What is the psychology behind tarot cards?

I'm curious, could you explain the psychological foundations of tarot cards? Do they serve as a form of self-reflection or is there something deeper at play, like the interpretation of subconscious desires? I'm fascinated by the idea that they could provide insight into one's emotional state or even guide decision-making. Can you elaborate on the psychology behind the symbols and the way they might influence individuals who consult tarot cards?