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On the Difficulty of Designing Good Classifiers

Michelangelo Grigni, Vincent Mirelli, Christos H. Papadimitriou
2000 SIAM journal on computing (Print)  
Our proof uses a simple connection between this problem and graph coloring, and uses recent results of F urer on the inapproximability of the chromatic number.  ...  We also study the problem of designing a classi er with a single inequality that involves as few variables as possible, and point out certain aspects of the di culty of this problem.  ...  that separates W from B (in other words, the optimum classifying tree has just one internal node).  ... 
doi:10.1137/s009753979630814x fatcat:b6cmmmjrnnba5isggx45igdrtm

On the difficulty of designing good classifiers [chapter]

Michelangelo Grigni, Vincent Mirelli, Christos H. Papadimitriou
1996 Lecture Notes in Computer Science  
We consider the problem of designing a near-optimal linear decision tree to classify two given point sets B and W in n .  ...  Our proof uses a simple connection between this problem and graph coloring, and uses the result of Feige and Kilian on the inapproximability of the chromatic number.  ...  We wish to thank Mihalis Yannakakis for an interesting discussion on this problem.  ... 
doi:10.1007/3-540-61332-3_161 fatcat:ycr7nx2wkjextmoyw3uj36z2tq

An Empirical Analysis of Action Map in Learning Classifier Systems

2018 SICE Journal of Control Measurement and System Integration  
An action map is one of the most fundamental options in designing a learning classifier system (LCS), which defines how LCSs cover a state action space in a problem.  ...  From the analysis on a benchmark classification problem, we identify a fact that an adequate action map can be determined depending on a type of problem difficulty such as class imbalance, more generally  ...  , since the evolution of the best action map acts on identifying the good classifiers.  ... 
doi:10.9746/jcmsi.11.239 fatcat:y4hnbkw34jaazlowfa22oltjta

Assessment and Evaluation of Hybrid Education for Mechanical Engineering by Items Analysis of Summative Examination on Firefighting Systems during Covid-19 Pandemic

طارق عادل منیر, عبد الرحمن مسعد الشاعر
2020 دراسات فى التعلیم الجامعى  
Figures 9, and 10 classify the Items on basis of DIFI, and on basis of DI, respectively.  ...  Meanwhile items 2, 3, 7, 14, 15, 16, 17 lied in the margin of 0.15-0.25 and classified as good items.  ... 
doi:10.21608/deu.2020.159536 fatcat:nqvpwqrlgfg5bkz6dxco4qp6hi

Development and Validation of Higher Order Thinking Skills Based Instrument on Reaction Rate Subject

Nevia Pradani, State University of Malang, Suharti Suharti, Hayuni Retno Widarti
2021 JPP (Jurnal Pendidikan dan Pembelajaran)  
In terms of item difficulty, 10 items were classified as moderate, 1 item was classified as easy, and 4 items were classified as difficult.  ...  This development aims to produce a product in the form of a HOTS-based assessment test on reaction rate. The development was done according to the ADDIE development model.  ...  Difficulty Level of Problem Items and Effectiveness of HOTS-Based Assessment Test Distractors The level of difficulty of the items was determined based on the difficulty index formula and then categorized  ... 
doi:10.17977/um047v28i22021p052 fatcat:x7ue5hbqozelpk6bpzexnysami

A Multi-Cue Integrated Adaboost Based Target Tracking Method

Longkui Jiang, Yuru Wang
2017 Innovative Computing Information and Control Express Letters, Part B: Applications  
In detail, an on-line updated Adaboost classifier is designed to overcome the limitation of single classifier in tracking accuracy and robustness.  ...  And the classification is resolved by designing an adaptive classifier.  ...  In the visual tracking problem, how to design a good tracking method so as to search for the target region is a key problem. In this paper, we will make major research on the tracking algorithm.  ... 
doi:10.24507/icicelb.08.03.609 fatcat:plr2bbrsfzehjnjpzpor5t676q

Developing Item Analysis of Teacher–Made Test for Summative Assessment of Seventh Grade of SMPN 8 Komodo in Academic Year 2020/2021

Aloysia Moto, Lailatul Musyarofah, ani Sulam Taufik
2022 Budapest International Research and Critics Institute (BIRCI-Journal)  
Item analysis of a test designed to resemble the tests was the focus of this research. This category of good test evaluated a test's validity, reliability, index difficulty, and discrimination index.  ...  Then, in the category 'Enough', there were 12 items (30%). On the other hand, there were 15 items (37.5%) were classified into 'Good' items.  ... 
doi:10.33258/birci.v5i1.4237 fatcat:wxjkmbvhp5dxdeipwvbcrz3u6q

Difficulty and discrimination indices of sample of typical multiple choice questions administered to students at different levels showed atypical values

2018 International Journal of ChemTech Research  
The difficulty levels were classified based on Bloom's taxonomy of cognitive processes dimension.  ...  The discrimination indices were classified on a spectrum from poor to fair to good with having a template specifically designed to easily settle the MCQs at its corresponding cells.  ...  Acknowledgments: The authors would like to thank coworkers for supporting research work. Study Funding: None  ... 
doi:10.20902/ijctr.2018.110538 fatcat:vubj6d76bzevlh7326hjtt4czq

Exploring programming assessment instruments

Judy Sheard, Raymond Lister, Anne Philpott, Geoff Warburton, Simon, Angela Carbone, Donald Chinn, Mikko-Jussi Laakso, Tony Clear, Michael de Raadt, Daryl D'Souza, James Harland
2011 Proceedings of the seventh international workshop on Computing education research - ICER '11  
We describe the process of developing the scheme, explain its categories, and present a taste of the results of a pilot analysis of a set of CS1 exam papers.  ...  This study is part of a project that aims to investigate the nature and composition of formal examination instruments used in the summative assessment of introductory programming students, and the pedagogical  ...  required 73% fair to good Style of question 90% excellent Open/closed 60% fair to good Cultural references 15% poor Degree of difficulty 43% fair to good *Explicitness 31% poor  ... 
doi:10.1145/2016911.2016920 dblp:conf/icer/SheardSCCLCRDHLPW11 fatcat:mg6ghib675cqrdmephbakf6ppe


Aan Yuliyanto, Turmudi Turmudi, Ernawulan Syaodih, Arie Dharmawan, Cahya Karisma Pertiwi, Idat Muqodas, Dadan Rusdiana Saputra
2021 MaPan: Jurnal Matematika dan Pembelajaran  
The discrimination power of the questions is very good to discriminate the skills of students who are classified as high and low.  ...  The difficulty level of the three items is moderate, so that belonging is not too difficult or easy.  ...  , the proportion of difficult levels of difficulty dominates on 8 items, and only 3 items are classified as moderate, and only 1 out of 8 item which has a good level of difficulty (Astuti, Waluya, & Asikin  ... 
doi:10.24252/mapan.2021v9n1a5 fatcat:qybbvxgnizandabjggd2vzmnrq


Luqman Luqman
2020 English Language Teaching for EFL Learners  
The result showed that, on average 58.04 % of all respondents using cognitive learning strategy, and 70 % or 21 of the 30 respondents used the practice to overcome the difficulties speaking.  ...  The analysis with the formula t test showed that, applying the cognitive learning strategy had significant positive impact on developing the learners' ability to speak English.  ...  The table 9 showed that, none of the students can be classified as excellent and very good score, based on fluency illustrated that 2 (6.67%) students got very good score, 7 (23.33 %) students got good  ... 
doi:10.24252/elties.v2i1.11422 fatcat:x33mghe4m5fmrktuqbrcaygtw4

Development of Pisa 2015 Based Chemical Literacy Assessment Instrument For High School Students

Fika Tiara, Oktavia Sulistina
2021 J-PEK (Jurnal Pembelajaran Kimia)  
The discrimination index obtained was five items ranked as sufficiently good and 15 items categorised as good, while five items classified as easy item, 14 moderate items, and one difficult item, all distractors  ...  An empirical validity test was used to obtain the level of validity, reliability, discrimination index, difficulty level, and effectiveness of distractors of the items developed in the instrument.  ...  The item difficulty analysis results show that five, 14, and one item are classified as easy, moderate, and difficult, respectively. All of those items also have high functioning distractors.  ... 
doi:10.17977/um026v6i12021p026 fatcat:zgv33nldp5gstgcaeyz7jed5ly

Development of Quizizz Application-Based Test to Measure Science Process Skills of High School Students on Biodiversity Materials

Dian Pangestuti, Dewi Febriyana, Isna Robiatul Adhawiyah, Rifqi Tiara Febriyanti, Setiyo Prajoko
2021 Indonesian Journal of Biology Education  
The students' science process skills are also classified as good, with 76.22 in the high category.  ...  Quantitative data analysis was carried out based on the internal characteristics of the test, such as validity, reliability, level of difficulty, and discriminatory power.  ...  Pangestuti, Febriyana, Adhawiyah, Febriyanti, Prajoko Indonesian Journal of Biology Education Vol. 4, No. 1, 2021 | 39  ... 
doi:10.31002/ijobe.v4i1.4125 fatcat:bwqrxmbohbc3hphis7anmkfynm

The Ability of Indonesian EFL University Students in Writing an Explanation Text

Yanpitherszon Liunokas
2020 Ideas  
To analyze the data, the researcher focused on evaluating the students' writing in five criteria. The result of the research shows that the mean score of the test is 6.86.  ...  In collecting data, the researcher asked the students to write an argumentative essay by choosing one of the given topics.  ...  The data shows that 8 students (27%) are classified into very good, 9 students (30%) are classified into good, 7 students (23%) are classified into average, and 6 students (20%) are classified into poor  ... 
doi:10.24256/ideas.v8i2.1692 fatcat:dmdjs5de4naq3p5bllcnx2jh6q

Dynamic Difficulty Adjustment through a Learning Analytics Model in a Casual Serious Game for Computer Programming Learning

Adilson Vahldick, Antonio Jose Mendes, Maria Jose Marcelino
2017 EAI Endorsed Transactions on Serious Games  
For instance, teachers can use that information to give personalized attention in classes and the game can use it to provide challenges of the "right" difficulty.  ...  This paper proposes a model to identify the students' progress considering their performance in programming tasks.  ...  We also want to thank the students that played the game and their teachers that allowed us to try it with them.  ... 
doi:10.4108/eai.27-12-2017.153509 fatcat:5najpn6herdxzi336553ob2eym
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