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WELCOME. Presentation slides can be downloaded from: http://www.rivervalleypri.moe.edu.sg. ?. ?. ?. PSLE. SEMINAR. PSLE T-Score Explained. OUTLINE. PSLE is a placement exam What is the PSLE Aggregate SCORE? Why is T-Score used? Definition & Calculation of T-Score

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Presentation Transcript
slide1

WELCOME

Presentation slides can be downloaded from: http://www.rivervalleypri.moe.edu.sg

slide2

?

?

?

PSLE

SEMINAR

PSLE

T-Score

Explained

slide3

OUTLINE

  • PSLE is a placement exam
  • What is the PSLE Aggregate SCORE?
  • Why is T-Score used?
  • Definition & Calculation of T-Score
  • Questions about T-Score
slide4

PSLE - a placement exam

  • Need to reflect the relative achievement level of pupils within their peers.
  • Places pupils into different courses according to their academic ability
  • Enables posting to secondary schools by merit and as far as possible into a school of their choice.
slide5

What are these scores?

Are they raw scores?

What is PSLE Aggregate Score?

It is a sum of scores.

slide6

The PSLE Aggregate Score

  • incorporates performance of pupils in all 4 subjects
  • allows pupils to be ranked fairly
slide7

NO !

Can raw scores be used?

slide8

Why Not?

  • Different subjects have different levels of difficulty
  • So are the spread of marks from the average mark, i.e. the standard deviation

(spread = standard deviation)

slide9

Narrow

Wide

MEASURE OF

S P R E A D

slide10

H U R R A Y !

I scored 85% in both English and Mother Tongue !

DOLLY

slide11

Her performance in MT is very close to that of other pupils

85%

  • She did much better in EL as compared to other pupils

EL

MT

EL ave

= 60

MT ave

= 80

Dolly scores 85% in both EL and MT

0

100

slide12

Transformed Score or T-Score

A need for standardisation of the raw scores

slide13

EL

85%

85%

ave = 60

ave = 80

50

T-Score

MT

T-Score converts average mark of each subject to a common score of 50 points. It also converts other marks taking into consideration the extent to which they differ from the average and the size of spread of the marks around the average

slide14

What is T-Score?

  • It gives the relative position of a pupil’s performance as compared to the performance of all the other pupils in that subject
  • The raw mark obtained in the exam only shows how good the pupil is in that subject, not how good he is as compared to others
slide15

How is T-Score calculated for each subject?

(X

-

Y)

=

+

T

50

10

Z

where X: pupil’s mark for the subjectY: average mark (mean) scored by all pupils Z: spread of marks around the average mark (standard deviation)

slide16

(50 - 68.0)

T = 50 + 10

14.0

= 37.14

Example:

  • Pupil’s mark (X) in exam = 50.0
  • Average mark (Y) scored by all pupils = 68.0
  • Spread of marks (Z) around the average mark (Y) = 14.0
slide17

How is the Aggregate

Score calculated?

By adding the T-Scores of

the 4 subjects

slide18

Example:

Subject

Total

Mark

T-Score

EL1

200

105

34

CL2

200

152

51

Maths

100

67

53

Science

100

58

47

Aggregate:

185

slide19

Finally,

all pupils are ranked according to their Aggregate Scores

slide20

T-SCORES & GRADES:

Is it possible for a pupil with 3A* and 1A to be ranked lower than another pupil who has only 1A* and 3As?

Yes, it is possible

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