the previous two units we have discussed the purpose
of research, the research report, subject selection,
and the various types of research design.
The final unit, including this chapter, will
begin to add quantitative knowledge to your research
repertoire, which will allow you to critically
analyze not only the methodologies of research but
also the statistical results.
Before analyzing any data, however, and even
before testing any subjects, the issues of variable
selection and control, reliability, and validity
must be addressed.
purpose of any research is to determine if a theory
is supported or not based on statistical analysis. A theory is an educated guess about a relationship but in
order for research to be conducted on a theory, it
must first be operationalized.
To operationalize a theory, all variables
must be defined and the methods of conducting the
research must be determined.
Once this is done, the resulting statement
about the relationship is called a hypothesis.
The hypothesis is what gets tested in any