Court of Appeals of Washington September 16, 2002, No. 47118-0-I (State v. Willis)

Ellington, J.

— Expert testimony is admissible so long as the witness has proper qualifications, relies on generally accepted theories, and the proffered testimony is helpful to the trier of fact. Alvin Willis sought to present testimony regarding the propriety and effect of specific interviewing techniques on children in sex abuse cases.