What is the marketing term for the psychological pricing strategy where prices end in .99 or .95 (like $19.99) to make products appear less expensive to consumers?

In the world of retail and marketing, pricing strategies often employ psychological tactics to influence consumer behavior. One of the most prevalent techniques is charm pricing, where prices end in 9, 99, or 95. This poll tests your knowledge about the psychological pricing phenomenon that has shaped modern retail for decades. Do you know the official term for this ubiquitous pricing strategy that makes $9.99 seem significantly less expensive than $10.00 in consumers' minds?

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Left-digit effect
Anchoring bias
Price framing
Threshold pricing