ماک تست آیلتس آنلاین؛ رایگان و شبیه آزمون کامپیوتری

AIn the 1880s, the German psychologist Hermann Ebbinghaus set himself an unusual task. He wanted to study memory without any help from meaning, so instead of real words he learned long lists of nonsense syllables such as ‘WID’ and ‘ZOF’. He then tested himself to see how quickly they faded. The results were discouraging: a large part of each list was gone within a day.

BEbbinghaus also noticed something more hopeful. When he went back to a list several times and spread those sessions over a number of days, he needed less and less time to learn it again. Psychologists now call this the spacing effect.

CAlmost a century later, the science journalist Sebastian Leitner turned the idea into a simple box of cards. A card that is answered correctly moves forward and is reviewed less often, while a card that has been forgotten returns to the first compartment. Because the method needs nothing more than paper, versions of the box are still sold today.

DModern vocabulary apps rely on the same principle but calculate review dates automatically. Critics point out, however, that spacing only helps with material that has already been understood; it cannot replace explanation.