RATING SCALE- Pratyusha Ranjan Sahoo.pptx

Rating means measuring an attribute of objects or persons by judgement in a continuum. For e.g. school marks or grades, performance appraisal, rating of an employee in an organization.
This presentation is an attempt to discuss about rating scales, its use, advantage and disadvantages etc.

1. RATING SCALE Presented By- Pratyusha Ranjan Sahoo PhD Research Scholar Regional Institute of Education (NCERT), Bhubaneswar 1

2. Contents Rating Rating Scale Definitions Characteristics Types Uses Advantages Disadvantages Conclusion. 2

3. Rating Rating means measuring an attribute of objects or persons by judgement in a continuum. For e.g. school marks or grades, performance appraisal, rating of an employee in an organization. 3

4. Rating scale Rating scales involves qualitative description of a limited number of aspects of a thing or traits of a person. When we use rating scale we judge an object in absolute terms against some specified criteria . Rating scale could be of i . 3- Point scale ii. 5- Point scale iii. 7- Point scale. 4

5. 3- Point Scale Fig.1 5 Fig.2

6. 5- Point Scale 6 Fig.3

7. 7- Point Scale 7 Fig.4 Fig.4

8. Definitions According to A.S. Barr and others, Rating is a term applied to expression of opinion or judgement regarding some situation, object or character. According to Rugh Strang , “ Rating is in essence directed observation .” According to Garrett , the Rating scale is a device for obtaining judgements of degree to which an individual possesses certain behavior traits and attributes not readily detectable by objective tests. 8

9. Characteristics Rating scales are value judgements about attributes of one person by another person. These scales are most commonly used tools to carry out structural observation . Rating scales are generally developed to make quantitative judgements about qualitative attributes. Rating scale provide more flexibility to judge the level of performance or presence of attribute among subjects. 9

10. Guilford (1954 ) identified that a rating scale must have following basic characteristics. 1. Clarity 2. Relevance 3. Variety 4. Objectivity 5. Uniqueness 10

11. Types Rating scales are also of various types. Some of their main types are as follows. Numerical Scale Descriptive Scale Rank order scale Graphic Scale Percentage of Group Scale Paired Comparison scales Forced Choice Scales Rating by cumulative points. 11

12. Numerical Scale In this type, scores are assigned to each trait. 12 Fig.5

13. Descriptive Scale In such scale, the trait described in words is to be tick marked. 13 Fig. 6

14. Rank Order Scale In this type, the pupil is placed at the rank according to their talents. 14 Fig.7

15. Graphic Scale Graphic scale is also known as behavioral statement scale. Similar to descriptive scale. 15 Fig.8

16. Percentage of Group Scale In this type, a person is asked to tell the percentage of a trait possessed by a group on the basis of which his/her rating is done. 16 Fig.9

17. Paired Comparison Scales In this type, a person or product or item is examined by comparing with other items having similar criterion. 17 Fig. 10

18. Forced Choice Scales In this method, the rater is forced to choose descrptive statements of equal worth. Statements are chosen from both sides– favourable and unfavourable. 18 Fig. 11

19. Rating by Cumulative Points In this type, scores are given after assessing a person’s traits. On the basis of cumulative of the obtained scores some decision is taken about a person. 19 Fig. 12

20. Uses Rating scales are used for evaluating Skills Product outcome Activities Interest Attitude of a person Characteristic features. 20

21. Advantages Records qualitative and quantitative judgments about observed performance. Evaluate products such as typed letter, responses of demonstration, sample of diagram, charts etc. Help teachers to rate students periodically on various characteristics such as punctuality, honesty, cheerfulness and other personal traits. Adaptable and flexible. Used within a large number of students. Helps in promoting and appointing the persons. Helps the students at the time of admission. Motivates the students or pupils to know their shortcomings. 21

22. Disadvantages It is difficult to fix up rating about many aspects of an individual or item or organization. Lack of uniformity with which terms are interpreted by the evaluator. Common sources of errors in rating scales, that affect the validity of a rater, they are : 1. Ambiguity. 2. Attitude of the rater 3. Personality of the rater; Halo effect; personal bias; logical errors 4.Opportunity for adequate observation. 22

23. Conclusion Rating scale is an important step of evaluation and assessment of any person or item or organization. It provide complete information to compare, differentiate and select the best. 23

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