Which psychological principle do music streaming platforms primarily use to keep listeners engaged with their 'Discover Weekly' or similar personalized recommendation features?

Music streaming platforms have revolutionized how we consume music, but they also employ sophisticated consumer psychology principles to keep listeners engaged. From playlist curation to interface design, these platforms are carefully engineered to maximize user retention and listening time. Test your knowledge about how music streaming services leverage consumer psychology to shape our listening habits!

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The Baader-Meinhof Phenomenon (frequency illusion)
The Variable Reward Schedule (intermittent reinforcement)
The Von Restorff Effect (isolation effect)
The Dunning-Kruger Effect (cognitive bias)