Psychological diagnostics

This article describes techniques and procedures that are used to research the changeblindness phenomenon. The role of stimulus parameters in completing a visual task (detecting changes) was investigated. The following parameters of visual stimuli varied in a chronometric experiment: the number of objects, their location in the stimulus space, and the shape of the objects (including a new object that attracts attention as well as various changes of single objects, such as appearance/disappearance, location shifts, changes of color and shape). The results of this study indicate that change blindness can have a different intensity (the time of detecting changes in flickering images) depending on the number of objects, their location in the stimulus space (structured or randomized), and the type of change (the most complicated one was a change of color):

1. The number of objects has considerable influence on the intensity of change blindness and is the most powerful parameter. 
2. The shape of the objects within the image is not crucial for change-detection time.
3. The spatial organization of the objects is important for the successful detection of changes. The changes are detected quicker in images with regular rather than random organization. 
4. A distraction (in this case, a word that was substituted for an object) doesn’t have any considerable influence on change detection. 
5. Change-detection time increases as the interstimulus interval increases from 200 to 400 ms.
6. The detection of shifts and of appearance/disappearance is quicker than the detection of color change.
   

These results let us create stimulus patterns for change-blindness experiments that differ in complexity, and thus we could examine a wide range of hypotheses about the function of the psychological mechanisms of spatial attention that are used to explain this phenomenon.

In our research we made a substantial psychometric analysis of the scales of F. B. Berezin’s version of the Minnesota Multiphasic Personality Inventory (MMPI), the MMIL, which is widely used in various spheres of psychological practice. Since the mid-1990s in Russia there have been many essential transformations in thinking and values that have been caused by changes in social and economic reality. For this reason, we need to continue our work on specifying the meaning of the MMIL tasks and, then, on updating the test norms and keys. Such psychometric updating is necessary for maintaining the efficiency of the method. For our update, we constructed linear norms for the test; we tested the questionnaire for the normality of the distribution of points; and we checked the validity (including external validity), the reliability coherence of the scales, and the variability of the points. The necessity of readapting the MMIL was thus demonstrated. Questions that display low variability and that are not significantly correlated with the scale they belong to, which reduces their differentiating potential, may be excluded from the test or reformulated.

The aim of the work was to develop and prove a Russian version of the Empathy Quotient, a new tool to measure empathy. A sample of 221 volunteers from the general population filled this questionnaire, the Questionnaire Measure of Emotional Empathy and the Quotient of Empathic Abilities. The coefficients of test-retest reliability, internal consistency and validity were high. In a factor analysis three factors were found that correspond to cognitive, emotional and social skills subscales. A short version with seven questions in each subscale was elaborated and it had acceptable psychometric properties as well.