Handwriting_analysis.ppt

Forensic analysis of handwriting

1. HANDWRITING ANALYSIS
PALLAVI KUMARI

2. Principles of Handwriting
Handwriting comes from brain.
No two persons can write exactly
alike.
No two samples made by one person
be exactly same.
Every person has a range of natural
variation to his or her writing;
No writer can exceed his or her skill
level.

3. Class Characteristics
•Similarities between individuals or groups of individuals
taught the same or similarwriting systemsare known as
Class Characteristics.
•These may be quite different from other groups of
individuals but consistent within that specific group.

4. Individual Characteristics
Individual characteristics are as unique to a
specific writer.
It requires a combination of individual
characteristics and frequency of
occurrence to make an individual’s
handwriting unique to him.
In forensic handwriting analysis, there are
twelve characteristics to be considered
when determining whether or not a
signature is forged or not.

5. Fundamental Divergences
They exist in the handwriting two different
persons.
They are used during comparison of
handwriting samples whether the questioned
handwriting is written by same person or not?
They are used to approve or disapprove the
writer of questioned handwriting sample.

6. Line Quality
Line qualityis the thickness, strength, and
flow of the letters. Some factors are if the
letters are flowing, shaky, or very thick.

7. Spacing
Letterspacingistheamountofspaceput
betweenletters.Theletterscouldallbe
connectedorspaceddrastically.Whetherthe
lettersareequallyspacedcrowdedormargins
areevenlyspaced

8. Size Consistency
Height, width, and size of the Lettersis very
self-explanatory; this simply analyzes the
proportions of the handwriting. Is one letter
unusually tall or short?

9. Initial and Terminal Strokes
Beginning and Ending Strokeslooks at how
the writer begins and ends their words. Do
they end with a curl, and on an upstroke or a
downstroke?

10. Connecting Letters
Connecting strokes between the letters
Rounded
Deep and sharp
Straight
Angular

11. Slant
Slantlooks at which way the letters tend to
slant, either to the left, right, or no slant at all.
The most average slant is to the right.

12. Cursive and Printed Letters
Are there printed letters, cursive letters, or
both?

13. Pen Pressure
Is pressure equal when applied to upward and
downward strokes?

14. Slant
Left, right, or variable?

15. Alignment
Is the text on the line, above the line, or below
the line?

16. Fancy Curls or Loops
Are there fancy loops?
Any other distinguishing features?

17. Places of Crosses
on t’s & Dots on i’s
Are t’s crossed?
t’s crossed in middle, toward top, or toward
bottom
Are i’s dotted?
Dotted toward left, toward right, or centered

18. Standards for handwriting
comparison
A set of handwritten or hand printed standards.
Standards must be adequate for comparison
purposes.
They must contain a sufficient quantity of
properly prepared material so as to indicate
not only the individual writing habits of the
author but also the range of variation from
specimen to specimen in these habits.

19. Collected/Admitted standards
Collected standards: They consists of writing
or printing executed from day to day in the
course of business, social, or personal affairs.
Such standards may be referred to as
collected standards.

20. Request or dictated
standards
They consists of specimens of the person's
writing or printing executed upon request of
the investigating officers for the sole purpose of
comparison with the questioned documents. An
examiner may dictate to a potential suspect,
slowly then faster so that they have less chance
of disguising the handwriting.
Use same ink and paper (as said before) pencil,
ballpoint pen, fountain pen, marker, etc.

21. Requirements of standards
The amount of standard writing available
The similarity of type of writing
The relative date of execution of disputed and
standard writing
The conditions under which both questioned
and known writing were executed
The type of writing instruments and paper
employed.

22. Amount of standard writing
No definite rule can be formulated for
determining the minimum number of standard
signatures necessary for a particular
examination.
In the majority of investigations, between 15
and 20 specimen signatures should prove
adequate, but because of the individual or the
conditions under which the standards were
prepared this may not be a sufficient amount.

23. Similarity of Subject Matter
In addition quantity of writing, standard and
questioned writing be of a similar type.
if a check fraud is being investigated, genuine
cancelled checks should be procured;
if an account entry is challenged, other entries
should be obtained as standards; or
if the authorship of an anonymous letter is to
be established, letters or pages of writing
should be gathered for purposes of
comparison. The reasons for such choice will
be considered briefly

24. The Relative Date of
Execution
A person's writing undergoes gradual changes
just as does his appearance.
So, material written two or three years before or
after the disputed writing usually proves to be
satisfactory standards; but as the lapse of years
between the execution of the standard and
questioned material becomes greater, there may
be a tendency for the standards to be less
satisfactory.
The rate of change differs with each individual
and is dependent upon the amount of writing he
executes, his age, and his mental and physical

25. Conditions Under Which
Writing was Executed
Theconditionsunderwhichwritingisexecuted
mayaffectitsvalueascomparisonstandards.
Specimensaffectedbyunusualwriting
conditions,shouldneverbedependedupon
exclusivelyforcomparisonwithwritingexecuted
undermorenormalconditions.
Haste,lackofcare,oranunnaturalwriting
position-suchasrestingthepaperontheknee-
introduceswritingvariationswhichmaymakethe
specimensentirelyunsuitedforcomparisonwith
morecarefullywrittenmaterial.

26. Writing Instruments and
Paper
The type of writing instrument used in
executing a given specimen may have an
influence upon its subsequent comparison with
other specimens.
for example, steel to fountain or fine to coarse-
or in the grade of pencil -such as from hard to
soft-may also introduce writing variations.
The composition, size, shape, and ruling of
paper may influence the writing specimens to
some extent.

27. PROCEDURE FOR
OBTAINING COLLECTED
STANDARDS
DO
1. Obtain at least 15 to 20 genuine signatures.
2. Procure ink signatures for comparison with
questioned ink specimens; pencil standards
for comparson with questioned pencil
specimens.
3. Secure, when available, genuine signatures
used for the same purpose as the questioned.
(i.e., if a check signature is questioned, best
standards are genuine check signatures.)

28. 4.Supplementstandardswithsignaturesusedfordifferent
purposes.
5.Procurestandardsignaturesofapproximatelythesame
dateasthedisputed(preferablywithin5yearsofthe
questioned).
6.Ifquestionedsignaturewaswrittenunderunusual
conditions,attempttoobtainsomespecimenswhichwere
executedundersimilarconditions.
7.Secure,wheneverpossible,somesignatureswrittenon
formsorpaperofthesamesizeasquestioneddocument.

29. DO NOT
1.Donotrelyononlyoneortwostandardsignatures.
2.Donotdependentirelyuponothertypesofwriting
specimens.
3.Donotrelyexclusivelyuponsignaturesusedforvery
differentpurposesthanthequestioned.(e.g.,hastilywritten
receiptsignaturesforcomparisonwithquestioned
signaturesonlegaldocuments.)
4.Donotsubmitonlypencilsignaturesforcomparisonwith
questionedinkwritingoronlyinksignaturesforcomparison
withquestionedpencilspecimens.

30. 5.Donotusesignatureswrittenduring
extremeillnessorintoxication,exceptfor
comparisonwithspecimensexecutedunder
similarconditions.
6.Donotdependonrecentlywritten
signaturesforcomparisonwithspecimens
written20or30yearsago.
7.Donotcollectonlytherecommended
minimumnumberofsignaturesifmore
specimensareavailable

31. Dictation of Material
Dictatetexttothewriterwithoutsuggestions
pertainingtothearrangementofmaterial,spelling,
punctuation,capitalization,orotherpointswhich
mightcauseawritertodisguiseormodifyhis
naturalwritinghabits.
Fasterandcontinuousdictationmaypreventa
suspectfromfurnishingonlyhisbestorneatest
writingandavoidswritertofrequentstopsand

32. Selection of Text
The texts for request standards may consist of
three types of subject matter:
the contents of the questioned document;
some similar material which contains many of
the
same words, phrases, and letter
combinations; or
dictation of a set or standardized form which
includes all the letters of the alphabet and a
number of the more commonly used words.

33. FAQ
What is line quality
What is emellishments in writing
What is rhythm in making of writing

34. References
O. Hilton, Scientific Examination of Questioned
Documents, CRC Press, Boca Raton (1982).
R.N. Morris, Forensic Handwriting
Identification: Fundamental Concepts and
Principles, Academic Press, London (2000).
E. David, The Scientific Examination of
Documents –Methods and Techniques, 2
nd
Edition, Taylor & Francis, Hants (1997).
www.google.com/images/handwritingcharacter
istics