Table 1.

Studies in which research productivity was assessed

Study	Level of assessment	Country	indicator variables1	Sampling epoch2
Brocato 2005 [10]	Individual	US	peer-reviewed journal articles	2 years
	474 faculty members in family medicine departments		national conference presentations
			national grants
Cox 1977 [11]	Institutional	US	papers in the APA journals	5 years
	76 graduate programs in psychology
Dakik 2006 [12]	Individual	Lebanon	journal papers (Medline articles only)	5 years
	203 medical faculty staff at a university in Beirut
Ellwein 1989 [3]	Individual and Departmental	US	journal papers	3 years
	Faculty members in 12 departments of a university medical faculty
Howard 1987 [6]	Institutional	US	papers in APA journals	10 years
	75 institutions granting doctoral degrees in psychology
Iyengar 2009 [13]	Individual	US	journal papers	2 years
	158 individual faculty members of a school of medicine		grant income
			research space used
Kranzler 2011 [14]	Institutional	US	papers from PsycInfo database	5 years
	59 institutions offering doctoral programs in school psychology
Mezrich 2007 [4]	Individual	US	peer-reviewed papers	1 year
	Members of a large university radiology department		other publications
			grants
Salaran 2010 [15]	Individual	Australia	books (single or multi-author)	3 years
	271 academic staff in 5 universities in Melbourne		papers in refereed journals
			edited books
			chapters in refereed books
Tien 1996 [16]	Individual	US	publications	2 years
	2586 faculty members in US universities
Toutkoushian 2003 [17]	Institutional	US	publications (ISI)	1 year
	1309 colleges and universities
Wagner 1994 [18]	Departmental	US	publications in 6 family medicine journals	5 years
	Family medicine departments

¹In some studies publication credit was adjusted to take account of the journal Impact Factor and/or the author position in articles with multiple authors.

²Period over which data were collected. Some studies collecting data over 5 years reported it for shorter periods.