Experimental methodology /
Larry B. Christensen.
- 7th ed.
- Boston : Allyn and Bacon, 1997
- xiv, 590 p. : ill. ; 25 cm.
what is science? descriptive research approaches the experimental research approach problem identification and hypothesis formation ethics variables used in experimentation control in experimentation techniques for achieving constancy experimental research design quasi-experimental designs single-participant research designs data collection hypothesis testing external validity the research report