6. PubMed has a term mapping feature that handles the grammatical variations for most terms fairly well. Thus, you often retrieve more articles using this built in feature, rather than trying to build the search using truncation. Adding synonyms may be beneficial. Let’s try the search again and add some synonyms.

After clearing the “Query box”

type the following in the search box:

phonological AND children AND (treatment OR intervention OR therapy) AND

(disorder OR delay OR impairment)

and select “Search.” This search nearly than doubled the number of results.