1-6 Flashcards
population
large group including all potential subjects
large group including all potential subjects
population
sample
small subgroup of subjects chosen from the population
small subgroup of subjects chosen from the population
sample
What are the types of sampling?
random, convenience, nonrandom
random
a sample in which every member of the population has an equal chance of being chosen
a sample in which every member of the population has an equal chance of being chosen
random
convenience
??
e.g., college students
??
e.g., college students
convenience
nonrandom
a sample from a specialized population (e.g., college students)
a sample from a specialized population (e.g., college students)
nonrandom
When a study is conducted on the internet, why is the sample nonrandom?
because the participants are people who have access too, and know how to use, a computer
similar to traditional research (flyers, on the news) because it’s doing the same thing, focusing on a single population
How does voluntary participation affect the external validity of the study?
participants must voluntarily join the study. Because of this the sample doesn’t necessarily represent the population.
What factors affect people’s decision to volunteer?
participant-related characteristics (not wanting to answer questions because of your personality)
situational factors (not wanting to join study because of what it might do i.e. cause stress or aversiveness)
How do we reduce volunteer bias?
be aware of it and take it into account
