The Law Enforcement Aptitude Battery (LEAB)

The LEAB is the battery New Jersey's Law Enforcement Examination is built on. Understanding its structure is the single most useful thing a candidate can do, because it tells you exactly where preparation pays off and where it is wasted.

It has three components. Only one of them rewards study.

1. The Ability Test

This is the cognitive portion, and it is the only part of the battery where preparation moves your score. It measures general abilities rather than police knowledge, across competencies including:

• Written comprehension. Reading a passage and correctly understanding what it says, including what it does not say.
• Written expression. Conveying information in writing so that another person takes the intended meaning from it.
• Deductive reasoning. Applying a general rule to a specific situation.
• Inductive reasoning. Working from specific facts to a general conclusion, which is the shape of most investigative thinking.
• Information ordering. Arranging things into a correct sequence according to a rule.
• Problem sensitivity. Noticing that something is wrong, or is about to be.

These are trainable. Practice with reading comprehension, logical reasoning, and information-ordering questions transfers directly, because the underlying ability is the same regardless of who wrote the question.

2. The Work Styles Questionnaire

A personality and work-style inventory. There is no syllabus, no right answer to memorize, and no book that will improve your result. Attempting to game it by guessing what the department wants to hear is a bad idea, because these instruments are built with consistency checks and an inconsistent respondent is a visible one.

3. The Life Experience Survey

A structured account of your background and past behavior. Again, nothing to study. It asks what you have done, and the only preparation is having done it.

What this means for buying books

Two thirds of the battery is unstudiable. That is not a reason for despair, it is a reason to spend your preparation time precisely: put all of it into the Ability Test, and specifically into the reasoning and comprehension skills above.

It also means that any product marketed as complete preparation for a New Jersey law enforcement exam is overselling. It cannot prepare you for two of the three components, because those components cannot be prepared for.

Related: The New Jersey Law Enforcement Examination · The NJ municipal police officer exam · The NJ correctional police officer exam · The New Jersey firefighter exam · All New Jersey public safety exams