Waop presentation 2016 a basket case
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This document discusses using baskets and verification methods for unproctored testing. It summarizes the basket method, which involves placing items of equal difficulty into baskets and randomly selecting an item from each basket for each candidate. This helps prevent cheating. The document finds the basket method shows high validity when compared to proctored tests and good test-retest reliability. It also finds that using a Glicko scoring method provides small improvements over traditional scoring methods in reliability and more accurate z-scores for candidates.
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如何办理(uvic毕业证书)维多利亚大学毕业证本科学位证书原版一模一样
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留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
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- 1. eelloo.nl A basket case Using baskets and verification in unproctored testing Jozien Silvester Liesbeth van Leeuwen Jelle Geertsma WAOP Presentation 25 november 2016
- 2. eelloo.nl Unproctored testing • Stakes are high in selection • Possibility of cheating • Proctoring not always possible or efficient • Benefits for candidates of unproctored testing: time and place of choice
- 3. eelloo.nl Unproctored testing • Validity proctored /unproctored equal if: • Informing candidates about optimal test conditions • Taking measures to prevent fraud • Items that measure reasoning (fluid) • Time limit • Basket method
- 4. eelloo.nl Basket method • Large item bank • Items of equal difficulty are placed in a basket • Item is randomly picked from basket • Same number of baskets for every candidate • Four subtests: Figure series, Analogies, Diagrams, Number series
- 5. eelloo.nl Benefits of basket method • Easy calculation • Easy monitoring, maintaining, extension • Easy retesting (system remembers which items were already administered) • Prevention of item leakage
- 6. eelloo.nl Validity • High correlation with proctored extended test (.75) • Test-retest correlation (.77) • About 8% scores lower than expected, possible cheaters
- 8. eelloo.nl Basket monitoring • Some items with equal difficulty are more equal than others Basket Item Difficulty (n) Difference Average 1017 Hcyf106b 0.66 (287) 0.10 0.68 Hcyf106c 0.65 (266) HCYF01b 0.74 (294) 1018 HCYF112 0.62 (409) 0.02 0.63 HCYF112b 0.64 (438)
- 9. eelloo.nl Difference in p-value • Even if items are carefully balanced, there will still be differences, although they may be small • For most candidates this will average • Some will have all the ‘easy’ or all the ‘difficult’ items • Effect on reliability and score • Comparison of correction methods on two measures
- 10. eelloo.nl Score calculation improvement - reliabilities (split half) Education level N CTT IRT1pl IRT2pl Elo Glicko MBO (Vocational) 743 0.85 0.80 0.81 0.79 0.86 HBO (Bachelor) 1397 0.82 0.82 0.83 0.79 0.85 WO (Master) 706 0.80 0.76 0.77 0.74 0.81 • Glicko has best performance • CTT has good results as well
- 11. eelloo.nl Effects Glicko on z-score Item difficulty group regular score Glicko score z-score
- 12. eelloo.nl Concluding remarks • Valid unproctored test possible with basket method • Glicko shows slight improvement in score calculation, but CTT also works well
Editor's Notes
- Measures are: Controletest dreigen met Vragen vooral op fluid, opzoeken op internet heeft geen zin Verification test Question type reasoning rather than knowledge
- Testhelften Acap