PSYCHOLOGICAL
RESEARCH
METHODS
,LEVELS OF MEASUREMENT
,Definitions
Descriptive statistics- organising and summarising data
Inferential statistics- using probability to determine how confident we an be th
our conclusions are correct
Variables- the characteristics we want to measure
Value- what numbers the variable can range between
Score- what particular number one individual or group got
, Ratio scale
Features:
• Has an absolute zero value/ score (weight or height)
• Determines whether things are the same or different
• Ranks scores
• Computes averages
• Computes ratios or percentages
Example: (relevant for ratio only)
Emma and Jennifer score 5 and 10, respectively, on a test of
creativity- higher scores indicate greater levels of creativity. Gem
concludes that she is about twice as creative as Emma.
RESEARCH
METHODS
,LEVELS OF MEASUREMENT
,Definitions
Descriptive statistics- organising and summarising data
Inferential statistics- using probability to determine how confident we an be th
our conclusions are correct
Variables- the characteristics we want to measure
Value- what numbers the variable can range between
Score- what particular number one individual or group got
, Ratio scale
Features:
• Has an absolute zero value/ score (weight or height)
• Determines whether things are the same or different
• Ranks scores
• Computes averages
• Computes ratios or percentages
Example: (relevant for ratio only)
Emma and Jennifer score 5 and 10, respectively, on a test of
creativity- higher scores indicate greater levels of creativity. Gem
concludes that she is about twice as creative as Emma.
