Participant Sampling Flashcards
population
all people (or items locations etc) of interest who you want your results to generalize to
sample
individuals in your study
probability sampling
use some form of random selection
requires setting up a procedures that assures the different members of your population have equal probabilities of being chosen
non-probability
not random, may or may not represent population well even with a large sample size.
convenience sampling
purposvie sampling
Simple random sampling
each has an equal changes of being selected. (picking from hat)
systematic random sampling
selecting one member randomly and then choose addition members at evenly spaced intervals. select every 5th on the list
stratified samlping
population divided into different groups based on criteria
simple random from each group
cluster sampling
select clusters from population on the basis of simple random sampling, then same all the people in the cluster
multistage sampling
combine different methods of probability sampling
cluster, then random
convenience sampling
participants chosen not random - like college students, local volunteers
purposive sampling
specific predefined groups that we seek
sampling for proportionality is not the primary concerns
quota sampling
select non randomly according to fixed quota
can be proportional or non-proportional
heterogeneity sampling
sample to include all opinions/views, but not representing these views proportionately
snowball sampling
eligible participants to recommend others who may qualify
random assignment
ideal way to divide your sample into groups
counterbalancing
used to overcome order effects
within-subjects counterbalancing
each subject goes through each condition one or more times
reverse or block
across-subjects counterbalancing
each gets one sequence but they differ across people
partial counterbalance
randomized counterbalancing,
-each different random sequence
Latin square counterbalancing
Balanced latin square counterbalancing
A square of sequences such that each condition appears
only once in any order position in the sequences AND follows each other condition an equal number of times