Mechanism, Truth, and Penrose's New Argument

Sections 3.16 and 3.23 of Roger Penrose's Shadows of the mind (Oxford, Oxford University Press, 1994) contain a subtle and intriguing new argument against mechanism, the thesis that the human mind can be accurately modeled by a Turing machine. The argument, based on the incompleteness theorem, is designed to meet standard objections to the original Lucas–Penrose formulations. The new argument, however, seems to invoke an unrestricted truth predicate (and an unrestricted knowability predicate). If so, its premises are inconsistent. The usual ways of restricting the predicates either invalidate Penrose's reasoning or require presuppositions that the mechanist can reject.     

The Role of Anxiety Sensitivity Components in Mediating the Relationship Between Childhood Exposure to Parental Dyscontrol and Adult Anxiety Symptoms

This retrospective study investigated the relationship between childhood exposure to parental dyscontrol (i.e., loss of control behaviors) and levels of anxiety sensitivity (AS) components in early adulthood. Four-hundred-and-sixty-five undergraduate students completed self-report measures including the Dyscontrol Experiences Questionnaire. Specificity emerged between AS components and particular dyscontrol experiences. Although exposure to parental dyscontrol related to negative emotional states was significantly positively correlated with all AS dimensions, exposure to parental dyscontrol related to drinking was significantly positively correlated with psychological concerns only. Mediator regression analyses showed AS psychological concerns to play a significant mediating role between parental dyscontrol related to anger and drinking and both general and panic-related anxiety symptoms in the adult offspring. Results suggest that specific parental behaviors may be etiologic in the development of AS, and acquired AS may help explain relations between childhood learning experiences and the development of psychopathological symptoms in young adulthood.     

Individuals with congenital amusia imitate pitches more accurately in singing than in speaking: Implications for music and language processing

In this study, we investigated the impact of congenital amusia, a disorder of musical processing, on speech and song imitation in speakers of a tone language, Mandarin. A group of 13 Mandarin-speaking individuals with congenital amusia and 13 matched controls were recorded while imitating a set of speech and two sets of song stimuli with varying pitch and rhythm patterns. The results indicated that individuals with congenital amusia were worse than controls in both speech and song imitation, in terms of both pitch matching (absolute and relative) and rhythm matching (relative time and number of time errors). Like the controls, individuals with congenital amusia achieved better absolute and relative pitch matching and made fewer pitch interval and contour errors in song than in speech imitation. These findings point toward domain-general pitch (and time) production deficits in congenital amusia, suggesting the presence of shared pitch production mechanisms but distinct requirements for pitch-matching accuracy in language and music processing.     

The effect of category variability in perceptual categorization

Exemplar and distributional accounts of categorization make differing predictions for the classification of a critical exemplar precisely halfway between the nearest exemplars of 2 categories differing in variability. Under standard conditions of sequential presentation, the critical exemplar was classified into the most similar, least variable category, consistent with an exemplar account. However, if the difference in variability is made more salient, then the same exemplar is classified into the more variable, most likely category, consistent with a distributional account. This suggests that participants may be strategic in their use of either strategy. However, when the relative variability of 2 categories was manipulated, participants showed changes in the classification of intermediate exemplars that neither approach could account for.     

The omnipotent child syndrome: the role of passionately held bad fits in the formation of identity.

This article explores the hidden somatic passions that get laid down in the earliest bad fits (i.e., misattunements) and become the source of the highly resistant narcissistic behaviors that support and concretize one's identity. The omnipotent child syndrome is used to define these passionate, somatic, psychic attachments. The "Omnipotent Child," as I call it, is that part of the internal psychic structure that is the final common pathway of all the passionately held bad fits that characterize not only the person's object ties and attachments, but also his or her most powerful internal psychic identity. The importance of the exploration and elucidation of preverbal experiences in the group are crucial to the unfolding of these unhealthy attachments. Recent infant research, coupled with neurobiological advances, supports the idea of the formation for these attachments. The author explores the theoretical underpinnings of this syndrome through case examples of the omnipotent child in the group process.     

Suicidality among high school students in Hong Kong, SAR

Suicide is the leading cause of death in Hong Kong SAR for the youth aged 15-24. This study examined the prevalence of suicidality among secondary school students in Hong Kong using a representative, territory-wide sample of 2,586 students. Suicidal behaviors can be conceptualized as a spectrum of self-destructive behaviors. Cumulative logit model analysis indicated that a range of factors, such as unhappy family life, were associated with increasing levels of suicidality. Use of illicit drugs, inhalants, and tobacco differentiated attempters from ideators. The implications of the research findings are discussed.