SciELO - Scientific Electronic Library Online

vol.31 issue1Is flourishing good for the heart?: relationships between positive psychology characteristics and cardiorespiratory healthConvergent validity of the measures of attention and impulsivity in the Trees: simple Visual Discrimination Test (DiViSA-UAM) author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links

  • On index processCited by Google
  • Have no similar articlesSimilars in SciELO
  • On index processSimilars in Google


Anales de Psicología

On-line version ISSN 1695-2294Print version ISSN 0212-9728


BADOS, Arturo  and  PERO, Maribel. Psychometric properties of the Modified Tonic Immobility Scale. Anal. Psicol. [online]. 2015, vol.31, n.1, pp.66-73. ISSN 1695-2294.

The Tonic Immobility Scale has been only studied in abuse and/or sexual assault survivors, but tonic immobility (TI) also occurs after other types of traumatic events. Consequently, we modified the scale for this purpose and studied its factor structure, internal consistency, and convergent, divergent and discriminant validity in 392 university students, most of whom had suffered one or more traumatic events of various kinds. The Fear subscale of the Modified Tonic Immobility Scale (MTIS) showed very low internal consistency, and must be eliminated or reformulated. Discrimination indices of items 5 and 8 were very low, and tríese items must be reformulated or removed. After removing the five previous items, the shortened version of the MTIS had a one-factor structure, although model fit was not completely satisfactory. This scale showed acceptable levels of reliability, convergent validity with post-traumatic symptomatology, divergent validity with measures of depression and anxiety, and discriminant validity differentiating between groups that had and had not experienced traumatic events. The psychometric properties of the shortened version of the MTIS should be studied further. It may also be advisable to add new items of TI in order to establish whether this is a construct with more than one dimension.

Keywords : Tonic immobility; trauma; tonic immobility scale; traumatic events questionnaire.

        · abstract in Spanish     · text in English     · English ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License