Lay & Expert Opinions

Question 1

701: Opinion testimony by lay witnesses

Answer 1

elements
1) rationally based on witness’s perception
2) helpful to clearly understanding the witness’s testimony or determining a fact in issue
3) not based on scientific, technical, or other specialized knowledge

Question 2

definition of “helpful to the jury”

Answer 2

jury is unable to know
helps determine an issue in the case

Question 3

702: Testimony by Expert Witnesses (4)

Answer 3

elements
1) expert’s knowledge will help the trier of fact to understand the evidence or to determine a fact in issue
2) testimony is based on sufficient facts or data
3) testimony is a product of reliable principles and methods
4) expert has the reliably applied the principles and methods to the facts of the case