This presentation help understand the four scales of measurement

1. Dr. Roma Smart Joseph
Teacher Educator
Lucknow, Uttar Pradesh
India

2. According to Bradfield, “measurement is a
process of assigning symbols to the
dimensions of phenomenon in order to
characterize the status of the phenomenon
as possible.”
Measurement is a process of quantification.
It is more precise than evaluation.
Example: intelligence is quantified in terms
of I.Q.

3. MEASUREMENT
ASSESSMENT
EVALUATION

4. One of the most influential distinction made in
measurement was Steven’s (1946) classification
of scales of measurement.
He made four basic levels or scales of
measurement and commonly referred as:
Nominal scale
Ordinal scale
Interval scale
Ratio scale

6. It is least precise among the four scales of
measurement.
Also called as naming scale (qualitative
classification).
Ex: gender, nationality, language etc.
The classroom observation technique of
measurement is used as nominal scale.

7. It is precise than nominal scale.
It allows rank order (1,2,3), but doesn’t
allow the relative degree of difference
between them.
Units along the scale is unequal in size.
This scale is frequently used in schools for
prize distribution.

8. It is more precise and refined than nominal and
ordinal scale.
It has equal units of measurement.
It doesn’t possess a true zero.
Fahrenheit and centigrade thermometers are
example of this scale.

9. It is most refined among the four scales of
measurement.
It has absolute zero point representing complete
absence of the attribute being measured.
It is used in physical sciences.
It is used in maintaining cumulative records of the
students in schools .

10. romasmart@ymail.com