Temporal cognition in children with autistic spectrum disorders: tests of diachronic thinking.

Boucher et al. (2007) asked autistic and non-autistic kids to think about events that stretch over time.

They used picture stories and verbal tasks to see who could grasp that things change and grow.

Two separate groups of children tried the same tests to check if the results stayed the same.

Autistic children scored much lower on every diachronic-thinking task.

They had trouble seeing how a seed becomes a tree or how a story unfolds step by step.

The gap stayed large in both samples, showing the problem is reliable.

Ganz et al. (2009) and Finke et al. (2017) found similar timing problems in the ear, not the eye. Their autistic listeners needed longer silent gaps to notice sound breaks.

Dudley et al. (2019) pooled 45 studies and saw the same pattern: simple timing often looks fine, but complex time tasks reveal clear deficits.

Together these papers build one story: autistic brains handle clock-time okay yet struggle when events must be stitched into a sequence.

If a learner cannot picture yesterday, today, and tomorrow, schedules, social stories, and self-monitoring will stall.

Probe diachronic thinking before you teach sequencing, planning, or narrative goals. Use visual timelines, act-out sequences, and check understanding of change over time.