Social Engineering Blogs

An Aggregator for Blogs About Social Engineering and Related Fields

Social Influence in Investigative Interviews

We talk a lot about how to understand people’s emotions and how to read what they say accurately, but what about learning how we can change our behavior so that they are more forthcoming?

This is the subject of a recent paper by Humintell’s Dr. David Matsumoto and Hyisung Hwang. In this study, they sought to examine the impact that different cues of authority had on information interviews. This was an attempt to determine whether the truth-tellers or the liars in a mock interview context were more likely to convey information, depending on the influence of the interviewer.

After recruiting participants, they were divided into a treatment and control group. The treatment group was encouraged to commit a mock crime but told not to disclose that they had done so, while the control group simply proceeded directly to the informational interview.

This design split the participants into those who had to lie and those who had to tell the truth during the interview, with each being encouraged by a small monetary payout to convince the interviewer that they were telling the truth and had not committed the crime.

However, there were other experimental conditions at play, namely the environmental context and appearance of the interviewer. In order to prime a sense of interviewer authority, for instance, some of the interviewer wore intimidating suits or had impressive degrees and law enforcement posters on the wall.

Nothing beyond those environmental factors was different. All of the interviewers followed the same script and spoke in comparable fashions, but previous research has seen profound differences in perceptions of authority based on these apparently simple differences.

Overall, they found that the authority conditions got truth-telling participants to freely volunteer more information than their counterparts in low-authority conditions. However, there was no effect for the liars.

Interestingly, the effect of the authority condition seemed to hold even for the truth-tellers written statements, even though these were completed after the interview. This suggests that there is some lasting impact from an impression of interviewer authority.

This helps expand on previous work that looked at how to evaluate interviewees’ truthfulness and emotions by looking instead at what can promote efficacy by the interviewer. It appears that these signs of authority, even if limited to clothing, can result in more forthcoming interviews.

While this appeared to only work on people who were already telling the truth, that does not take away from the usefulness of this information. Many interviews are conducted on truthtellers, with the struggle sometimes involving getting tight-lipped people to speak more freely. Wearing a suit or even putting your diploma on the wall might help here!

In the meantime, there is always more that needs to be learned about how to tell if your interlocuter is lying, so check out Humintell’s exciting training procedure!

Dr. Matsumoto Podcast Interview Part 2

Last week, we began discussing Dr. David Matsumoto’s podcast interview, but we weren’t able to get to all of it. So, now time to discuss the second half!

This time around, Dr. Matsumoto expounded on topics including the connection between deception and microexpressions, the role of gestures in communication, education, and artificial intelligence.

One of the important uses of microexpressions is their role in deception detection and lying. Even when somebody is trying to mask their true emotion, signs of it will “leak out” before they are able to sport the smile or passive expression that would hide their feelings. This is even more likely when that underlying emotion is particularly intense.

These “leaks” don’t necessarily prove truth or deception, but they may show that the emotion being expressed is not the expression being experienced. This can be the case for their gestures, body language, or facial expression.

Dr. Matsumoto connects this idea to the use of microexpressions. It is these ultra-quick expressions that get produced, but they are very hard to notice. Even people who notice a strange expression struggle at interpreting it. That is why most of the research involves video taping people and looking at the tapes frame by frame.

After this discussion, the interviewer sought to understand how different behaviors translate to their underling emotion.

While this is a big question, Dr. Matsumoto started by discussing different kinds of gestures. For example, certain types of hand waving exist to “animate speech.” These do not have inherent meaning, but this is still important in conveying excitement or word emphasis. Other gestures, called “emblems” can have specific verbal messages and include the “thumbs up,” among many others.

Gestures help with communication, but they also strengthen our own cognition. In experimental settings where hand gestures are constrained, people are shown to struggle at performing certain tasks, such as memory tests or mathematical problems.

Both Dr. Matsumoto and the interviewer emphasized the role of nonverbal communication in education. Clearly, an educational context is shaped by environmental factors, the behavior of the professor, and the way that professor conveys information.

Because these environmental factors determine a lot about a communicative context, as we discussed last week, Dr. Matsumoto emphasized the need for teachers to arrange classrooms as they saw necessary to determine certain sorts of educational engagement.

Similarly, while society emphasizes “what to say,” it often does not focus on how teachers should say things. Even if we praise (or chastise) a student, it is very important how this is done, in terms of the gestures and nonverbal behaviors conveyed by the teacher.

Finally, the interview ended with a discussion of artificial intelligence and how machines can be made to communicate effectively. Dr. Matsumoto stressed the need for machines to resemble humans but suggested that there was still uncertainty over exactly how human the robot looked.

Better Reading Body Language

While we have been focusing on microexpressions, reading people often depends on identifying their body language as well.

Humintell’s Dr. David Matsumoto has done exciting work on the role of body language in human communication and the extent to which similar patterns span cultures. As we’ve noted, it is necessary to disentangle what expressions are universal from those that differ based on culture, and in this respect body language is no different.

A recent article in Discover Magazine dug well into some of Dr. Matsumoto’s past work on body language and posture. Specifically, author Teal Burrell discussed Dr. Matsumoto’s work on the postures of Olympic and blind Paralympic athletes from around the world. This research found that, regardless of sight, victorious athletes consistently made the same posture of triumph.

While powerfully demonstrating universals across cultures, this same research also pointed to the role of culture. For example, defeated athletes often slump their shoulders in shame, but this is less common for those from cultures which discourage outward displays of shame. However, blind athletes from those same countries slumped their shoulders regardless of culture.

This helps show both a tendency to slump shoulders in shame but also the ability of culture to teach people to avoid that form of expression.

Dr. Matsumoto’s research underscores the importance of body language in understanding people and the culture that influences them. As the magazine piece continues, we can leverage our body language to make positive impacts on our own mood.

For instance, smiling may help reduce our stress levels, while so-called “power postures” can improve our confidence. A power posture, as we have blogged on before, is when the chest is thrust out with arms crossed, in a way that Burrell aptly describes as a “Wonder Woman” pose. Research into power postures does find that they lead to a great sense of power, but still such correlations can be taken with a grain of salt.

Body language isn’t just about changing how we feel but can also shape people’s perceptions of us. Eye contact, though not really an indicator of deception, helps promote a perception of trust. Similarly, mirroring posture and facial expressions helps show that we are listening and feeling empathetic.

This helps show how important body language is for us, but like many universal expressions, humans are not alone in our use of such communicative tools. In fact, Burrell points out how critical body language is for bees to communicate, and similar sorts of communicative dances are present among fish. Similarly, the highly intelligent ravens use their beaks to point and gesture, helping to form interpersonal bonds.

Coming to grips with how universal and powerful body language is is as important as understanding how culture mediates it. By better understanding both determinants of behavior, we can learn how to read people better and communicate effectively.