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In a classification task, the precision for a class is the number of true positives (i.e. the number of items correctly labelled as belonging to the positive class) divided by the total number of elements labelled as belonging to the positive class (i.e. the sum of true positives and false positives, which are items incorrectly labelled as belonging to the class).
In medicine and statistics, sensitivity and specificity mathematically describe the accuracy of a test that reports the presence or absence of a medical condition. If individuals who have the condition are considered "positive" and those who do not are considered "negative", then sensitivity is a measure of how well a test can identify true ...
Accuracy is also used as a statistical measure of how well a binary classification test correctly identifies or excludes a condition. That is, the accuracy is the proportion of correct predictions (both true positives and true negatives) among the total number of cases examined. [10] As such, it compares estimates of pre- and post-test probability.
It is the UK's Open University's contribution to the open educational resources (OER) project and the home of free, open learning from The Open University. [5] The original project was part-funded by the William and Flora Hewlett Foundation. [6] OpenLearn is a member of the OpenCourseWare Consortium (OCWC). [7]
The relationship between sensitivity and specificity, as well as the performance of the classifier, can be visualized and studied using the Receiver Operating Characteristic (ROC) curve. In theory, sensitivity and specificity are independent in the sense that it is possible to achieve 100% in both (such as in the red/blue ball example given above).
Open learning is an innovative movement in education that emerged in the 1970s and evolved into fields of practice and study. The term refers generally to activities that either enhance learning opportunities within formal education systems or broaden learning opportunities beyond formal education systems. [ 1 ]
In the United Arab Emirates, a discussion, led by Dr. Linzi J. Kemp, American University of Sharjah, [51] has begun about sharing teaching and learning materials (‘open course ware’) through a community of educators and practitioners in the GCC. There is growing availability of high quality and free open access materials shared between ...
OER Commons, created by the Institute for the Study of Knowledge Management in Education, was developed to serve curriculum experts and educators in discovering open educational resources (OER) and collaborating around the use, evaluation, and improvement of those materials. [1]