Research Methods and Statistics [GATE (Graduate Aptitude Test in Engineering) Psychology]: Questions 150 - 153 of 320

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Question 150

Research Methods and Statistics
ANOVA [One-Way, Factorial]

Appeared in Year: 2017 (UGC)

Question

MCQ▾

A group of 25 subjects were tested on reaction time under three conditions-low stressful, moderately stressful, and highly stressful. The data were analyzed by suitable ANOVA. What would be the degrees of freedom for ‘stressfulness X subjects’ interaction? (January)

Choices

Choice (4)Response

a.

24

b.

3

c.

2

d.

48

Question 151

Research Methods and Statistics
Assumptions

Appeared in Year: 2017 (UGC)

Question

Assertion-Reason▾

Assertion(Ꭺ)

Second order factors can be obtained from promax rotated first-order factors (Paper 3 January)

Reason(Ꭱ)

Promax rotation is a method of oblique rotation

Choices

Choice (4)Response

a.

Ꭺ is false but Ꭱ is true

b.

Ꭺ is true but Ꭱ is false

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Both Ꭺ and Ꭱ are false

Passage

Read the following paragraph and answer the five questions which follow:

A researcher working in the area of human intelligence wanted to develop a new verbal test of intelligence. For this purpose, he wrote 200 objective multiple-choice items. Each item had four alternatives, one of which was right and the three remaining ones were wrong. He administered this initial version to a sample of 400 subjects. Using P27 and P73 as the cut-off points, he obtained two groups – Low Scoring and high scoring respectively. The item difficulty index and the item discrimination index were computed for 200 items. To assess whether each item significantly discriminates between Low scoring and High scoring groups, appropriate statistical significance tests were also employed. This item analysis process retained 150 items. The final version of 150 items was administered to a fresh sample of 750 subjects. The appropriate measures of internal consistency reliability were obtained. The test norms were developed using normalized T scores (mean = 100, SD = 20) and the Wechsler type deviation IQ scores. To assess the dimensionality of verbal intelligence, the researcher also carried out the factor analysis of item scores.

Question 152 (1 of 1 Based on Passage)

Research Methods and Statistics
Measures of Central Tendency and Dispersion

Appeared in Year: 2017 (UGC)

Question

MCQ▾

Which one of the following test of statistical significance can be employed in the above study to evaluate whether item significantly discriminates between the Low scoring and High scoring groups?

Choices

Choice (4)Response

a.

Chi-square

b.

Point-biserial correlation

c.

t test

d.

Biserial correlation

Passage

Read the following paragraph and answer the five questions which follow:

A researcher working in the area of human intelligence wanted to develop a new verbal test of intelligence. For this purpose, he wrote 200 objective multiple-choice items. Each item had four alternatives, one of which was right and the three remaining ones were wrong. He administered this initial version to a sample of 400 subjects. Using P27 and P73 as the cut-off points, he obtained two groups – Low Scoring and high scoring respectively. The item difficulty index and the item discrimination index were computed for 200 items. To assess whether each item significantly discriminates between Low scoring and High scoring groups, appropriate statistical significance tests were also employed. This item analysis process retained 150 items. The final version of 150 items was administered to a fresh sample of 750 subjects. The appropriate measures of internal consistency reliability were obtained. The test norms were developed using normalized T scores (mean = 100, SD = 20) and the Wechsler type deviation IQ scores. To assess the dimensionality of verbal intelligence, the researcher also carried out the factor analysis of item scores.

Question 153 (1 of 3 Based on Passage)

Research Methods and Statistics
Assumptions

Appeared in Year: 2017 (UGC)

Question

MCQ▾

In the above study, which type of correlations can be employed to carry out the factor analysis of the test items? (January)

Choices

Choice (4)Response

a.

Phi coefficients

b.

Biserial correlations

c.

Rank order correlations

d.

Point biserial Correlations

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