There’s a theory called the Mozart Effect which found that listening to Mozart’s music improved memory and concentration. This has now been found to be true for all kinds of music!

The real Maria von Trapp bagged a cameo in the film! During the scene when Julie Andrews sings ‘I Have Confidence’, you can see her walking past an archway. She liked the film but was annoyed at how geographically inaccurate the depiction of Austria was.

The terms "introversion" and "extraversion" were coined by Carl Jung, but the concept is included in virtually every psychological model of personality. Introverts derive their energy from within rather than from external stimuli. This doesn't mean that they don't enjoy the company of friends, but they likely feel uncomfortable in mass gatherings.