Comparing Cohorts of Event Sequences
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1 Comparing Cohorts of Event Sequences A VISUAL ANALYTICS APPROACH presented by Sana Malik with Fan Du, Catherine Plaisant, and Ben Shneiderman May 26, 2016 HCIL 33 rd Annual Symposium, College Park
2 often, analysts compare cohorts within datasets
3 any groups of users, patients, or records often, analysts compare cohorts within datasets
4
5
6 ?
7 FREQUENT PATTERNS
8 ABSENCE OF EVENTS
9 DURATION
10 Data Collection Cohort Selection Statistics
11 Data Collection Cohort Selection Visual Analytics Statistics
12 Data Collection Cohort Selection Visual Analytics Statistics
13 EVENTFLOW Monroe et al. Temporal event sequence simplification. IEEE Transactions on Visualization and Computer Graphics (TVCG 2013).
14 EVENTFLOW Monroe et al. Temporal event sequence simplification. IEEE Transactions on Visualization and Computer Graphics (TVCG 2013).
15 EVENTFLOW? Monroe et al. Temporal event sequence simplification. IEEE Transactions on Visualization and Computer Graphics (TVCG 2013).
16 Data Collection Cohort Selection Visual Analytics Statistics
17 Aspirin -> Emergency -> Normal Floor Bed -> ICU -> Exit 38.37, 0.0, 4.11e-123 Emergency -> ICU -> Exit 24.61, 0.0, 2.11e-73 Emergency -> Normal Floor Bed -> Exit -> ICU 5.26, 0.0, 4.12e-15 Emergency -> Normal Floor Bed -> ICU -> Exit 5.26, 0.0, 4.12e-15 Aspirin -> Emergency -> ICU -> Normal Floor Bed -> Exit 7.89, 3.22, 1.20e-06 Aspirin -> Emergency -> ICU -> Intermediate Care -> Exit 4.15, 0.0, 4.22e-12 Emergency -> Normal Floor Bed -> ICU -> Intermediate Care -> Exit 2.97, 0.0, 7.02e-09 Aspirin -> Emergency -> ICU -> Exit 2.80, 0.0, 2.02e-08 Emergency -> Normal Floor Bed -> ICU -> Normal Floor Bed -> Exit 1.44, 0.0, 9.83e-05 Emergency -> Normal Floor Bed -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> Exit 1.01, 0.0, 0.00 Aspirin -> Emergency -> Normal Floor Bed -> ICU -> Intermediate Care -> Exit 0.76, 0.0, 0.00 Aspirin -> Emergency -> Normal Floor Bed -> Exit 0.0, 1.61, 3.37e-05 Aspirin -> Emergency -> ICU -> Normal Floor Bed -> ICU -> Exit 0.0, 2.37, 2.84e-07 Aspirin -> Emergency -> Normal Floor Bed -> ICU -> Normal Floor Bed -> Exit 3.82, 6.45, 0.00 Emergency -> ICU -> Normal Floor Bed -> ICU -> Exit 0.0, 4.07, 7.17e-12 Emergency -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> Exit 0.0, 4.24, 2.48e-12 Emergency -> Exit 0.0, 11.88, 9.00e-34 Emergency -> ICU -> Normal Floor Bed -> Exit 0.0, 16.12, 2.18e-46 Aspirin -> Emergency -> Exit 0.0, 47.79, 2.49e-162 Aspirin -> Emergency -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> Exit 0.0, 0.59, 0.02 Aspirin -> Emergency -> Normal Floor Bed -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> Exit Aspirin -> Emergency -> ICU -> Exit 2.80, 0.0, 2.02e-08 Emergency -> Normal Floor Bed -> ICU -> Normal Floor Bed -> Exit 1.44, 0.0, 9.83e-05
18 5.26, 0.0, 4.12e-15 Emergency -> Normal Floor Bed -> ICU -> Exit 5.26, 0.0, 4.12e-15 Aspirin -> Emergency -> ICU -> Normal Floor Bed -> Exit 7.89, 3.22, 1.20e-06 Aspirin -> Emergency -> ICU -> Intermediate Care -> Exit 4.15, 0.0, 4.22e-12 Emergency -> Normal Floor Bed -> ICU -> Intermediate Care -> Exit 2.97, 0.0, 7.02e-09 Aspirin -> Emergency -> ICU -> Exit 2.80, 0.0, 2.02e-08 Emergency -> Normal Floor Bed -> ICU -> Normal Floor Bed -> Exit 1.44, 0.0, 9.83e-05 Emergency -> Normal Floor Bed -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> Exit 1.01, 0.0, 0.00 Aspirin -> Emergency -> Normal Floor Bed -> ICU -> Intermediate Care -> Exit 0.76, 0.0, 0.00 Aspirin -> Emergency -> Normal Floor Bed -> Exit 0.0, 1.61, 3.37e-05 Aspirin -> Emergency -> ICU -> Normal Floor Bed -> ICU -> Exit 0.0, 2.37, 2.84e-07 Aspirin -> Emergency -> Normal Floor Bed -> ICU -> Normal Floor Bed -> Exit 3.82, 6.45, 0.00 Emergency -> ICU -> Normal Floor Bed -> ICU -> Exit 0.0, 4.07, 7.17e-12 Emergency -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> Exit 0.0, 4.24, 2.48e-12 Emergency -> Exit 0.0, 11.88, 9.00e-34 Emergency -> ICU -> Normal Floor Bed -> Exit 0.0, 16.12, 2.18e-46 Aspirin -> Emergency -> Exit 0.0, 47.79, 2.49e-162 Aspirin -> Emergency -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> Exit 0.0, 0.59, 0.02 Aspirin -> Emergency -> Normal Floor Bed -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> Exit Aspirin -> Emergency -> ICU -> Exit 2.80, 0.0, 2.02e-08 Emergency -> Normal Floor Bed -> ICU -> Normal Floor Bed -> Exit 1.44, 0.0, 9.83e-05 Emergency -> Normal Floor Bed -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> ICU -> Normal Floor Bed -> Exit 1.01, 0.0, 0.00 Aspirin -> Emergency -> Normal Floor Bed -> ICU -> Intermediate Care -> Exit 0.76, 0.0, 0.00 Aspirin -> Emergency -> Normal Floor Bed -> Exit
19 SAS STATA SAS Business Analytics Software. Vers SAS Institute, Computer software. StataCorp Stata Statistical Software: Release 14. College Station, TX: StataCorp LP.
20 Data Collection Cohort Selection Visual Analytics Statistics
21 Visual Analytics Data Collection Cohort Selection Statistics
22
23 HIGH-VOLUME Hypothesis Testing
24 HIGH-VOLUME Hypothesis Testing Systematic Exploration OF RESULTS
25 HIGH-VOLUME Hypothesis Testing Systematic Exploration OF RESULTS REAL-WORLD Case Study
26 HIGH-VOLUME Hypothesis Testing
27
28 Emergency Room
29 Normal Floor Bed
30 ICU
31 Discharged
32
33 start and end of record
34
35
36
37
38
39 non-consecutive (contains other events between)
40 1 SHORT SEQUENCE 14 UNIQUE PATTERNS non-consecutive (contains other events between)
41 RECORD COVERAGE Does this sequence occur in more records in one cohort than the other? DURATION On average, does this sequence take longer in one cohort than the other? FREQUENCY On average, does this sequence occur more frequently per record in one cohort than the other?
42 RECORD COVERAGE Does this sequence occur in more records in one cohort than the other? 14 UNIQUE PATTERNS DURATION On average, X 3 does METRICS this sequence take longer in one cohort than the other? 42 On average, does HYPOTHESES this sequence occur more frequently per user in one cohort than the other? FREQUENCY
43 HIGH-VOLUME Hypothesis Testing Systematic Exploration OF RESULTS REAL-WORLD Case Study
44 Systematic Exploration OF RESULTS
45
46 Demo
47 HIGH-VOLUME Hypothesis Testing Systematic Exploration OF RESULTS REAL-WORLD Case Study
48 REAL-WORLD Case Study
49 MULTI-DIMENSIONAL IN-DEPTH LONG-TERM CASE STUDIES (MILCS) Entry Interview & Training (1 session) Partners Use Tool Partners Provide Feedback (3 months) Researchers Refine Tool Exit Interview (1 session) For Researchers Demonstrate utility, refine tool For Partners Papers, insights, discoveries B. Shneiderman and C. Plaisant. Strategies for evaluating information visualization tools: Multidimensional in-depth long-term case studies. In BELIV 06: Proceedings of the 2006 AVI workshop on BEyond time and errors, pages 1 7. ACM, 2006.
50 CASE STUDY PARTNERS
51 CASE STUDY PARTNERS
52 PARTICIPANTS & DATASET Three analysts at Adobe One experienced user Two novice users Users events on a product website viewing the display ads signing up for promotions or free trials purchasing products Dataset Size 6,999 users 124 events types / 81,563 events
53 GOAL Compare users who purchased a product with using trials versus without using trials to understand ad-related behaviors
54 SYSTEM USE
55 SYSTEM USE
56 SYSTEM USE Event filtering was the most helpful to focus the analysis
57 SYSTEM USE Reduced metric calculation time provided a much better user experience for data analysis
58 RESULTS: FOR PARTNERS Users who had a trial viewed display ads more than the other group & contained more retargeting events. Analysts hypothesized trial users were explorers and non-trial users were experienced users based on event pattern differences
59 Future Work Extensions to other data types (e.g., networks) HIGH-VOLUME Hypothesis Testing Systematic Exploration OF RESULTS Interval events REAL-WORLD Case Study Cohort selection
60 Comparing Cohorts of Event Sequences A VISUAL ANALYTICS APPROACH TRY COCO! maliks@cs.umd.edu www presented by Sana Malik Support from Adobe, Oracle, and the University of Maryland s Center for Health-related Informatics & Bioimaging (CHIB).
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