1. it answers the questions being investigated,
2. extraneous factors are controlled, and
3. the degree of generalization that can be made is valid.
it is a prepare proper freamwork within which the research work will be actually carried out.
Research design is the basic stone of a research.
Research objectives are important in that they give the researcher an idea as to what he or she hopes to discover through research.
the part of the population a researcher is interested in researching
Ex post facto is Latin for "after the fact". In terms of research it is a design in which research is done after the thing which is to be researched has occurred without any influence by the researcher.
the topic which have regional as well as national importance and one on which researcher can gather empirical data.
From my understanding, Primary and Secondary research are the difference in conducting the research. In Primary research, there is no data available for the researcher, hence the researcher has to start from scratch. This means that the researcher needs to design questionaires, collect data from respondents and then analyse the result. If you are doing secondary research, the researcher have the necessary data available. These data are made available through other publications or reports, like newspaper or annual reports of companies. If the researcher is doing secondary research, there is no need to start from scratch, he or she uses the data or information done by other organizations or publications. The important thing is that there are advantages and disadvantages for both methods. Primary research is more time consuming and costly. While some secondary research may not suit the researcher's needs.
In "Action Research" the researcher is part of the process under investigation; in "Experimental Research" the researcher tries not to influence the process.
There are many different kinds of research and many different kinds of researcher, so the answer is that a researcher can be either a specialist or a generalist, depending upon the type of research.
A research psychologist
a researcher
Primary research is how the human race discovers new things. Secondary research only allows you to learn about what others have already discovered (which is also important, of course, but not as important, since without primary research there would be no secondary research either).
A data researcher is someone who looks (research) for answers (data).