Participant selection Flashcards
the group defined by the researcher’s specific
interests
target population
the people that the research can realistically involve in the study
accessible population
A sample with the same characteristics as the population
representative samples
Participants or subjects are selected in
a manner that increases the
probability of obtaining a biased
sample
selection/sampling bias
what is the law of large numbers
its just another way to say central limit theorum from data analysis. sample size of 30 or greater is ideal
Participants are selected from a list containing the total population
simple random sampling
each individual has an equal chance of selection
sampling equality
choice of one individual does not influence or bias the probability of choosing another individual
sampling independence
what are the two principal methods of random sampling
- sampling with replacement
- sampling without replacement
what is sampling with replacement
an individual is selected and hen returned to population before next selection
what is sampling without repacement
individual is selected and removed before next selection is made
Every nth participant is selected from a list containing the total population
systematic sampling
the population is divided into subgroups, then equal numbers are randomly selected from each of the subgroups
stratified random sampling
what is cluster sampling
clusters (preexisting groups) are
randomly selected from a list of
all the clusters that exist within
the population
Individual participants are obtained by selecting those who are available
and willing
convenience sampling
what is quota sampling
subgroups to be included are identified. quotas established for individuals to be selected though convenience from each sub group
which sampling method requires you to know the exact list of the population
probability sampling
sampled based on your judgement, for specific purposes
judgemental sampling
Get someone interested in the work to recruit others for you - sampling through recommendations from current participants, growing your sample over time
snowball sampling
