Is it true that the average human dream lasts 2-3 seconds only?

Question

Is it true that the average human dream lasts 2-3 seconds only?

Answer 1

REM sleep  periods,  and therefore dreams,  last  typically in the

range of 5 to 45 minutes.  Often, the subjective time spent  in a dream is much  longer.   One possible explanation for this time-stretch effect  is  that  dreams are  combined  from  pieces that   have their   own   different setting in time.  You first dream of  something that occurred  a year ago, then-following - of  something that occurred  just recently, mix them up a bit and are left with the remembrance of a dream that lasted a year.

But experiments suggest that dreamed actions run in "real time" - what

you do in your dream  takes exactly this time  to dream. With external

influences like the radio  running in the  morning, you have  both the

real time in which  you hear something  and - sometimes -  the feeling

that  it   lasted considerably longer.  Anyway,  time  is  one  of the

perceptions that are heavily distorted in dreams.

Answer 2

You could have a dream that is as short as 2-3 seconds, but also long -like 45 minutes. That is old information that we dream only a short period.