Research papers post traumatic stress disorder

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Maltz Prize for Schizophrenia Research. Colvin Prize for Mood Disorders Research. The Pardes Humanitarian Prize. Productive Lives Awards. About Us. Who We Are. Media Center. Multimedia Library. With the approval from the principal investigator for the general polycentric study 27 the basic set of instruments was further extended by adding the questionnaires for subjective time experience assessment. All instruments were translated from English into Serbian following comprehensive discussion with other investigators. The interviews were usually completed in one or two sessions.

Written informed consent was obtained for all study procedures. Strict confidentiality was emphasized.


Psychiatric treatment was offered to every examinee with a clinical level of psychopathology established. The examinees had possibility to give initials or to remain anonymous.. Modified Mississippi Scale for Combat-Related PTSD 27,31 ; this item scale is one of the most widely used measures of PTSD, proved to be one of the best self-rating instruments assessing this disorder both as a dichotomous and dimensional measure..

Subjective time experience was assessed using the following instruments:. The remaining two items served for revealing the negligence in answering.

The items in TIQ reflect the examinee's attitude towards numerous terms with temporal denotations incorporated in statements. The basic structure of temporal organization implied by the questionnaire is 1 succession, coherent spontaneity of inner flow Succession scale and 2 integration, activity, conduct of psychic contents Integration scale. Higher values of the succession items indicate a clearer distinction between the dimensions of the past, the present and the future, as well as a stronger experience of the continuous internal flow of time moments from past to future.

Higher scores on the integration items point to a stronger experience of the unity of the three basic time categories at the present moment of awareness, without mixing them.

Reliability of the scores on both scales in our sample was good Cronbach's alpha for Succession was 0. Temporal Integration Inventory — TII 33 ; a self-reporting instrument comprising 14 statements for assessing Temporal Distinction and Goal Directedness facets of temporal integration. Higher scores indicate clearer distinction between three basic temporal dimensions. Higher scores on Goal Directedness mean greater ability to link past and present thoughts and actions with the achievement of future goals.

Reliability of the scores on both subscales in our sample was modest Cronbach's alpha for the Temporal Distinction subscale was 0. Present Concentration Inventory — PCI 34 ; a self-report instrument that measures the degree of the ones focusing on the present with the relative exclusion of past and future. The examinee responds to them in the same way as to TII. The more attention is focused on the present and denied to the past and future, the higher the score on present concentration. The subject is asked to choose one of these categories and indicate the number of units within the category most precisely determining the focus of his temporal perspective in past TEIP and future TEIF , by asking him how far back or ahead he is thinking at the time of testing.

Given the methodological controversies associated with the use of such instruments i. Differences between groups PTSD, other psychiatric disorders and healthy with respect to socio-demographic characteristics were examined by Pearson chi-square test. Due to statistically significant and noticeable differences between groups with respect to certain socio-demographic characteristics see Table 1 an analysis of intergroup differences in mean scores on subjective time experience scales Primary goal was performed using One-factor MANCOVA, followed by Univariate ANCOVA's for each scale.

To maintain overall Type I error probability at 0. For these comparisons significance level was set at 0. In order to verify conditions for the use of MANCOVA, homogeneity of covariance matrices across the groups in regard to subjective time experience variables was examined using Box's test.. Total PTSD symptom severity: a sum of scores on item 20 subjective disturbances , 21 impaired social functioning and 22 impaired professional functioning ;. Arithmetic means adjusted for differences on covariates and standard errors in groups of participants with PTSD, those with other psychiatric disorders, and healthy persons on subjective time experience scales and results of one-factorial univariate analyses of covariance F -ratios and p values are shown in Table Means adjusted for covariates and standard errors of individual groups of participants on the scales of subjective time experience and the results of statistical analysis F and p of differences between groups..

Note : Means within the same row that are marked with the same superscript letter are not significantly different. For example: within the first row each mean has different letter a, b or c as superscripts: each mean is significantly different from each other. Within the second raw means are marked with a, a,b , and b, respectively: therefore, the first and the third means are significantly different, but the second one was not significantly different both from the first and the third one..


Results of post hoc multiple comparisons indicate that each group statistically significantly differs from each other on the Succession scale. There is a statistically significant difference between the healthy group and PTSD group on the Integration and Present Concentration scales. Altogether Table 2 the direction of differences as well as the adjusted arithmetic mean values in the groups on the Succession, Integration, Temporal Distinction and Goal Directedness scales are in line with expectations, i. In addition, the Succession scale is the most discriminative because it shows statistically significant differences between all the three groups.

The linear correlation coefficients between the scores on the subjective time experience scales and frequency of different PTSD symptoms clusters in the group with PTSD are shown in Table 3. Note : Significance level was set at 0. Due to exploratory nature of the Secondary research goal no adjustment of the significance level for multiple tests in this table was made.. The linear correlation coefficients between the scores on the subjective time experience scales and measures of the intensity of PTSD symptoms in the group with PTSD are shown in Table 4.

At the same time, the correlations of subjective time experience scales with the Mississippi Scale dimensional measure for the intensity of PTSD symptoms are somewhat higher than those obtained between subjective time experience scales and measures of the PTSD symptoms intensity derived from the CAPS. Of all the subjective time experience scales, the Succession , Goal Directedness and Present Concentration scales were found to have statistically significant correlations with at least two criteria for intensity of PTSD symptoms..

Post-Traumatic Stress Disorder (PTSD) | Brain & Behavior Research Foundation

Previous theoretical insights concerning the phenomenological importance of subjective time distortions in PTSD were empirically corroborated in the presented research. Irregularity of succession and unsuccessful time integration, showed to be the important aspects of subjective time alterations in PTSD, instead of the former impressionistic expectations that past perspective would be the prominent temporal feature of this disorder.

Consistent results of the study show that aspects of the disturbed subjective experience of time are not merely picturesque epiphenomena of PTSD clinical manifestations, but could be conceived as specific and empirically measurable features of the inner temporal organization of psychic acts in people with PTSD.

Moreover, it was shown that the disturbances of subjective time are more specific for subjects with PTSD than in group of individuals with other disorders, taken together..

Understanding post-traumatic stress disorder - Professor Chris Brewin

Often authors scrutinizing the problem of subjective time, when developing this concept, have come to the pairs of opposites which expressed the essential moments of dialectical tension. While Ornstein 23 regarded the opposite of succession and simultaneity as a matter of concern only for psychologically oriented philosophers such as Bergson, it is commonly accepted 36 that Janet distinguished between two different ways in which mind functions: activities that preserve and reproduce the past and activities which are directed towards synthesis and creation.

In that sense, a theoretical framework of our paper is based on the distinction between two main aspects of time, expressed as succession and integration.

Post Traumatic Stress Essay

The succession aspect corresponds to a natural intuitive experience of time which, in the stream of contents of consciousness perceptions, performances, memories, concepts, words, feelings etc. In addition, unlike the common misconceptions reducing time to the succession, it is necessary to accept that both aspects of time express its essential determination.

The primary goal of our study was to investigate differences in subjective time experience between individuals with PTSD, those with other psychiatric disorders as well as healthy individuals. Also, there are significant differences in the subjective time experience between the patients with PTSD and those with other disorders in certain aspects measured by the administered time questionnaires Table 2 , which demonstrates the specificity of PTSD in respect of those subjective time distortions assessed by these scales.

With the inclusion of relevant socio-demographic characteristics as covariates in the statistical analysis of the differences between groups regarding the subjective experience of time, the observed differences could not be attributed to differences in the socio-demographic structure of three groups. Not only are the differences obtained on the scales used fully consistent with the expectations, but also the directions of the differences, suggesting that the subjective time experience is more disturbed in those with PTSD than in the group of people with other psychiatric disorders.

On the other hand, the mean values on the Present Concentration scale show the opposite trend: the subjects with PTSD have significantly greater focus on the present than the healthy ones, while it is higher although not significantly than in the group with other disorders. This finding is also in line with expectations, regarding the theoretical assumptions and research findings linking the pronounced focus on the present with a higher level of psychopathology.

Results of previous temporal extension studies in psychiatric disorders, being obtained in different populations and using different methods and terminology are inconsequential and hard to compare. For the group with other disorders this finding could come from the impact of conflicting changes of time extension in a variety of disorders within the group. Our results demonstrate that intuitive expectation of significantly greater extension of the past is not met in the PTSD group..

In terms of speed of subjective passage of time, it was revealed that the size of the deviation from the typical or average results on VA Scale , though present in relation to the healthy subjects, is not specifically related to PTSD compared to the subjects with mixed psychopathology.. Though the time scale correlations could be prima facie expected to be significant with the intrusions cluster, it is not the case here. A likely explanation for this finding could lie in the fact that only one symptom is required to meet Criterion B, as it was the case with a lot of our examinees, which therefore resulted in a shift of frequency distributions of intrusive symptoms towards the lower values reducing the linear correlation coefficient.

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research papers post traumatic stress disorder Research papers post traumatic stress disorder
research papers post traumatic stress disorder Research papers post traumatic stress disorder
research papers post traumatic stress disorder Research papers post traumatic stress disorder
research papers post traumatic stress disorder Research papers post traumatic stress disorder
Research papers post traumatic stress disorder

Related research papers post traumatic stress disorder

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