There are mixed results in how important phonological information is to deaf individuals when reading and when that information is obtained.

For spoken language phonological information is required to understand how individual speech sounds (phonemes) combine and affect each other within words and across word boundaries.

A transcription is free to add phonological (such as vowels) or morphological (such as word boundaries) information.

The ways in which the phonological information in the lexicon constrains interpretations of the phonemic input is as follows.

When people read written information, dual-route theory contends that the readers access orthographic and phonological information to recognize words in the writing.

Schmitt et al. (2000) utilized the no-go N200 to determine the temporal processing of semantic and phonological information.

Thus, the researchers were able to conclude that semantic information becomes available before phonological information in language production.

They explained that disturbance in performance was caused by task-irrelevant phonological information using resources in the working memory system.

Researchers using direct questionnaires will present the subject with a set of questions that demand a specific answer and are designed to gather either lexical or phonological information.

We have seen that a mental lexicon must contain semantic, phonological and orthographic information about words.