Lab experiment =
experiments conducted in a controlled aritfical environment where the IV is manipulated.
Field experiment =
experiments conducted in a natural environment where the IV is manipulated.
Quasi experiment =
uses an IV that is not manipulated by the researcher because it is naturally occurring. (Eg. gender/age)
Independent variable
the variable manipulated by the researcher to observe its effect
Dependent variable =
the variable measured by the researcher to see the effect of the IV.
Experimental design =
how participants are allocated into groups.
Independent measures =
uses two independent groups of participants in each condition.
Repeated measures =
each participant takes part in all conditions of the experiment.
Matched pairs =
participants are purposely matched based on specific variables, then split across conditions.
Extraneous variable =
an unwanted,uncontrolled variable that may influence the dependent variable.
Confounding variable =
the effect of an extraneous variable influencing the DV, making results invalid.
Demand characteristics =
when participants guess the aim of the study and change behaviour.
Investigator effects =
any unwanted interference by the researcher which can effect the outcome of the experiment, this includes researchers expectations, body language and tone.
Randomisation =
using ‘chance’ to reduce the researches influence on the design of the investigation.
Standardisation
giving all participants the same experience of the experiment.
Reliability =
the consistency of research/results.
Validity =
genuiness/accuaracy of what’s being measured.
Internal validity =
to what extent are the effects gueninuly being caused by the IV/ensuring the study measures what its supposed to measure.
External validity =
the extent to which findings can be generalised to other people’s settings
Ecological validity =
the extent to which the reasearch can be applied to real world settings.
External reliability =
the ability of a study to be replicated and achieve the same results.
Internal reliability =
the consistency within a test/measure itself.
Observation =
a research method that consists of watching people and recording what is observed
Observational technique =
when observation forms another part of the research method . Eg. Lab or field.