This raises the possibility that early emerging memory abnormalities play a role in shaping the developmental trajectory of the disorder . We discuss the broader implication s of this possibility and highlight the urgent need for greater scrutiny of memory competences in ASD early in development
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 .