General Aptitude and Reasoning for Correctional Officers
What the aptitude domain measures
Aptitude items test whether you can read carefully, reason with numbers, and spot patterns under time pressure. The core concepts are: arithmetic (percentages, ratios, averages, unit rates), reading comprehension (main idea versus detail, inference), logical sequencing (ordering events, schedules, or steps), and pattern or classification reasoning (odd-one-out, next-in-series). Correctional work applies these daily: counting inmates during a formal count, computing overtime or leave balances, and interpreting a policy paragraph correctly.
Traps to watch for
- Extra information. Many word problems include numbers you never need. Identify the question asked before computing.
- Unit mismatches. Minutes versus hours, per-day versus per-shift. Convert first.
- Reversed relationships. "A is taller than B but shorter than C" tempts you to rank from the wrong end; write the chain out.
- Absolute words. In reading items, options containing always, never, or all are usually wrong when the passage says generally or may.
- Nearly-right distractors. Two answers differ by one step of arithmetic. Recheck your operation, not just your numbers.
Rule of thumb
For any quantitative item, write the given values, name the unknown, and state the operation in words before calculating. For reading items, answer from the passage only, never from outside knowledge.
Worked example
An officer works 8-hour shifts. Over 5 days she works 3 full shifts and 2 shifts of 6 hours. Total hours = (3 × 8) + (2 × 6) = 24 + 12 = 36. Average per day = 36 ÷ 5 = 7.2 hours. A distractor offering 7.5 comes from averaging 8 and 6 without weighting; another offering 36 answers the wrong question. Confirm which quantity is requested before selecting.