Anticipatory attention during the sleep onset period

To examine whether anticipatory attention or expectancy is a cognitive process that is automatic or requires conscious control, we employed a paired-stimulus event-related potential (ERP) paradigm during the transition to sleep. The slow negative ERP wave observed between two successive stimuli, the Contingent Negative Variation (CNV), reflects attention and expectancy to the second stimulus. Thirteen good sleepers were instructed to respond to the second stimulus in a pair during waking sessions. In a non-response paradigm modified for sleep, participants then fell asleep while tones played. As expected, N1 decreased and P2 increased in amplitude systematically with the loss of consciousness at sleep onset; the CNV was increasingly more positive. Sleep onset latency was correlated with the amplitude of the CNV. The systematic attenuation of the CNV waveform at sleep onset and its absence in sleep indicates that anticipatory attention requires endogenous conscious control.     

Another dragon in the kitchen: Psychological experiences of hepatitis C treatment among HIV‐hepatitis C co‐infected gay men

Background: Increasing numbers of HIV‐infected gay men acquire hepatitis C virus (HCV) co‐infection, which causes serious medical consequences. Treatment for HCV is associated with many severe side effects, in some cases psychological, and many patients subsequently fail to adhere, even when psychological services are utilised, to improve treatment adherence. Objective: This qualitative study aimed to explore the experiences of HIV‐infected gay men undergoing treatment for HCV in order to inform psychological services to better meet specific treatment needs of this population. Methods: Thirteen HIV‐infected gay men who had undergone HCV treatment were interviewed and a qualitative analysis was conducted. Participants described HCV and its treatments in the context of their relationships and lifestyles. Findings: Four domains emerged: HCV diagnosis and treatment; HCV treatment education; change in sense of self; and sexual risk‐taking. Adhering to treatment was a significant challenge for all participants and emerged across all domains. Discussion: Psychological services for this population of co‐infected gay men should assist this clinical population not only with adherence to hepatitis C treatment but should also be available at an earlier stage in the process to help patients make informed choices about whether or not to begin a course of treatment. Assessing factors such as coping strategies, treatment readiness and knowledge, self‐awareness, and level of risk‐taking, can guide clinicians in tailoring treatment and adherence planning for HIV/HCV‐co‐infected gay men.     

先“自我中心”再“调整”:成人推理他人心理状态的加工过程

成人在某些情况下推理他人心理状态时也会像较小的儿童一样出现自我中心化。本研究通过控制完成心理理论任务的反应时间,比较成人被试在有/无时间压力情况下推理他人心理状态时行为表现上的差异。其中,实验1选取24名大学生被试进行指示交流任务(考察视觉观点采择),实验2选取76名大学生被试进行成人版意外地点任务(考察错误信念理解)。结果发现,在限制反应时间的条件下,被试会更加自我中心化。两个实验的结果支持了成人推理他人心理状态可能是一个两阶段的加工过程的假设,即先自我中心再调整:首先以自我心理状态进行自我中心锚定,然后(若自我和他人心理状态存在差异)克服自我中心,理解他人的心理状态。     

青少年网络成瘾研究进展

青少年网络成瘾是信息时代的一种阻碍青少年健康成长的问题。本文对青少年网络成瘾的测量、影响因素及其干预等问题进行综述,并对未来研究方向提出建议,为以后研究提供借鉴。     

Orienting numbers in mental space: Horizontal organization trumps vertical

While research on the spatial representation of number has provided substantial evidence for a horizontally oriented mental number line, recent studies suggest vertical organization as well. Directly comparing the relative strength of horizontal and vertical organization, however, we found no evidence of spontaneous vertical orientation (upward or downward), and horizontal trumped vertical when pitted against each other (Experiment 1). Only when numbers were conceptualized as magnitudes (as opposed to nonmagnitude ordinal sequences) did reliable vertical organization emerge, with upward orientation preferred (Experiment 2). Altogether, these findings suggest that horizontal representations predominate, and that vertical representations, when elicited, may be relatively inflexible. Implications for spatial organization beyond number, and its ontogenetic basis, are discussed.     

Common cues to emotion in the dynamic facial expressions of speech and song

Speech and song are universal forms of vocalization that may share aspects of emotional expression. Research has focused on parallels in acoustic features, overlooking facial cues to emotion. In three experiments, we compared moving facial expressions in speech and song. In Experiment 1, vocalists spoke and sang statements each with five emotions. Vocalists exhibited emotion-dependent movements of the eyebrows and lip corners that transcended speech–song differences. Vocalists’ jaw movements were coupled to their acoustic intensity, exhibiting differences across emotion and speech–song. Vocalists’ emotional movements extended beyond vocal sound to include large sustained expressions, suggesting a communicative function. In Experiment 2, viewers judged silent videos of vocalists’ facial expressions prior to, during, and following vocalization. Emotional intentions were identified accurately for movements during and after vocalization, suggesting that these movements support the acoustic message. Experiment 3 compared emotional identification in voice-only, face-only, and face-and-voice recordings. Emotion judgements for voice-only singing were poorly identified, yet were accurate for all other conditions, confirming that facial expressions conveyed emotion more accurately than the voice in song, yet were equivalent in speech. Collectively, these findings highlight broad commonalities in the facial cues to emotion in speech and song, yet highlight differences in perception and acoustic-motor production.     

The relationship between executive functions,episodic feeling-of-knowing and confidence judgements

Metamemory processes and executive control may be related, given that both are frontally mediated. However, previous behavioural research has been limited in identifying common processes driving this somewhat weak relationship partly because they mostly relied upon global executive measures and composite scores of executive function (EF). The present study investigated the relationship between specific EFs (task shifting, interference resolution), working memory capacity and feeling-of-knowing (FOK) and confidence judgements (CONF) in an episodic memory task. We found that, of the EFs, only task-switching performance was correlated with FOK accuracy and proposed a shared mechanism that may be at play in both task-switching and FOK judgements. We also demonstrated that interference resolution and episodic memory measures were related, suggesting strategic influences on memory retrieval. Finally, we found a strong consistency in the strength and accuracy of FOK and CONF judgements, possibly due to retrieval-based mechanisms in both types of judgements.     

Assessment of a response bias for aggression over functionally equivalent appropriate behavior

We evaluated the effects of a dense (fixed-ratio 1) schedule of reinforcement for an 11-year-old boy's mands for toys while aggression produced the same toys on various schedules chosen on the basis of a progressive-ratio probe. Based on the probe session data, we accurately predicted that aggression would be more probable than mands when the schedules were equal or slightly discrepant, but that mands would be more probable when the schedule discrepancy was large.     

On Categorical Equivalences of Commutative BCK-algebras

A commutative BCK-algebra with the relative cancellation property is a commutative BCK-algebra (X;*,0) which satisfies the condition: if a ≤ x, a ≤ y and x * a = y * a, then x = y. Such BCK-algebras form a variety, and the category of these BCK-algebras is categorically equivalent to the category of Abelian ℓ-groups whose objects are pairs (G, G ₀), where G is an Abelian ℓ-group, G ₀ is a subset of the positive cone generating G ⁺ such that if u, v ∈ G ₀, then 0 ∨ (u - v) ∈ G ₀, and morphisms are ℓ-group homomorphisms h: (G, G ₀) → (G′,G′₀) with f(G ₀) ⫅ G′₀. Our methods in particular cases give known categorical equivalences of Cornish for conical BCK-algebras and of Mundici for bounded commutative BCK-algebras (= MV-algebras). This revised version was published online in June 2006 with corrections to the Cover Date.     

Making the audience a key participant in the science communication process

The public communication of science and technology has become increasingly important over the last several decades. However, understanding the audience that receives this information remains the weak link in the science communication process. This essay provides a brief review of some of the issues involved, discusses results from an audience-based study, and suggests some strategies that both scientists and journalists can use to modify media coverage in ways that can help audiences better understand major public issues that involve science and technology. Carol L. Rogers is editor of the interdisciplinary journal Science Communication.