Assessing the impact of replication on implicit association test effect by means of the extended logistic model for the assessment of change

The present study consists of a longitudinal investigation in which implicit association measures were collected by means of the implicit association test (IAT), with the purpose of assessing the impact of replication on the test effect with the same participants. The extended logistic model for the assessment of change (ELMAC), a procedure that belongs to Rasch modeling, was applied. By means of the ELMAC application, the existence of latent traits characteristic of the impact on the IAT effect (due to replication through time) is shown; more precisely, the model time parameters show the decrement of the IAT effect through time, due to the decrease of the implicit preference in both conditions, compatible and incompatible, associated with sweet foods and salty foods. The results confirm that in the long run, the incompatible condition latency may approach the compatible condition latency, causing a significant attenuation of the IAT effect.     

Walking in an environment of moving ground texture

The visual control of global body movements has mainly been studied in terms of the maintenance of balance. The present experiment examined the effect of moving visual surroundings on the speed of locomotion. A virtually boundless optical environment was generated by the projection of a dotted texture on the ground that was reflected on large vertical mirrors fixed along the walls of the room. Subjects' head velocity was recorded over a walking path of about 10 m along the projection surface. In the experimental sessions, the texture was animated and moved at different speeds in the same direction as the subject or in the opposite direction. In the control condition, the projected texture remained motionless and therefore appeared to pass by at the subjects' walking speed. The subjects' task was to maintain a constant walking speed as far as possible over the different conditions. Changes in walking speed give indications of how the processing of optical flow modulates locomotor activity.     

A two-dimensional computer-controlled visual stimulator

A computer-controlled instrument that creates complex two-dimensional patterns on a CRT monitor is described. These patterns are used to elicit visual evoked responses. Patterns are produced on a raster that is rotatable about its center. It is possible to assign to arbitrary regions in the raster any of four independent one-dimensional spatial-temporal functions. For each spatial-temporal function, the experimenter can select an arbitrary spatial profile, the spatial frequency of the profile, the starting phase of the profile, the temporal function, and the depth of modulation.     

Psychological well-being of patients with insomnia and its relationship with anxiety and depression

The aims of the present study are to evaluate the impact of insomnia on psychological well-being and to examine the associations of insomnia and psychological well-being with anxiety and depression. Forty-one patients attending our hospital-based Centre for sleep medicine were administered scales for the evaluation of insomnia (ISI), anxiety (STAI-Y), depression (BDI-II) and psychological well-being (PWB). The scores were compared to those of a control group of 68 subjects attending the hospital for routine examinations or as accompanying persons. Significant differences between patients and controls were detected for anxiety and depression, as well as for psychological well-being. Even if subclinical on average, anxiety and depression symptoms were significantly related to poor psychological well-being, whereas insomnia per se was not. These findings suggest that patients with insomnia report a relevant impact on their psychological well-being, and that such an impact seems to be strongly associated with concomitant subthreshold symptoms of anxiety and depression. The implications for diagnosis and treatment are discussed.     

The many-facet Rasch model in the analysis of the go/no-go association task

This article provides a many-facet Rasch measurement (MFRM) analysis of go/no-go association task (GNAT)-based measures of implicit attitudes toward sweet and salty food. We describe the statistical model and the strategy we adopted to score the GNAT, and we emphasize that, when analyzing implicit measures, MFRM indexes have to be interpreted in a peculiar way. In comparison with traditional scoring algorithms, an MFRM analysis of implicit measures provides some additional information and suffers from fewer limitations and assumptions. MFRM might help to overcome some limitations of current implicit measures, since it directly addresses some known issues and potential confounds, such as those related to a rational zero point, to the arbitrariness of the metric, and to participants’ task-set switching ability.     

Psychopathy in Italian female murderers

Over the years, the number of homicides in Italy has progressively decreased, ultimately becoming one of the lowest rates in Europe (357 = 0.7 per 100,000 inhabitants in 2017, according to ISTAT 1 ISTAT: Italian Institute of Statistics.
). The number of homicides committed by women was about 9% of the total number of homicides during our study period. The percentage has increased in recent years because the total number of homicides has decreased without a proportionate decrease in the number of female homicides. Indeed, murder is an unusual type of crime for a woman and is often associated with a mental disorder, so when a woman committed a homicide, a psychiatric assessment was often performed. A forensic psychiatry expert was assigned to investigate the offender's psychopathology and mental state at the time of the offense. The root causes of the crime remained unexplained, however, due to the lack of a psychiatric precedent to justify this kind of assessment. The role of psychopathy in homicide has seldom been studied in female offenders, even though psychopathy has an important role in violent crimes. The investigators examined, clinically and historically, a sample of women who committed murder with different levels of criminal responsibility (female homicide offenders found not guilty by reason of insanity, having partial criminal responsibility, and convicted as criminally responsible and sentenced to prison) to identify the prevalence of the psychopathic dimension and its possible role in this sample. Prevalence and degree of psychopathic traits were examined in these female offenders using the Psychopathy Checklist‐Revised. This study showed that females who had committed homicide were likely to suffer from mental illness; most of the homicidal acts were committed impulsively; and most female homicides occurred within the family, especially among women who were psychotic, but less so if they were psychopathic. Psychopathy tended to co‐occur more with personality disorders than with psychotic psychopathology. Psychopathy was more evident among female homicide offenders who had been abused or traumatized. Psychopathic women who killed had high factor F1 scores and low antisocial component of factor F2.