CALIFORNIA EVIDENCE: CIVIL AND CRIMINAL
...Opinion & Scientific Evidence
......Expert Testimony: In General
.........Things Expert May Not Rely On
............Opinions of Other Experts
5 Cards On This Topic:

Expert may rely upon opinions of other experts, but may not testify on direct exam as to content of those other opinions. Expert may be cross-examined on content.

Sustaining hearsay objection to defense psychologist's testimony as to what D told another psychologist, as well as not allowing E to answer hypo, was nonprejudicial error.

Expert may not base own opinion upon opinion of other expert, and may not relate hearsay opinion of other expert as independent proof of fact.

Expert may rely on hearsay to form own opinion but may not relate opinions of others as independent proof of fact.

When experts may rely upon opinions of others in forming opinion.