Within policing there is widespread promotion and use of questionable psychologically rooted practices as well as the acceptance of erroneous beliefs about police work. For instance, the articles composing this special issue show that dubious practices—hypnotic interviewing, polygraph examination, criminal profiling, critical incident stress debriefing, and detecting of deception solely on the basis of nonverbal cues—are routinely used by police agencies. Similarly, policing is pervaded by erroneous beliefs about confession evidence, eyewitness memory, lineup identification procedures, police behavior, and criminal behavior. The tie that binds these practices and beliefs is their lack of strong scientific support. In fact, these aspects of policing, and numerous others that are not covered in this special issue (e.g., psychic detection, authorship analysis, psychological autopsies), contain many characteristics that are indicative of pseudoscience (Lilienfeld, Lynn, & Lohr, 2003; Shermer, 2002; Stanovich, 2004). This is highly disconcerting because of the potential for severe consequences (e.g., miscarriages of justices) when pseudoscientific practices are employed by the police or when erroneous beliefs guide the consequential decision making that is inherent in police work. Tavris (2003) noted that there is a growing gap between the reliance on various practices in applied domains (e.g., clinical psychology, medicine, and engineering) and the amount of empirical evidence supporting those practices. Law enforcement does not appear to be immune to this widening scientist–practitioner gap. Concerns about the divide between psychological science and police work ultimately lead to questions about how police agencies, and other institutions within the criminal justice system, fall prey to such spurious practices and what can be done to help reduce their reliance on them. Concern about this schism, and the need to address these fundamental questions, stimulated this special issue. The specific goals of this special issue are to (a) identify a range of questionable practices and erroneous beliefs within law enforcement, (b) subject those practices and beliefs to incisive scientific scrutiny, (c) explain why law enforcement personnel use those unsubstantiated practices and form erroneous beliefs, (d) enhance the scientific foundation of the police profession, and (e) reduce the scientist–practitioner gap by arming law enforcement officers, police agencies, and other legal professionals with the knowledge required to identify pseudoscientific practices. Accordingly, each of the invited articles in this special issue contributes to the accomplishment of one or more of these goals.
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