Measurement Flashcards
Measurement
Assignment of scores to individuals so that the scores represent some characteristic of the individuals
Psychometrics
General definition of measurement in psychology
Conceptual definition
Psychological construct describes the behaviours and internal processes that up that construct, along with how it relates to other variables
Operational Definition
Definition of a variable in terms of precisely how is is to be measured
Self report measures
Are those in which participants report their own thoughts, feelings, and actions
Behavioural measures
Are those in which some other aspect of participants behaviour is observed and recorded
Physiological measures
Measuring of physiological processes like heart rate, respiratory rate
Converging Operations
Multiple operational definitions coming together
Levels of measurement
There are 4 of them
Nominal
Ordinal
Interval
Ratio
Nominal Level
Measurement is used for categorical variables and involves assigning scores that are category labels
The measurement process
Constructs, definitions, measures
Levels of variables
Nominal
Ordinal
Interval
Ratio
What is German mathematician carl Friedrich gauss say
- Knowledge and Chance
- Chance “the enemy of all knowledge, overcome”
Louis Agassiz
zoologist: Classify humans by moral + physical traits
Measurement
Giving numerical value to some phenomenon
“Constructs”
Measure tendencies over time that are not directly observable. can be complex, can consist of personality
Qualitative meaurements
Example of constructs
Extraversion = outgoing, enjoy social interactions