Filters








102,835 Hits in 4.1 sec

The difficulty of optimum index selection

Douglas Comer
1978 ACM Transactions on Database Systems  
One algorithm to make an optimum index selection requires 2 steps in the worst case, where k is the number of attributes in the file.  ...  The problem of selecting attributes over which to index has been studied in the context of various storage structures and access assumptions.  ...  In situations where an approximation algorithm produced a good (but not optimum) index selection, it could be used more often to keep the file close to optimum.  ... 
doi:10.1145/320289.320296 fatcat:l52mayyfnff3pdzsdwktyjmqc4

Selecting Optimum Management Practicesin Pre-construction Phase Considering Project Characteristics

Hee-Sung Cha, Ki-Hyun Kim, Young-Jin Ko
2012 Journal of Construction Engineering and Project Management  
characteristic to the performance was drawn by performance difficulty.  ...  In addition, in order to predict the results reflecting the project characteristic of performance management factor un-improvable by the operator in the initial stage of construction, the effect of project  ...  This paper was originally published as the conference paper in the ICCEPM 2011 and awarded as one of the best papers.  ... 
doi:10.6106/jcepm.2012.2.1.001 fatcat:otcjwvvq5naotg5kjfbwk2sety

Assessing the Quality of MCQs in the Final Examination of UUM Foundation Students

Nurul Syazanabinti Hishamuddin Et.al
2021 Turkish Journal of Computer and Mathematics Education  
The aim of this study is to assess the quality of MCQs of final exam questions of foundation students by using the Difficulty Index and Discriminant Index.  ...  The results of this study show that it is important to assess the quality of items in the assessment as it is able to change the selection of items in the assessment.  ...  While the item that have optimum, easy and very easy difficulty index are unacceptable although it is moderate or low discrimination index.  ... 
doi:10.17762/turcomat.v12i3.1221 fatcat:rz3kze6nvzf33hvfwbbkcgqa7a

Selection based on distances from ideotype

C.G.P. Carvalho, C.D. Cruz, J.M.S. Viana, D.J.H. Silva
2002 Crop Breeding and Applied Biotechnology  
They took into consideration the existence of an optimum range for each trait, the difference in scale of the measurements and the relative importance of the traits.  ...  Two selection methods based on distance from ideotype using selection index and principal components are proposed.  ...  ACKNOWLEDGEMENTS The authors wish to acknowledge the CAPES for the financial support.  ... 
doi:10.12702/1984-7033.v02n02a02 fatcat:rpn5swbjhzamhcjsbpuybq2dou

Itemized Analysis of Questions of Multiple Choice Question (MCQ) Exam

Dr. Kartik A Patel, Dr. Neeraj R Mahajan
2012 International Journal of Scientific Research  
MCQ items having optimum Difficulty Index and Excellent Discrimination should be regarded as best framed questions.  ...  The present study is a cross-sectional study. The aim of present study was to statistically evaluate the quality of questions asked in an MCQ exam of I MBBS students of Smt.  ...  p is between 50% to 60% → Optimum For Discrimination Index (DI) measurement, merit was pre- pared on the basis of overall performance of the whole class.  ... 
doi:10.15373/22778179/feb2013/94 fatcat:du5i6yvzk5fmrobdigrsbw2y6a

Page 680 of Journal of Educational Psychology Vol. 30, Issue 9 [page]

1939 Journal of Educational Psychology  
The empirical selection of items by means of a single index of item validity overlooks the necessity for separate consideration of these two criteria, and any comparison of methods on this basis is, therefore  ...  Logical discussions concerning the optimum distribution of item difficulties have invariably overlooked the very important bearing of item validities on this function.  ... 

Page 509 of Psychological Bulletin Vol. 52, Issue 6 [page]

1955 Psychological Bulletin  
Table 2 presents the optimum values of p for rie’ =.30 and rie’ = .60, TABLE 2 Optimum ITEM DIFFICULTY FoR A PEAKED Test HAviNG SPECIFIED ITEM BISERIALS Proportion of Examinees to Be Selected the values  ...  PERSPECTIVES ON “THE ATTENUATION PARADOX” item difficulty for a test to be used for selecting a specified proportion, P, of the examinees, the following procedure is suggested (the procedure is outlined  ... 

Relevance of Item Analysis in Standardizing an Achievement Test in Teaching of Physical Science in B.Ed Syllabus

S. Maria Josephine Arokia Marie, Sreekala Edannur
2015 i-manager's Journal of Educational Technology  
The result of the work showed that most of the test items fall in the acceptable range of difficulty index and discrimination index.  ...  Using the findings relationship between the difficulty index of each item and the corresponding discrimination index is carried out using the Pearson correlation formula.  ...  This negative correlation signifies that graph as the difficulty index increased discrimination index also increase but to an optimum value only after which discrimination power decrease with the increase  ... 
doi:10.26634/jet.12.3.3743 fatcat:zqnizdnxfjczpn6jvrkim7pz4q

PERFORMANCE EVALUATION OF NOVEL SELECTION PROCESSES THROUGH HYBRIDIZATION OF K-MEANS CLUSTERING AND GENETIC ALGORITHM

E U HAQ
2019 Applied Ecology and Environmental Research  
the second technique (GKAopt) is based on the optimum number of clusters.  ...  The K-means cluster based genetic algorithm (GKA) selection techniques comprise of four major stages: clustering, membership probability indexing, fitness evaluation and selection.  ...  The data used to support the findings of this manuscript are taken from the website https://www.sfu.ca/~ ssurjano/optimization.html.  ... 
doi:10.15666/aeer/1706_1415914177 fatcat:dgb5l227c5byhfms7rgcpnffga

Page 25 of Evolution Vol. 2, Issue 1 [page]

1948 Evolution  
In other words, selection based on the optimum combina- tion of phenotypic measurements of the birds themselves and of their sisters is only .327 times as efficient as that possible in the hypothetical  ...  Hence, the statistical model which is used in the computation of selection intensity on the basis of gross fitness indexes may not be strictly applicable, and selection in- tensities estimated in such  ... 

Page 509 of Psychological Bulletin Vol. 52, Issue 6 [page]

1955 Psychological Bulletin  
PERSPECTIVES ON “THE ATTENUATION PARADOX” item difficulty for a test to be used for selecting a specified proportion, P, of the examinees, the following procedure is suggested (the procedure is outlined  ...  A table is given showing the optimum item-difficulty level for the peaked tests required when the examiner’s purpose is merely to classify a group of exami- nees as successful or unsuccessful.  ... 

Carving difficulties and perinatal death in daughter groups of bulls of the mry breed

GJW Mey, A Helder, SWJ van Dieten
1978 Genetics Selection Evolution  
The correlated trends of the selected traits vary, as for their value, with the applying of various selection programs, and can readily be used as tests in choosing the optimum selection model.  ...  The selection index approach accelerates the genetic progress of a population for a combined set of economic traits under the conditions of a commercial dairy cattle breeding system.  ... 
doi:10.1186/1297-9686-10-1-154a fatcat:2cmsqf47g5ea5p4yosuj5s5cji

Page 257 of SRELS Journal of Information Management Vol. 3, Issue 3 [page]

1966 SRELS Journal of Information Management  
In order that a computer be used to index a document, for example, an algorithm must be prescribed for the selection of index terms. 623 Representation of Intellectual Content of Document Whether the index  ...  terms, thus selected, adequately represent the intellectual content of the document is a difficult question to answer.  ... 

Development and Validation of a Philippine Music Achievement Test in Addressing the K to 12 Music Curriculum Learning Competencies

Almighty C. Tabuena
2020 International Journal of Innovative Research & Development  
The mean difficulty index of the test was 0.431 while the discrimination index, 0.214 which means that the test is of optimum difficulty within the difficulty index of 0.26 -0.75 accepted range, and its  ...  The mean difficulty index of the test was 0.431 while the discrimination index, 0.214 which means that the test is of optimum difficulty within the difficulty index of 0.26 -0.75 accepted range, and its  ... 
doi:10.24940/ijird/2020/v9/i4/apr20009 fatcat:i7lqijsoqjgfrhc334gtyz646q

General considerations in the selection of test items and a short method of estimating the product-moment coefficient from data at the tails of the distribution

J. C. Flanagan
1939 Journal of Educational Psychology  
provides a more valid index of item validity unaffected by difficulty.  ...  Logical discussions concerning the optimum distribution of item difficulties have invariably overlooked the very important bearing of item validities on this function.  ... 
doi:10.1037/h0053800 fatcat:hb7mhbe4wnfqlg4exahi6il6ca
« Previous Showing results 1 — 15 out of 102,835 results