INLS 509:
Information Retrieval

Description: The field of information retrieval (IR) is concerned with the analysis, organization, storage, and retrieval of unstructured and semi-structured data. In this course, we will focus on mostly text. While IR systems are often associated with Web search engines (e.g., Google), IR applications also include digital library search, patent search, search for local businesses, and expert search, to name a few. Likewise, IR techniques (the underlying technology behind IR systems) are used to solve a wide range of problems, such as organizing documents into an ontology, recommending news stories to users, detecting spam, and predicting reading difficulty. This course will provide an overview of the theory, implementation, and evaluation of IR systems and IR techniques. In particular, we will explore how search engines work, how they "interpret" human language, what different users expect from them, how they are evaluated, why they sometimes fail, and how they might be improved in the future.
Prerequisites: There are no prerequisites for this course.
Expectations: Information retrieval is the study of computer-based solutions to a human problem. Thus, the first half of the course will be system-focused, while the second half will be user-focused. During the first half, you should expect to see some math (e.g., basic probability and statistics and some linear algebra). However, we will focus on the concepts rather than the details.

Students will have an opportunity to explore their interests with a open-ended literature review.

Time & Location: M, W 11:15am-12:30pm, Manning 208 (in-person)
Instructor: Jaime Arguello (email, web)
Office Hours: By appointment, Manning 10 (Garden Level)
Required Textbook: Search Engines - Information Retrieval in Practice, W. B. Croft, D. Metzler, and T. Strohman. Cambridge University Press. 2009. Available on-line.
Additional Resources: Foundations of Statistical Natural Language Processing. C. Manning and H Schutze. 1999.

Introduction to Information Retrieval. C. Manning, P. Raghavan and H. Schutze. 2008.
Other Readings: Selected papers and chapters from other books will sometimes be assigned for reading. These will be available online.
Course Policies: Laptops, Attendance, Participation, Collaboration, Plagiarism & Cheating, Late Policy, Use of Generative AI Tools
Grading: 30% homework (10% each)
15% midterm exam
15% final exam
30% literature review (5% proposal, 10% presentation, 15% paper)
10% participation
Grade Assignments: Undergraduate grading scale: A+ 97-100%, A 94-96%, A- 90-93%, B+ 87-89%, B 84-86, B- 80-83%, C+ 77-79%, C 74-76%, C- 70-73%, D+ 67-69%, D 64-66%, D- 60-63%, F 0-59%

Graduate grading scale: H 95-100%, P 80-94%, L 60-79%, and F 0-59%.
Schedule: Subject to change! The required textbook (Croft, Metzler, and Strohman) is denoted as CMS below.
Lecture Date Events Topic Reading Due
1Mon. 8/18 Introduction to Information Retrieval: The Big Picture 
2Wed. 8/20 Course Overview: Roadmap and ExpectationsCMS Ch. 1
3Mon. 8/25 Introduction To Ad-hoc Retrieval ICMS Ch. 2, CMS 7.0-7.1
4Wed. 8/27 Introduction To Ad-hoc Retrieval II 
5Mon. 9/1Labor Day (No Class)  
6Wed. 9/3HW1 OutIndexing and Query ProcessingCMS Ch. 5.0-5.3
7Mon. 9/8 Statistical Properties of Text ICMS Ch. 4.0-4.2
8Wed. 9/10 Statistical Properties of Text II 
9Mon. 9/15Well-being Day (No Class)  
10Wed. 9/17HW1 DueText RepresentationCMS Ch. 4.3-4.7, MRS Ch. 2
11Mon. 9/22 Vector Space Model ICMS Ch. 7.0-7.1.2
12Wed. 9/24HW2 OutVector Space Model II 
13Mon. 9/29 Query Likelihood Model ICMS Ch. 7.3, CMS 4.5
14Wed. 10/1Literature Review Proposal DueQuery Likelihood Model II 
15Mon. 10/6 Document Priors 
16Wed. 10/8HW2 DueEvaluation OverviewCMS Ch. 8
17Mon. 10/13 Midterm Review 
18Wed. 10/15 Midterm 
19Mon. 10/20 Test Collection Evaluation ISanderson '10 (pages 248-298), Hersh et al., '00, Turpin & Hersh '01
20Wed. 10/22 Test Collection Evaluation IISanderson '10 (pages 308-350)
21Mon. 10/27 Experimentation ISmucker et al., '07, Cross-Validation, Parameter Tunning and Overfitting
22Wed. 10/29HW3 OutExperimentation II 
23Mon. 11/3 Interactive Information Retrieval IArguello & Crescenzi '19
24Wed. 11/5 Interactive Information Retrieval II 
25Mon. 11/10 Search Log Analysis IJoachims et al., '05
26Wed. 11/12HW3 DueSearch Log Analysis II 
27Mon. 11/17 A/B Testing IDmitriev et al., '17, Video Tutorial (Kohavi et al. '17)
28Wed. 11/19 A/B Testing II 
29Mon. 11/24 Literature Review Presentations I 
30Wed. 11/26Thanksgiving (No Class)  
31Mon. 12/1 Literature Review Presentations II 
32Wed. 12/3Literature Review DueLiterature Review Presentations III 
33Fri. 12/5Final Exam (Due 7pm)