Thе sole issue in this appeal is whether the trial court abused its discretion when it permitted a psychologist to testify on behalf of a plaintiff in a personal injury case *784 as to the cause of a brain injury. 1 Finding the trial court did not abuse its discretion in this regard, we affirm.
Background
In May, 2004, Henry Bennett, while operating a roll-off container truck for Schu-pan & Sons, Inc. (referred to collectively as “Bennett”), rear-ended John Richmond’s vehicle. Bennett’s truck weighed 42,000 pounds; Richmond was driving a van. In December, 2005, Richmond and his wife sued Bennett for injuries Richmond sustained in the collision to his neck and back. 2
In October, 2006, pursuant to a referral by his attorney, Richmond underwent a neuropsyсhological evaluation with Dr. Sheridan McCabe, a psychologist. Richmond had been experiencing headaches and memory loss since the accident but had not been diagnosed with a brain injury. Dr. McCabe reviewed Richmond’s medical records and Richmond’s deposition; he also interviewed Richmond and his wife and administered a battery of neuropsychological tests to Richmond. As a result of the evaluation, Dr. McCabe testified that Richmond had “experienced a traumatic brain injury in the accident.” Appellant’s App. 105. This testimony forms the basis of this appeal.
Bennett objected to Dr. McCabe as an expert witness on three separate occasions during this litigation, each time challenging the admissibility of Dr. McCabe’s testimony that Richmond experienced a traumatic brain injury in the accident. Bennett first filed a pretrial motion to exclude Dr. McCabe as an expert witness. The trial court denied Bennett’s motion. 3 Bennett again objected to Dr. McCabe’s testimony at trial, which the trial court overruled. Then, after the jury returned a $200,000 judgment in favor of Richmond, Bennett filed a motion to correct error on the basis that Dr. McCabe should not have been permitted to testify. The trial court also denied that motion.
Bennett appealed, contending that the trial court erred when it permitted Dr. McCabe to testify that Richmond had sustained a traumatic brain injury in the accident.
4
The Court of Appeals agreed and reversed and remanded the case for a new trial.
Bennett v. Richmond,
Richmond sought, and we granted, transfer,
Bennett v. Richmond,
Discussion
I
While there is little dispute that a psychologist may testify as to the existence of
*785
a brain injury or the condition of the brain in general, the specific issue in this case— whether psychologists or neuropsycholo-gists
6
may testify as to the
cause
of a brain injury — is one that has divided jurisdictions.
Hutchison v. Am. Family Mut Ins. Co.,
For its part, the Court of Appeals in this case held that psychologists are not per se unqualified to opine on issues of medical causation, but rather, under Indiana Evidence Rule 702, they may be qualified to give such an opinion based on certain knowledge, skill, experience, training, or education.
Bennett,
Although we disagree with the result reached by the Court of Appeals, we do agree with its general approach in this case, and in doing so, align ourselves with
*786
those jurisdictions analyzing the issue of whether a psychologist may testify in this regard under the various Rule 702 analogs.
See, e.g., Davison,
II
Bennett objected to Dr. McCabe’s testimony under Rule 702 on the basis that Dr. McCabe was “not qualified to render an opinion regarding a medical diagnosis of a brain injury,” Appellant’s App. 104, which, as noted in footnote 4,
supra,
we view as a challenge to Dr. McCabe’s testimony as to the cause of Richmond’s brain injury. “A trial court’s determination regarding the admissibility of expert testimony under Rule 702 is a matter within its broad discretion and will be reversed only for abuse of that discretion.”
TRW Vehicle Safety Sys., Inc. v. Moore,
The trial court is considered the gatekeeper for the admissibility of expert opinion evidence under Rule 702.
Doe v. Shults-Lewis Child & Family Sens., Inc.,
(a) If scientific, technical, оr other specialized knowledge will assist the trier of fact to understand the evidence or to determine a fact in issue, a witness qualified as an expert by knowledge, skill, experience, training, or education, may testify thereto in the form of an opinion or otherwise.
(b) Expert scientific testimony is admissible only if the court is satisfied that the scientific principles upon which the expert testimony rests are reliable.
Ind. Evidence Rule 702. “By requiring trial courts to be satisfied that expert opinions will assist the fact-finder and that the underlying scientific principles are reliable, Rule 702 guides the admission of expert scientific tеstimony.”
Sears Roebuck & Co. v. Manvilov,
A
With regard to his qualifications, Dr. McCabe obtained a Masters degree in General Psychology in 1956 and a Ph.D. in Counseling Psychology in 1958. 9 He taught in the psychology department at the University of Portland from 1958 to 1967 and taught courses in performing psychological assessments at the University of Notre Dame from 1967-1997. Dr. McCabe served as a psychological consultant for Elkhart General Hospital. He has been in clinical practice since 1981, in which he primarily performs psychological assessments. He has continued his education by attending professional workshops specializing in forensic applications of psychology, which “touched on subjects that relate to evaluation of traumatic brain injuries.” Appellant’s App. 69. Dr. McCabe also testified that he has had patients referred to him by medical doctors. Specifically, two neurologists referred cases to him for “specifiс aspects of brain behavior relationship questions,” id. at 70, and other general practitioners referred cases to him for insight into the “relationship between the presenting psychological problems and ... underlying medical issues,” id.
With the assistance of a video, Dr. McCabe testified extensively about the physiological aspects of the brain and how a closed head injury 10 might occur from a rotational impact or whiplash motion. He explained that when the
head is forced either forward and backward or somehow side to side ... the brain, which is the consistency maybe of jello or oatmeal, moves at a different pace than the hard shell of the skull. And as that kind of whiplash-kind of motion occurs, the brain tissues are dragged across those bony protuberances and that’s the source of the difficulty in many closed head injuries.
Id. at 79. Dysfunction, he explained, may result from this rotational motion.
Dr. McCabe also thoroughly described the methodology he used to reach his conclusion that the accident caused Richmond’s brain injury. He interviewed both Richmond and his wife, reviewed both Richmond’s medical records and deposition, and conducted a series of tests. Dr. McCabe drew conclusions from each of the tests he performed on Richmond. From the Wechsler Adult Intelligence Scale-Ill, which he explained was a “widely used test, almost universal” and “very good from a scientific point of view,” id. at 88, he noted a disparity between Richmond’s verbal and performance tests that he attributed to “some sort of interference with his cognitive processing that [he called] kind of cognitive inefficiency,” id. at 90 (emphasis omitted). From the Wechsler Memory Scale, “another widely used clinical memory test,” id. at 90, Dr. McCabe also noted a pattern of discrepancy or inefficiency that led him to conclude that there were “difficulties ... getting in the way of [Richmond’s] smooth memory function,” id. at 90. Lastly, from the Halstead Neuropsychological Test Battery, again “a very widely used battery,” id. at 91, Dr. *788 McCabe concluded that Richmond’s impairment index suggested that he had “mild to moderate brain damage,” id. at 91-92. Dr. McCabe summarized his results and conclusions as follows:
So we put all this information together and relate it to the facts of the injury and the manifestation in his life of these growing cognitive processing difficulties. And that’s how I arrived at the hypothesis that I did; namely, that in the course of this rear-ending accident, he sustained what we saw in that video: diffuse axonal injury; that is to say, that kind of motion to the head caused damage to the connections between the cells of the brain through the axons. They were sufficiently messed up to provide him with these processing problems that he has manifested — by the time I saw him two years later.
Id. at 92.
Over Bennett’s objection, Dr. McCabe then testified that it was his opinion that Richmond “experienced a traumatic brain injury in the accident.” Id. at 105. He explained that “[gjiven the absence of any of the symptoms of this condition prior to the accident, either in his report, the medical record, or the observations of his wife, it seems evident thаt the accident produced the brain injury.” Id. at 105-06. According to Dr. McCabe, Richmond’s experiencing “chronic headaches, a loss of cognitive efficiency, difficulties in information processing, and some adverse personality changes” appeared to be a result of his brain injury. Id. at 106.
B
The Court of Appeals concluded that Dr. McCabe was not qualified under Rule 702 to offer his opinion as to the cause of Richmond’s brain injury. Specifically, it held that a psychologist who is not a medical doctor but is otherwise qualified under Rule 702 to offer expert testimony as to the existence and evaluation of a brain injury is not qualified to offer his or her opinion as its cause without demonstrating some medical expertise in determining the etiology of brain injuries.
Bennett,
We note here that Dr. McCabe’s testimony on causation relates to his opinion as to the existence and evaluation of a brain injury that he in fact was uniquely qualified to offer, especially considering his testimony that brain injuries such as Richmond’s often go undiagnosed by medical professionals for various reasons.
See Bennett,
In any event, we think that the Court of Appeals imposed more stringent requirements on Dr. McCabe than are required under Rule 702. Rule 702 requires that Dr. McCabe demonstrate his knowledge, skill, experience, training, or education in order to be qualified as an expert, and in fact, only one of these characteristics is necessary.
See Kubsch v. State,
Other jurisdictions analyzing this issue under various analogs to our Rule 702 have not required specific qualifications in determining the etiology of brain injuries before allowing psychologists or neuropsy-chologists to testify in this regard. They have allowed experts to testify as to the cause of a brain injury based on qualifications similar to Dr. McCabe’s. In
Hun-toon,
the Supreme Court of Colorado held that a neuropsychologist was qualified to testify that a rear-ending accident caused the plaintiffs brain injury.
Lastly, Bennett argues that the proper qualifications to testify as to the cause of a brain injury are those of a “neuropsychologist,” and because Dr. McCabe has not claimed to be a neuropsychologist and has not presented any credentials identifying himself as a neuropsychologist, his qualifications are distinguishable from those psychologists that were qualified to testify to the medical cause of brain injuries in other cases. But even if we were to require under Rule 702 qualifications similar to those of a neuropsychologist to testify in this manner, our understanding of “neu-ropsychology,”
see
footnote 6,
supra,
as well as the description of that term in cases, leads us to conclude that Dr. McCabe’s practice was in fact related to neuropsychology even though he did not describe himself as a neuropsychologist.
See Huntoon,
We conclude that the trial court did not abuse its discretion in finding that Dr. McCabe was qualified to offer his opinion as to the cause of Richmond’s brain injury.
C
Admissibility under Rule 702 also depends on the reliability of Dr. McCabe’s causation testimony. In making this determination, “the trial court must make a preliminary assessment of whether the reasoning or methodology underlying the testimony is scientifically valid and whether that reasoning or methodology properly can be applied to the facts in issue.”
Shafer & Freeman Lakes Envtl. Conservation Corp. v. Stichnoth,
First, Bennett argues that the scientific basis of Dr. McCabe’s testimony should have been examined through means of a
Daubert
hearing and that the trial court erred in not holding such a hearing.
15
But we note that Bennett never requested that the trial court hold a
Daubert
hearing and never raised an objection in the trial court on this basis. Moreover, the substance of such a hearing was by and large served during the hearing on his pretrial motion to exclude, at which time Bennett offered and the trial court admitted Dr. McCabe’s deposition testimony.
Cf. TRW Vehicle Safety Sys.,
We conclude that the trial court did not abuse its discretion in finding that Dr. McCabe’s testimony was based on reliable scientific principles. Rule 702(b) “directs the trial court to consider the underlying reliability of the general principles involved in the subject matter of the testimony, but it does not require the trial court to re-evaluate and micromanage each subsidiary element of an expert’s testimony within the subject.”
Sears Roebuck,
Related to the reliability of his testimony, the Court of Appeals concluded that even if Dr. McCаbe were qualified to opine as to the cause of Richmond’s brain injury, his testimony lacked probative value because he did not testify regarding the mechanics of the accident or describe the force or speed of the impact.
Bennett,
We conclude that the trial court did not abuse its discretion in finding that Dr. McCabe’s testimony was based on reliable scientific principles that could be applied to the facts at issue.
Conclusion
Our review of the record, read in conjunction with the requirements of Rule 702, leads us to conclude that the trial court did not abuse its discretion in admitting Dr. McCabe’s causation testimony. The trial court extensively and thoughtfully considered the admissibility of Dr. McCabe’s testimony on three separate occasions during this litigation. Mindful that the trial court is afforded broad discretion in these matters, we decline to find any abuse of it. The judgment of the trial court is affirmed.
Notes
. This case involves similar issues to those we address in another case decided today,
Person v. Shipley,
. Richmond also sustained a back injury in the course of his employment in December, 2004, which apparently exacerbated the injuries he had sustained in the May, 2004, accident.
. The trial court also denied Richmond's motion to exclude Dr. David Kareken, a psychologist who had examined Richmond on behalf of Bennett. Bennett, however, did not call Dr. Kareken as a witness at trial.
. Bennett's brief in the Court of Appeals suggests that he also challenges Dr. McCabe’s qualifications to evaluate whethеr Richmond in fact suffers from a brain injury. However, in subsequent filings in that court and during oral argument before this Court, Bennett clarified that he only challenges Dr. McCabe's qualifications to offer an opinion as to the cause of Richmond's brain injury.
. We have been advised that John Richmond passed away in February, 2011, and that an Estate has been opened for the purposes of this case.
. " '[Njeuropsychology’ is a term used by psychologists to selfdesignate themselves as having expertise in diagnosing brain injuries.” Joseph M. Desmond, Admissibility of Neuropsychological Evidence in New Hampshire, N.H. B.J., Winter 2007, at 12, 14.
. Five members of the Supreme Court of Florida in
Grenitz v. Tomlian
agreed that neu-ropsychologists werе not qualified to testify as to the medical cause of organic brain damage, while two members rejected a bright-line rule that neuropsychologists can never testify in this regard.
Compare Grenitz,
. We note that this approach differs from the per se exclusion by the Court of Appeals of nurses' testimony in medicаl malpractice cases on the medical cause of injuries.
See Long v. Methodist Hosp. of Ind., Inc.,
. In his deposition, Dr. McCabe explained that Counseling Psychology was an applied field that involved “working with people who were not psychiatric patients, but rather kind of regular people who had some sort of problem and counseling dealt with that,” and that it involved "the assessment of a patient’s psychological well-being.” Appellant’s App. 235.
. Dr. McCabe explained that a "closed head injury” is one where there is "no open wound to suggest that the head was significantly injured.” Appellant's App. 77.
.
Hannan,
in turn, cites
Brown v. Terre Haute Regional Hospital,
. Dr. McCabe testified in his deposition that traumatic brain injuries do not occur in the absence of some sort of closed head injury.
. Specifically, Dr. McCabe explained in his deposition: "Traumatic brain injury characteristically affects certain kinds of cognitive functioning, not across the board .... because we’re not destroying the cortex. We're destroying connections. Consequently, we look for particular kinds of inefficiency as suggestive of traumatic brain injury.” Appel-lee’s App. 238. "Other kinds of patterns,” Dr. McCabe continued, "would not suggest traumatic brain injury, but rather some other kind of — like a tumor or some other sort of brain injury.” Id. Dr. McCabe also testified at trial that he had rejected other possible causes of Richmond's cognitive inefficiencies through his evaluation, including back injuries, notable life events, anxiety, and depression.
. In his response to a juror question, Dr. McCabe similarly described neuropsychology as "the study of the relationship between the brain and behavior.” Appellant’s App. 184.
. A
"Daubert
hearing” refers to a hearing usually conducted before trial to determine whether proposed expert testimony meets the requirements of Rule 702.
See Black’s Law Dictionary
453 (9th ed. 2009) (providing definitions of
"Daubert
hearing” and
"Daubert
test”).
Daubert
refers to the U.S. Supreme Court’s opinion in
Daubert v. Merrell Dow Pharmaceuticals, Inc.,
. The trial court went on to state in a footnote:
Plaintiffs should consider, however, that they may have trouble in convincing the Court that sound scientific principles exist to allow McCabe, a non-medical doctor, to "diagnose” whether Mr. Richmond sustained a traumatic brain injury as a result of the accident. This is a different question, however, from testifying that persons suffering from traumatic brain injuries exhibit symptoms similar to the ones he observed when examining Mr. Richmond. From the record before the Court, however, the Court will not exclude McCabe's testimony wholesale. The myriad of issues that McCabe might be asked to testify upon may very well include ones outside the bounds of reliable scientific principles upon which he is competent to testify. Conversely, McCabe is undoubtedly competent to testify on some issues. Whether these issues will be enough to convince the trier of fact to award Plaintiffs compensation for a "traumatic brain injury” is another question. The Court will not speculate as to each issue or adopt Defendant's wholesale approach of excluding McCabe as a witness at this time. To do otherwise would amount to "micro-managing” the Plaintiffs' case for them, which the Court will not do.
Appellant’s App. 30 n.3.
