positivism
behaviorism
empiricism
methods
This mid-twentieth-century more moderate version of logical positivism informs contemporary mainstream thinking in the philosophy of social science. It is represented in the work of Ernest Nagel (1901–1985), Hans Reichenbach (1891–1953), Rudolph Carnap (1891–1970), Carl Hempel (1905–1997), and to some extent Karl Popper (1902–1994) in The Logic of Scientific Discovery (1958). [Source: The SAGE Dictionary of Qualitative Inquiry; Logical Empiricism]
logical empiricism