Is anyone aware of any cognitive/academic research/performance factors around the use of delimiters in larger numbers? And more specifically, the speed at which humans process them?
Example with delimiters
As an example, in the UK and some other countries, comma's (,) are used to delimit large numbers (in thousands):
6,454 1,532,456 23,434,8881 2,881,345,663
Without delimiters, these numbers are much harder to read and often end in people making trivial mistakes in reading, interpreting and indeed entering them (as they have to delimit them mentally):
Example without delimiters
6454 1532456 234348881 2881345663
I'm very much aware that standards differ (culturally) and for different nations using delimiters, but want to understand if anyone has come across any related performance material and/or error rates.