Christoforos Thomadakis


  • Phd candidate in Psychometrics. Department of Psychology. University of Crete (2012-present)
  • Master of Science (MSc) Industrial Relations and Personnel Management. London School of Economics. LSE, London (2001-2002)
  • Degree in Psychology. Department of Psychology. National Kapodistrian University of Athens (1994-1999)

Doctoral Thesis Title

Development and psychometric properties of the Greek Diagnostic Personality Inventory (GDPI-5) following the DSM-5 model in a Greek population.

Brief Description

The current thesis is working towards developing a new psychometric tool to evaluate personality disorders, following the new dimensional approach of PD as this is illustrated in the new DSM-5. A second goal is to test and evaluate the theoretical model supporting the new tool, following the recommendations of the DSM-5 experts. More specifically, with the use of modern psychometric techniques, a series of cross cultural adaptations of the new model will be performed. Finally and most important goal will be to develop a new psychometric tool following update scientific discussions and literature suggestions upon the complicated psychopathology construct and advanced psychometric techniques for the validity and reliability of such instruments.

Research Funding

Personal funding


  • Ioannis Tsaousis (supervisor)
  • Arianna Stogiannidou (co-supervisor)
  • Athanasios Douzenis (co-supervisor)

Scientific Journals

  • Karademas EC, Dimitraki G, Thomadakis C, Giannousi Z. (2018): The relation of spouse illness representations to patient representations and coping behavior: A study in couples dealing with a newly diagnosed cancer. Journal of Psychosocial Oncology. 2018 Oct 29:1-15.

Book Chapters

  • Θωμαδάκης Χρ. (2017). Ψυχολογικές προσεγγίσεις της Ηγεσίας: Από το προσωπικό κίνητρο στη διαχείριση της εξουσίας. Στο Στ. Γιαλαμάς, Χρ. Διαμαντόπουλος, Χρ. Θωμαδάκης, Α. Ν. Παπαστάμου, Δ. Ρούκας, Προτάσεις ηγεσίας για την έξοδο από την κρίση Αθήνα, (σελ. 138-162). Αθήνα: Εκδόσεις Παπαζήση

Conference Presentations

  • Thomadakis C. & Tsaousis I., (2017): Item Development and Factor Structure of the Greek Personality Diagnostic Questionnaire (GPDQ) according to DSM-5, 14th European Conference on Psychological Assessment (ECP14), Lisbon 2017.
  • Thomadakis C. & Tsaousis I., (2017): Military Psychology symposium: The development of a scientific recruitment system: the case of five psychometric tests for assessment, 16th Greek Conference on Psychology (ELPSE 2017), Thessaloniki 2017.
  • Thomadakis C. & Tsaousis I., (2016): The development of a Greek instrument in exploring personality psychopathology DSM-5, 6th Greek Conference on Counselling Psychology, Athens 2016.
  • Thomadakis C. & Tsaousis I., (2016): Examining the validity of the Greek HEXACO model (PROTEAS) in a Greek adult sample, 18th European Conference on Personality (ECP18), Timisoara 2016.
  • Thomadakis C. & Tsaousis I., (2015): Exploring the relationship between Exploring the relationship between the Greek taxonomic study and the HEXACO personality structure in a Greek population sample, 13th European Conference on Psychological Assessment (ECPA13), Zurich 2015.