experimental method

Cards (13)

what are aims
general statements that describe the purpose of an investigation
what is a hypothesis
a statement that is made at the start of a study and clearly describes the relationship between variables as stated by the theory
types of hypotheses
directional hypothesis
non-directional hypothesis
what is a directional hypothesis
when the researcher makes clear the direction that is anticipated between two conditions or two groups of people
what is a non-directional hypothesis
states that there is a difference of conditions or groups but the nature of the difference is not specified
what is the experimental method
the manipulation of an independent variable to measure the effect on the dependent variable
when do researcher use a directional hypothesis
when a theory or previous research studies suggest a particular outcome
what is an independent variable
the aspect that the researcher changes or manipulates
what is a dependent variable
the variable that is measure by the researcher
what is operationalisation
clearly defining variables in terms of how they can be measured
example of directional hypothesis
people who drink Speedupp become more talkative than people who don't
example of non-directional hypothesis
people who drink Speedupp differ in talkativeness compared with people who don't drink Speedupp
operationalised hypothesis example
after drinking 300ml of Speedup, participants say more words in the next five minutes than participants who drink 300ml of water