Define and give an example of indirect measurement, validity and reliability.

Define and give an example of indirect measurement, validity and reliability. See attached file for full problem description.

What would be a threat to internal validity? What is an example?

What would be a threat to internal validity? What is an example? Validity in research study design usually refers to the tools used to measure aspects of the research question, for example a questionnaire is used in survey design and is said to have 'internal validity' if the questions are precise enough to get answers which address the aims of the study. For example if you want to know about body mass you need precise height measurements and precise weights for the results to have internal validity. 'External validity' is satisfied if these same questions are generalisable or transferable to other studies with similar aims but which deal with a different population, for example child... click for more

Inclusion and Exclusion Criteria

Can you describe inclusion and exclusion criteria of a research study? Any example would do.

Study design of post-test in research

Can you describe the study design of post-test? What is an example of this?

Study design of experimental and quasi-experimental

Can you describe the study design of experimental and quasi-experimental? What is the difference? Are there any examples to relate this to?