Psych Higher Terms Flashcards
Quantitate data definition
numerical data
Quantitative data advantages
objective, fast to analyse, easy to replicate
Stratified sampling
participants are proportionally representative of the real life group (e.g. half men half women), the composition of the sample reflects the proportions of people within the target population
Reliability
Consistency, get the same results twice, ease of replication
Internal validity
extent to which the results come from the IV affecting the DV, testing what is wanted to test, results not due to other factors
External validity
extent to which results can be generalised outside of the setting of the study
IV
Independent variable, manipulated variable
DV
dependant variable, measured variable
Random selection
All members of the population have an equal chance of being selected
Opportunity Sampling
When researchers simply decide to select anyone who happens to be willing and available to do their study
Systematic sampling
When every nth member of the target population is selected
Snowball sampling
Researcher relies on one participant in hopes that they will find others to join the sample and they will find more and more etc
Volunteer sampling
Involves participants selecting themselves to be part of the sample i.e. self-selection
Purposive sampling
Involves selecting a sample based on characteristics of a population and the objective of the study