english: An example of a great psychological idea: the single best improvement in passenger satisfaction on the London Underground, per pound spent, came when they didn't add any extra trains, nor change the frequency of the trains; they put dot matrix display boards on the platforms -- because the nature of a wait is not just dependent on its numerical quality, its duration, but on the level of uncertainty you experience during that wait.
non_english: Tole je primer odlične psihološke ideje: najpomembnejša izboljšava zadovoljstva potnikov na londonski podzemni železnici glede na vsak vložen funt se je zgodila brez dodatnih vozil ali spremembe njihove pogostosti, temveč ko so na perone uvedli ekrane s točkastimi oznakami položaja vozil. Kajti narava čakanja ni odvisna samo od njegove numerične lastnosti, njegovega trajanja, temveč od ravni negotovosti, ki jo občutite med čakanjem.