# Statistics & Research Methods (CBSE-NET (UGC) Psychology (Paper-II & Paper-III)): Questions 146 - 150 of 161

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## Passage

A psychometrician wanted to develop a new test of Abstract Thinking. He prepared eighty items, presumably assessing abstract thinking. Each item had five alternatives answers, one of them being correct. The psychometrician carried out item analysis by using item-remainder correlations. Item analysis retained sixty items. To examine internal consistency among the items, inter-item correlations were inspected. Then the split-half reliability coefficient, Kuder - Richardson reliability coefficient, and Cronbach’s alpha coefficient were obtained for the sixty item test. The analysis yielded the Cronbach’s alpha coefficient of 0.90. Since the test was fairly long and the alpha coefficient was also quite high, an attempt was made to develop two short versions of equal length by randomly dividing the test items. The 60 item version was, then, correlated with the already established abstract reasoning test, using N = 500. The correlation between the new and an established test was 0.24, significant at. 01 level.

## Question number: 146 (3 of 5 Based on Passage) Show Passage

» Statistics & Research Methods » Inferential Statistics

Appeared in Year: 2015

MCQ▾

### Question

To obtain inter-item correlations, which one of the following correlation coefficient should be used in the above analysis? (December)

### Choices

Choice (4) Response

a.

Biserial correlation

b.

phi-coefficient

c.

Point biserial correlation

d.

Rank difference correlation

## Question number: 147 (4 of 5 Based on Passage) Show Passage

» Statistics & Research Methods » Inferential Statistics

Appeared in Year: 2015

MCQ▾

### Question

What is the expected Cronbach alpha for the short versions, referred to in the paragraph? (December)

### Choices

Choice (4) Response

a.

0.82

b.

0.67

c.

0.90

d.

0.45

## Question number: 148 (5 of 5 Based on Passage) Show Passage

» Statistics & Research Methods » Inferential Statistics

Appeared in Year: 2015

MCQ▾

### Question

In the above context, which one of the following correlation should be computed to obtain item-remainder correlations? (December)

### Choices

Choice (4) Response

a.

Tetrachoric correlation

b.

Phi-coefficient

c.

Rank difference correlation

d.

Point biserial correlation

## Question number: 149

» Statistics & Research Methods » Basic Descriptive Statistics

Appeared in Year: 2015

Assertion-Reason▾

### Assertion (Ꭺ)

A tree shall appear in same perceived size whether one views it from near or far point. (December)

### Reason (Ꭱ)

The size of retinal image remains invariant.

### Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

b.

Ꭺ is true but Ꭱ is false

c.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

d.

Ꭺ is false but Ꭱ is true

## Question number: 150

» Statistics & Research Methods » Common Statistical Tests in Psychology

Appeared in Year: 2015

Match List-Ⅰ List-Ⅱ▾

### Question

Match List - I with List - II arid select the correct answer by choosing from codes given below:
List-Ⅰ (Name Of The Rating Scale) List-Ⅱ (Related Used Of Scale)

(A)

Individual ranking

(i)

Evaluation method where employ are ranked from best to worst

(B)

Graphic rating scales

(ii)

Evaluator rates actual job related behavior along a continuum.

(C)

Behaviorally anchored rating Scales

(iii)

Evaluator rates employees on classification of some qualities.

(D)

Group order ranking

(iv)

Evaluator rates performance factors on an incremental basis.

### Choices

Choice (4) Response
• (A)
• (B)
• (C)
• (D)

a.

• (iii)
• (iv)
• (ii)
• (i)

b.

• (i)
• (iv)
• (ii)
• (iii)

c.

• (ii)
• (iii)
• (i)
• (iv)

d.

• (iv)
• (i)
• (ii)
• (iii)