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34 Cards in this Set

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List the types of scientific investigations

Observations, controlled experiments, surveys, trial and error, case studies, and longitudinal studies

There are 6 types

Explain what an Observation is

Where someone looks for patterns that allow for problems and conclusions

Explain Controlled Experiments

Where variable relationships are investigated

Explain surveys

A collection of data on a specific topic that has a large sample, is random, and involves an interview or questionairre

Explain what Trial and Error is

Continual attempts to solve a problem by recording trials and results over a long period of time

Explain case studies

An in depth focus on one situation or person

Explain longitudinal studies

A prolonged case study that can span months or years

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

What is involved in planning an investigation?

Literature reviews, safety, ethics, controlling variables, repetition and replication, validity, and reliability

Define uncontrolled variables

Variables that are overlooked or unable to be controlled

Define repetition

The action of repeating of an experiment

Define replication

Running multiple identical experiments at once or testing on a large number of participants at once

What are advantages of replication and repetition?

Both create more consistent results, which are more accurate due to larger numbers/amounts of repetition

Define validity

When a hypothesis is properly tested; when variables are controlled

Define reliability

How consistently an experiment receives the same result each time it's performed; achieved with accurate equipment

Does good reliability or validity create accuracy in an experiment?

No

What's one way that can be used to test reliability of data?

By averaging it

Define quantitative data

Numerical data

Define qualitative data

Non-numerical data

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.

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

What sort of ethics should be considered during an investigation?

1. Voluntary participation


2. Risk of harm


3. Informed consent


4. Confidentiality

Define variable

A factor that may be controlled or changed

Define independent variable

The x variable; deliberately altered to determine its effect

Define dependent variable

Variable Y; its reactions to changes in the X variable are measured; the variable being tested

Define controlled variables

Factors that are kept the same to prevent their interference with the subjects being tested

Define uncontrolled variables

Variables that are overlooked or not able to be controlled

Define repetition

Repeating an experiment


Define replication

Running multiple identical experiments at once or testing a large number of participants at once

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

Define validity

Whether you are properly testing your hypothesis; having controlled variables

Define reliability

The extent to which you consistently get the same result from an experiment each time it is performed; having accurate equipment

Are reliable and valid tests necessarily accurate?

No

How would you explain reliability being maintained in the data?

By finding the average