Law Enforcement Officer Selection Tool (LST)

Officer Selection
Tool – LST

Exam Highlights:

Law Enforcement Selection Tool - LST
The LST is IOS’ most recently developed entry-level law enforcement examination and represents state-of-the-art research and design. This examination combines four measures into one result, providing a more holistic picture of a test takers’ potential. The LST combines a challenging cognitive ability measure with three non-cognitive measures: personality constructs, integrity, and biographical data. These four measures produce a score for test takers that is highly predictive of their job success in law enforcement.

Exam Features:

  • Parallel Forms: Four (4) – Form A, Form B, Form C, Form D
  • Length: Cognitive Ability Measure – 70 items, Non-cognitive Measures (Personality, Integrity, Biographical Data) – 120 items
  • Administration Time: 2 ½ Hours, separately timed sections for Cognitive (2 hours) and Non-cognitive (30 minutes) plus 15 minutes for instructions
Measurement Domains:


  • Deductive Reasoning
  • Inductive Reasoning
  • Information Gathering
  • Spatial Orientation
  • Visualization
  • Written Comprehension
  • Written Expression

Non-cognitive – Personality Constructs: 

  • Conscientiousness
  • Extraversion
  • Emotional Stability

Non-cognitive –

  • Adaptability/Flexibility
  • Initiative/Persistence/Dependability
  • Leadership
  • Mechanical Operations
  • Physical Activity Orientation
  • Service Orientation
  • Social Engagement with Others/Teamwork
  • Stress Tolerance

Non-cognitive –

  • Anti-Social Behaviors
  • Socialization
  • Safety Orientation
  • Orderliness
Available Study Materials:

We recommend agencies secure study materials for candidates directly, or provide information on where to find legitimate and accurate study preparation materials.

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Industrial Organizational Solutions
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Law Enforcement Selection Tool - LST