3888363
Beschreibung
Karteikarten von chloemockri12, aktualisiert more than 1 year ago
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Erstellt von chloemockri12
vor etwa 9 Jahre
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| Frage | Antworten |
| What is the definition of opportunity sampling? | Taking the sample from people who are available at the time the study is carried out and who fit the required criteria |
| Name strengths of opportunity sampling | 1. Quick and easy way to select participants 2. Economical 3. Less chance of data being withdrawn |
| Name weaknesses of opportunity sampling | 1. Very unrepresentative of target population 2. Biased- researcher may be more likely to choose participants who appear 'helpful' 3. More chance of demand characteristics |
| What is the definition of volunteer sampling? | Consists of participants becoming part of a study because they volunteer in response to an advert |
| Name strengths of volunteer sampling | 1. Easy to recruit participants 2. Economical 3. Less time consuming |
| Name weaknesses of volunteer sampling | 1. More prone to sample bias as only people with compliant personalities may apply 2. Location of advert can affect who volunteers |
| What is the definition of random sampling? | Every member of the population has an equal chance of being allocated for a study |
| Name strengths of random sampling | 1. It should represent the target population 2. Eliminates sampling bias as everyone is a potential candidate |
| Name weaknesses of random sampling | 1. Hard to get the target population as they may not consent after being chosen 2. Difficult to achieve as very time consuming and costly |
| What is the definition of stratified sampling? | The researcher identifies the different categories of people that make up the target population and works out the proportions needed for the sample to be representative |
| Name strengths of stratified sampling | 1. The sample should be highly representative of the target population and thus the researcher can generalize from the results obtained 2. Minimise's risk of sample bias |
| Name weaknesses of stratified sampling | 1. Can be very time consuming as percentage of categories have to be identified and calculated accurately 2. Is unusable when researchers cannot confidently classify every member of the target population into a subgroup |
| What is the definition of systematic sampling | Participants are chosen in an orderly or logical way (every nth person on a list of names.) The chosen data is evenly distributed |
| Name strengths of systematic sampling | 1. Relatively easy to construct, execute, compare and understand - ideal for studies with tighter budgets 2. Less chance for bias as researcher cannot influence who is chosen- randomisation |
| Name weaknesses of systematic sampling | 1. Can be very time consuming 2. Researchers may be able to manipulate their system in order to increase likelihood of a targeted outcome rather than letting random data produce a representative answer |
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