Browsing by Subject "CAT"

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Comparability of scores from cat and paper and pencil implementations of student selection examination to higher education
(2015-05) Ayhan, Ayşe Sayman
The purpose of this study was to investigate the possibility of computerized adaptive testing (CAT) format as an alternative to the paper and pencil (P&P) test of the student selection examination (SSE) in Turkey. The scores obtained from both P&P format of the SSE and CAT through post-hoc simulations were compared using science subtest items. Different test termination rules (fixed length and fixed standard error) and ability estimation methods (EAP and MLE) were used to operate the CAT version of the SSE P&P test. 10, 15 and 25 items were used as fixed length test and standard errors of 0.30, 0.20 and 0.10 were used as fixed standard error thresholds in terms of test termination rules. Results indicated significant correlations between scores from SSE and CAT. The comparisons between results obtained from CAT and P&P tests also revealed that there exists similar ability distributions and significant reduction in the number of items used through CAT. The findings from the research showed that CAT could calculate reliability using fewer items than P&P test. This study suggests that CAT can be an alternative to SSE with comparable scores to P&P format.
Open Access
Effect of high intensity interval training on elite athletes' antioxidant status
(Elsevier Masson, 2013) Ugras, A. F.
Objective: The effects of high intensity interval exercises on antioxidant defense system are not clear. Since there is an evident lack of studies focused on oxidative stress experienced following combat sports and high intensity interval training, we investigated oxidative stress markers (malondialdehyde [MDA], catalase [CAT], glutathione peroxidase [GPX], superoxide dismutase [SOD]) by completing high intensity interval training program (HIITP) and following International Muay Thai Championship (IMTC). Methods: The study was carried out on 21 elite players (15 males and six females) who had regular exercising and training habits. The participants were subjected to a daily 3-hour HIITP during brief training camp (10-day) before IMTC. They were instructed to maintain their normal dietary practices throughout the camp and during the study to take no antioxidant containing vitamin tablets. Results: There was a significant increase in MDA levels and significant decrease in CAT activities of players (P<. 0.05). The differences in SOD and GPX activities were not significant. Conclusion: These results suggested that high intensity interval training and competition could affect the oxidative status of Muay Thai (MT) athletes. © 2012 Elsevier Masson SAS.