Similarity, Answer Copying, and Aberrance

2016 ◽  
pp. 25-46 ◽  
Author(s):  
Cengiz Zopluoglu
Keyword(s):  
Answer Copying

scholarly journals A Derivation of the Optimal Answer-Copying Index and Some Applications

2014 ◽  
Author(s):  
Mauricio Romero ◽  
Alvaro Riascos ◽  
Diego Jara
Keyword(s):  
Answer Copying

scholarly journals An Exploratory Case Study of the Use of Video Digitizing Technology to Detect Answer-Copying on a Paper-and-Pencil Multiple-Choice Test

2013 ◽  
Author(s):  
Carlos Zerpa ◽  
Christina Van Barneveld
Keyword(s):  
Choice Test ◽  
Small Scale ◽  
Test Results ◽  
Multiple Choice Test ◽  
Test Taking ◽  
Exploratory Case Study ◽  
Future Program ◽  
Shed Light ◽  
Answer Copying

In educational testing, answer-copying is considered a behaviour that poses threats to the validity of test scores interpretations, which is a concern when interpreting the test results for the purpose of making changes to curriculum and educational policies. Answer copying involves at least two examinees, one being the source and the other the copier. While different methods have been developed to detect answer-copying using statistical indices, researchers have not yet examined the use of video digitizing technology via a kinematic sanalysis of the data to detect answer-copying during test taking situations. The purpose of this case study was to explore the use of video digitizing technology to detectanswer-copying by measuring examinees’ response time, displacement and velocity from item to item on a test. A sample of two university students volunteered to demonstrate the benefits and challenges of using video digitizing technology to detect answer-copying. While this is a small scale demonstration, the outcome of this study may shed light on whether or not the use of video digitizing technology provide evidence of feasibility and some preliminary reliability in the detection of answer copying.The lesson learned from this study can inform the direction of a future program of research.

Effects of Test Level Discrimination and Difficulty on Answer-Copying Indices

2018 ◽  
Vol 7 (1) ◽  
pp. 32
Author(s):  
Onder Sunbul ◽  
Seha Yormaz
Keyword(s):  
Type I Error ◽  
Error Rates ◽  
Type I ◽  
Test Length ◽  
Power Performance ◽  
Detection Rates ◽  
Power Rate ◽  
Test Level ◽  
Answer Copying ◽  
Better Than

In this study Type I Error and the power rates of ω and GBT (generalized binomial test) indices were investigated for several nominal alpha levels and for 40 and 80-item test lengths with 10,000-examinee sample size under several test level restrictions. As a result, Type I error rates of both indices were found to be below the acceptable nominal alpha levels.  The power study showed that average test difficulty was very effective for power (true detection) rates of indices. Clear patterns were observed for the increase of test difficulty in favor of both ω and GBT power rate. Contrary to expectations; average test discrimination was not as effective as average test difficulty. The results of the interaction effects of item discrimination and difficulty showed that for the cases whose b parameters were lower than 0 with weak discrimination, indices had weak power for both ω and GBT. In addition, for the cases whose b parameter levels were below zero with high discrimination indices, the power performance of both answer-copying indices were very weak. Results for test length showed that with the increase of test length the power rate of both ω and GBT tended to increase. Also, ω performed slightly better than GBT or very close to GBT for 80-item test length however, ω performed better than GBT in terms of power rate for the cases with 40-item test length

Detecting Answer Copying When the Regular Response Process Follows a Known Response Model

2006 ◽  
Vol 31 (3) ◽  
pp. 283-304 ◽  
Author(s):  
Wim J. van der Linden ◽  
Leonardo Sotaridona
Keyword(s):  
Alternative Hypothesis ◽  
Null Distribution ◽  
Response Model ◽  
Response Process ◽  
Nominal Response Model ◽  
The Family ◽  
Multiple Choice Items ◽  
The One ◽  
Maximum Minimum ◽  
Answer Copying

A statistical test for detecting answer copying on multiple-choice items is presented. The test is based on the exact null distribution of the number of random matches between two test takers under the assumption that the response process follows a known response model. The null distribution can easily be generalized to the family of distributions of the number of random matches under the alternative hypothesis of answer copying. It is shown how this information can be used to calculate such features as the maximum, minimum, and expected values of the power function of the test. For the case of the nominal response model, the test is an alternative to the one based on statistic ω. The differences between the two tests are discussed and illustrated using empirical results.

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