Item response theory is based on the following assumptions : I : Unidimensional nature of the test. II : Varying ability level of respondents. Codes :
I and II both
Item Response Theory (IRT), developed by Lord, Rasch, Birnbaum and others, models the probability of a particular response to an item as a function of the person's position on a latent trait (ability, θ) and the item's parameters (difficulty, discrimination, guessing).
Statement I – true: the basic IRT models assume unidimensionality, i.e. a single latent trait accounts for performance on all the items. Together with local independence, this is a core assumption.
Statement II – true: IRT assumes that respondents differ in ability along a continuous latent scale; the item characteristic curve describes how the probability of success rises as ability increases. Without varying ability levels, item difficulty and discrimination could not be estimated.
Hence, the answer is I and II both.
Similar Questions
For detecting errors in teaching-learning process, the appropriate data collection tool will be .......... .
Open-ended questions ..........
(i) Mostly provide qualitative data.
(ii) Provide data in respondent’s own words.
(iii) Provide data based on the pre-defined options provided by the researcher
(iv) Generally get less response
Codes :
Assertion (A) : The ‘diary’ technique enables to collect data about daily activities and experiences of the respondents, recorded by himself.
Reason (R) : The ‘diary’ technique is the most used technique in Delphi research.
Codes :
Identify the odd component from the following :
Compared to speed test, a distinguishing feature of power test is ................... .
The calculation of mental age basically involves :
“Norms are the average performance of standardized sample”. This statement is true for which type of tests ?
(I) Personality test
(II) Aptitude test
(III) Achievement test
Codes :
Which of the following statement/s is/are true about the item analysis ?
(I) It involves qualitative analysis of test items
(II) It improves the validity of the test.
Codes :
Positive affectivity and Negative affectivity schedule is standardized by :
As a measure of item difficulty P = 0.15 would indicate that :
Important Questions from Data Collection Instrument - Teaching
- Which data collection tool is appropriate for the study of job satisfaction of KVK professionals ?
Assertion (A) : Online survey tools such as Survey Monkey and Question Pro have made data collection, analysis and result extraction much easier and simpler.
Reason (R) : Though these tools are being used widely without any doubt in recent time, but social research cannot rely always on the results from an online survey because of their inherent limitations.- Match the items of List – I with the items in List – II and use the correct code to indicate your answer.
List – I (Types of reliability) List – II (Procedure) (a) Stability (i) Administer one test and correlate the items to each other. (b) Equivalence (ii) Administer different tests to the same individuals over a period of time. (c) Equivalence and Stability (iii) Administer the same test to the same individuals over a period of time. (d) Internal consistency (iv) Administer different tests to the same individuals at about the same time.
Codes :
(a) (b) (c) (d) - Which one of the following methods of data collection helps in collecting supplementary information about the informant's personal characteristics ?
- Arrange the following statements depicting questionnaire construction procedure in a sequential order :
(i) Select the question type and decide on question structure
(ii) Organize the questions into a logical order
(iii) Select the best wording for each individual question
(iv) Pretest the questionnaire and revise if necessary.
Select the correct answer from the codes given below :
