Method for providing indicators of congruence or incongruence between the body language and the Speech of a person, performed by a data processing system for determining congruence or incongruence between the body language and the Speech of the person, the method comprising the following steps: a/ providing a video recording device adapted to record images of a subject including face and at least some parts of the body, b/ recording a video of a Speech of that person with said video recording device, said video being divided into n video sequences comprising n sequences of images (or n visual sequences) and n corresponding audio sequences, c/ for each sequence of images, detecting at least one Visual cue Vc and attributing at least one rating among positive Vc+, neutral Vc0 and negative Vc- for each visual cue Vc, d/ for each audio sequence, detecting at least one Audio cue Ac and attributing at least one rating among positive Ac+, neutral Ac0 and negative Ac- for each Audio cue Ac, e/ for each video sequence, comparing the rating of said Audio cue Ac with the rating of said Visual cue Vc, and giving a congruence indicator which is a positive congruence indicator if both ratings are either positive (Vc+ and Ac+) or negative (Vc- and Ac-), a negative congruence indicator if one of the ratings is positive and the other one is negative (Vc+ and Ac-, or Vc- and Ac+), and a neutral congruence indicator if one of the ratings is neutral (Vc0 or Ac0), wherein the method is characterised in that it further comprises before step b), a preliminary step b0) for baseline establishment during which the following sub-steps are implemented: i) a reference film is shown to said person, said reference film comprising m reference film sequences, at least some of the reference film sequences being emotionally charged; ii) during the showing of the film, a recording of a reference video of the person is done; iii) dividing the reference video into m reference video sequences, each reference video sequence corresponding to a reference film sequence of said film; iv) for each reference video sequence, detecting at least one Visual cue Vc of a micro expression that is memorised in a baseline table of said person. a/ providing a video recording device adapted to record images of a subject including face and at least some parts of the body, b/ recording a video of a Speech of that person with said video recording device, said video being divided into n video sequences comprising n sequences of images (or n visual sequences) and n corresponding audio sequences, c/ for each sequence of images, detecting at least one Visual cue Vc and attributing at least one rating among positive Vc+, neutral Vc0 and negative Vc- for each visual cue Vc, d/ for each audio sequence, detecting at least one Audio cue Ac and attributing at least one rating among positive Ac+, neutral Ac0 and negative Ac- for each Audio cue Ac, e/ for each video sequence, comparing the rating of said Audio cue Ac with the rating of said Visual cue Vc, and giving a congruence indicator which is a positive congruence indicator if both ratings are either positive (Vc+ and Ac+) or negative (Vc- and Ac-), a negative congruence indicator if one of the ratings is positive and the other one is negative (Vc+ and Ac-, or Vc- and Ac+), and a neutral congruence indicator if one of the ratings is neutral (Vc0 or Ac0), i) a reference film is shown to said person, said reference film comprising m reference film sequences, at least some of the reference film sequences being emotionally charged; ii) during the showing of the film, a recording of a reference video of the person is done; iii) dividing the reference video into m reference video sequences, each reference video sequence corresponding to a reference film sequence of said film; iv) for each reference video sequence, detecting at least one Visual cue Vc of a micro expression that is memorised in a baseline table of said person.