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# WELCOME - PowerPoint PPT Presentation

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

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PSLE

SEMINAR

PSLE

T-Score

Explained

• PSLE is a placement exam

• What is the PSLE Aggregate SCORE?

• Why is T-Score used?

• Definition & Calculation of T-Score

• 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.

Are they raw scores?

What is PSLE Aggregate Score?

It is a sum of scores.

• incorporates performance of pupils in all 4 subjects

• allows pupils to be ranked fairly

Can raw scores be used?

• Different subjects have different levels of difficulty

• So are the spread of marks from the average mark, i.e. the standard deviation

Wide

MEASURE OF

S P R E A D

I scored 85% in both English and Mother Tongue !

DOLLY

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

A need for standardisation of the raw scores

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

• 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

(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)

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

Score calculated?

the 4 subjects

Subject

Total

Mark

T-Score

EL1

200

105

34

CL2

200

152

51

Maths

100

67

53

Science

100

58

47

Aggregate:

185

all pupils are ranked according to their Aggregate Scores

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