About | HeinOnline Law Journal Library | HeinOnline Law Journal Library | HeinOnline

8 Psych. Inj. & L. 1 (2015)

handle is hein.journals/psyinjl8 and id is 1 raw text is: Psychol. Inj. and Law (2015) 8:1-10
DOI 10.1007/s12207-015-9213-7

What Can the Rules of Evidence Teach Us About Writing
Forensic Reports?
Michael Karson
Received: 2 September 2014 /Accepted: 11 January 2015 /Published online: 28 January 2015
© Springer Science+Business Media New York 2015

Abstract The rules of evidence codify the legal system's
evolved wisdom about fairness and validity. Especially on
point are the rules pertaining to relevance (Federal Rules of
Evidence (FRE) 401), expert testimony (FRE 702),
questioning witnesses (FRE 611), prejudice (FRE 403), hear-
say (FRE 802), and character evidence (FRE 404). This paper
assays to improve our reports and align them with the legal
culture, regardless of whether this is needed to make our re-
ports admissible, and to take advantage of what jurisprudence
knows about weighing and presenting evidence. The paper
reviews the most salient courtroom evidentiary rules, along
with their associated courtroom objections, and discusses their
implications for report writing. Understanding our legal sys-
tem's treatment of evidence can improve our own.
Keywords Report writing - Rules of evidence
When writing up the results of their assessments, psycholo-
gists face numerous dilemmas and puzzles. We are exhorted to
be both comprehensive (Fulero & Wrightsman, 2009) and
germane (Grisso, 2010) in selecting data to report. We should
be convincing (Mayman, 1959), but we should not use rhe-
torical methods of enhancing this, such as relying on creden-
tials, ipse dixits, and appeals to emotion (Karson & Nadkarni,
2013). Reports should be long enough to convey thorough-
ness but short enough to be readable. We have to balance
competing views of psychological processes; for example,
with respect to memory, the best evidence of whether child
abuse occurred decades earlier is the person's recollection, but
anything the person recalls of a crime from last week is highly
M. Karson (2W)
Graduate School of Professional Psychology, University of Denver,
GSPP, 2460 S. Vine St., Denver, CO 80208, USA
e-mail: nkarson@du.edu

suspect. In many jurisdictions, we are required to diagnose the
evaluee while keeping in mind that diagnosis is only tangen-
tially related to the legal question (APA, 2000). Often, we are
reasonably capable of assessing what people usually are like
(Grice, 2004), but it is more difficult to ascertain what they
were like on a particular occasion, which more usually relates
to the legal question at hand.
In some ways, a psychological evaluation is like a legal
hearing or a trial. A legal question is in dispute; the question
is usually broken down into steps (the negligent act at issue
and its effects, the elements of a crime, or the factors that
define competency); and evidence is collected relevant to the
various components. In this analogy, the report is in some
ways like the closing argument of the trial (Karson &
Nadkarni, 2013), in which the argument ties the evidence to
the steps involved and logical argument is made for a specific
outcome or conclusion. The recommended outcome may be
legal, as in a finding on the ultimate question (with all the
complications of doing so, Slobogin, 1989), or factual, as in
a finding, for example, that an evaluee received a particular
score on a particular actuarial, or that a defendant believed
psychotically that he was entering his own house, or that a
testator understood the contents of her will when she signed it.
In this analogy, psychologists can be equated to attorneys
because they are making their case with the best evidence at
hand, and readers are like triers of fact, the judge (in a bench
trial or hearing) or the jury. Psychologists, of course, should
not have a preferred outcome predetermined by their clients'
wishes, but by the time they have completed their assessment,
they will have developed unbiased conclusions that their re-
ports promote. Despite the analogy being made, another dif-
ference between psychology and law is that our recommended
outcome will often be qualified by a degree ofuncertainty. For
example, we can argue that it is hard to discern whether an
evaluee has a reasonable expectation ofbenefitting from treat-
ment (Karson & Nadkarni, 2013). Attorneys usually argue

e Springer

What Is HeinOnline?

HeinOnline is a subscription-based resource containing thousands of academic and legal journals from inception; complete coverage of government documents such as U.S. Statutes at Large, U.S. Code, Federal Register, Code of Federal Regulations, U.S. Reports, and much more. Documents are image-based, fully searchable PDFs with the authority of print combined with the accessibility of a user-friendly and powerful database. For more information, request a quote or trial for your organization below.



Short-term subscription options include 24 hours, 48 hours, or 1 week to HeinOnline.

Contact us for annual subscription options:

Already a HeinOnline Subscriber?

profiles profiles most