Phonemic restoration as we perceive speech in a noisy party is an example of—

• Top-down processing: The phonemic restoration effect demonstrates how our brain uses pre-existing knowledge, expectations, and context to understand speech.
• Perceptual Filling-in: The brain has an automatic tendency to fill in missing speech sounds, such as phonemes, when they are being masked out by ambient noise.
• Cognitive Dominance: This effect demonstrates that perception is not entirely driven by our senses, but is, in fact, driven by our mental processes, such as cognition and memory.
• Contextual Support: The context in which we hear words, such as grammar and meaning, is what allows us to correctly understand unclear words.
• Adaptive Function: This cognitive processing has helped humans communicate effectively in all sorts of environments, despite our senses being unable to fully process all speech signals.

This is an example of top-down processing because the brain fills in missing sounds using context and prior knowledge. It is not the cocktail party effect, which refers to focusing on a specific sound or voice in a noisy environment.