Have you ever lied in a job interview? Do you think it's okay to lie in a job interview? Turns out it's a lot more common than you'd think, or at least than you'd want if you're a hiring manager, with 41 per cent of Aussies saying it's cool to lie in an interview.

You've likely heard that body language accounts for up to 55 per cent of how we communicate, but reading non-verbal cues isn't just about broad strokes. The same gesture can indicate a number of different things depending on context.

In this guide, we're going to take a look at three common situations in which non-verbal cues are especially important - detecting lies, going on a date and interviewing for a job - then explain how to interpret body language more accurately so that you can read between the lines when a person's words aren't necessarily conveying the way that they honestly feel.

How do you deal with a psychopath? What if you realise you married one? This week on The Upgrade we’re joined by Jen Waite, author of A Beautiful, Terrible Thing: A Memoir of Marriage and Betrayal, and Dr Michael Stone, professor of psychiatry at Columbia University and author of The Anatomy of Evil, to talk about psychopaths, sociopaths and narcissists: How to recognise them, how to avoid them, and how to disentangle yourself from them.

Dear Lifehacker, I've recently relocated to London for a year or two and am looking to start work. Most of my applications have been via recruiters who have responded with a range of roles. I'm interviewing for a couple of jobs this week but one is about 90 minutes away in another city and the other sounds like good work but the organisation might not be the right cultural fit for me.

Just as companies have to weed out the good candidates from the bad, you need to be able to tell the good companies and positions from the ones that will just waste your time. Here are some red flags in job descriptions and interviews that can warn you about a potentially terrible job.

Dear Lifehacker, I'm thinking of moving on from my current job, but there's a problem. I have some health issues that require a weekly appointment and I currently have my appointment on a Friday afternoon. My current manager has rearranged my work hours slightly so that I can attend this appointment. My question is: if I get an interview for a new job, should I tell them about this at the interview? If so, how do I go about it?

If you've ever hired anyone for a job, you understand a whole new perspective on what makes an applicant stand out - and what makes you toss an application to the bin. Fair or not, blogger, consultant and hirer Charlie Balmer discusses honestly the mistakes that can ruin your chances with a potential employer.

Tim Ferriss is an American entrepreneur, self-help guru and author best known for The 4-Hour Workweek. His hugely popular podcast series has seen some of world's most famous people reveal the tools, tactics, and tricks that led to their success. Here are 15 of the best; from Arnold Schwarzenegger's meditation tips to the creator of WordPress' favourite productivity tools.

You got the job! Oh, but you don't want or need it any more. What do you do? What should you say?

So you didn't get the job -- bummer. It stings but the process isn't over yet. Before you move on to the next potential gig, do these three things.

A one-on-one job interview is stressful enough. Add three to five other people all sitting across from you and firing questions your way and you have some people's worst nightmare. It's no one's idea of a good time, but with a little preparation and practice, you come across as a confident, excellent candidate despite the intimidating format.

It's pretty common for interviewers to ask you to share about specific experiences or skills related to the job you're interviewing for, but if you haven't been in the exact situation or used the tool they mention, you can get tripped up. Here's what to say so that you can come across as a good candidate even if you don't have an answer that matches their specific question.

Sure, your LinkedIn profile probably has your bright and cheery face front and centre, inviting people to explore your professional experience, but don't think using the same tactic on your resume will land you a gig in the real world. In fact, some hiring managers would rather you not use any images.

Job interviews can be challenging to navigate even without the added stress of trying to diplomatically field inappropriate, invasive, or downright illegal lines of questioning. In the interest of helping future job-hunters navigate these choppy waters, we looked at some of the weirdest interview experiences and sought out expert advice on how to handle them.

Elevator Pitch is a regular feature on Lifehacker where we profile startups and new companies and pick their brains for entrepreneurial advice. This week, we're talking with Jack Zhang, co-founder and CEO of cross-border payment platform Airwallex.

Whether you've been interviewed over one million times or can count on one hand how many times you've been face-to-face with a hiring manager, the process is always stressful. Not only are you trying your hardest to present the very best version of yourself, you're also attempting to read your audience and gather as much information as you can about the role, the company culture and the organisation itself. No pressure.

Elevator pitches are a great way to condense a complex idea into a small amount of time so you can get your startup project in front of someone who matters. Author Seth Godin recommends you pitch for a meeting, not the idea itself.

If you've created a great app, built some nifty hardware or been involved in a great project, it's possible the media will find out and come knocking on your door looking for an interview. I conduct dozens of interviews each year and have spoken with some really interesting people and others who had a great product but couldn't convey their story. Looking back, there are some easy things you can do to be ready for your moment in the spotlight.

Job interviews are nerve-wracking enough -- and then you get hit with an odd question like, "If you were a tree, what kind of tree would you be?"