sampling

• Opportunity sample is when people are recruited based on convenor availability
• Volunteer sample- A sampling technique where participants put themselves forward to take part in research, often by answering an advertisement
• Systematic sample- A sampling technique where every nth person in a list of the target population is selected
• Stratified sample- A sampling technique where groups of participants are selected in proportion to their frequency in the target population
• Random sampling- A sampling technique where everyone in the target population has an equal chance of being selected
• opportunity sampling - strengths

  Easy method of recruitment which is time saving and less costly.
• opportunity sampling - Limitations

  • Not representative of the whole population hence lacks generalisability.
  • Researcher bias is presented as they control who they want to select
• Random sampling - strengths

  • No researcher bias researcher has no influence of who is picked.
• Random sampling - limitations

  • Time consuming need to have a list of members of the population (sampling frame) and then contacting them takes time.
  • Volunteer bias participants can refuse to take part so can end up with an unrepresentative sample