Il professor Jacob Jolij dell'università di Groningen sostiene di aver messo a punto la formula che stabilisce quale canzone pop ha l'effetto più efficace sull'umore e innesca un'immediata voglia di scatenarsi. La formula, che raggruppa il tempo della canzone, insieme alla chiave musicale e al testo della stessa, ha stabilito che "Don't stop me now" dei Queen, del 1978, è il pezzo che negli ultimi 50 anni ha generato più benessere tra gli ascoltatori.
Jolij è riusciuto a creare una vera e propria classifica dei dieci pezzi, tra i successi dell'ultimo mezzo secolo, che rendono più felici, passando da "I will survive" di Gloria Gaynor a "Walking on a sunshine" dei Katrina and the Waves. E ancora Bon Jovi con "Livin' on a Prayer", oppure "Eye of the tiger" dei Survivor. Nella speciale graduatoria sono presenti anche gli Abba con "Dancing Queen", i Beach Boys con "Good Vibrations" e altri ancora.
La formula
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