A two - week study of 48 volunteers, aged 21 to 38, showed that in just a few days, the constant sleep shortage reduced their mental abilities, including alertness and reaction time. All had previously averaged between seven and eight hours of sleep per night, but for the study they were now divided into four groups.
აღმოჩენა იმით არის ღირსშესანიშნავი, რომ სამარხებზე ბიბლიური მონაკვეთების წარწერა ფართოდ მხოლოდ ახ.