7 sounds about right. When I see a number of stuff in front of me I can quickly grasp how many there are up to about 7. 8 already becomes two fours. 9 is 3x3 or 4+5 depending on how the objects are clustered.
Though I think I can estimate up to about a thousand. Usually by comparing to stuff I have already seen in that ballpark.
adespoton@lemmy.ca 3 days ago
As an average, I usually see the number 7 bandied around. After that we start “chunking” where each group becomes its own conceptual object.
This is why phone numbers without the area code have 7 digits in North America.
Neuromancer49@midwest.social 3 days ago
That’s not quite the same thing - the 7 digit phone number has more to do with short-term memory capacity than visual perception. Miller’s Law of short-term memory is we can store 7 +/- 2 items at a time, depending how complex they are.
…wikipedia.org/…/The_Magical_Number_Seven,_Plus_o…