Hercule Poirot mystery offers insight into asking interview questions

I have something in common with one of the characters in The Fourth Man, a short story from The Witness for the Prosecution and Other Stories, by Agatha Christie.

“ ‘Very interesting,’ said Canon Parfitt. ‘Ah! Wonderful science—wonderful science.’

“And inwardly he thought to himself: ‘I can get a most interesting sermon out of that idea.’ ”

It’s been decades since I wrote a sermon and I don’t expect to deliver one any time soon, but often what I read or experience becomes the inspiration for a blog post, or even a book.

Frequently, this occurs when I read a mystery or watch a movie or TV show that portrays detectives as they solve crimes, usually beginning with the discovery of a body under suspicious circumstances. I see similarities between how fictional detectives solve murders and how managers and supervisors should conduct hiring interviews and reference checks.

You can identify the right people to hire the same way detectives decide which suspect to arrest.

Cat Among the Pigeons, the 32nd Hercule Poirot book by Agatha Christie, includes several passages that represent best practices, whether for hiring or solving a murder.

In this novel, the early investigation into the murder of a teacher at Meadowbank, a prestigious British girls boarding school, is conducted by police Inspector Kelsey, who later partners with Belgian sleuth Poirot to solve this and other murders. 

“Kelsey returned from the bypath he had been pursuing. ‘Now, Miss Johnson, let’s hear what happened.’”

This open-ended question allows the woman who discovered the body to tell the inspector what’s top of her mind before the inspector begins his usual investigative questions.

Like Miss Johnson, job candidates have thoughts they want to share right away. Opening interviews by asking the candidates to “take a couple of minutes to tell us what in your training and background has prepared you for this position,” provides an opportunity for them to deliver their essential message in response to the unasked question, “Why should we hire you?”

Both Inspector Kelsey’s and your question are short and don’t lead the witness or candidate in any direction. The responses to these questions may not produce a lot of useful information but they are a simple, stress-reducing way to get the witness or candidate talking.

Later, Agatha Christie describes a trait that makes the police officer an effective investigator.

“Inspector Kelsey was a perceptive man. He was always willing to deviate from the course of routine if a remark struck him as unusual or worth following up.”

It’s not unusual for a suspect, witness, candidate or reference to give incomplete answers. Detectives and interviewers should be prepared to probe to learn more.

When deciding what to ask candidates and references, interviewers should consider what they hope to learn about the candidate’s experience from each question. They should be prepared with followup questions if the initial responses from candidates or references is incomplete. Besides freeing interviewers from formulating followup questions on the spot, which can break your concentration on what is being said, having pre-scripted questions ensures fairness in the interview process. All candidates will be invited to describe their experiences in a similar fashion. 

It’s impossible to anticipate every circumstance that will occur during an interview and occasionally interviewers will find themselves without a prepared followup question. The interviewer may need to improvise, such as occurred when Hercule Poirot was questioning a potential witness.

“‘I see,” said Poirot. He went on, “Did you ever see at Meadowbank anyone that you’d seen out in Ramat?’

“‘In Ramat?’ Jennifer thought. ‘Oh no—at least—I don’t think so.’

“Poirot pounced on the slight expression of doubt. ‘But you are not sure, Mademoiselle Jennifer.”

Inspector Kelsey displays another technique that interviewers should add to their skill set.

“‘Anyway,’ said Kelsey, ‘you went to Miss Chadwick and woke her up. Is that right?’”

The standard advice is to avoid questions that can be answered with a single word like yes or no, because you will learn little from brief responses. But there are exceptions to this rule.

There may be points during an interview or investigation when it’s desirable to confirm your understanding of what was said. You want to be certain that your conclusions are based on the facts, just as the facts should lead to identifying the murderer. 

A variation of this technique can be used to rein in particularly verbose candidates. Interrupt a long-winded response to summarize what you hear and ask, “Is that right?” 

Then pray that the candidate’s answer is yes. 

In addition to confirming what you believe the candidate said, this is also a way to keep your interview on schedule.

The shared goal of interviewers and detectives is to get it right. The best tool you have at your disposal is the set of questions you ask. The better your interviewing skills, the better the quality of information that will be available to you when deciding the right person to hire (or arrest).

No detective wants an investigation to end with a courtroom acquittal. And you don’t want to fill a vacancy with the wrong person.

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Want to learn more about questions to ask during interviews? Schedule an Interview Right to Hire Right workshop for your leadership team. Contact Nelson (email nmscott@telus.net or text/phone 780-232-3828) to set a date for your workshop or to learn more.

Planning a conference or convention? Nelson’s How Would Sherlock Hire? program may be just the breakout session you are looking for.

Look to the past for evidence to guide hiring decisions

Those who wish to hire the right people to fill vacancies would do well to heed the advice of Hercule Poirot, who appears in more than 30 of Agatha Christie’s murder mysteries and in even more of her short stories.

In Cards on the Table, the Belgian detective is challenged to identify who is responsible for the death of the host of a dinner party. 

Which of the four suspects who were playing bridge in the room where the murder occurred had a motive to kill?

Poirot believes that the answer lies in the past, where the murder victim believed each card player was responsible for an undetected murder. Who felt the host needed to be silenced before he exposed them as guilty of a crime?

“There is only one way in this crime,” Poirot states. “We must go back into the past.”

There is where he expects to find a motive for murder.

The past is also where interviewers should seek evidence on which to base  decisions about who is the right person to hire.

Interview questions should focus on how candidates performed in previous jobs. What values motivated their actions? These are likely the same values that will guide their behaviour if hired for your workplace. Are the values that were the motive for what they did in previous positions aligned with the values of your workplace?

Once again, let’s quote Hercule Poirot, this time from Five Little Pigs: “That was my task—to put myself in reverse gear, as it were, and go back through the years and discover what really happened.”

What we learn by going back helps us predict how candidates will respond to situations that they may face if hired.

This reflects the underlying principle of behaviour description interviewing (BDI): “Past performance is the best predictor of future performance.”

Asking candidates what they would do in various scenarios presented by the interviewer does not uncover evidence of past on-the-job performance that can be so valuable when deciding who to hire.

Candidates may describe what they think they would do, what others told them they should do, or what they think you would want them to do. Not lies, exactly, but they provide no information about what they have actually done.

Interviewers are without evidence of past experience on which to base their prediction of the candidates’ future on-the-job success or their potential failure to meet expectations. All the interviewer has are the candidates’ predictions of what they would do, which is not a sound basis for good hiring decisions.

Relying on what candidates say they would do is as useless for selecting the right person to hire as Poirot expecting to identify the murderer by simply asking each of those at the bridge table which player they think did it.

Related Article: How interviewers are like literature’s famous detectives

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Participants in Interview Right to Hire Rightworkshops develop behaviour description interview (BDI) questions they can use the next time they interview. To schedule a workshop for your leadership team or to learn more, contact Nelson (nmscott@telus.net or 780-232-3828).