Reliability vs Validity Flashcards
What is the reliability?
- How consistent the results are
What does the validity focus on?
Accuracy
What is internal validity?
Does the study measure what it is actually going to measure?
- does the researcher measure the variables
e. g Asch original study lacked internal balidity - found three types but later found fourth
What is external validity?
The results generability outside of the study
What are two types of external validity?
Population and ecological validity
What is population validity?
Can you generalise results in other population
e,g culture
gender
What is ecological validity?
Can you generalise to other social settings?
e.g Asch ‘s line judgement task conducted in a lab - lab exp have low ecological validity
What is investigator effect?
This is where the researcher consciously or unconsciously acts in a way to support their predication
e.g gender or age
What is demand of characteristic?
Occurs when the particpant is trying to make sense of research and acts accordingly to support aim of research
e. g Milgram prods or leading question in Loftus and Palmer
e. g Bandrua’s doll purpose was to hit it
What do both investigator and demand of characteristic lead to?
Social desirability
tendency to respond in the same way to different but similar stimuli.
SCREW YOU EFFECT - Messes up with data
What is population?
Large group of people that the researcher is interested in studying
What is sample?
Not possible to include all memebers of population so smaller group is selected
What can both the threats of inveastigator and demand of characteristics be controlled with?
Single blind or double blind technique
What happens in single blind technique?
Researcher knows the aim of the study but the particpants do not
What is double blind technique?
Neither the researcher nor the particpant knows
Latter technique involves a research assistant carrying out the data collection on behalf of the experimenter
