Discrimination
About 7 min · General Intelligence and Reasoning · English
Time worked out from the lesson's 544 words at 150 words a minute, plus a minute for each question.
Discrimination is a fundamental visual reasoning skill tested in SSC GD that requires you to identify subtle differences between figures, patterns, or groups that appear highly similar at first glance. Unlike classification problems where you pick the odd one out, discrimination questions focus on your ability to notice fine details—differences in size, orientation, shading, number of elements, or arrangement—that distinguish otherwise identical-looking items.
Key ideas
- Discrimination vs Classification: Discrimination finds differences between similar items; classification groups similar items and finds the odd one. Both test visual reasoning but require opposite mental approaches.
- Systematic scanning technique: Examine figures from left-to-right, top-to-bottom. Check one feature type at a time (shape, then size, then shading) rather than trying to see everything at once.
- Common difference categories: Size variations (larger/smaller elements), orientation changes (rotated/flipped parts), element count (extra/missing components), shading patterns (filled/unfilled sections), position shifts (elements moved slightly).
- Mirror vs rotation confusion: A horizontally flipped figure looks different from a rotated one. Train your eye to distinguish flips (mirror images) from turns (rotations).
- Minute detail focus: The difference might be as small as one dot, a single line direction change, or a tiny gap. The exam deliberately makes figures nearly identical to test concentration.
Watch out for
- Rushing the comparison → Looking at all features simultaneously causes you to miss the single critical difference. FIX: Adopt a checklist approach—examine one feature category across all figures before moving to the next feature.
- Assuming symmetry → Students expect figures to be symmetric and miss asymmetric elements. FIX: Always verify symmetry explicitly; don't assume it exists.
- Confusing similar shapes → Mixing up hexagons with octagons, or small size differences as identical. FIX: Count sides/vertices explicitly rather than relying on gestalt impressions.
Quick reference
- Scan order: Count elements → Check orientations → Compare sizes → Verify shading → Look for position shifts.
- Common traps: One dot missing, single line direction reversed, tiny size change, one shape flipped.
- Time limit: 30–40 seconds per discrimination question; mark difficult ones for later review.
- Elimination strategy: If two figures are definitely identical, eliminate both and focus on remaining options.
- Practice makes perfect: Discrimination accuracy improves with daily practice.
Check yourself: 3 questions
1. Four figures are shown below: Figure 1: A circle with a horizontal line inside it Figure 2: A square with a horizontal line inside it Figure 3: A triangle with a horizontal line inside it Figure 4: A circle with a vertical line inside it Which figure is different from the other three?
2. Five figures are given below: Figure A: A pentagon with three dots inside Figure B: A hexagon with four dots inside Figure C: A square with three dots inside Figure D: A triangle with three dots inside Figure E: A circle with three dots inside Which figure does NOT belong to the group?
3. Four patterns are shown: Pattern 1: A circle divided into 4 equal parts with 3 parts shaded Pattern 2: A square divided into 4 equal parts with 3 parts shaded Pattern 3: A triangle divided into 4 equal parts with 2 parts shaded Pattern 4: A rectangle divided into 4 equal parts with 3 parts shaded Identify the pattern that is different from the others.
This lesson is cut from the topic's note, not rewritten. Fact-checked on 18 Oct 2026: an AI-assisted check of this note against cited sources; the errors it found were corrected that day. Some errors may remain. The questions are from Shishya's validated question bank.
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