Clarifying Life and Death Matters: An Analysis of Instructional Comprehension and Penalty Phase Closing Arguments

We report the results of two studies designed as follow-ups to our earlier research on the comprehension of capital penalty instructions. In the first study we examine whether a California penalty instruction that was revised by the courts to improve its comprehension by jurors accomplishes this goal. In the second study we content-analyze a sample of attorney closing arguments that were given at the conclusion of actual capital penalty phases to explore whether they are likely to clarify those concepts and procedures that are so poorly comprehended in the judge's instructions. Results indicate that the revised instruction suffers from the same comprehension problems that plagued its predecessor and that attorney arguments appear unlikely to significantly reduce confusion among capital jurors.