# Statistics & Research Methods (CBSE-NET (UGC) Psychology (Paper-II & Paper-III)): Questions 146 - 149 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

### Question

Which one of the following statement would be true in the above context? (December)

### Choices

Choice (4) | Response | |
---|---|---|

a. | Kuder - Richardson reliability coefficient would also be. 90, the split-half reliability coefficient may differ from. 90. | |

b. | Split-half reliability coefficient would also be. 90, but the Kuder - Richardson reliability coefficient may differ from. 90. | |

c. | The correlation between odd and even parts of the test would be. 90. | |

d. | Kuder - Richardson reliability coefficient and split-half reliability coefficient would be. 90. |

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

» Statistics & Research Methods » Inferential Statistics

Appeared in Year: 2015

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

» Statistics & Research Methods » Inferential Statistics

Appeared in Year: 2015

### Question

Which one of the following conclusion can be drawn from the data provided above?

The new Abstract Thinking Test has: (December)

### Choices

Choice (4) | Response | |
---|---|---|

a. | Unsatisfactory concurrent validity | |

b. | Satisfactory convergent validity | |

c. | Satisfactory concurrent validity | |

d. | Satisfactory divergent validity |

## Question number: 149

» Statistics & Research Methods » Basic Descriptive Statistics

Appeared in Year: 2015

### 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 |