Psychosocial durations:
  1. 0.4 seconds- to memorize each of seven nonsense syllables - according to Hermann Ebbinghous' classic experiment on human memory.
  2. 0.82 seconds - in adult to read a one-syllable word.
  3. 0.99 seconds - an adult to read a three-syllable word.
  4. One second - an adult to read a five-syllable word.
  5. 2.508 seconds - in adult to verify a negative sentence is true or false - experiment by Stanford University Professor Herbert H. Clark.
  6. 18 seconds - the number of larcenies committed in the United States increased by one.
  7. 20 seconds - to say 100 words - shortest time period.
  8. 22 seconds - to memorize each of a list of 36 nonsense syllables - Hermann Ebbinghous' experiment.
  9. 34 seconds - the number of auto thefts committed in the US to increase by one.
  10. 43 seconds - number of violent crimes (murder, rape, robbery, or assault) committed in the US to increase by one.
  11. 1 minute - the average adult to read 300 words.
  12. 9 minutes - the number of traffic fatalities due to collision in the US increased by one.
  13. 14 minutes - number of forcible rapes in the US increased by one.
  14. 2 years -
  15. Three years - for a child to develop mentally to the extent that he can identify emotions expressed in facial expressions, for example laughter - study by  Landis.
  16. 6 years - children to mature enough to grasp number concepts - not just recite by rote.
Source: Durations: The Encyclopedia of How Long Things Take (1977) by Stuart A. Sandow.