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G o o g l e TM or PubMed. Which is Better for Medical Searching?. Agenda. Introduction Overview of Search Tools Strengths Coverage, Functionality, and Special Features Limitations Search Examples Recommendations Q&A. The Author. - PowerPoint PPT Presentation
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2 Denise O'Shea
Agenda
Introduction Overview of Search Tools
Strengths Coverage, Functionality, and Special
Features Limitations
Search Examples Recommendations Q&A
3 Denise O'Shea
The Author
Former Technology Programs Manager for the National Network of Libraries of Medicine (NN/LM), Middle Atlantic Region
Certified Instructor for web searching courses such as Super Searcher
Librarian, experienced in web searching using a myriad of tools including PubMed, Google, Google Scholar, ClinicalTrials.Gov and much more…
I use Google often, when appropriate
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Objectives
Participants will be able to:Communicate the differences between
the Google, Google Scholar and PubMed and justify the choice of search engine for a given information need;
Evaluate medical research tools; Demonstrate familiarity with resources
covered in the course;
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Introduction
Compare these search tools and list what you think are the TWO most important search features in each:GoogleTM
Google ScholarTM
PubMed
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Search Tools: Overview
It’s important to know:How the different search tools work
and how they are best utilizedThe strengths and limitations of
different search toolsCoverage and Currency:
• How big is the database being used? • What does it contain?• How often is it updated or refreshed?
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PubMed vs. Google vs. Google Scholar
Google: searches over 8 billion web pages for general information
Google Scholar: searches the web for scholarly materials from broad areas of research
PubMed: a searchable collection of over 15 million bio-medical journal citations
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GoogleTM: Strengths
Simplicity, speed and coverage Searches web pages, images, PDFs,
Word documents and much more Easy-to-use search interface
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Google ScholarTM Beta: Strengths Easy means to access health literature and
interdisciplinary topics Useful for citation verification Allows users to search inside the text of an
article Provides linking to free materials on the Web Include reports and conferences proceedings
from professional societies and associations Access to Grey Literature Backup for when local subscription links are
not working
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PubMed: Strengths
Updated daily* Sophisticated search tools Related Articles / Abstract Plus Good documentation Links to local holdings Ad free
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Google: Special Features
It uses a Boolean (and/or) search engine to find words in web-pages
It ranks pages according to the links on the page and the popularity of the pages that link to other pages
Automatic spellchecker
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Google Scholar: Special Features Links to local holdings and to OCLC
WorldCat with “one click” service Locates chapters within multi-
authored books and conference proceedings
Cited-by feature
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PubMed: Special Features
Uses MeSH headings to match synonyms Manual indexing by subject experts can
include words not contained in the abstract Clipboard, RSS Feeds, e-mailed search
results You can customize your results page Growing free content (PubMed Central) Search history Easily link to a vast array of other
biomedical databases through global search
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Google: Limitations
Page ranking based on popular opinion Timeliness Does not suggest alternative search
terms or synonyms Limited field searching (can’t search
based on age or gender, or search for a research method or publication type)
Limited Boolean logic, no truncation No resorting by most current
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Google Scholar: Limitations
Software is in Beta Coverage – no definition of ‘scholarly’
Search results may not be as comprehensive or as current as you need
Bias towards older literature (due to ranking based on number of citations)
Fee-for-service document delivery Sorting features (or lack there-of) Does not always suggest alternative spellings
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PubMed: Limitations
Complex interface requires training to use effectivelyNeed to understand the structure &
functionality of the database Some features require the use of
cookies Some features require a login and
password (MyNCBI)
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To Google…or Not to Google? Google:
Simple searches, quick reference tool Not designed for comprehensive research or clinical
questions Google Scholar
Known item searching, to learn background info on a topic Not designed for comprehensive research or clinical
questions PubMed:
Complex searches Current information Literature reviews (i.e., for grants, clinical trials or evidence
based medicine), PICO Ability to save searches, view search history, schedule e-
alerts Don’t use to search for general information on the Web
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A Selected List of Other Medical Search Tools Scirus – a search engine for scientific, technical and medical
data (http://www.scirus.com). Competitor to Google Scholar. Relamed – searches PubMed and assigns relevance to results
(http://www.relemed.com) Hubmed – an alternative interface to PubMed (
http://www.hubmed.org/) Science Research Portal – a free, publicly available Internet
web portal allowing access to numerous scientific journals and public science databases (http://www.scienceresearch.com/search/)
XplorMed – a word relationship search engine for PubMed (http://www.ogic.ca/projects/xplormed//). It searches for articles based on word semantics and relationships.
Plus bibliographic databases and full-text ejournals subscribed to by your library
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The Future
Google Co-op Customized Search Engines
• http://www.healthfind.com/ Subscribed Links
• http://google.com/coop/subscribedlinks/directory/Health
Topics• http://www.google.com/coop/topics/Health
PubMed RSS feeds New/Noteworthy NLM Tech Bulletin
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Reading & Further Resources Giustini, D., & Barsky, E. (2005). A look at Google Scholar,
PubMed...a comparison. JCHLA/JABSC, 26. Giustini, D., & Barsky, E. (2005). Using Google Scholar in Health
Research: A Comparison with PubMed. Paper presented at the CHLA/ABSC. from http://chla-absc.ca/2005/Presentations/0601/GiustiniBarsky_CHLA2005.pdf.
Henderson, J. (2005). Google Scholar: a source for clinicians? CMAJ, 172(12).
New Search Engine for Finding Articles in PubMed. (2007). from http://www.researchbuzz.org/wp/2007/03/05/new-search-engine-for-finding-articles-in-pubmed
UCLA. (2007). Google Scholar™, Search Engines, Databases, and the Research Process. from http://www2.library.ucla.edu/googlescholar/index.cfm
Vine, R. (2006). Google Scholar: A Source for Technicians. J Med Library Assoc., 94(1), 97-99.
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Contact Info
Denise O’Shea
Systems Librarian
Fairleigh Dickinson University
Teaneck and Madison, NJ