Richard Walker filed this action against the Soo Line Railroad Company (“Soo Line”). He seeks damages for injuries suffered by having been struck by lightning while working in a railroad tower. At trial, Mr. Walker sought to introduce expert testimony to establish that electrical injury could have been the cause of his condition. Much of that testimony was excluded by the district court on the ground that it lacked a scientific basis. The district court also refused to admit testimony from an expert on electrical safety about how lightning could have penetrated the tower in which Mr. Walker was working. The district court allowed testimony from several Soo Line expert witnesses over Mr. Walker’s objection. The jury returned a verdict for Soo Line. We conclude that several portions of the expert testimony excluded by the district court should have been admitted and that their exclusion severely curtailed Mr. Walker’s ability to present his case. We therefore reverse the judgment of the dis *585 trict court and remand the case for a new trial.
I
BACKGROUND
In 1991 Richard Walker was employed by Soo Line as a tower operator. The job required him to direct railroad cars to particular tracks by operating switches in a control tower. On October 24, 1991, Mr. Walker was working the 11 p.m. to 7 a.m. shift at the Bensenville rail yard. He was stationed in Tower A, one of two 75-foot towers in the yard. There was an electrical storm in the area that night. Mr. Walker claims that, at around 3 a.m., he received injuries from a lightning bolt as he was touching switches on his control board. He relates that he experienced chest pain and that his body heated up. Mr. Walker was hospitalized for two days, but returned to work a few weeks later.
In 1995 Mr. Walker brought this action against Soo Line under the Federal Employers’ Liability Act, 45 U.S.C. § 51 et seq. (“FELA”). Initially, he claimed that the lightning strike had affected his hearing. Later, he amended his complaint to allege that the lightning strike had caused him psychological damage and had impaired his ability to work.
Mr. Walker was evaluated by the Electrical Trauma Research Program at the University of Chicago in December 1996. At trial, the district court excluded or limited the testimony of two expert witnesses from that program. One of these experts was Dr. Neil Pliskin, a psychologist who had examined Mr. Walker to determine his functional capability. Dr. Pliskin administered a battery of tests designed to test Mr. Walker’s IQ, his concentration, and other functions. The district court permitted Dr. Pliskin to testify about the results of those tests; it did not permit, however, Dr. Pliskin’s testimony about his evaluation of Mr. Walker’s IQ before the incident or about any decline in his IQ since the incident. The district court excluded this evidence because Dr. Pliskin had not evaluated Mr. Walker before the incident and had relied on an erroneous account of Mr. Walker’s educational history.
The leader of the University of Chicago team, Dr. Mary Capelli-Schellpfeffer, was not allowed to testify at all. Although there was no dispute about Dr. Capelli-Schellpfeffer’s expertise on the subject of electrical trauma, the district court found that she improperly had relied on findings of other members of her team. Specifically, the court found that she had relied on Dr. Pliskin’s findings about Mr. Walker’s pre-injury functioning and excluded that testimony on the ground that it was based on an unreliable foundation. The district court also excluded as unreliable Dr. Ca-pelli-Sehellpfeffer’s testimony that Mr. Walker was suffering from post-traumatic stress disorder because she was not a psychiatrist or psychologist and because her testimony conflicted with Dr. Pliskin’s findings.
Mr. Walker also sought to introduce the testimony of Dr. Martin Uman, an expert on electrical safety and the chairman of the Department of Electrical Engineering at the University of Florida. Dr. Uman would have testified about the different ways by which electricity from lightning could have penetrated Tower A even if the lightning had not struck the tower directly. The district court barred that testimony as too speculative. However, Dr. Uman was allowed to testify in plaintiffs rebuttal case about the grounding and safety of Tower A after one of Soo Line’s witnesses, Frank Denbrock, a safety inspector for Soo Line, testified that he had inspected Tower A and had found that it was properly grounded.
Dr. Adrian Upton was allowed to testify for Soo Line that there was no evidence that Mr. Walker was injured by any electrical trauma in November 1991. The district court also admitted records from Mr. Walker’s treatment at the Madden State *586 Hospital. Mr. Walker received psychiatric treatment there in 1972, 1973 and 1978.
II
DISCUSSION
We review the district court’s evidentiary decisions, including decisions to admit medical expert testimony, for an abuse of discretion.
See General Elec. Co. v. Joiner,
A. Dr. Neil Pliskin
Dr. Pliskin’s qualifications as a professional psychologist are not in dispute. He was allowed to testify about Mr. Walker’s post-incident IQ. To establish that IQ, Dr. Pliskin administered to Mr. Walker a battery of tests.
The district court refused, however, to allow testimony by Dr. Pliskin about Mr. Walker’s functioning prior to the incident. Dr. Pliskin acknowledged in his deposition that he relied in part on Mr. Walker’s educational history in determining his pre-incident IQ. Parts of Mr. Walker’s history, apparently including his educational history, had been reported to Dr. Pliskin by a woman named Vanessa Harris, described by the district court as Mr. Walker’s girlfriend. The parties do not appear to dispute that her statements to Dr. Pliskin were made on behalf of Mr. Walker. The district court found, however, that the educational history on which Dr. Pliskin relied was inaccurate. Dr. Pliskin, according to the court, acknowledged that, if the account of Mr. Walker’s educational history related to him by Harris was inaccurate, that inaccuracy would have affected his opinion on Mr. Walker’s pre-incident IQ. The court also found that Dr. Pliskin was unsure whether electrical trauma would cause the drop in IQ he claimed to have found and that there were many other factors in Mr. Walker’s life that might have caused his reduction in functioning.
Under
Daubert,
the first inquiry that must be undertaken is whether Dr. Pliskin relied upon a proper scientific methodology to determine Mr. Walker’s pre-incident IQ. The record establishes that Dr. Pliskin’s evaluation relied on the medical, educational and professional histories reported by Mr. Walker and Harris, and on his administration of the National Adult Reading Test, a test specifically designed to estimate a person’s IQ before that person suffered a trauma. Medical professionals reasonably may be expected to rely on self-reported patient histories.
See Cooper v. Carl A. Nelson & Co.,
Having determined that Dr. Pliskin’s testimony was based on an acceptable methodology, we must consider whether it would have assisted the jury with a fact at issue. Soo Line argues that Dr. Pliskin’s testimony should have been excluded because he does not state definitively that the electrical trauma caused the drop in Mr. Walker’s IQ. Under FELA, causation is a jury question.
See Scaggs v. Consolidated Rail Corp.,
The district court expressed concern that the jury would not be “sophisticated enough to understand the cross-examination, the attempts by the defendant to bring out that Dr. Pliskin’s opinion is really not as sound as he would give it on direct examination.” The Supreme Court, however, has expressed its confidence in the ability of juries to understand complicated material, and we believe the district court should have allowed the jury to consider Dr. Pliskin’s evidence in this case.
See Daubert,
*588
Of course, as
Daubert
made clear, the trial court must also keep in mind the other rules regarding the admissibility of evidence.
See Daubert,
B. Dr. Mary Capelli-Schellpfeffer
The district court refused to allow any testimony by Dr. Mary Capelli-Schellpfeffer, the head of the clinical team at the University of Chicago that examined and evaluated Mr. Walker. Dr. Capelli-Schellpfeffer concluded, based to a significant extent on her discussions with members of the team, that Mr. Walker had post-traumatic stress disorder and had lost function because of an electrical injury. She was also prepared to testify that it was not unusual for electrical injuries to first manifest themselves long after the electrical trauma that caused them, as Mr. Walker argued his did. The district court determined that Dr. Capelli-Schellpfeffer was not qualified to testify about post-traumatic stress disorder because she was not qualified as a psychiatrist or psychologist. It acknowledged that she was qualified to testify about the effect of electrical trauma on the human body, but still barred her testimony in its entirety.
Although the district court’s statement of its reasons for excluding Dr. Ca-pelli-Schellpfeffer’s testimony are not stated with optimal clarity, it is clear that the wholesale disallowance of this testimony was not an acceptable exercise of discretion. At the outset, we think that it was proper for a physician working in the role that Dr. Capelli-Schellpfeffer held on the diagnostic and evaluation team to rely on the work of her team members in forming her opinion. Medical professionals have long been expected to rely on the opinions of other medical professionals in forming their opinions.
See Birdsell v. United States,
Soo Line argues that Dr. Capelli-Schellpfeffer’s opinion that Mr. Walker suffered from post-traumatic stress disorder is unreliable because she relies primarily on Dr. Pliskin’s work, and Dr. Pliskin
*589
concluded that Mr. Walker did not have post-traumatic stress disorder.- That two different experts reach opposing conclusions from the same information does not render their opinions inadmissible.
See Allapattah Servs., Inc. v. Exxon Corp.,
Nor do we believe that the leader of a clinical medical team must be qualified as an expert in every individual discipline encompassed by the team in order to testify as to the team’s conclusions. The team approach to medical diagnosis and treatment is employed to ensure that all relevant disciplines work together for the good of the patient. The leader of that team is chosen because of her ability to assess accurately the role that each member of the team ought to play and to reconcile, when necessary, competing perspectives. In short, the expertise , of the team leader is the capability to evaluate, in light of the overall picture, the contributions of each member of the team. Here, the district court found Dr. Capelli-Schellpfeffer to be ■an expert on the subject of electrical trauma. As part of that expertise, she naturally would be expected to have expertise on the subject of whether electrical injuries could cause post-traumatic stress disorder. Dr. Capelli-Schellpfeffer is not a psychiatrist and well might not be able to render an opinion about diagnosing post-traumatic stress disorder on the basis of something other than electrical trauma. However, as the leader of a clinical team specializing in electrical injury, who reasonably relied on the expert opinions of specialists who also examined Mr. Walker, her conclusion that Mr. Walker suffered from post-traumatic stress disorder was a professional opinion that the jury had the right to consider.
C. Dr. Martin Uman
Dr. Martin Uman, the chairman of the electrical engineering department at the University of Florida, testified in his deposition about different ways that lightning could have penetrated Tower A. Starting with the assumption that lightning could have hit in any one of several places in the rail yard, Dr. Uman offered testimony of how, from those several places, electricity could have penetrated Tower A. Dr. Uman said that Mr. Walker could have been injured through a direct hit to Tower A, through a hit to the light tower near Tower A, or through a hit to wires in the yard connected to a switch on Mr. Walker’s control board, if Mr. Walker happened to be touching that switch at the time. He also acknowledged that it was possible that lightning could have hit the yard without injuring Mr. Walker in any way. The district court allowed only those portions of Dr. Uman’s testimony that addressed the possible dangers if the tower had been struck directly by lightning; that testimony was only allowed in Mr. Walker’s rebuttal case to contradict the testimony of Soo Line expert Frank Denbrock.
We must conclude that the district court’s decision in restricting Dr. Uman’s testimony cannot stand even under the deferential standard of review. Experts are allowed to posit alternate models to explain their conclusion.
See Cole v. Control Data Corp.,
This testimony could have been helpful even though Dr. Uman cannot say with any certainty where exactly lightning hit the rail yard, if it hit the rail yard at all. Dr. Uman intended to explain to the jury the ramifications of lightning striking at different points in the yard; the jury, based on eyewitness testimony and on any meteorological evidence entered by the parties, could decide whether it thought lightning had in fact hit anywhere in the yard. The questions of whether lightning hit the yard, and if so where, were questions of fact.
See Dallas County v. Commercial Union Assurance Co.,
D. Frank Denbrock
Frank Denbrock, an electrical engineer who has extensive experience in the field of electrical safety, inspected the rail yard in 1997. He testified for Soo Line, over Mr. Walker’s objection about the safety of Tower A. Expert testimony from technical fields is governed by the same concerns and criteria as the admission of medical expert testimony.
See Kumho Tire Co., Ltd. v. Carmichael,
Mr. Walker contends that the district court conducted an inadequate
Daubert
hearing before choosing to admit Denbrock’s testimony. We review de novo “whether the district court properly followed the framework set forth in
Daubert.” United States v. Hall,
On the factual issue of Denbrock’s qualifications, the district court did not abuse its discretion by admitting Denbrock’s testimony. Mr. Walker argues that Denbrock’s testimony should have been excluded because his inspection was inadequate and his conclusions were faulty. Mr. Walker is correct that shoddy preparation by an expert might evidence a lack of professional qualifications on the part of
*591
a proffered witness.
See Ancho,
157 F.Bd at 516-19. We are not prepared to say, however, that the district court’s decision to admit Denbrock’s testimony was an abuse of discretion. Denbrock was offered as an expert on the basis of his work for a power company, where he was responsible for ensuring the safety of its facilities from lightning. Denbrock demonstrated professional experience in the area of electrical safety, and Rule 702 specifically contemplates the admission of testimony by experts whose knowledge is based on experience.
See Kumho Tire,
E.Dr. Adrian Upton
Dr. Adrian Upton is a medical expert witness who testified for Soo Line. He testified about Mr. Walker’s medical condition after reviewing Mr. Walker’s medical records. Mr. Walker argues that Dr. Upton was not qualified to testify on the subject because he did not have sufficient experience in trauma caused by lightning and personally had not examined Mr. Walker.
Dr. Upton’s specialty is the effect of electric current on the human body. There is no dispute as to his medical qualifications. In allowing Dr. Upton to testify, the district court relied upon Dr. Upton’s experience in treating patients with electrical injuries and upon Dr. Upton’s examination of Mr. Walker’s medical records. These factors were a sufficient basis for the district court to find Dr. Upton qualified as an expert witness. The lack of an examination of Mr. Walker does not render Dr. Upton’s testimony inadmissible.
See In re Paoli R.R. Yard PCB Litig.,
F. The Madden State Hospital Records
The district court allowed Soo Line to introduce into evidence Mr. Walker’s records from Madden State Hospital. Soo Line quoted from the records during closing argument. Mr. Walker was a patient on three occasions: in 1972, 1973 and 1978. The portion of the record quoted by Soo Line during closing argument noted that Mr. Walker was admitted in 1972 for six weeks of treatment, and then again in 1978. Mr. Walker argues that the records should not have been admitted because his hospitalization occurred so long before the events at the rail yard that,they could not be relevant to his condition at that time. Nonetheless, Dr. Pliskin, a witness for Mr. Walker, acknowledged at trial that he would have liked to have known about Mr. Walker’s hospital stay when preparing his evaluation of -Mr. Walker’s pre-incident abilities. On this record, we see no reason to disturb the decision of the district court.
G. Harmless Error
Soo Line also submits that any error by the district court in the admission of evidence is harmless. We shall vacate a jury verdict only if error substantially influenced the jury.
See Palmquist v. Sel-
*592
vik,
Conclusion
For the foregoing reasons, the jury verdict is reversed, and the case is remanded for further proceedings consistent with this opinion.
ReveRSed and RemaNded.
Notes
. Mr. Walker also contends that the district court should have allowed Dr. Pliskin to testify about Mr. Walker’s pre-incident IQ because Soo Line opened the door to this topic in its cross-examination of Dr. Pliskin. Because we hold that Dr. Pliskin's testimony should have been allowed as part of Mr. Walker's case-in-chief, we need not address this argument.
. Historically, witnesses were expressly prohibited from testifying about the ultimate issues facing the jury.
See
Fed.R.Evid. 704 advisoiy committee’s note. That prohibition was eliminated in the federal courts by Federal Rule of Evidence 704, which allows such testimony (subject to an exception in criminal cases not relevant here).
See
Fed.R.Evid. 704;
United States v. Baskes,
.There may be cases in which a patient's self-reported history is so patently misleading as to make it unreasonable for an examining physician to place any reliance on it. On this record, however, it is clear that we have no such case before us. Dr. Pliskin’s testimony should not have been excluded under Daubert *588 solely on the ground that his patient's self-reported history contained some inaccuracies.
.
See, e.g., Hose v. Chicago Northwestern Transp. Co.,
