Forensic science Intigrated site Fsis

Class & Individual Characteristics of Handwriting

Learn how forensic experts analyze handwriting by identifying class characteristics (common writing features) and individual characteristics (unique traits) to compare and identify a writer. ✍️

QUESTIONED DOCUMENT

Rahul

3/8/20261 min read

Class & Individual Characteristics of Handwriting

Class Characteristics

Line Quality

  • Smooth vs. shaky lines indicate writing skill and speed.

Baseline Alignment

  • Writing may follow, rise above, or fall below the baseline.

  • Consistent alignment is a class trait; erratic alignment may be individual.

Pen Pressure

  • Light, medium, or heavy pressure.

  • Pressure affects ink flow and line thickness.

Size of Letters

  • Large, medium, or small letters reflect training and sometimes personality.

  • Consistency in size is a class trait; variation may be individual.

Spacing

  • Space between letters, words, and lines.

  • Uniform spacing is often taught; irregular spacing may be personal.

Slant

  • Letters may slant right, left, or be upright.

  • Slant is often culturally influenced and taught in schools.

Movement

  • Refers to which part of the arm is used: fingers, wrist, forearm, or shoulder.

  • Finger movement is common in beginners; forearm movement is smoother and more skilled.

Individual Characteristics

Letter Formation

  • Unique ways of forming letters, especially unusual strokes or loops.

  • Deviations from standard forms are highly individual.

Connecting Strokes

  • How letters are joined—continuous, broken, or mixed.

  • Some writers connect all letters; others lift the pen frequently.

Pen Lifts

  • Frequency and location of pen lifts.

  • Excessive lifts may suggest copying or unnatural writing.

Cursive vs. Print

  • Some writers mix cursive and print styles.

  • This hybrid style is often unique.

Flourishes and Embellishments

  • Extra loops, curls, or decorative strokes.

  • These are often unconscious and highly personal.

Diacritic Placement

  • Position of dots on “i” and crosses on “t”.

  • Consistent placement is a strong identifier.

Size Consistency

  • Variation in letter height and width.

  • Inconsistent sizing may reflect emotional state or personality.

Speed and Rhythm

  • Fast writing is fluid; slow writing may show hesitation.

  • Rhythm reflects confidence and familiarity with writing.

Class & Individual Characteristics of Handwriting