variables

operationalising

how you are going to measure the DV

extraneous variables

any variable other than the IV that might affect the DV

types of extraneous variables

-situational SV

-participant PV

-researcher effect

-demand characteristics DC

examples of situational variables

-temperature of the room

-time of day

-noise levels

-factors in the environment that can affect performance

examples of participant variables

-natural intelligence level

-mood

-anxiety

-health

-tiredness

-any characteristic that is unique to one person

examples of researcher effect

-bias from the researcher towards a certain IV

-non verbal communication

-language tone

-physical appearance of researcher

demand characteristics

p changes behaviour to suit a certain hypothesis, social desirability