Time blindness: what the research shows and where it stops

“Time blindness” is an everyday name for losing track of how much time has passed or how long something will take. It is not a diagnosis. Laboratory studies do find that people with ADHD judge time less accurately ¹, but most of that work is in children, and the picture for adults is mixed ².

What the evidence says

A meta-analysis of 55 studies found that people with ADHD were less accurate at estimating and producing time intervals ¹. A separate meta-analysis in children and adolescents found that time was perceived less accurately and less consistently ³, and another, also in children, found the difficulty was clearer over longer intervals ⁴.

Adult studies are fewer. In one study comparing 104 adults with ADHD to a control group, the ADHD group reproduced 15- and 60-second intervals as shorter than the control group did and made larger errors ⁵. A Czech study found almost no difference on objective timing tasks between adults with more and fewer ADHD symptoms, who were grouped by questionnaire rather than diagnosed. Its authors note that qualitative research suggests people with more symptoms perceive more trouble managing time in everyday life ⁶.

What we don’t know

A review of adult research describes the studies as scarce and their results as inconsistent ². The laboratory tasks measure seconds. Nobody has shown how well they predict being late for work or misjudging an afternoon.

Tools for managing time are also under-tested. One randomised trial gave children with ADHD time-skills training together with time aids, and their time-processing ability improved more than in the comparison group ⁷. Daily time management improved according to the parents’ ratings, but did not change significantly according to the children’s own ratings ⁸. We found no comparable trial in adults.

Things to try

These come from general research on time estimates, not from ADHD trials.

• Use a measured time instead of a remembered one. In three experiments with simple tasks such as counting paper, telling people how long a similar task had actually taken, for them or for others, made their next estimate more accurate ⁹.
• Estimate the steps, then add them up. In three experiments, people allowed more time when they estimated each step separately than when they estimated the whole task at once ¹⁰.
• Keep the remaining time in view. This is what visual timers are for. The evidence is the children’s trial above, so treat it as an option to test for yourself.