# Research Methods and Statistics [GATE (Graduate Aptitude Test in Engineering) Psychology]: Questions 252 - 255 of 320

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### Passage

A psychologist wanted to develop an achievement test in chemistry for SSC students of central schools. For this purpose, he wrote 110 items having multiple-choice format. He administered this draft version to a sample of 300 subjects. Item analysis was carried out by computing item-reminder correlations. The item analysis retained 80 items. The 80 items version was administered to a fresh sample of 400 subjects which yielded a mean of 40.00 alpha and standard deviation of 8.00. the scores were found to be normally distributed. Cornbach alpha for 80 item version was found to be 0.94. The psychologist also computed odd-even reliability and Kuder-Richardson (K-R) reliability for this version. On this version, one of the subjects Manas, had a score of 32. Since the 80 item version was considered long for administration, two forms, form A and form B were prepared by randomly assigning 40 items to each form.

## Question 252 (1 of 1 Based on Passage)

Research Methods and Statistics
Partial Correlation

Appeared in Year: 2019 (UGC)

### Question

MCQ▾

For computing item-remainder correlations, which one of the correlations would be suitable?

### Choices

Choice (4)Response

a.

Phi-coefficient

b.

Point-biserial correlation

c.

tra choric correlation

d.

Contingency coefficient

## Question 253

Research Methods and Statistics
Experimental

Appeared in Year: 2019 (UGC)

### Question

MCQ▾

While conducting an experiment, the researcher manipulates the independent variable within a pre-decided range. Which of the following describes this type of research?

### Choices

Choice (4)Response

a.

Fixed effect model

b.

Quasi-experiment

c.

Mixed-method model

d.

Random-effect model

## Question 254

Research Methods and Statistics
Correlation

Appeared in Year: 2019 (UGC)

### Question

Assertion-Reason▾

### Assertion(Ꭺ)

According to classical theory of test scores, total variance is equal to true variance plus error variance.

### Reason(Ꭱ)

Classical theory of test scores assumes significant but low positive correlation between true scores and error scores.

### Choices

Choice (4)Response

a.

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

b.

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

c.

Ꭺ is true but Ꭱ is false

d.

Ꭺ is false but Ꭱ is true

## Question 255

Research Methods and Statistics
Focus Groups Discussions

Appeared in Year: 2019 (UGC)

### Question

Assertion-Reason▾

### Assertion(Ꭺ)

Focus group involves unstructured interview

### Reason(Ꭱ)

Focus group involves interaction among participants moderated by the researcher, as a source of data.

### 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 false

d.

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

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