Research Methods Psychology Day care

Types of sampling:

• Random: Sample where researcher choose a target population, a sampling framce and has no pre-planned influence on which person to choose. Every participant has an equal opportunity to be chosen.
• Systematic - The researcher has a system for choosing participants from a sampling frame e.g. every 10th name
• Quota - Makes the sample representative e.g. differnt cultures, gender etc.
• Volunteer/self-selected: Participants who choose themselves to participate. Can filter to get quota sample.
• Opportunity: Any group of the target population that is readily available to the researcher
• Snowball: Initial group is selected. Sample grows through personal recommendation

Random:

• Wider range of participants
• Sample size is controlled
• May not be representative

Systematic:

• Sample size controlled
• Reliable
• Biased group
• May not be representative

Quota:

• Divided into groups
• Can make sample representative
• May be hard to find enough participants to fill the quota

Volunteer/self-selected:

• Consent is easy to gain
• Gets around alot of ethical issues
• All volunteers may have strong views
• May not get enough volunteers
• May not be representative

Opportunity:

• Sample size is controlled
• Target group readily available
• May not be representative

Snowball:

• Participants more likely to give consent
• May have skewed responses if participants discuss answers
• May only get one social group