1. A method performed by one or more server devices, the method comprising: constructing, by one or more processors of the one or more server devices, a probability model, from information regarding computer based search result interactions of a user, to estimate a probability that the user will select a certain type of specialized search result, wherein constructing the probability model from information regarding the computer based search result interactions of the user comprises constructing the probability model based on a quantity of past selections by the user of search results that are members of the certain type of specialized search result; searching, by one or more processors of the one or more server devices, sources of information based on a search query received from the user to determine a set of search results; using, by one or more processors of the one or more server devices, the estimated probability to select, from the set of search results, one or more search results that are of the certain type; and outputting, by one or more processors of the one or more server devices and in response to the search query, the selected one or more search results for presentation to a user via a computing device of the user, wherein outputting the selected one or more search results for presentation to the user comprises: outputting other search results that are of the set of search results but not of the certain type, and outputting the selected one or more search results for display to the user in a visually distinct manner relative to the other search results.