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Reliability 19.08.2019
 Reliability Composition

п»їReliability

It means the level to which a test can be consistent and dependable.

It is concerned with the uniformity of responses from moment to moment.

Yet , it may not regularly be valid.

Techniques in Testing the Reliability of Assessment Strategies or MEMORY I. Test-retest Method

Precisely the same test is definitely administered twice to the same group of scholar and the correlation coefficient is determined. Disadvantages:

1 . When the period interval is short, the respondents might recall their very own previous answers resulting to substantial correlation pourcentage or CC.

2 . If the time period is very long, the students might forget or perhaps unlearn their particular responses resulting to a low relationship coefficient from the test.

a few. Environmental condition such as sound, temperature, light etc . may well affect the pourcentage correlation.

Spearman rank correlation coefficient or Spearman rho is used to measure the relationship between the first and second administered evaluation given.

Where = Spearman rho,

D = Difference of 1st and 2nd test out ranks

N sama dengan Number of cases

College students

X

Y

1

12-15

16

6th

4

a couple of

4

a couple of

16

15

5

your five

0

zero

3

doze

11

on the lookout for. 5

being unfaithful

. 5

zero. 25

four

12

12

9. your five

8

1 ) 5

4. 5

five

20

nineteen

1

one particular

0

zero

8. 75

(moderate relationship)

Interpretation of Correlation Worth

0

no correlation

0. 01 -- 0. 20

negligible correlation

0. 21 years old - 0. 40

low or minor correlation

zero. 41 - 0. seventy

moderate relationship

0. 71 - 0. 90

excessive correlation

0. 91 -- 0. 99

very high relationship

II. Parallel or Comparative Method

The tests are administered into a group of college students and the paired observation is usually correlated. To construct it, the contents, types of evaluation, difficulty and instructions of administered testing should be related but not similar.

Pearson product-moment correlation pourcentage is used to determine the correlation from this method.

Exactly where = Pearson product instant

X = 1st check administered & Y= next test implemented

Student

one particular

20

20

400

4 hundred

400

2

16

seventeen

256...

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