Geographical investigation Flashcards
(37 cards)
What are the three phases of fieldwork of Geographical Investigation (GI)?
Pre-fieldwork, fieldwork, post-fieldwork phase.
What do you do for the pre-fieldwork phase?
Analyse the GI question.
What do you do for the fieldwork phase?
Gathering data
What are the three steps during the post-fieldwork phase?
- Representing data
- Writing conclusion
3.Reflection and evaluation
What is the meaning of sampling?
Sampling is the process of selecting individuals from a population or choosing a smaller group which has similar characteristics that represent the entire population.
Why do we need to use sampling?
Sampling is done as it is impossible and impractical to collect information from the whole population and there are also limitations on time and resources.
How many sample size is required?
A sample size of at least 30 is preferred in order to conduct a real sable analysis of the data.
What is probability sampling?
Probability sampling means that samples are randomly selected, without the researcher’s conscious decision.
This can be done using a random number generator.
Has a greater chance of creating a representative sample.
What is Non-probability sampling?
Samples are non-randomly selected, meaning that the researchers subjectively selects samples, such as family or close friends.
Samples are unlikely to be representative as the selection is likely to be biased.
When is probability sampling use?
It is used when you need a more representative sample.
When is non-probability sampling use?
It is used when it is unnecessary or impractical to select a representative sample, and when sample needs to be conducted quickly due to time constraints.
What are the two examples/types of probability sampling?
Simple random sampling and stratified random sampling.
What is simple random sampling?
- Decide on the desired sample size (e.g. 10)
- Assign a number to every member of the population being sampled (e.g. 1-100)
- Use a random number generator to generate random numbers until the desired sample size is reached (e.g. 42,10,9,72,88,14, etc.)
- Select the sample using the random numbers
What is stratified random sampling?
- Decide on the desired sample size
- Identify the makeup the population according to the relevant sub-group (e.g. of percentage of male/female?)
- Calculate how many individuals need to be selected from each sub-group of the population (the ratio needs to be PROPORTIONATE)For Stratified sampling, a proportional percentage of samples are selected using random sampling
- Use a random number generator to select the individuals to form the sample within each sub-group
What is convenience sampling?
Carried out in an ad hoc manner that is the most accessible to the researcher
Select any members of the population who are conveniently and readily available.
E.g. giving out a questionnaire survey to the 1st 100 people outside the train station on a Saturday morning.
Convenience sampling is an example of non-probability sampling? True or False?
True
How do you conduct an interview?
There are three steps
- Introduce yourself
Begin with “Excuse me Sir/Madam
Introduce your name and your role (student) and school - Provide information about your purpose
State that you would like to conduct an interview with them for a school project. - Invite the respondent to participate in the interview
—State the estimated duration of the interview
—Ask for the person’s permission to continue before taking any photographs or recordings.
If you require the respodents’ names or other personal information (e.g. age) for your data collection, you should get them to sign an interview consent form before proceeding with the interview.
What should you do during the post-interview phase?
After concluding the interview, it is useful to consolidate the key points from your interview in a summary table.This will allow you to easily refer to the information collected from the interview when doing your analysis and conclusion.
State 1 advantage and disadvantage of convenience sampling.
Advantage: Less tedious, easier to carry out
Disadvantage: Unlikely to be representative and is biased. May be either over representative or under representative.
State 1 advantage and 1 disadvantage of simple random sampling.
Advantage:
Representative as it allows everyone in the population (depending on the sample size) to have an equal chance of being selected.
Avoid bias
Disadvantage:
Tedious
May not be representative if sample size is too small.
May not be feasible because you need to know the entire population size
State 1 advantage and 1 disadvantage of stratified random sampling.
Advantage:
Unbiased. More precise, targeted to specific group
Disadvantaged:
May not be feasible because you need to know the entire population size.
How do you analyse a GI question?
As we begin our investigation, we must ask good questions to unpack and understand the focus of the GI. One way of generating additional questions to unpack the GI question is by using the 5Ws 1H method: ask questions starting with who / what / where / when / why and how.
What are some “who” questions to ask when analysing a GI question?
Who?
Who is affected by this issue?
Who lives in these places?
Who are the stakeholders involved?
What are some “what” questions to ask when analysing a GI question?
What?
What is it?
What are the impacts?
What do I think about it?
What information do I need to answer this question?