Riley, J.
The common question in these prosecutions for first-degree criminal sexual conduct, MCL 750.520b; MSA 28.788(2), is whether the trial courts erred so as to require reversal in allowing the examining physicians to testify that the complainants had been sexually assaulted. In
Mays,
we find the foundation sufficient; however, because the foundation for the testimony was inadequate in
Smith,
the testimony was improperly admitted. Therefore, we reverse the decisions of the Court of Appeals in both cases.
FACTS AND PROCEDURAL HISTORY
People v Smith
Defendant was convicted by a jury, along with his codefendant, of first-degree criminal sexual conduct, MCL 750.520b(l)(d)(ii); MSA 28.788(2)(l)(d)(ii) (sexual penetration while aided or abetted by another, using force or coercion to accomplish the penetration). The complainant testified that she had gone for a ride with defendant and the codefendant on the evening of February 21, 1981. The vehicle became stuck and defendant
made sexual advances. She cried and asked him to stop. According to complainant, the codefendant held her down while defendant engaged in oral sex with her. Thereafter, both men engaged in sexual intercourse with her.
At trial, defendant testified that the sexual activities were consensual.
The testimony which is the subject of this appeal was given by Dr. Clair McDougall, the physician who examined the complainant shortly after the incident. Dr. McDougall, an obstetrician/gynecologist, also happened to have been the complainant’s physician since 1979. Dr. McDougall testified that he had conducted approximately five examinations of alleged sexual assault victims per year over the past ten years. He testified that although he found no physical evidence of an assault, in his opinion complainant had been sexually assaulted.
This opinion was based on the complainant’s emotional state, described by Dr. McDougall as "agitated, extremely nervous” and "shaking,” and her "history as she described it. . . .”
Q.
Are you talking about her — her history as you knew it?
On the following day of trial, defendant objected to the testimony and sought a curative instruction, claiming error on the basis of
People v McGillen #2,
392 Mich 278; 220 NW2d 689 (1974). The trial court refused to give a curative instruction,
relying on
People v Gerald Wells,
102 Mich App 558; 302 NW2d 232 (1980), lv den 417 Mich 916 (1983). As in
Gerald Wells,
the trial court found
McGillen #2
factually distinguishable. Following the Court of Appeals affirmance of the trial court’s reasoning and decision,
People v Smith, People v Buse,
unpublished opinion per curiam of the Court of Appeals, decided June 20, 1984 (Docket Nos. 66807, 66808), we granted defendant’s application for leave to appeal. 422 Mich 936 (1985).
People v Mays
Following a jury trial, defendant Mays was convicted of two counts of first-degree criminal sexual conduct, MCL 750.520b(l)(e); MSA 28.788(2)(l)(e) (sexual penetration while armed with a weapon).
The complainant testified that defendant accosted her at gunpoint in the parking lot of her apartment complex in the early morning hours of De
cember 5, 1981. Defendant ordered complainant into her car and she drove to a cemetery, at which time he forced vaginal and oral intercourse upon her. Defendant then ordered her into the trunk of the car and drove to another location where, again at gunpoint, he forced her to have vaginal and rectal intercourse.
Defendant testified that his sexual conduct with complainant was consensual.
Dr. Michael Peikert examined the victim, in his capacity as an emergency department physician, shortly after the incident. Dr. Peikert estimated that he had examined approximately fifty alleged victims of sexual assault. The doctor testified that complainant told him that a man with a gun had slapped her and forced her to have oral, rectal, and genital sex. He further testified that she appeared to have been crying, but was basically calm. Finally, his examination revealed a red mark on her face and she had some small abrasions at the entrance of her vagina.
The prosecutor then asked:
Q. [Prosecuting
Attorney]: All right. Using your background, your education, your experience, her demeanor, her clothing, her attitude, and what you saw in your examination, all of the things that you know about this person, using all of your experience, did you form an opinion as to whether or not there was sexual penetration against her will?
Citing
McGillen #2
and
People v Izzo,
90 Mich App 727; 282 NW2d 10 (1979), lv den 407 Mich 935 (1979), defendant objected, claiming that the doctor was not qualified to give an opinion that the complainant had been penetrated against her will and that this testimony invaded the province of the jury. The trial court allowed the testimony,
relying on
Gerald Wells, supra,
and
People v LaPorte,
103 Mich App 444; 303 NW2d 222 (1981), and distinguishing
McGillen #2
and
Izzo.
Direct examination of the doctor continued:
The Court:
You can go ahead and answer that, Doctor.
[Dr. Peikert]: Yes.
Q. [.Prosecuting
Attorney]: Cah you tell us what that opinion is?
A.
My opinion was that she had been penetrated against her will.
In a split decision, the Court of Appeals reversed:
We hold that an opinion concerning whether a complainant was penetrated against her will must be limited to the doctor’s physical examination. Testimony allegedly based on past experience with sexual assault cases and the emotional state of the patient is lacking in reliable foundation and is beyond the expertise of the physician; it should not be admitted.
Judge Allen dissented, citing
Gerald Wells, supra.
We granted the prosecutor’s application for leave to appeal. 422 Mich 937 (1985).
DISCUSSION
The principles governing the admissibility of expert testimony are set forth in the Michigan Rules of Evidence. The critical inquiry with regard to expert testimony is whether such testimony will aid the factfinder in making the ultimate decision in the case. Thus, MRE 702 provides:
If the court determines that recognized scientific, technical, or other specialized knowledge will
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Riley, J.
The common question in these prosecutions for first-degree criminal sexual conduct, MCL 750.520b; MSA 28.788(2), is whether the trial courts erred so as to require reversal in allowing the examining physicians to testify that the complainants had been sexually assaulted. In
Mays,
we find the foundation sufficient; however, because the foundation for the testimony was inadequate in
Smith,
the testimony was improperly admitted. Therefore, we reverse the decisions of the Court of Appeals in both cases.
FACTS AND PROCEDURAL HISTORY
People v Smith
Defendant was convicted by a jury, along with his codefendant, of first-degree criminal sexual conduct, MCL 750.520b(l)(d)(ii); MSA 28.788(2)(l)(d)(ii) (sexual penetration while aided or abetted by another, using force or coercion to accomplish the penetration). The complainant testified that she had gone for a ride with defendant and the codefendant on the evening of February 21, 1981. The vehicle became stuck and defendant
made sexual advances. She cried and asked him to stop. According to complainant, the codefendant held her down while defendant engaged in oral sex with her. Thereafter, both men engaged in sexual intercourse with her.
At trial, defendant testified that the sexual activities were consensual.
The testimony which is the subject of this appeal was given by Dr. Clair McDougall, the physician who examined the complainant shortly after the incident. Dr. McDougall, an obstetrician/gynecologist, also happened to have been the complainant’s physician since 1979. Dr. McDougall testified that he had conducted approximately five examinations of alleged sexual assault victims per year over the past ten years. He testified that although he found no physical evidence of an assault, in his opinion complainant had been sexually assaulted.
This opinion was based on the complainant’s emotional state, described by Dr. McDougall as "agitated, extremely nervous” and "shaking,” and her "history as she described it. . . .”
Q.
Are you talking about her — her history as you knew it?
On the following day of trial, defendant objected to the testimony and sought a curative instruction, claiming error on the basis of
People v McGillen #2,
392 Mich 278; 220 NW2d 689 (1974). The trial court refused to give a curative instruction,
relying on
People v Gerald Wells,
102 Mich App 558; 302 NW2d 232 (1980), lv den 417 Mich 916 (1983). As in
Gerald Wells,
the trial court found
McGillen #2
factually distinguishable. Following the Court of Appeals affirmance of the trial court’s reasoning and decision,
People v Smith, People v Buse,
unpublished opinion per curiam of the Court of Appeals, decided June 20, 1984 (Docket Nos. 66807, 66808), we granted defendant’s application for leave to appeal. 422 Mich 936 (1985).
People v Mays
Following a jury trial, defendant Mays was convicted of two counts of first-degree criminal sexual conduct, MCL 750.520b(l)(e); MSA 28.788(2)(l)(e) (sexual penetration while armed with a weapon).
The complainant testified that defendant accosted her at gunpoint in the parking lot of her apartment complex in the early morning hours of De
cember 5, 1981. Defendant ordered complainant into her car and she drove to a cemetery, at which time he forced vaginal and oral intercourse upon her. Defendant then ordered her into the trunk of the car and drove to another location where, again at gunpoint, he forced her to have vaginal and rectal intercourse.
Defendant testified that his sexual conduct with complainant was consensual.
Dr. Michael Peikert examined the victim, in his capacity as an emergency department physician, shortly after the incident. Dr. Peikert estimated that he had examined approximately fifty alleged victims of sexual assault. The doctor testified that complainant told him that a man with a gun had slapped her and forced her to have oral, rectal, and genital sex. He further testified that she appeared to have been crying, but was basically calm. Finally, his examination revealed a red mark on her face and she had some small abrasions at the entrance of her vagina.
The prosecutor then asked:
Q. [Prosecuting
Attorney]: All right. Using your background, your education, your experience, her demeanor, her clothing, her attitude, and what you saw in your examination, all of the things that you know about this person, using all of your experience, did you form an opinion as to whether or not there was sexual penetration against her will?
Citing
McGillen #2
and
People v Izzo,
90 Mich App 727; 282 NW2d 10 (1979), lv den 407 Mich 935 (1979), defendant objected, claiming that the doctor was not qualified to give an opinion that the complainant had been penetrated against her will and that this testimony invaded the province of the jury. The trial court allowed the testimony,
relying on
Gerald Wells, supra,
and
People v LaPorte,
103 Mich App 444; 303 NW2d 222 (1981), and distinguishing
McGillen #2
and
Izzo.
Direct examination of the doctor continued:
The Court:
You can go ahead and answer that, Doctor.
[Dr. Peikert]: Yes.
Q. [.Prosecuting
Attorney]: Cah you tell us what that opinion is?
A.
My opinion was that she had been penetrated against her will.
In a split decision, the Court of Appeals reversed:
We hold that an opinion concerning whether a complainant was penetrated against her will must be limited to the doctor’s physical examination. Testimony allegedly based on past experience with sexual assault cases and the emotional state of the patient is lacking in reliable foundation and is beyond the expertise of the physician; it should not be admitted.
Judge Allen dissented, citing
Gerald Wells, supra.
We granted the prosecutor’s application for leave to appeal. 422 Mich 937 (1985).
DISCUSSION
The principles governing the admissibility of expert testimony are set forth in the Michigan Rules of Evidence. The critical inquiry with regard to expert testimony is whether such testimony will aid the factfinder in making the ultimate decision in the case. Thus, MRE 702 provides:
If the court determines that recognized scientific, technical, or 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.
The determination of when such testimony is admissible lies within the discretion of the trial court and will vary according to the area at issue and the particular facts of the case. Generally, the testimony must assist the jury in understanding the evidence or the factual issues, and the witness must have sufficient qualifications "as to make it appear that his opinion or inference will probably aid the trier in the search for truth.” McCormick, Evidence (3d ed), § 13, p 33. In determining whether an expert’s testimony will assist the trier of fact, the Advisory Committee Note to FRE 702 states:
Whether the situation is a proper one for the use of expert testimony is to be determined on the basis of assisting the trier. "There is no more certain test for determining when experts may be used than the common sense inquiry whether the untrained layman would be qualified to determine intelligently and to the best possible degree the particular issue without enlightenment from those having a specialized understanding of the subject involved in the dispute.” Ladd, Expert Testimony, 5 Van LR 414, 418 (1952).
It is further well-established that expert opinion testimony will not be excluded simply because it concerns the ultimate issue:
Testimony in the form of an opinion or inference otherwise admissible is not objectionable because it embraces an ultimate issue to be decided by the trier of fact. [MRE 704.]
As the rule itself makes clear, however, such testimony must be "otherwise admissible,” thereby implicating, inter alia, the "helpfulness” requirement.
The sexual assault cases in which expert testimony has been at issue illustrate the above principles. The leading case is
People v McGillen #2, supra.
There, we emphasized the "helpfulness” requirement:
[T]he examining physician in a rape case is a proper witness
as long as his testimony may assist the jury
in their determination of the existence of either of two critical elements of the offense charged, (1) penetration itself and (2) penetration against the will of the victim.
[Id.,
p 284. Emphasis added.]
In
McGillen #2,
a statutory rape case, the examining physician’s testimony was not admissible on either element. As to the second element— penetration against the will of the victim — no testimony was relevant because this was not an element of the crime of statutory rape.
Id.
Thus, such testimony would have been of no help to the jury.
Regarding the first element — penetration—we noted that the examining physician may testify to the victim’s physical condition:
In
People v Kirtdoll,
391 Mich 370, 394-395; 217 NW2d 37 (1974) this Court stated:
"Dr. Taver was an appropriately indorsed witness as the attending physician in a rape case. Proof of rape requires the showing of penetration.
People v Inman,
315 Mich 456; 24 NW2d 176 (1946). And in addition, proof of rape requires the
showing of use of force where the woman is past the age of consent.
Don Moran v People,
25 Mich 356; 12 Am Rep 283 (1872). The attending physician just after the commission of the rape is normally the best witness to these facts. In fact attending physicians have even been designated as res gestae witnesses.
People v Dickinson,
2 Mich App 646; 141 NW2d 360 (1966);
People v Kelly,
30 Mich App 154; 186 NW2d 72 (1971);
People v Crable,
33 Mich App 254; 189 NW2d 740 (1971).
"The physician attending the victim immediately after a rape case is in a position to testify to the victim’s
condition
beyond what the record may show or beyond what is admissible under the business entry statute. Certainly the physician’s posture in the case is quite different from a bookkeeper, for example, who may only be entering credits and debits in the normal course of business.” (Emphasis added.)
[McGillen #2,
pp 283-284.]
For example, we opined that the doctor could have testified to whether "the complaining witness still had an intact hymen at the time of his examination. ... if [she had] claim[ed] to have had an intact hymen prior to the alleged act.”
Id.,
p 285. Apparently, she did not so claim. There was, in fact, no testimony of any physical findings of penetration. Further, under the peculiar factual situation of
McGillen #2
— i.e., the examination was not performed until over two weeks after the alleged incident, within which two week interval the victim was, by her testimony, again raped — it is doubtful, if not impossible, that the doctor could have given any meaningful opinion testimony based on the victim’s physical condition. Thus, we observed;
The doctor in this case could not testify as to whether or not the prosecutrix had intercourse on the date in question. Medical science has not yet
advanced to this point under these circumstances.
[McGillen #2,
p 285.]
Nonetheless, the doctor in
McGillen #2
testified that his "findings” were "consistent [with] the history” given by the victim.
Id.,
p 283. Considering the lack of any objective findings, this conclusion was nothing more than the doctor’s opinion that the victim had told the truth.
When read in light of the applicable principles governing expert testimony, the
McGillen #2
doctor’s testimony was objectionable because his opinion was based solely on what the victim had told him. In the absence of any evidence qualifying him as an expert in assessing credibility, his opinion lacked a reliable foundation. Since the jury was in just as good a position to evaluate the victim’s testimony as he, the doctor’s opinion was superfluous.
Subsequent to
McGillen #2,
the Court of Appeals decided several cases in which the admissibility of examining physicians’ testimony was challenged. Some panels found such testimony inadmissible, relying on
McGillen #2.
Others, however, on which the prosecutors here rely, distinguished
McGillen #2,
and affirmed the trial courts’ decisions to admit the testimony.
The latter line of cases began with
People v Gerald Wells, supra.
There the Court of Appeals characterized the physician’s testimony as follows:
In the present case, the defendant admitted having sexual intercourse with the complainant. Therefore, the only element to which the examining physician could testify is penetration against
the will of the victim. This is exactly what occurred. Dr. Adler testified that based upon his physical findings in examining the victim, the history received from the patient, the emotional condition of the patient, and his many years of experience and many cases of examining victims of alleged sexual assaults, it was his opinion that this was a legitimate case of sexual assault.
[Id.,
p 562.]
Because the doctor "did not testify that he believed that the defendant raped the complainant at a specific time and/or place,” the Court found that
McGillen #2
did not preclude his testimony.
Id.
Other panels have relied on the factors mentioned in
Gerald Wells,
(physical findings, history given by the victim, victim’s emotional state, and doctor’s experience in examining alleged victims of sexual assault) to support their decisions affirming admissibility of the testimony.
Defendant Smith argues that
Gerald Wells
is irreconcilable with
McGillen #2,
suggesting that
the following language of
McGillen #2
sets forth certain inflexible rules regarding examining physicians’ testimony in all sexual assault cases.
An expert opinion1 of the examining physician on this element [penetration against the victim’s will] is then generally beyond the scope of admissible expert testimony.
It is also noted that in no event is the doctor permitted to lend his expert opinion testimony as to the crucial issue of whether or not the prosecutrix was actually raped3 at a specific time and place.
1 It would be only the doctor’s opinion that would be inadmissible. He could stfll testify as to any physical conditions (i.e., bruises, bleeding, lacerations, etc.) which he found upon examination.
[Id.,
p 284.]
3 Rape is a crime, defined by law, with specific elements comprising the offense. Most crucial of them is lack of consent of the victim. To this element the doctor could not testify. [Emphasis in original.
Id.,
p 285.]
Reading the applicable language in isolation,
McGillen #2
seems to do just that, as Justice Coleman noted in her dissent, p 288. However, we would emphasize that the quoted language is dicta, as the doctor there did
not
testify that the defendant had raped the victim at a specific time or place, or that she did not consent. Further, to the extent that this language suggests that an opinion regarding an ultimate issue is never permitted, such a blanket prohibition would clearly conflict with MRE 704.
We are persuaded, therefore, that
Gerald Wells
and its progeny are consistent with the basic principles of
McGillen #2.
Decisions on admissibility must, of course, be made in the context of the particular case. The party proffering the expert’s testimony must persuade the court that the expert possesses specialized knowledge which will aid the trier of fact in understanding the evidence or determining a fact in issue. MRE 702.
SUMMARY
Having carefully reviewed the testimony in
Smith,
we agree with defendant that Dr. McDou-gall’s testimony should not have been admitted. His opinion that the complainant had been sexually assaulted was based, not on any findings within the realm of his medical capabilities or expertise as an obstetrician/gynecologist, but, rather, on the emotional state of, and the history given by, the complainant.
_.
Like
McGillen #2,
this opinion was, in effect, an assessment of the victim’s credibility. To the extent that the doctor’s opinion was based on the complainant’s emotional state, the record does not support a finding that Dr. McDougall possessed specialized knowledge which would enable him to draw inferences from that evidence. The jury had heard this evidence as well as the victim’s testimony, and Dr. McDougall’s opinion was merely an inadmissible lay witness’ opinion on the believability of the complainant’s story. MRE 701.
His opinion that the victim had been sexually assaulted was, therefore, erroneously admitted. Further, because the defense was consent, credibility of the victim and defendant was the crucial issue. For this reason, the error was such that reversal is required.
Finally, we note that defendant
Smith
has also claimed that the Court of Appeals erred in affirming the trial court’s refusal to instruct that consent is an affirmative defense to the charge of criminal sexual conduct. However, inasmuch as we are in accord with the Court of Appeals disposition of this issue, it is unnecessary, in light of our reversal, that we address it here.
Mays
presents a closer question. In that case, the doctor testified that the physical examination revealed abrasions at the entrance of the complainant’s vagina, in addition to expressing his opinion that she had been penetrated against her will. The Court of Appeals found that "an opinion concerning whether a complainant was penetrated against her will [could be based on] the doctor’s
physical examination.” However, since the prosecutor had suggested that the doctor could consider
other
factors (i.e., his "past experience with sexual assault cases and the emotional state of the patient,”
id.)
in formulating an opinion, the Court would have the opinion disregarded entirely.
With this conclusion we do not agree. Although opinion testimony based on the doctor’s "past experience” and his observance of the "emotional state of the patient” did not in this case support an expert opinion standing alone, it does not follow that the doctor’s testimony regarding forceful penetration based on his observation of the physical evidence was inadmissible.
Although the question was inartfully phrased, particularly in light of the fact that "penetration against the will of the victim” is not an element of the offense of criminal sexual conduct,
we cannot
agree that error resulted. The doctor’s opinion was grounded upon objective evidence;
cross-examination was available, and was used, to expose its true basis. The use of force or coercion is relevant in this case in light of defendant’s claim that the acts were consensual; therefore, the expert’s opinion on forcible penetration was proper so long as it was based upon a proper factual foundation. Accordingly, we reverse the decision of the Court of Appeals and reinstate the jury’s verdict.
CONCLUSION
Thus, we reverse the Court of Appeals affir-mance of defendant Smith’s conviction, and we remand for proceedings consistent with this opinion.
We reverse the Court of Appeals decision as to defendant Mays and reinstate defendant’s convictions.
Williams, C.J., and Levin, Brickley, Cav-anagh, Boyle, and Archer, JJ., concurred with Riley, J.