[00:00:00] Have you ever wished you had a built in lie detector for everyday conversations? Detectives and 911 operators wish they could detect lies. Forensic psychologists developed cops cops scale, abbreviated for considering offender probability statements to detect deception and catch false allegation callers in homicide cases. To validate the scale's accuracy, other forensic scientists examined the scale's ability to differentiate between case results from false allegation callers and the results of the investigations of true report callers. To check the COPS scale validity and its indicators, researchers analyzed 100911 homicide calls and compared them with outcomes of investigations.
[00:00:43] Comparing the COPS scale scores with case outcomes, researchers found the predictions were not accurate. False allegation callers did not score higher on the total COPS scale compared to true report callers. Thus, the COPS scale fails to accurately measure the caller's level of deception. However, recent researchers found that some questions can be considered up to 90% accurate while other items were invalid. Though the KOP scale must not be used, this demonstrates how psychology scientists review, test, and critique others research to ensure accurate self report measures. Step by step Test, reject, revise, try again. Using controlled research.
