Research on Non-verbal Signs of Lies and Deceit: A Blind Alley

T. Brennen & S. Magnussen

Front. Psychol., 14 December 2020

https://doi.org/10.3389/fpsyg.2020.613410

Introduction

Research on the detection of lies and deceit has a prominent place in the field of psychology and law with a substantial research literature published in this field of inquiry during the last five to six decades (Vrij, 2000, 2008; Vrij et al., 2019). There are good reasons for this interest in lie detection. We are all everyday liars, some of us more prolific than others, we lie in personal and professional relationships (Serota et al., 2010; Halevy et al., 2014; Serota and Levine, 2015; Verigin et al., 2019), and lying in public by politicians and other public figures has a long and continuing history (Peters, 2015). However, despite the personal problems that serious everyday lies may cause and the human tragedies political lies may cause, it is lying in court that appears to have been the principal initial motivation for the scientific interest in lie detection.

Lying in court is a threat to fair trials and the rule of law. Lying witnesses may lead to the exoneration of guilty persons or to the conviction of innocent ones. In the US it is well-documented that innocent people have been convicted because witnesses were lying in court (Garrett, 2010, 2011; www.innocenceproject.com). In evaluating the reliability and the truthfulness of a testimony, the court considers other evidence presented to the court, the known facts about the case and the testimonies by other witnesses. Inconsistency with the physical evidence or the testimonies of other witnesses might indicate that the witness is untruthful, or it may simply reflect the fact that the witness has observed, interpreted, and later remembered the critical events incorrectly—normal human errors all too well known in the eyewitness literature (Loftus, 2005; Wells and Loftus, 2013; Howe and Knott, 2015).

(as it ends)

Is the rational course simply to drop this line of research? We believe it is. The creative studies carried out during the last few decades have been important in showing that psychological folklore, the ideas we share about behavioral signals of lies and deceit are not correct. This debunking function of science is extremely important. But we have now sufficient evidence that there are no specific non-verbal behavioral signals that accompany lying or deceitful behavior. We can safely recommend that courts disregard such behavioral signals when appraising the credibility of victims, witnesses, and suspected offenders. For psychology and law researchers it may be time to move on.

Influencing choices with conversational primes: How a magic trick unconsciously influences card choices

Alice Pailhès and Gustav Kuhn
PNAS, Jul 2020, 202000682
DOI: 10.1073/pnas.2000682117

Abstract

Past research demonstrates that unconscious primes can affect people’s decisions. However, these free choice priming paradigms present participants with very few alternatives. Magicians’ forcing techniques provide a powerful tool to investigate how natural implicit primes can unconsciously influence decisions with multiple alternatives. We used video and live performances of the mental priming force. This technique uses subtle nonverbal and verbal conversational primes to influence spectators to choose the three of diamonds. Our results show that a large number of participants chose the target card while reporting feeling free and in control of their choice. Even when they were influenced by the primes, participants typically failed to give the reason for their choice. These results show that naturally embedding primes within a person’s speech and gestures effectively influenced people’s decision making. This raises the possibility that this form of mind control could be used to effectively manipulate other mental processes.

Significance

This paper shows that naturally embedding primes within a person’s speech and gestures effectively influences people’s decision making. Likewise, our results dovetail findings from choice blindness literature, illustrating that people often do not know the real reason for their choice. Magicians’ forcing techniques may provide a powerful and reliable way of studying these mental processes, and our paper illustrates how this can be done. Moreover, our results raise the possibility that this form of mind control could be used to effectively manipulate other mental processes.

A pdf of the research can be found here.

Editor's Note: This research has implications of how psychologists may consciously or unconsciously influence patient choices.

The Surprising Power of Questions

Alison Wood Brooks and Leslie K. John
Harvard Business Review
May-June 2018 Issue

Here are two excerpts:

Most people don’t grasp that asking a lot of questions unlocks learning and improves interpersonal bonding. In Alison’s studies, for example, though people could accurately recall how many questions had been asked in their conversations, they didn’t intuit the link between questions and liking. Across four studies, in which participants were engaged in conversations themselves or read transcripts of others’ conversations, people tended not to realize that question asking would influence—or had influenced—the level of amity between the conversationalists.

The New Socratic Method

The first step in becoming a better questioner is simply to ask more questions. Of course, the sheer number of questions is not the only factor that influences the quality of a conversation: The type, tone, sequence, and framing also matter.

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Not all questions are created equal. Alison’s research, using human coding and machine learning, revealed four types of questions: introductory questions (“How are you?”), mirror questions (“I’m fine. How are you?”), full-switch questions (ones that change the topic entirely), and follow-up questions (ones that solicit more information). Although each type is abundant in natural conversation, follow-up questions seem to have special power. They signal to your conversation partner that you are listening, care, and want to know more. People interacting with a partner who asks lots of follow-up questions tend to feel respected and heard.

An unexpected benefit of follow-up questions is that they don’t require much thought or preparation—indeed, they seem to come naturally to interlocutors. In Alison’s studies, the people who were told to ask more questions used more follow-up questions than any other type without being instructed to do so.

The article is here.

This article clearly relates to psychotherapy communication.

Honesty and Dishonesty Don’t Move Together: Trait Content Information Influences Behavioral Synchrony

Marco Brambilla, Simona Sacchi , Michela Menegatti, Silvia Moscatelli
Journal of Nonverbal Behavior, pp 1-16

Abstract

Emerging evidence revealed that honesty and trustworthiness are important drivers of the impression-formation process. Questions remain, however, regarding the role of these moral attributes in guiding real and concrete behaviors. Filling this gap, the present study investigated the influence of honesty on a nonverbal behavior that regulates social interactions: behavioral synchrony. Movements were recorded while participants interacted with a partner who was depicted as honest (versus dishonest) or as friendly (versus unfriendly). Results showed that synchrony was affected only by the honesty of the partner. Specifically, the more the interaction partner lacked honesty, the lower the perceived similarity between the self and the interaction partner, which in turn diminished the promptness to engage in behavioral synchrony. Our findings connected the literature on behavioral synchrony with that on the implication of morality for social perception, revealing the key role of the honesty facet of moral character in shaping nonverbal behaviors.

The article is here.

New emotion detector can see when we're lying

By Hamish Pritchard

Science Reporter, BBC News

A sophisticated new camera system can detect lies just by watching our faces as we talk, experts say.

The computerised system uses a simple video camera, a high-resolution thermal imaging sensor and a suite of algorithms.

Researchers say the system could be a powerful aid to security services.

It successfully discriminates between truth and lies in about two-thirds of cases, said lead researcher Professor Hassan Ugail from Bradford University.

The system, developed by a team from the universities of Bradford and Aberystwyth in conjunction with the UK Border Agency, was unveiled today at the British Science Festival in Bradford.

This new approach builds on years of research into how we all unconsciously, involuntarily reveal our emotions in subtle changes of expression and the flow of blood to our skin.

We give our emotions away in our eye movements, dilated pupils, biting or pressing together our lips, wrinkling our noses, breathing heavily, swallowing, blinking and facial asymmetry. And these are just the visible signs seen by the camera.

 

The entire story can be read here.