Sampling

• Opportunity sampling- researcher selects whomever is nearest. Links to researcher bias. Easy but not representative.
• Random sampling- system that gives the population an equal chance of being picked.

  Potential to be unbiased.
• Stratified sampling- layers of target pop. selct ratio of sub groups.
• Systematic sampling- every nth person selected.
• volunteer sampling
• Independant measures- Group split into two- each group does different Iv
• Repeated- group does both v
• matched paiers