RESEARCH METHODS (definitions) - Year 1 Flashcards
aim
a statement of what the researcher(s) intend to find out in a research study
debriefing
a post-interview technique - informing participants of the true nature of the study
ethical issues
concern questions of right and wrong within a study
extraneous variables
a variable that does not vary systematically with the IV and therefore does not act as an alternative IV but may have an effect on the DV (e.g. setting, illnesses)
hypothesis
an operationalised statement about the assumed relationship between variables (in an experiment)
independent variable
something directly manipulated by an experimenter in order to test its affects on another variable (DV)
dependent variable
the measured variable
informed consent
participants must be given information concerning the nature and purpose of the research and their role - so that they can make an informed decision about whether to participate
operationalise
making sure that variables are in a form that can be easily tested (e.g. ‘educational attainment’ needs to be specified, it might be operationalised as ‘GCSE grade in maths’)
standard procedures
a set of procedures that are the same for all participants in order to be able to repeat the study, including standardised instructions
confounding variable
a variable that is not the IV but DOES vary systematically with the IV. changes in the DV may be due to confounding variable rather than IV, rendering the result meaningless
control
refers to a variable that is held constant or regulated by the researcher (e.g. control group)
external validity
the degree to which a research finding can be generalised: to other settings (ecological, population, historical validity)
ecological validity
the extent to which a finding can be generalised to other settings
population validitiy
the degree to which a finding can be generalised to other groups of people
historical validity
the extent to which findings can be generalised over time
internal validity
if a result was due to the experimental manipulation rather than other factors (such as confounding/ extraneous variables)
mundane realism
how a study mirrors the real world - the research environment is realistic compared to the real world
validity
whether an observed effect (findings) is an accurate/ genuine one
confederate
an individual in a study who is not a real participant and has been instructed how to behave by the investigator
directional hypothesis
states the direction of the predicted difference in the hypothesis (e.g. girls watch 10 hours more week than boys)
non-directional hypothesis
a hypothesis that simply predicts there will be a difference between the two conditions/groups studied (e.g. girls and boys will watch a different amount of tv per week)
pilot study
a trial run of a study (small-scale) to test any aspects of the design, with a view to making improvements
counterbalancing
an experimental technique used to overcome order effects when using a repeated measures design - ensures each condition is tested first/second in equal amounts
experimental design
a set of procedures used to control the influence of factors (such as participant variables) in an experiment
independent groups design
ppts allocated to 2+ groups representing different levels of the IV
matched pairs design
pairs of ppts are matched in terms of key variables such as age or IQ. one member of the pair is allocated to one of the conditions and the second is allocated to the other
order effect
an extraneous variable arising from the order in which conditions are presented in a repeated measures design (e.g. a fatigue effect)
random allocation
allocating ppts to experimental groups/conditions using random techniques (e.g. random number generator)
repeated measures design
each ppt takes part in every condition under test (each level of IV)
field experiment
experiment conducted outside a laboratory (ppts usually unaware) - the IV is still manipulated by experimenter
laboratory experiment
experiment carried out in a controlled setting (e.g. a laboratory)
natural experiment
the experimenter has not manipulated the IV directly - but measures the DV
quasi experiment
studies that are ‘almost’ experiments - the IV is a condition that already exists, experimenter records effect on a DV (e.g. how people age)
demand characteristics
a cue that makes ppts unconsciously aware of the aims of a study or helps ppt work out what the researcher expects to find
investigator effects
aspects of an investigator that encourages/ discourages behaviours from ppts (e.g. attractiveness or views)
single blind design
ppts are not aware of research aims and/or which condition of experiment they are recieving
double blind design
both ppt and person conducting experiment are ‘blind’ to the aims and/or hypotheses