SPRING Power ethics and research design Flashcards
what is power
way of ensuring that the experiment is likely to find the effect we are looking for
avoid type 2 errors - increase chance of finding an effect if there is one
what is power related to
effect size
no participants
significance criterion
how is effect size related to power
large effect = greater power
how is no. participants related to power
more pps = more power
more likely to identify an effect than if too small or no actual effect
how is sig criteria (p/alpha) related to power
larger p = more power
likelihood that the results are due to chance
means being more conservative
also depends on if one or two tailed
what is acceptable for power
0.8+
80% of finding effect if there is one (20% type 2)
es criteria for cohens d/n2
comparing two means/ANOVA
large = 0.8, med = 0.5, small = 0.2
es criteria for pearsons r/omega
correlation/association
large = 0.5 , med = 0.3 , small = 0.1
ed criteria for cohens f2
multiple regression
large = 0.35, med = 0.15, small=0.02
research process
problem - hyp - design - measure - collect - analyise - generalise - prob
3 BPS ethics policies
code of conduct
human research ethics
guidelines for internet mediated research
BPS code of conduct
respect
responsibility
competence
integrity
BPS respect
general respect
confidentiality
informed consent
right to withdraw
BPS responsibility
protection of pps
debreif
BPS competence
measure what want to measure
BPS human research first principles
flexible to demands respect autonomy, privacy anf dignity of individuals and communities scientific integrity social responsibility max benefit and min harm
data protection act DPA
1- data obtained and processed fairly and lawfully
2-obtained for specific purpose and not in manner incompatible with prpose
3- adequate, relevant and not excessive
4- processed in accordance with pps rights
5- kept safe from loss or destruction
6- not transferred outside europe unless adequate protection
when might the DPA principles be exempt
if personal data not processed to support measures/decisions with respect to specific individuals (anyone affeceted by the research)
if data is not processed in a way to cause damage/distress to a subject
what may occur if principles are exempt
data can be processed alternative to original means
data can be held indefinitely
no right for subject to access data
who gives ethics approval if adults, TD children, impaired not in NHS/social or risk intrusive/invasive neuroimaging
school ethics and university committee
who gives ethics approval if pps from NHS/social services or with mild intellectual difficulties
NHS/uni committee
time for school ethics committee
15 days
time for uni committee
committe meetings
time for NHS
3+ months
what must you do for child pps
get parental consent if
