A few years ago Robert noticed a few gray hairs. A little frustrated, he was able to isolate and pluck them out one by one; however, recently his gray hairs have become overwhelming in number and he has more gray hairs than brunette

Which of the following is true regarding lie detectors?

A) Lie detectors are accepted as valid evidence in most U.S. courts, but not in other countries. B) Research suggests that traditional polygraphs are about 78% accurate as lie detectors. C) Polygraphs are able to detect arousal, but are not valid indicators of lying. D) Researchers have been unable to identify any potential lie detector replacements for the polygraph.

A two-factor experimental design evaluates two main effects and one interaction

a. True b. False Indicate whether the statement is true or false