1. AND will narrow your searches
2. OR will broaden your searches
3. NOT will narrow your searches to exclude a particular term

1. TX All - Text (selecting this field will tell the database to only search for a keyword in the full text of the article)
2. AU author - (selecting this field will tell the database to only search for a keyword in author field in the article record)
3. Abstract - (selecting this field will tell the database to only search for a keyword in the Abstract of an article, if the article has an abstract. Not all articles have an abstract.
4. Select a Field (optional) - Many databases have a default search, that let’s the database decide where to search.

PsycINFO has many useful search filters. You will need to scroll down to find them.

1. Tests and Measures
2. Age Groups
3. Population Groups
4. Methodology

Scopus, the database,  allows you to sort your search results by the number of times an article is cited. 

1. Sorting by the number of times cited is available when in the results screen, on the far right drop-down menu.

1. Google Scholar gives you the number of times an article is cited. Unfortunately, you cannot list search results by the number of times, an article is cited in Google Scholar. This makes Google Scholar less effective for citation searches.

Notice that the same article by George B.Graen and Mary Uhl-Bien entitled “Relationship-based approach to leadership: Development of leader-member exchange (LMX) theory of leadership over 25 years: Applying a multi-level multi-domain perspective” reports a different citation count when you compare the results between Scopus and Google Scholar.