IL State Trooper cheat sheet

Main idea = the claim the whole passage supports; a detail supports only one part. Test each option: if removing it leaves the passage's point intact, it is a detail, not the main idea.

Inference answers must be forced by the text. An option that is merely plausible in real life but not entailed by the passage is wrong.

Tone and purpose questions hinge on signal words: 'however', 'although', 'unfortunately' mark contrast or criticism; 'therefore', 'consequently' mark conclusion.

Scope check: reject answer choices broader or narrower than the passage (e.g., 'all officers' when the text says 'this unit').

For 'EXCEPT' and 'NOT' questions, verify three options against the text and eliminate; the leftover is the answer.

Sequence questions: locate time markers (first, after, before, meanwhile) and map events to a timeline before reading the options.

Author's attitude is usually stated once and implied elsewhere; a single strongly negative or positive adjective often sets the whole tone.

Vocabulary-in-context: substitute each option into the original sentence and keep the one that preserves the sentence's logic, not the most common dictionary sense.

Subject-verb agreement: the verb agrees with the head noun, not the nearest noun. 'The box of reports is' - 'of reports' is a prepositional phrase and does not control the verb.

Collective nouns (team, jury, department) take a singular verb when acting as one unit: 'The department has issued...'.

Pronoun case: after a preposition or as an object, use objective case (between you and me; for whoever/whomever test with 'he/him').

Dangling modifier rule: an introductory participial phrase must describe the subject of the main clause. 'Walking to the car, the radio was loud' is wrong because the radio was not walking.

Parallel structure: items joined by and/or must share grammatical form - 'filing, typing, and answering phones', not 'filing, typing, and to answer phones'.

Comma splice: two independent clauses need a period, semicolon, or coordinating conjunction; a comma alone is an error.

Commonly misspelled law-enforcement terms: judgment (no e after g), occurrence (double c, double r), maintenance (no 'maintainance'), separate (par-a, not per-a), defendant, affidavit, subpoena, misdemeanor.

Affect is usually a verb (to influence); effect is usually a noun (a result). Principal = main or school head; principle = rule.

Percent change = (new − old) ÷ old × 100. A 20% decrease followed by a 20% increase does not return to the original value; the net change is −4%.

Distance/speed/time: d = r × t. Convert minutes to hours before multiplying (45 min = 0.75 h).

Average (mean) = sum ÷ count; to find a missing value, multiply the mean by the count and subtract the known values.

Ratios: set up a proportion a/b = c/d and cross-multiply. Scale maps use the same proportion with unit conversion.

Work-rate formula: combined rate = 1/a + 1/b; time together = 1 ÷ (1/a + 1/b).

Area and perimeter: rectangle A = lw, P = 2(l + w); triangle A = ½bh; circle C = 2πr, A = πr².

Unit conversion chains: cancel units diagonally (miles/hour × hours = miles). Watch for mixed units (feet vs. inches, minutes vs. hours).

Order of operations: parentheses, exponents, multiplication/division left to right, addition/subtraction left to right.

Estimation shortcut: round to one significant figure to eliminate impossible answer choices before computing exactly.

Conditional 'If P then Q' permits only two valid inferences: P therefore Q (modus ponens) and not-Q therefore not-P (modus tollens). 'Not-P therefore not-Q' is the fallacy of denying the antecedent.

Contrapositive is logically equivalent to the original conditional; converse (Q→P) and inverse (not-P→not-Q) are not equivalent.

Deductive reasoning moves from general rule to specific case and yields certainty; inductive reasoning moves from specific observations to a general rule and yields probability only.

'Some' means at least one, possibly all. 'All A are B' does not imply 'all B are A'.

Syllogism check: draw a Venn diagram of the premises; a conclusion is valid only if it must hold in every diagram satisfying the premises.

Ordering puzzles: build a fixed list of positions and record constraints (A before B, C immediately after D); test each answer choice against all constraints.

Correlation is not causation; a third variable or reverse causation can explain an observed association.

Necessary vs. sufficient: a necessary condition must be present but may not be enough; a sufficient condition guarantees the result.

Encoding improves with distinctive features: record unusual marks, scars, height relative to surroundings, and clothing layers rather than generic descriptions.

Weapon focus effect: attention narrows to the threat, degrading memory for faces and peripheral detail; report confidence is a weak predictor of accuracy.

Simultaneous (lineup) presentation increases relative judgments; sequential presentation reduces false identification by forcing an absolute standard.

Cross-race identification is less accurate on average; description should note this limitation without dismissing the witness.

Visual analysis of a scene: scan systematically (left to right, top to bottom, or foreground to background) so no region is skipped.

Change blindness: unattended details can change undetected; compare specific landmarks rather than relying on a general impression.

Memory decay and post-event information contaminate recall; record the witness's first account before asking leading questions.

Time estimation under stress is unreliable; use external anchors (call logs, surveillance timestamps) rather than subjective duration.

Priority order in most scenarios: officer and public safety first, then preservation of life, then enforcement and evidence, then administrative reporting.

Use of force must be objectively reasonable, necessary, and proportional to the threat; de-escalation and time/distance are preferred when feasible.

When a policy conflicts with a supervisor's order, follow lawful policy and report the conflict through the chain of command; do not obey an unlawful order.

Documentation timing: secure the scene, render aid, then write the report while details are fresh; never alter a report after submission without a documented supplement.

Discretion factors: severity of offense, threat level, victim wishes, and statutory mandates (e.g., mandatory arrest for certain domestic violence offenses).

If unsure of legal authority, the safer course is to consult a supervisor or legal advisor before acting, unless immediate safety requires action.

Bias check: base decisions on observed behavior and articulable facts, not on race, gender, age, or neighborhood.

Escalation of a situation is justified only by a change in the subject's behavior or new information, not by frustration.

Active listening: paraphrase the speaker's content and reflect emotion before responding; this reduces defensiveness and gathers accurate information.

Integrity means doing the right thing when unobserved; accepting a small gratuity creates a duty of reciprocity and is generally prohibited.

Conflict de-escalation techniques: lower voice volume, use the person's name, acknowledge their concern, offer choices within limits.

Confidentiality: share information only on a need-to-know basis; unauthorized disclosure can compromise investigations and violate policy.

Truthfulness in reports is non-negotiable; a single fabrication undermines every case the officer touches and can be a criminal offense.

Peer intervention (duty to intervene) applies when a colleague uses excessive force or engages in misconduct; report through the chain of command.

Cultural and communication differences affect perception of eye contact, personal space, and tone; misinterpretation can escalate encounters.

Ethical dilemmas often test competing goods; identify the duty owed to the public, the agency, and the individual, then choose the option that satisfies the most binding duty.

A report must answer who, what, when, where, why, and how, plus the disposition (arrest, citation, referral, no action).

Write in past tense, first person, active voice, and chronological order; avoid jargon and conclusory language such as 'the subject was disorderly' without describing the conduct.

Quote verbatim statements in quotation marks; paraphrase without quotation marks only when the meaning is preserved and attributed.

Record exact times, locations, names, dates of birth, and evidence chain of custody; approximate values must be labeled as approximate.

Avoid pronouns with ambiguous antecedents ('he' referring to either of two males); repeat the name or use a distinguishing label.

Distinguish observation from opinion: 'I observed the subject sway and smell of alcohol' rather than 'the subject was intoxicated'.

Report facts that support each element of the offense charged; missing elements are the most common reason a report fails review.

Corrections are made with a single line through the error, initials, and date; never obliterate or use correction fluid.

Physical ability tests typically include a timed obstacle/agility course, a 1.5-mile or 2-mile run, push-ups, sit-ups, and a vertical jump or sit-and-reach; standards vary by agency and are usually sex- and age-normed.

Cardiorespiratory endurance is trained by continuous aerobic work at 60–80% of maximum heart rate, 3–5 sessions per week, 20–60 minutes per session.

Muscular endurance (push-ups, sit-ups) improves with higher-repetition sets (15–30 reps) and short rest intervals; strength improves with lower reps and heavier load.

Progressive overload: increase volume or intensity by roughly 5–10% per week to avoid injury and plateaus.

Agility and change-of-direction drills (shuttle runs, cone drills, ladder work) train the deceleration and cutting skills tested on obstacle courses.

Flexibility work should follow a warm-up; static stretching before maximal effort can temporarily reduce power output.

Taper 5–7 days before a test: reduce volume while keeping intensity, and prioritize sleep and hydration.

Hydration and heat: even 2% body-mass fluid loss impairs endurance performance; pre-hydrate and avoid alcohol before testing.