M2 W6: Psychological Measurement Flashcards
(21 cards)
Psychological measurement is often referred to as ____
Psychometrics
Describes the behaviours and internal processes that make up that construct, along with how it relates to other variables
Psychological construct
Definition of a variable in terms of precisely how it is measured
Operation definition
Participants report on their own thoughts, feelings, and actions
Self-report measures
Participants behaviour is observed and recorded
Behavioural measurements
Using multiple methods or measurements to address the same research questions
Converging operations
What are the levels of measurement (4)
1) Nominal Level
2) Ordinal level
3) Interval level
4) Ratio level
Levels of measurement
Used for categorical variables and involves assigning scores that are category labels
Nominal level
Levels of measurement
__ ___ communicate whether any two individuals are the same or different in terms of the variables being measured
Category labels
Levels of measurement
Involves assigning scores so that they represent the rank order of the individuals
Ordinal level
Levels of measurement
Involves assigning scores so that they represent the precise magnitude of the difference between individuals, but a score of zero does not actually represent the complete absence of the characteristic
Internal level
Levels of measurement
Involves assigning scores in such a way that there is true zero point that represents the complete absence of the quantity
Ratio level
The two general dimensions in evaluating a measurement method.
1) reliability
2) validity
Refers to the consistency of a measure
Reliability
Three types of consistency
1) overtime
2) across items
3) across different researchers
1) Over time - _____
2) Across items - ____
3) Across different researchers - _____
1) Test-retest reliability
2) internal consistency
3) interrater reliability
True or False
The scores obtained when using Test-Retest Reliability should not be consistent across time.
False. Score obtained should be consistent
Extent to which the scores from measure represent the variable they are intended to
Validity