14/05/2021.University of Portsmouth - B Roll - Day Two..All Rights Reserved - Helen Yates- T: +44 (0)7790805960.Local copyright law applies to all print & online usage. Fees charged will comply with standard space rates and usage for that country, region or state.

Investigating cues to credibility when individuals lie or tell the truth about a witnessed event- research study for staff and students

4 min read

Participants will report truthfully or falsely about a secret film clip they will watch.

What will participants be doing?

Participants will be asked to imagine that they are an undercover agent for the Government, and they will be assigned to either tell the truth or lie. They will first witness a secret film clip and will be asked to remember the details to pass on to an agent who is higher up in the chain.

After viewing the secret film clip, participants will fill out a pre-interview questionnaire and then will either tell the truth about what they witnessed in the clip or lie about some aspects in an interview.

After completion of the interview, participants will complete a post-interview questionnaire and then be debriefed about the study. Participants do not need to prepare anything in advance.


Approximately 40 minutes.


Those interested may contact the researcher Viktoria at (viktoria.filipova@myport.ac.uk).

If you have any questions, you should contact Viktoria Filipova viktoria.filipova@myport.ac.uk or Haneen Deeb (haneen.deeb@port.ac.uk).

Participant characteristics:

  • staff, students and the general public
  • any gender
  • aged 18+


Participants will be paid £15 for their time. Psychology students requiring participant pool credits instead of payment will receive 1 course credit.

Additionally, if participants are convincing during the interview, they will be entered into a draw to win one of three prizes up to £150. The first prize is £150, the second prize is £75 and the third prize is £50.


Department of Psychology, King Henry's Building, King Henry I Street, Portsmouth, PO1 2DY.

Closing date

23 June 2023.

Ethics code: SHFEC 2023-019