Systematic Searching Kieran Lamb Head of Library Services Fade Library, Liverpool PCT
OR, AND, NOT
PICO and ECLIPS tools to make designing a search strategy easy
Natural Language and Controlled Vocabularies explained
Where to Search?
Outline
OR OR – expands a search by creating an either or situation FISH OR CHIPS Retrieves FISH CHIPS FISH AND CHIPS
AND AND – limits a search by creating an situation where all elements must be present FISH AND CHIPS Retrieves FISH AND CHIPS
NOT – limits a search by creating an situation by excluding records CHIPS NOT FISH Retrieves CHIPS NOT
PICO P – patient or population I – Intervention C – Comparison O – Outcome Within columns OR between columns AND
ECLIPS E – Expectation C – Client Group L – Location I – Impact P – Profesionals involved S – Service Within columns OR between columns AND
Controlled Vocabularies use preferred terms to describe concepts e.g. the MESH preferred term for PRIMARY CARE is PRIMARY HEALTH CARE
Natural language searches search for the term exactly as you type it and is author dependent.
Systematic searches will use both natural language and controlled vocabularies in their strategy
Natural Language and Controlled Vobaularies
Natural Language v Controlled Vobaularies
+ ensures maximum retrieval
+ precisely defined and consitent
+ hierarchy enhances search
+ brownie points for assignments!
- time lag in adoption of new concepts
need to be consistently applied
native to each product
+ simple and natural + precise way of searching (superficially) + keeps up-to-date with new developments - Soft use of languages means synonyms predominate Controlled Vocabulary Searches for preferred key terms Natural Language Searches for exactly the term you type
Databases to Search
NHS Evidence – Synthesised evidence and materials from NHS Evidence Specialist Collections (Evidence based materials)
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