This study assessed the impact of some complex question forms frequent
ly used by attorneys who examine and cross-examine witnesses in the co
urtroom. Fifteen males and 15 females from each of four student popula
tions (kindergarten, fourth grade, ninth grade, and college) viewed a
videotaped incident and then responded to questions about the incident
. Half the questions were asked in ''lawyerese'' (i.e., using complex
question forms); the remaining half asked for the same information usi
ng simply phrased question forms of the same length. Lawyerese confuse
d children, adolescents, and young adults alike. Questions that includ
ed multiple parts with mutually exclusive responses were the most diff
icult to answer; those that included negatives, double negatives, or d
ifficult vocabulary also posed significant problems. Results suggest t
hat complex question forms impede truth-seeking and should be prohibit
ed in court.