Research Methods Flashcards
DDD- Chi squared
Nominal, independent measures
DDD- Mann Whitney U Test
Ordinal, Independent measures
DDD- Sign test
Nominal, Repeated measures/matched pairs
DDD- Wilcoxon
Ordinal, repeated measures/matched pairs
DDD- spearman’s rank
Ordinal, correlation
2 advantages and a disadvantage of brain scans
A- useful for diagnosing brain dissorders
A- can see activity in real time
D- cannot pinpoint exactly area
Definition of cross sectional studies
One group of a population compared with another e.g. young v old
Advantage and 2 disadvantages of cross sectional studies
A- relatively quick in comparison to longitudinal
D- groups my differ in more ways than behaviour researched
D- cohort effects , same age could share same experiences
Concurrent validity definition
Compares current method of measuring with previously validated one. Ps given both measures and scores compared
Predictive validity definition
Whether scores on a test predict what you expect to
Face validity definition
Self report measure looks like what the research intended to measure e.g related and intuitive measurements
Content validity definition
Whether method of measurement measures intended content. Expert calculate
Construct validity definition
Extend measures target construction e.g stress
Define interater reliability
Observational data- two or more observers should produce same data, correlate agreements, total should be >80%
Define test retest
For external. Given test once then again once forgotten and we’re compared by calculating correlation coefficient
Define Split half reliability
Ps given a test then group split and results compared using calculation coefficient
What is the symbol of R in test name
If there is an R observed value should be gReater than critical
If not then less than
How can content analysis be ised
Qualitative data analysed to look fir patterns ( type of word )
The answers compared to see if they give insight into what the majority think
Wht duevtge psychologist use a self selected sample
Less ethical issues as p knows what they are letting themselves in for
Less likely to withdraw and will have an opinion
No reesearcher bias
Why was Spearemans appropriate
Looking for a correllation and data is ordinal
