Slides Week 1 Flashcards Preview

Evidence Based Approach > Slides Week 1 > Flashcards

Flashcards in Slides Week 1 Deck (23)
Loading flashcards...


- Acquiring Knowledge through superstition or habit
** Non Scientific



- Acquisition of knowledge not based on reasoning or inference.
** Non Scientific



- Acceptance of information from highly respected sources
** Non Scientific



- Acquisition of knowledge via reasoning
** Non Scientific



- Acquisition of knowledge through experience
** Non Scientific


Why do we need the scientific method?

Human judgement is not trustworthy or reliable
• Reliance on intuition (e.g., Asch studies )
• Heuristics/biases
• Perception vs. reality
• Human observation
• Reliance on authority


Evidence must be reproducable

- other people need to be able to be reproduced and verified by others.
- Objective evidence requires an objective process


Goals of science:

- Describe
- Predict
- Determine Cause
- Explain


Good Scientifice Research is . . .

- Based on work of others
- can be replicated
- generalisable to other settings
- based on logical rationale
- tied to theory
- is doable
- generates new questions
- is incremental
- is apolitical actiity


Hypothetico-Deductive Model of Scientific Research

- Karl Popper: The Logic of Scientific Discovery (1959)
"There can be no statements in science which cannot be tested, and therefore none which cannot in principle be refuted, by falsifying some of the conclusions which can be deduced from them."
Can we ever know the absolute truth?


Describe the Scientific Method

- a way of observing, thinking about problems
- solving problems objectively and systematically
- a process for answering questions


Scientific Method - The Process

1. Asking a question
2. Identify important answers
3. Formulate a hypothesis
4. Collect relevant information
5. Test they hypothesis
6. Work with the hypothesis
7. Reconsider the theory
8. Ask new questions


Scientific Method - Asking a Question

- questions come as a result of curiosity
- finding an answer becomes necessary
- Questions guide the direction research takes


Scientific Method - Identify Important Factors

- Some factor could be age, gender, experience, motivations, campaign valence
Factors should:
- not previously investigated
- contribute to understanding
- available to investigate
- personally and/or professionally interesting
- Lead to other questions


Scientific Method - Formulating a Hypothesis

- A Hypothesis is an educated guess "if . . . then"
- A good hypotheses are declarative
- posit an expected relationship
- reflect the theory and literature
- are brief and to the point
- are testable


Scientific Method - Collecting Relevant Information

- We set out to test the hypothesis not to prove them.
- Try to reveal the truth as much as possible whether we like it or not
- Being wrong isn't bad, it creates more questions
- always another question to ask


Scientific Method - Test the hypothesis

- how do you know if you have a difference or not
- How do we know it is not just a random differences
- Inferential statistics allow us to assign probability levels to findings
- Is the difference real or due to chance or something else


Scientific Method - Working with the hypothesis

- Does the data support your hypothesis
- Results provide a valuable outcome either way?
- Will the scientific community value 'null' results?


Scientific Method - Reconsider the theory

- All theories are tentative - they evolve over time
- Observations in science must be replicable
- Science acknowledges it is fallible
- Nothing is ever proved absolutely
- Scientists remain sceptical and alert to alternative explanations
- Science and research are essentially a matter of attitude - a genuine desire to understand the way things are


Basic Research

- Tries to answer FUNDAMENTAL questions about the nature of behaviour
- Often designed to address theories about cognition, emotion, motivation, neuropsychology
- Doesn't seek to solve problems
- arises our of curiosity and Theory; no specific applications in mind
- High degrees of control
- emphasis on refutin or supporting theories
- explain how the world works


Applied Research

- Conducted to address practical problems and potential solutions
- Takes place in the 'real world'
- strict research protocols may need to be relaxed


Basic vs Applied Research

- Both are important and neither can be considered superior to the other
- Progress in science is dependent on synergy between basic and applied research
- Applied research is guided by basic research investigations


Inferential Statistics

Using random samples of data to about a population to describe that population