Behrooz Mostafavi

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OBJECTIVE We have assessed the expression levels of messenger RNA for estrogen receptor-alpha and splice variants lacking exon 5 or exon 7 that presumably exert dominant positive (splice variants lacking exon 5) and negative (splice variants lacking exon 7) effects, respectively, on estrogen responses in the human endometrium. STUDY DESIGN This was a(More)
AND V.I.I. JOHN STAMPER Carnegie Mellon University, USA ________________________________________________________________________ Hint annotation is one of the most time consuming components of developing intelligent tutoring systems. One approach is to use educational data mining and machine learning techniques to automate the creation of hints from student(More)
Deductive logic is essential to a complete understanding of computer science concepts, and is thus fundamental to computer science education. Intelligent tutoring systems with individualized instruction have been shown to increase learning gains. We seek to improve the way deductive logic is taught in computer science by developing an intelligent,(More)
Research shows that expert-crafted worked examples can have a positive effect on student performance. To investigate the potential for data-driven worked examples to achieve similar results, we generated worked examples for the Deep Thought logic tutor, and conducted an experiment to assess their impact on performance. Students who received data-driven(More)
Automatic problem generation for learning tools can provide the required quantity and variation of problems necessary for an intelligent tutoring system. However, this requires an understanding of problem difficulty and corresponding features of student performance. Our goal is to automatically generate new proof problems in Deep Thought – an online(More)
Many tutors offer students reference material or tips that they can access as needed. We have logged data about student use of references with Deep Thought logic tutor which to understand why and how references are used. We find evidence that students use these references in systematic ways that change over the course of the tutor, and can be predictive of(More)