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34 Cards in this Set
- Front
- Back
- 3rd side (hint)
List the types of scientific investigations |
Observations, controlled experiments, surveys, trial and error, case studies, and longitudinal studies |
There are 6 types |
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Explain what an Observation is |
Where someone looks for patterns that allow for problems and conclusions |
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Explain Controlled Experiments |
Where variable relationships are investigated |
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Explain surveys |
A collection of data on a specific topic that has a large sample, is random, and involves an interview or questionairre |
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Explain what Trial and Error is |
Continual attempts to solve a problem by recording trials and results over a long period of time |
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Explain case studies |
An in depth focus on one situation or person |
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Explain longitudinal studies |
A prolonged case study that can span months or years |
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Describe the scientific method |
1. Recognise problem. Define question 2. Collect subject information 3. Hypothesis 4. Test hypothesis 5. Analyse and interpret data 6. Conclusion 7. Report |
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What is involved in planning an investigation? |
Literature reviews, safety, ethics, controlling variables, repetition and replication, validity, and reliability |
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Define uncontrolled variables |
Variables that are overlooked or unable to be controlled |
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Define repetition |
The action of repeating of an experiment |
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Define replication |
Running multiple identical experiments at once or testing on a large number of participants at once |
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What are advantages of replication and repetition? |
Both create more consistent results, which are more accurate due to larger numbers/amounts of repetition |
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Define validity |
When a hypothesis is properly tested; when variables are controlled |
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Define reliability |
How consistently an experiment receives the same result each time it's performed; achieved with accurate equipment |
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Does good reliability or validity create accuracy in an experiment? |
No |
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What's one way that can be used to test reliability of data? |
By averaging it |
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Define quantitative data |
Numerical data |
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Define qualitative data |
Non-numerical data |
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What is a literature review? |
When a scientist surveys material on a subject of interest. Found by library research, the internet, and scientific journals. Its purpose is to help define a problem, obtain current knowledge, assess research methods, and relate findings to own interests. |
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For an investigation to be safe, the scientist must: |
1. Assess investigation design 2. Use safety devices/clothing 3. Find out allergies/health issues 4. Be aware of mental health/trauma/anxieties of participants |
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What sort of ethics should be considered during an investigation? |
1. Voluntary participation 2. Risk of harm 3. Informed consent 4. Confidentiality |
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Define variable |
A factor that may be controlled or changed |
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Define independent variable |
The x variable; deliberately altered to determine its effect |
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Define dependent variable |
Variable Y; its reactions to changes in the X variable are measured; the variable being tested |
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Define controlled variables |
Factors that are kept the same to prevent their interference with the subjects being tested |
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Define uncontrolled variables |
Variables that are overlooked or not able to be controlled |
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Define repetition |
Repeating an experiment |
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Define replication |
Running multiple identical experiments at once or testing a large number of participants at once |
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What are the benefits of repeating and replicating experiments? |
1. More accurate due to a larger number of people/experiments 2. Both demonstrate whether results are consistent |
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Define validity |
Whether you are properly testing your hypothesis; having controlled variables |
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Define reliability |
The extent to which you consistently get the same result from an experiment each time it is performed; having accurate equipment |
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Are reliable and valid tests necessarily accurate? |
No |
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How would you explain reliability being maintained in the data? |
By finding the average |
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