Assessment week 3 Flashcards
What are the four fundamental levels of measurement scales used to capture data using surveys and questionnaires?
- Nominal
- Ordinal
- Interval
- Ratio
What is an example of a nominal measurement scale?
- Named variables
- No qualitative value or order
- No mode or median
What is an example of an ordinal measurement scale?
- Named + ordered variables
- a list that can be placed in “first, second, third…” order
- a Likert scale; used to represent non-mathematical ideas like frequency, satisfaction, degree of pain
- in a marathon you might have first, second and third place. But if you don’t know the exact finishing times, you don’t know what the interval between first and second, or second and third is
What is an example of an interval measurement scale?
- Named + ordered + proportionate interval between variables
- temperature, time
What is an example of a ratio measurement scale?
- Named + ordered + proportionate interval between variables + can accommodate absolute zero
- Equidistant difference between variables
- weight, height, income
What is a sample in assessment?
Group selected
What is a population in assessment?
Larger group of interest
What are the three sampling methods?
- Simple random
- Stratified
- Cluster
Which sampling method gives everyone in the population an equal chance of selection?
Simple random
Which sampling method matches key demographics of population?
Stratified
Which sampling method identifies existing groups (e.g., schools, clinics, race) and randomly samples from within those groups?
Cluster
What criteria determine the relevance of a normative sample for assessing children/adolescents?
- Is the sample representative of population you want to generalize to?
- Does the sample contain enough cases (around 300)?
- Is the sample appropriately subdivided?
- How old is the normative sample?
What is a single value that attempts to describe a set of data by identifying the central position within that set of data?
Central tendency
Which measure of central tendency is equal to the sum of all the values in the data set divided by the number of values in the data set?
The mean
Which measure of central tendency is the middle score for a data set that has been arranged in order of magnitude, and which divides the data in half?
The median
