Perception of the Duration of time: a Developmental Semiology from 2:6 to 12 years, general population versus atypical, and elaboration of a parental questionnaire assessment

Introduction
The perception of time is usually considered from sequential time but there are not any semiological markers of the capacity to apprehend the duration of time.
Hypothesis
The “capacity to feel the passage of time” is determinable by “semiological markers” in everyday life.
Method
Elaboration of a parental questionnaire (Likert scale); 2 samples from 2:6 to 12 years: 827 in general population and 297 in transnosographic population with psychological therapy; logistic regression; percentiles curves.
Results
General population: perception of the passage of time is gradually acquired; full competence at 9 years. The apprehension of sequential time is quasi maximum at 4 years.
Atypical population: perception of the passage of time delayed of 18 months; important difficulties remain at 13 years. The apprehension of sequential time is delayed; at 13 years it remains bad at percentile 95.
No differences according to the sex.
Presentation of a short questionnaire for assessment.