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A person has a lisp when they cannot correctly pronounce the /s/ and /z/ sounds. This common type of functional speech disorder affects many children and adults. Usually, the lisp develops in early childhood and goes away on its own as the child grows up, but some people have a lisp throughout their lives. There are 4 types of lisps: interdental, lateral, dentalized, and palatal. Read on to understand more about the different types of lisps, their causes, and how lisps are t

Learning speech is a complex process. Even though the human brain is predisposed to learning patterns of language, sometimes our brains make their own rules for how language should be spoken, especially if a sound is hard to produce. These are called speech errors, and they are more common than you’d think. Leaving off an /s/ sound in consonant clusters is called cluster reduction, and it is a phonological error that a speech-language pathologist can help correct in speech th