Year 13 Research methods Flashcards
Content analysis strengths + weaknesses
External validity
It can produce both qualitative data and quantitive data
Studied indirectly
Researcher may attribute opinions on the writer that were not intended originally.
Lack of objectivity
Ways of assessing reliability
Test - retest
Inter-observer reliability
Improving reliability
Questionnaires
Interviews must be structured
Observations must be operationlised
Experiments having standardised procedures.
Types of validity
Internal validity
External validity
Temporal validity
Statical testing: Levels of measurement
Nominal data
Ordinal data
Interval data
Type I error
False positive - Reject the null hypothesis and accept the alternative hypothesis
Type II error
False negative - accept the null hypothesis and reject the alternate hypothesis
When to use the sign test
Nominal data
Repeated measures design
When to use Chi squared test
Nominal data
Can look for a difference or correlation
When to use Wilcoxon test
Ordinal data
Repeated measures design
When to use Mann Whitney test
Ordinal data
Independent groups design
When to use related t test
Interval data
Repeated measures design
When to use unrelated t test
Interval data
Independent groups design
Parametric test
When to use spearman’s test
Ordinal data
Correlation
When to use Pearson’s test
Interval data
Correlation
Parametric test
