Nonsense syllables are made-up combinations of letters that do not have any meaning in a language. They are often used in psychological experiments to study memory and learning. By using these syllables, researchers can focus on how people remember sounds and patterns without the influence of existing words. These syllables typically consist of consonant-vowel combinations, such as ba, ti, or zo. Because they lack meaning, nonsense syllables help eliminate biases that might arise from familiar words. This makes them useful tools in fields like cognitive psychology and linguistics for understanding language processing and memory.