Scaling Session. Measurement implies “assigning numbers to objects or events…”
Measurement implies “assigning numbers to objects or events…”
Distinguish two levels: we can assign numbers to the response levels for a single question (mild, moderate or severe pain), and we can also assign different numerical weights to each question. Thus, saying ‘No’ to “Can you get out of bed?” might get a higher score than ‘No’ to “Can you run a mile?”
The purpose of scaling is to select appropriate numbers for these two purposes to represent amounts of health.
Where do these numbers come from?
Many variants. For example:
* Half p for that category plus p for category below
A B C D E F
I can use the toilet without assistance yes yes yes yes yes no
I can rise from an armchair yes yes yes yes nono
I can walk one block yes yes yes no no no
I can do the grocery shopping yes yes no no no no
I can run a mile yesno no no no no
score 5 4 3 2 1 0
This generates an ordinal scale in which all items fall on one dimension.