Which psychological principle do music streaming platforms like Spotify primarily use in their 'Discover Weekly' and personalized playlist algorithms to increase listener engagement and artist discovery?

Streaming platforms have revolutionized how consumers discover and experience music. Behind the scenes, sophisticated marketing strategies and psychological principles drive consumer behavior in this digital ecosystem. This trivia question explores how streaming platforms leverage consumer psychology to increase artist visibility and listener engagement. Test your knowledge about the intersection of music streaming, marketing, and consumer behavior!

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The Mere-Exposure Effect: increasing familiarity with similar but new music to build preference over time
The Decoy Effect: presenting an inferior option to make premium subscription tiers seem more valuable
The Scarcity Principle: limiting access to certain songs to create a sense of exclusivity and urgency
The Bandwagon Effect: showing only what's popular to encourage conformity in music selection