Identifying Good Measurement Flashcards
What are self-report measures?
A method of measuring a variable in which people answer questions about themselves in a questionnaire or interview.
What are informant reports?
A persone ho observes or knows the target well responds to a series of questions about the target.
What are observational measures?
A variable measured by recording observable behaviours or physical traces of behaviours.
What are physiological measures?
A variable measured by recording biological data.
What are categorical variables?
A variable whose levels are categories. E.g., gender, hair colour, etc. AKA nominal variables.
What are quantitative variables?
A variable whose values can be recorded as meaningful numbers.
What are the three scales of measurement?
Ordinal, interval, and ratio.
What is an example of an ordinal scale?
A 5-point scale.
What is an example of an interval scale?
Temperature in degrees (no true zero, each number represents equal intervals between levels).
What is an example of a ratio scale?
Weight (has a true zero).
What is reliability?
The consistency of a measure.
What are the three types of reliability?
Test-retest, interrater, and internal.
What is test-retest reliability?
The consistency in results every time a measure is used.
What is interrater reliability?
The degree to which two or more coders or observers agree in their ratings of a set of targets.
What is internal reliability?
In a measuring instrument that contains several items, the consistency in a pattern of answers, no matter how a question is phrased.
