Control of Variables Flashcards
types of participant reactivity (extraneous variables)
hawthorne effect
demand characteristics
social desirability bias
types of investigator effects
experimenter bias
interviewer bias
green-spoon effect
define hawthorne effect
when added attention affect participants behaviour - act differently
e.g shy / show off
define demand characteristics
When participants think they have figured out aim and change behaviour to fit aim
seen especially in repeated measures
define social desirability bias
when participants try look good by answering in socially accepting way
define experimenter bias
When experimenters effects the results
e.g body language, facial expressions, way they speak
define interviewer bias
when interviewer effects the responses of the interviewee
define greenspoon effect
interviewer make affirmative noises
e.g mmmmmm
define order effects
bordem
tiredness
practise
Name the type of controls
DSSRC
randomisation
counterbalancing
single blind design
standardisation
double blind design
define randomisation
using chance at every available opportunity
what does randomisation control?
experimenter bias
e.g) experimenter not choosing sample
define counterbalancing
half of participants do condition 1, the other half do condition 2
they then swap
what does counterbalancing control?
order effects
balances the order effects out
define single blind design
use of deception to mislead participants
