Lay Opinion
A lay witness is simply any witness who has not been qualified as an expert, and that witness can always testify to facts within personal knowledge without restriction.
6. Lay Opinion
The Federal Rules of Evidence limit the scope of opinions offered by a lay witness.
- A lay witness is any witness who has not been qualified as an expert.
- Lay witnesses may testify about any facts within their personal knowledge. Opinions from lay witnesses, however, are limited to those that are:
- Rationally based on the witness’s perception;
- Helpful to clearly understanding the witness’s testimony or to determining a fact in issue; and
- Not based on scientific, technical, or other specialized knowledge within the scope of [the rule governing expert testimony].” Fed. R. Evid. 701.
- Examples of opinions that judges allow lay witnesses to offer are that an individual was happy, sad, frightened, or drunk.
- If an opinion requires specialized knowledge, then it may only be offered by a qualified expert witness following the rules that govern admission of expert testimony.
A lay witness may always testify to facts within personal knowledge, but a lay opinion comes in only if it clears a three-part conjunctive test. Failing any one part keeps the opinion out.
A lay witness is simply any witness who has not been qualified as an expert, and that witness can always testify to facts within personal knowledge without restriction. The catch is opinions.
- 1It must be rationally based on the witness's own firsthand perception.
- 2It must be helpful to clearly understanding the testimony or to deciding a fact in issue.
- 3It must not rest on scientific, technical, or other specialized knowledge.
All three are required, so failing any one keeps the opinion out. The everyday inferences ordinary people draw from what they observe are fine, such as that someone seemed happy, sad, frightened, or drunk, or rough estimates of speed or age. But once an opinion depends on specialized training or expertise, the perception of the witness no longer saves it, and only a qualified expert may offer it under the rules that govern expert testimony.
phs: Perception, Helpful, not Specialized.
All three or it is not lay opinion.
A neighbor watched a driver stumble out of a parked car, slur his words, and reek of alcohol, and the neighbor wants to testify the driver was drunk. A separate bystander, who has no medical training, watched the same driver and wants to testify the driver had a blood-alcohol concentration of point one two and was suffering an acute neurological episode.
An answer admits an opinion just because the witness personally saw the event, without checking whether the opinion needs specialized knowledge.
Perception is only one of three required prongs; a specialized opinion fails the 'not specialized' requirement no matter how directly the witness observed the facts.An answer bars a classic everyday lay opinion (drunk, frightened, speed, familiar handwriting) by calling it specialized, or demands an expert for an ordinary inference.
Everyday inferences from ordinary observation are permissible lay opinions and need no expert.An answer uses an absolute like 'always,' 'never,' 'any,' or 'automatically' about lay opinions.
The rule is a calibrated three-part test, not an absolute; both a flat ban on opinions and an automatic admission are wrong.An answer raises a true but off-point fact, such as lack of certainty or lack of an instrument, to exclude a proper lay opinion.
Those concerns go to weight, not admissibility; the opinion still comes in if it meets the three-part test.a non-expert witness offers an opinion or conclusion rather than a bare fact.
did the witness perceive the underlying facts firsthand, so the opinion is rationally based on personal perception?
does the opinion help the factfinder understand the testimony or resolve a fact in issue?
and most often dispositive, does the opinion depend on scientific, technical, or other specialized knowledge?
If it does, no amount of firsthand observation makes it proper lay opinion, and it must come from a qualified expert.
Only an opinion that clears all three prongs comes in as lay opinion.
A neighbor was standing on her porch when she watched a driver get out of his car, stagger, slur his speech, and smell strongly of alcohol. The neighbor has no medical or scientific training. At trial, she is asked her impression of the driver's condition and wants to testify that the driver appeared to be drunk. The opposing party objects that this is an improper opinion from a witness who has not been qualified as an expert.
Should the court allow the neighbor to give this opinion?
A bystander with no medical training saw a pedestrian collapse at an intersection. The bystander did not check the pedestrian's pulse or perform any examination. At trial, the bystander wants to testify that, in his opinion, the pedestrian had suffered a stroke caused by a blood clot in a specific cerebral artery. The party offering the testimony argues that because the bystander personally watched the collapse, the opinion is proper.
Is the bystander's opinion admissible as lay opinion?
A coworker has known an employee for several years and has spoken with him almost daily. On the morning of an incident, the coworker spent twenty minutes with the employee and observed his tone, expression, and behavior. The coworker has no training in psychology. At trial, the coworker is asked about the employee's state and wants to testify that the employee seemed frightened that morning. The opposing party objects that the coworker is not an expert.
May the coworker testify to this opinion?
A witness saw two cars approach an intersection and watched one car pass a fixed landmark just before the crash. The witness regularly drives and is generally familiar with how fast vehicles travel. He did not use any instrument and has no accident-reconstruction training. At trial, he wants to give his estimate that the car was traveling at roughly sixty miles per hour based on what he saw. The opposing party objects that estimating speed requires expertise.
Should the court permit the witness to give his speed estimate?
A bystander with no training in document examination watched a person sign a contract and is familiar with that person's ordinary handwriting from years of seeing it. A second witness, who also has no document-examination training, never saw the signing and wants to opine that a disputed signature is a forgery based on a side-by-side comparison of slant, pressure, and pen lifts of the kind a document examiner performs. Both opinions are offered without anyone being qualified as an expert.
Which witness, if either, may give the offered opinion as lay opinion?