Rilеy J. Cissne seeks discretionary review of his conviction of driving while intoxicated. He contends the District Court erred in admitting testimony about his horizontal gaze nystagmus test results as well as statements he made to the arresting officer. We reverse and remand.
Mr. Cissne was stopped after a police officer saw him make an improper left turn, weave in and out of his lane of traffic and almost strike a guardrail on six or seven occasions. The officer noticed a strong odor of intoxicants about *679 Mr. Cissne's person. Six field sobriety tests were administered: the 1-foot balance test, the finger-to-nose test, the alphabet test, the walk-and-tum test, the finger counting test, and the horizontal gaze nystagmus (HGN) test. 1
Mr. Cissne was unable to perform the 1-foot balance test and, instead of touching his nose with his finger, he touched his forehead with one hand and his lower lip with the other. He had difficulty reciting the alphabet, he failed the walk- and-tum test, was unable to perform the counting test and, based on the officer's testimony at trial, the HGN test results indicated the presence of nystagmus.
Mr. Cissne was placed under arrest and taken to the police station. Throughout the officer's investigation, Mr. Cissne repeatedly threatened to sue him, told him he was making a mistake, and made what the officer interpreted as sexual advances.
Mr. Cissne moved in limine to bar testimony about the HGN test results, his statements about suing the officer, and statements interpreted as sexual advances. He argued that the HGN test was not based on generally accepted scientific principles, was therefore inadmissible under
Frye v. United States,
Although the State failed to present any evidence regarding the reliability of HGN testing, the arresting officer was permitted to testify as tо Mr. Cissne's HGN test results and to give his opinion regarding them. 2 The arresting officer *680 and dispatch officer testified as to the objected-to statements made by Mr. Cissne after his arrest.
The jury found Mr. Cissne guilty of driving while intoxicated. His conviction was affirmed on appeal by the Superior Court. We accepted review.
Horizontal Gaze Nystagmus Testing
1. Contentions. Mr. Cissne contends HGN tеsting is not based on generally accepted scientific principles and therefore is inadmissible under
Frye.
He cites
People v. Loomis,
The State contends HGN testing does not involve scientific principles, is not a novel idea and the
Frye
standard is inapplicable when the test results are not offered to prove a specific blоod alcohol level. The State contends that even if
Frye
applies, HGN testing meets that standard. Even though no
Frye
foundation was made in this case, the State suggests we look to the decisions of other jurisdictions which have determined that HGN tests meet the
Frye
standard.
E.g., State v. Superior Court,
2. Nystagmus. Nystagmus is the "oscillation of the eyeballs, either pendular or jerky".
Stedman's Medical Dictionary
971 (5th ed. 1982). This involuntary movement results from the body's аttempt to maintain orientation and balance. HGN is the inability of the eyes to maintain visual fixation as they turn from side to side or move from center focus to the point of maximum deviation at the side.
State v. Superior Court, supra; State v. Garrett,
The frequency and amplitude of nystagmus is increased and it occurs at a smaller angle of deviation from the forward direction, after consumption of alcohol. The reason is that alcohol is both a depressant and an irritant to nerve endings, including those in the inner ear. Alcohol stimulates the nerves, but at the same time causes them to become more lax and lag behind. As blood alcohol levels increase, gaze nystagmus becomes more noticeable because the distance required to move the eyes to the side in order for the jerking motion to occur lessens. Tenney,
The Horizontal Gaze Nystagmus Test and the Admissibility of Scientific Evidence,
27 N.H.B.J. 179, 179-81 (1986); Carper & McCamey,
In addition to alcohol consumption, nystagmus can be produced by a variety of pathological, chemical and natural causes.
Buening,
3. Testing Procedures. According to one source, the HGN test was developed for use by law enforcement officers during the 1970's when the federal government began researching ways to assist officers in evaluating drivers suspected of driving while intoxicated (DWI). Carper & McCamey,
In administering the HGN test, the driver is instructed tо cover one eye and focus the other on an object such as a pen, pencil or finger which is held at the driver's eye level. As the object is gradually moved out of the driver's field of vision and toward his or her ear, the officer watches the eyeball to
*682
detect involuntary jerking and estimate the angle of gaze nystagmus. The procedure is repeated for the other eye. The nearer to the subject's nose that gaze nystagmus begins, the higher the blood alcohol content.
3
Tenney, 27 N.H.B.J. at 179-80; Carper & McCamey,
The National Highway Traffic Safety Administration claims the HGN test is an accurate and effective way to determine whether а driver's blood alcohol concentration exceeds .10. National Hwy. Traffic Safety Admin., DOT HS 806 512, Improved Sobriety Testing (Jan. 1984), reprinted in 2 D. Nichols ch. 26 app. A (1984).
4. Varying Judicial Interpretations. The admissibility of HGN evidence has been challenged in numerous jurisdictions. As summarized below, judicial responses have varied.
a.
Not a Scientific Test.
Some jurisdictions view the HGN test as no more scientific than other field sоbriety tests. For example,
State v. Nagel,
The gaze nystagmus test, as do the other commonly used field sobriety tests, requires only the personal observation of the officer administering it. It is objective in nature and does not require expert interpretation.
Nagel held an officer's testimony as to the results of HGN testing is admissible as lay oрinion evidence.
*683
State v. Bresson,
In
State v. Murphy,
Finley v. State,
In the above cited cases, HGN evidence was admitted as evidence of intoxication, but not as evidence of a specific degree of blood alcohol content.
b. A
Scientific Test.
Many jurisdictions, perhaps a majority, have concluded that HGN testing is based on scientific principles and the
Frye
standard
or
other standard for
*684
determining scientific reliability must be met if test results аre to be introduced as evidence of intoxication. For example,
State v. Superior Court,
The HGN test is a different type of test from balancing on one leg or walking a straight line because it rests almost entirely upon an assertion of scientific legitimacy rather than a basis of common knowledge.
A similar conclusion was reached in
State ex rel. Hamilton v. City Court,
Some jurisdictions requiring adherence to the Frye standard have found the HGN test meets that standard. Others have yet to make that determination. Compare State v. Superior Court, supra, Armstrong and Garrett with Witte, Buening, and Apollo. Witte, the most skeptical of the acceptance of HGN testing in the scientific community, refused to determine whether HGN evidence met the Frye standard because, as in this case, the trial court lacked an opportunity to examine, weigh and decide the disputed facts to determine whether the test was sufficiently reliable. 5 As Witte noted, ■research and articles critical of HGN testing appeared after some jurisdictions concluded that HGN testing satisfied the *685 Frye standard. Other jurisdictions have refused to apply the Frye standard to determinе the admissibility of HGN evidence, even though they have determined it is based on scientific principles. For example, Montana has concluded its liberal evidentiary rules have eroded the "general acceptance" standard of Frye.
Unless an exaggerated popular opinion of the aсcuracy of the particular technique makes its use prejudicial or likely to mislead the jury, the better approach is to admit all relevant scientific evidence in the same manner as other expert testimony and allow its weight to be attacked by cross examination or refutation.
Clark, at 227. The evidentiary rule relied on in Clark, Montanа Rule of Evidence 702, is identical to Fed. R. Evid. 702 and Washington's ER 702. All three state:
If 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.
A conclusion similar to
Clark
was reached in
State v. Gleason,
Although Washington recognizes that other jurisdictions have rejected
Frye
in favor of a more liberal test of admissibility based on the relevance standard of the Federal Rules of Evidence, it nevertheless has continued to employ
Frye
when determining the admissibility of evidence based on novel scientific procedures.
State v. Cauthron,
We hold the Frye standard applies to the admission of evidence based on HGN testing, unless, on remand, the State is able to prove that it rests on scientific principles and uses techniques which are not "novel" and are readily understandable by ordinary persons. 6 We decline the State's invitation to follow thosе few jurisdictions that have concluded that HGN testing meets the Frye standard. The trial court must evaluate, weigh and consider the conflicting evidence before determining whether the test is novel, and, if it is novel, whether it is reliable as an indicator of the probability of impairment or of a specific blood alcohol level. The parties have not brought any of this evidence to the attention of this court or the trial court.
Admission of Statements
Mr. Cissne contends the trial court also erred in admitting testimony regarding Mr. Cissne's statements about suing the officer and those interpreted by the officer to be sexual advances. He contends the statements were irrelevant because they had nothing to do with any elements of the crime *687 and, even if relevant, they were inadmissible because they were prejudicial. ER 403.
Evidence is relevant if it tends to make any fact of consequence more or less probable. ER 401. As stated in Nagel, at 80: "Objective manifestatiоns of insobriety, personally observed by the officer, are always relevant where . . . the defendant's physical condition is in issue."
Since the issue was Mr. Cissne's intoxication, the statements at issue were relevant. The trial court balanced their probative value with their prejudicial effect. We cannot say the court abused its discretion in admitting the statements.
Prejudicial Error
Mr. Cissne contends the improper admission of the HGN tests is sufficient to require a new trial.
Barker.
We agree. Although the trial court's error was not of constitutional magnitude, a new trial is required because it is impossible to determine whether the jury's verdict was affected by the еrror.
State v. Zwicker,
We reverse and remand for a new trial.
Munson and Sweeney, JJ., concur.
Review denied at
Notes
Nystagmus and nystagmus testing are described in detail herein.
The officer explained nystagmus and HGN testing as follows:
It is a scientific or medical teaching or fact that with the degree of intoxication the eyes are unable to [track] smoothly and/or not even [track] at all. Under extreme intoxication the eye will get to an angle and because of the intоxication the eye is unable to follow and the eye will actually, for lack of better term, go into a spaz effect and the pupil will actually just fluctuate back and forth rapidly from side to side while the eye is trying to focus on the *680 object and just simply watching the movement of the eyes from side to side and you do both their right and left eye.
When asked how persons would respond to an HGN test if they had not consumed alcohol, the officer answered: "They are able to accurately and clearly follow any object from one side to the other as the object is moved."
The officer concluded thаt, based on the HGN tests, Mr. Cissne "was obviously intoxicated or under the influence of intoxicants".
There are three possible signs of intoxication for each eye:
Angle of Onset — the more intoxicated a person becomes, the sooner the jerking will occur as the eyes move to the side.
Maximum Deviation — the greater the alcohol impairment the more distinct the nystagmus is when the eyes are as far to the side as possible.
Smooth Pursuit — an intoxicated person often cannot follow a slowly moving object smoothly with his eyes.
2 D. Nichols § 26:01, at 109 (Cum. Supp. 1993).
A score of six points is possible, three for each eye. According to the Nаtional Highway Traffic Safety Administration, if a driver scores four or more points, the driver's blood alcohol concentration is above .10. National Hwy. Traffic Safety Admin., DOT HS 806 512, Improved Sobriety Testing 4 (Jan. 1984), reprinted in 2 D. Nichols ch. 26 app. A (1984). According to one source, however, there is no agreement in the scientific community about the correlatiоn between the degree of onset of alcohol gaze nystagmus and blood alcohol concentration. 2 D. Nichols. § 26:01, at 3-4 (1993).
Murphy determined that because the Iowa Law Enforcement Academy and the United States Department of Transportation viewed the HGN test as a reliable indicator, it was reliable for purposes of rule 702.
The disputed facts in Witte were contained in books and journals, many of them critical of HGN testing. E.g., Rouleau, Unreliability of the Horizontal Gaze Nystagmus Test, 4 Am. Jur. Proof of Facts 3d 439 (1989); Pangman, Horizontal Gaze Nystagmus: Voodoo Science, 2 DWI Journal 1 (1987); 2 D. Nichols § 26:01 (Supps. 1991 & 1992).
An expert opinion based on practical experience and acquired knowledge and not involving a new method of proof or novel scientific principle does not have to meеt the
Frye
standard when such opinion is readily understandable by ordinary persons.
State v. Ortiz,
