Why are damped sounds perceived as shorter than ramped sounds?

Hearing is the most accurate sense for perceiving duration. However, rarely it produces inaccurate estimates of duration, for example when it compares the subjective duration of tones that are increasing in intensity over time (i.e., ramped) with that of tones that are decreasing in intensity over time (i.e., damped). The literature reports that the damped tones are perceived as much being shorter than the ramped tones of the same length. The short subjective duration of damped tones may originate from a decay suppression mechanism that parses the source-informative part of many natural sounds (i.e., the beginning) from the less informative part of them (the decay): listeners may interpret the tail of damped tones like an echo or like the decay portion of an impact sound and exclude it from the account of the duration of the tone. In the natural soundscape, the tail of sounds produced in reverberant environments and the tail of impact sounds have a frequency content that is constant throughout the sound’s duration. Here, the carriers used for ramped and damped sounds were a tone constant in frequency and a tone modulated in frequency. The frequency modulation was introduced to prevent the listener from interpreting the tail of these tones as the result of reverberation or the decay portion of an impact sound. Frequency constant damped tones were largely underestimated in duration whereas frequency modulated ones were not (or were only slightly), demonstrating that the decay suppression mechanism is a worthy explanation for the short subjective duration of damped tones.

     

Sex differences in the behavioral responses of dogs exposed to human chemosignals of fear and happiness

Animal Cognition - This research focuses on sex differences in the behavioral patterns of dogs when they are exposed to human chemosignals (sweat) produced in happy and fear contexts. No age, breed...     

Frustration Discomfort Scale (FDS). A Psychometric Study of the Italian Version

The Frustration Discomfort Scale (FDS, Harrington 2005a) was developed as a multidimensional measure of frustration intolerance. Frustration intolerance plays an important role in behavioral and cognitive model of emotional problems (Harrington 2006). The aim of this study is to translate the original English version of FDS into Italian and to assess the validity and reliability of the Italian version for application among Italian population. The Italian version of FDS-R, with the Hospital Anxiety and Depression Scale were administered on-line to 497 subjects aged from 18 to 66 years old. The exploratory factor analysis suggested a solution with four factors, plus a general factor. The factor analysis supports a multidimensional model of frustration intolerance but the distribution of the items is different. The internal consistency appears optimal for all four factors (range .637–.866). Despite encouraging evidence, the factor structure and other features of the FDS-R are yet to be firmly established.     

Behavioral training and predisposed coping strategies interact to influence resilience in male Long-Evans rats: implications for depression

Effective coping strategies and adaptive behavioral training build resilience against stress-induced pathology. Both predisposed and acquired coping strategies were investigated in rats to determine their impact on stress responsiveness and emotional resilience. Male Long-Evans rats were assigned to one of the three coping groups: passive, active, or variable copers. Rats were then randomly assigned to either an effort-based reward (EBR) contingent training group or a non-contingent training group. Following EBR training, rats were tested in appetitive and stressful challenge tasks. Physiological responses included changes in fecal corticosterone and dehydroepiandrosterone (DHEA) metabolites as well as neuropeptide Y (NPY)-immunoreactivity in the hippocampus and amygdala. Regardless of a rat's predisposed coping strategy, EBR rats persisted longer than non-contingent rats in the appetitive problem-solving task. Furthermore, training and coping styles interacted to yield the seemingly most adaptive DHEA/corticosterone ratios in the EBR-trained variable copers. Regardless of training group, variable copers exhibited increased NPY-immunoreactivity in the CA1 region.     

Clinical Dynamics During Adolescence: Psychoanalytic and Attachment Perspectives

In this essay, we discuss the contribution of psychoanalytic theory and attachment to the understanding of dynamics in adolescence. While psychoanalysis describes adolescence as a period of upheaval that challenges the balance achieved in childhood between Ego and Id and begins the shedding of family dependencies and the loosening of infantile object ties, attachment, on the contrary, considers this period as one characterized by the persistence of strong bonds to parents, which become more complex and articulated. In order to illustrate psychoanalytic and attachment perspective, a clinical vignette of a 17-year-old boy is presented and discussed to consider his difficulties in the area of identity and loss.     

Is attention necessary for perceiving gaze direction? It depends on how you look at it: Evidence from the locus-of-slack method

Several researchers have studied how we process and perceive gaze direction. However, it is still unclear at which perceptual stage of gaze processing (encoding or/and categorization), attention is required to judge gaze direction. We report a study in which we manipulated the difficulty of gaze perceptual judgements (easy vs. difficult) and used the locus-of-slack method to test the role of different types of attention (spatial and central) in the encoding and categorization of gaze direction. In Experiment 1 we used the spatial cueing paradigm to investigate if gaze direction judgements can be carried out while spatial attention is diverted. In Experiment 2 we used the psychological refractory period (PRP) paradigm to determine whether judgement of gaze direction involves central attention processes. The findings demonstrate that gaze judgements require input attention (both for the encoding and categorization stage) but not central attention. The implications of the results are discussed.     

The Gettier Intuition from South America to Asia

Journal of Indian Council of Philosophical Research - This article examines whether people share the Gettier intuition (viz. that someone who has a true justified belief that p may nonetheless fail...