LEC 1 Introduction To Research & Scientific Methods Flashcards
Research definition (2)
- a systematic investigation to designed to develop or contribute to the general knowledge
- includes research development, testing & evaluation
Objective of research (1)
To extend the knowledge of physical, biological & social world beyond what is already known
Objective of research (1)
To extend the knowledge of physical, biological & social world beyond what is already known
Scientific Method definition (2)
- systematic process used in research
- hypothetico-deductive method
Research process steps (8)
- Formulate a research question
- Construct a research design
- Construct an instrument for data collection
- Select a sample
- Write research proposal
- Collect data
- Process data
- Write research report
Decide what to do : 1
Planning on how to do : 2-5
Conduct of study : 6-8
Why is it important to develop an appropriate study design? (3)
- study design determines how the data and results are obtained
- determine the strength, validity & reliability of the results obtained from the study
- faulty design leads to misleading findings & misinterpretation of results
2 types of validity
- Internal validity
2. External validity
Internal validity definition
- the degree to which the observed findings leads to the correct phenomenon taking place in the study population
External validity definition
- the degree to which the observed finding leads to the correct phenomenon taking place in the universe/general population
2 types of errors
- Random error
2. Systematic error
Random error defintion
- degree to which a variable has nearly the same value when measured several times
- affects precision
Systematic error definition (3)
- degree to which a variable actually represents the true value in the population
- affects accuracy
- due to the presence of bias in the study design
Research instrument definition (2)
- a tool designed to collect data of the study
- if newly developed, need to do validation / pre-testing of the research instrument
Research proposal
- includes the details of the operational plan for obtaining answers to the research questions
- how, what, why
Types of data collected (2)
- Primary data
2. Secondary data