research methods Flashcards
(57 cards)
pseudoscience
Ideas formed without empirical evidence or the use of scientific
methods or principles.
independent variable
The variable for which quantities are manipulated by the researcher, and is assumed to have a direct effect on the
dependent variable.
dependent variable
The variable the researcher measures for changes it may experience due to the effect of the independent variable.
population
The group of people that are the focus
of the research to which findings from
the sample can be generalised to.
sample
A subset of the research population who participate in a study
scientific
Ideas and theories generated through
observation and experiment.
variable
A condition or component of an experiment that can be measured
or manipulated.
experiment
When a cause-and-effect relationship between two variables is measured in a
controlled environment.
controlled experiment
A type of investigation that measures the causal relationship between one
or more independent variables and a dependent variable, whilst controlling
for all other variables.
extraneous variable
Any variable that is not the independent variable, but may cause
an unwanted effect on the dependent variable.
controlled variable
Variables other than the IV that a researcher holds constant (controls) in an investigation, to ensure that changes in the DV are solely due to
changes in the IV.
control group
The group of participants who receive no experimental treatment or
intervention to serve as a baseline for comparison.
experimental group
The group of participants exposed to a manipulated independent variable.
between-subjects design
An experimental design in which individuals are divided into different
groups and complete only one experimental condition.
within-subjects design
An experimental design in which participants complete every
experimental condition.
mixed-method design
An experimental design which combines different elements of
within-subjects and between-subjects
designs.
correlational study
A study in which researchers observe and measure the relationship between
two or more variables without any active control or manipulation.
generalise
Using a sample’s results to make conclusions about the wider research
population.
generalisability
The ability for a sample’s results to be used to make conclusions about the wider research population.
convenience sampling
Sampling readily available members of
the population.
random sampling
Any sampling technique that uses
a procedure to ensure every member of the population has the same chance of being selected.
stratified sampling
A sampling technique that involves selecting people from the population in a way that ensures that its strata (subgroups) are proportionally
represented in the sample.
random allocation
Every member of the sample has an equal chance of being
in the control or experimental group.
participant-related variables
Characteristics of a study’s participants
that may affect its results.