What research methods did Watson accept for a scientific psychology?
When psychology of science began formally, it was ambitious to associate itself respectable, older, well-developed science, which is natural, of physics. The novel psychology adapted methods of science which was natural to its own requirements. This habit is very overt with behaviorism.
Watson contended that psychology curbs itself to the information of sciences which are natural, to what can be seen. To keep it simple, psychology should curb itself to the detached behavioral studies.
Only the strictly detached methods of examination were adequate in the laboratory of the behaviorists. According to Watson, such methods comprised of, a) observation without and with the usage of instruments, b) methods of testing, c) methods of verbal report and d) methods of reflexes which were conditioned.
Observation is an essential base for fellow methods. Detached methods of testing were in usage already, however, Watson expected that results of the test should be treated like samples from behavior instead of signals of qualities of mind.