title: An Overview of Sleep as an Experimental Variable (1940-1959).
abstract: Less than one half of 1 percent of the psychological literature relates to sleep. Although there has been a relative decline in such research, the central nervous system and pathological aspects have recently received increased attention. The United States is producing less than 17 percent of the research on sleep.
authors.forename: W B
authors.initials: WB
authors.lastname: Webb