I designed a questionnaire regarding teacher readiness to conduct / perform certain tasks other than teaching in the classroom. One of the items included is the period of service of the teacher. Here is what the item looks like:
Period of service:
less than 1 year (1)
1 - 5 years (2)
6 - 10 years (3)
more than 10 yrs (4)
The left is the code which I used in SPSS. I am confused about which level of measurement should be used in SPSS, ordinal or nominal?