Systematic sound preference asa characteristic of phonological disability

Systematic sound preference was described as a common phonological process seen in young children with unintelligible speech. In its classic form, sound preference occurred when an entire class of sounds was replaced by one sound. Sound preference most commonly occurred in the word-initial position and affected fricatives more frequently than any other manner category. In cases where sound preference did not affect all members of a manner of production, it affected the voiceless and/or non-labial sounds.