Auditory Verbal Hallucinations as Dialogical Experiences

The purpose of this study is to offer a model in which auditory verbal hallucinations (AVHs) can be conceptualized as dialogical experiences. This model is of interest in that it integrates several different perspectives (phenomenological, cognitive, social, and evolutionary) and the findings of empirical research on the subject. Hallucinations are understood as the product of a state of consciousness in which the self is dissociated into different positions or perspectives. After reviewing the most relevant results of psychological research, dialogical self theory is proposed as the theoretical framework for understanding hallucinatory experiences. It is argued that the voices possess a series of characteristics, pragmatic properties, relationships with the voices similar to their social surroundings, and more dissociative experiences in people who experience voices than in those who do not, with which they may be considered a dialogical experience. Finally, a model attempting to integrate psychological research on AVHs within the framework of dialogical self theory is presented.     

The Use of Mental Health Services Among Victims of Partner Violence on College Campuses

The present study investigated the relationship between past victimization of different types of intimate partner violence (IPV; physical, psychological, and sexual) and the likelihood of using mental health services. Results indicate 86% of participants reported experiencing some form of IPV, but only 16% of those victims used mental health services to address emotional problems. The participants reported embarrassment, expense, ineffectiveness, and social stigma as the most prominent barriers to seeking help from a mental health professional. The study also found that participants who experienced physical and psychological IPV, but not sexual IPV, reported using mental health services. Sexual IPV may elicit different barriers in help-seeking behaviors. Implications for college IPV prevention programs and mental health services are discussed.     

Frequency and predictability effects in eye fixations for skilled and less-skilled deaf readers

The illiteracy rate in the deaf population has been alarmingly high for several decades, despite the fact that deaf children go through the standard stages of schooling. Much research addressing this issue has focused on word-level processes, but in the recent years, little research has focused on sentence-levels processes. Previous research (Fischler, 1985) investigated word integration within context in college-level deaf and hearing readers in a lexical decision task following incomplete sentences with targets that were congruous or incongruous relative to the preceding context; it was found that deaf readers, as a group, were more dependent on contextual information than their hearing counterparts. The present experiment extended Fischler's results and investigated the relationship between frequency, predictability, and reading skill in skilled hearing, skilled deaf, and less-skilled deaf readers. Results suggest that only less-skilled deaf readers, and not all deaf readers, rely more on contextual cues to boost word processing. Additionally, early effects of frequency and predictability were found for all three groups of readers, without any evidence for an interaction between frequency and predictability.     

Objective assessment of the functional role of spike train correlations using information measures

The functional role of correlations between neuronal spike trains remains strongly debated. This debate partly stems from the lack of a standardized analysis technique capable of accurately quantifying the role of correlations in stimulus encoding. We believe that information theoretic measures may represent an objective method for analysing the functional role of neuronal correlations. Here we show that information analysis of pairs of spike trains allows the information content present in the firing rate to be disambiguated from any extra information that may be present in the temporal relationships of the two spike trains. We validate and illustrate the method by applying it to simulated data with variable degrees of known synchrony, and by applying it to recordings from pairs of sites in the primary visual cortex of anaesthetized cats. We discuss the importance of information theoretic analysis in elucidating the neuronal mechanisms underlying object identification.     

Role of expertise and action in motion extrapolation from real road scenes

The tendency of participants to “remember” the stopping point of an event as being farther along in the direction of motion has been a topic of study for about 30 years. The purpose of the present experiment was to test the influence of two factors on motion extrapolation: (1) The involvement of participants in the action, and (2) their expertise in the domain of automobile driving. Participants viewed real driving scenes from the driver's point of view. They were divided into four groups depending upon their involvement in the action (more or less active) and their driving experience (inexperienced or experienced). In order to get half of the participants involved in the driving situation, they had to use a steering wheel to follow the contour of the road. The results showed that both of these factors increased motion extrapolation. The discussion deals with how the interrelationships between real road scenes, expertise, and action-related knowledge affect motion extrapolation.     

Multisensory self‐motion encoding in parietal cortex

Navigation through the environment requires the brain to process a number of incoming sensory signals, such as visual optical flow on the retina and motion information originating from the vestibular organs. In addition, tactile as well as auditory signals can help to disambiguate the continuous stream of incoming information and determining the signals resulting from one's own set of motion. In this review I will focus on the cortical processing of motion information in one subregion of the posterior parietal cortex, i.e., the ventral intraparietal area (VIP). I will review (1) electrophysiological data from single cell recordings in the awake macaque showing how self‐motion signals across different sensory modalities are represented within this area and (2) data from fMRI recordings in normal human subjects providing evidence for the existence of a functionally equivalent area of macaque area VIP in the human cortex.     

Dissociation of sensory facilitation and decision bias in statistical learning

ABSTRACT

The detection of regularities in the sensory environment, known as statistical learning, is an important brain function that has been observed in many experimental contexts. In these experiments, statistical learning of patterned sensory stimulation leads to improvements in the speed and/or accuracy with which subsequent stimuli are recognized. That is, statistical learning facilitates the transformation of sensory stimuli into motor responses, but the mechanism by which this occurs is unclear. Statistical learning could improve the efficiency of sensory processing, or it could bias responses toward particular outcomes. The distinction is important, as these different hypotheses imply different functions and different neural substrates for statistical learning. Here we address this problem by studying statistical learning as a decision-making process, which allows us to leverage the extensive computational literature on this topic. Specifically we describe a method for applying the Diffusion Decision Model (DDM) to isolate different sensory and cognitive processes associated with decision-making. The results indicate that statistical learning improves performance on a visual learning task in two distinct ways: by altering the efficiency of sensory processing and by introducing biases in the decision-making process. By fitting the parameters of the DDM to data from individual subjects, we find that the prominence of these two factors differed substantially across the population, and that these differences were predictive of individual performance on the psychophysical task. Overall, these results indicate that different cognitive processes can be recruited by statistical learning, and that the DDM is a powerful framework for detecting these influences.     

Sex differences and the own-gender bias in face recognition: A meta-analytic review

We review the literature on sex differences and the own-gender bias in face recognition. By means of a meta-analysis, we found that girls and women remember more faces than boys and men do (g=0.36), and more female faces (g=0.55), but not more male faces (g=0.08); however, when only male faces are presented, girls and women outperform boys and men (g=0.22). In addition, there is female own-gender bias (g=0.57), but not a male own-gender bias (g= ? 0.03), showing that girls and women remember more female than male faces. It is argued that girls and women have an advantage in face processing and episodic memory, resulting in sex differences for faces, and that the female own-gender bias may stem from an early perceptual expertise for female faces, which may be strengthened by reciprocal interactions and psychological processes directing girls' and women's interest to other females.     

Les interventions préventives en santé mentale du jeune enfant vues par leurs bénéficiaires : l’exemple du projet CAPEDP

ObjectiveHome-visiting programs have become one of the most popular early childhood interventions, though their impact on parents and children remain uncertain. Outcomes measures often rely on experimental quantitative design and little space is offered for the voices of those served by these interventions. This paper presents the results of a qualitative protocol performed by the research team with participants in the CAPEDP project which took place in France from 2005 to 2011.MethodAll 184 women who had accepted at least one home visit in the CAPEDP programme were contacted and invited to participate. Individual and group interviews were conducted with the first 16 who accepted to participate. The semi-structured interview schedule addressed their overall appreciation of the project, their initial concerns, the quality of their relationship with their home visiting psychologist, positive and negative aspects of the intervention and any recommendations they might have for future interventions. Interviews were recorded, transcribed and anonymised. An inductive categorical thematic analysis was performed by the research team.ResultsParticipants expressed overall satisfaction with the CAPEDP intervention, underlining the quality of the relationships with the home visitors, usefulness of parental guidance, the fact that the intervention could be adapted to suit their own personal agenda, routine and needs, the importance of learning how to accept help and give help to others. Less positive aspects included the fact that the home visitors were not mothers themselves and that they lacked technical experience, the difficulty ending the relationship at the end of the 27-month project, insufficient integration of fathers, the difficult and time-consuming evaluation protocol and the lack of interaction with other parents during the intervention.ConclusionAlthough mothers who accepted to participate in the qualitative interview schedule may have had a more positive overall experience of the CAPEDP project than those who declined to participate, participants’ points of view provide potentially useful indications for adapting future home-visiting programs to the French context.     

The processing of negations in conditional reasoning: A meta-analytic case study in mental model and/or mental logic theory

We present a meta-analytic review on the processing of negations in conditional reasoning about affirmation problems (Modus Ponens: “MP”, Affirmation of the Consequent “AC”) and denial problems (Denial of the Antecedent “DA”, and Modus Tollens “MT”). Findings correct previous generalisations about the phenomena. First, the effects of negation in the part of the conditional about which an inference is made, are not constrained to denial problems. These inferential-negation effects are also observed on AC. Second, there generally are reliable effects of a negation in the clause referred to by the categorical premise, and these referred-negation effects are constrained to the logically fallacious AC and DA inferences. All findings are presented and discussed in relation to contemporary mental model (MM) and mental logic (ML) theories. It is argued that a double-negation elimination hypothesis provides a sufficient explanation of inferential-negation effects within both MM theory and ML theory, if the latter is extended by a validating search for counter examples. Both MM and ML theories adhere to a processing scheme that allows them to incorporate an account of referred-negation effects based on the thesis that counter-example frequency is modulated by the scope of a contrast class delineated by a false affirmative. We conclude that MM and ML theories provide adequate processing schemes to accommodate for the explanatory hypotheses, at least in principle. In practice, both approaches remain equivocal as regards the connectivity and interactivity with long-term memory knowledge invoked in generating, manipulating, and testing the mental representations of negative state of affairs.