A short note on the maximal point‐biserial correlation under non‐normality

The aim of this paper is to derive the maximal point‐biserial correlation under non‐normality. Several widely used non‐normal distributions are considered, namely the uniform distribution, t‐distribution, exponential distribution, and a mixture of two normal distributions. Results show that the maximal point‐biserial correlation, depending on the non‐normal continuous variable underlying the binary manifest variable, may not be a function of p (the probability that the dichotomous variable takes the value 1), can be symmetric or non‐symmetric around p = .5, and may still lie in the range from ?1.0 to 1.0. Therefore researchers should exercise caution when they interpret their sample point‐biserial correlation coefficients based on popular beliefs that the maximal point‐biserial correlation is always smaller than 1, and that the size of the correlation is always further restricted as p deviates from .5.     

Jung,Winnicott and the divided psyche

In his review of Memories Dreams Reflections, Winnicott diagnosed Jung as suffering from a psychic split, and characterized the content and the structure of analytical psychology as primarily moulded and conditioned by Jung's own defensive quest for a ‘self that he could call his own’. This pathologizing analysis continues to be endorsed by contemporary Jungian writers. In this paper I attempt to show that Winnicott's critique is fundamentally misguided because it derives from a psychoanalytic model of the psyche, a model that regards all dissociation as necessarily pathological. I argue that Jung's understanding of the psyche differs radically from this model, and further, that it conforms by and large to the kind of dissociative model that we find in the writings of Frederic Myers, William James and Theodor Flournoy. I conclude that a fruitful relationship between psychoanalysis and analytical psychology must depend upon an awareness of these important differences between the two psychic models.     

Coping Strategies and Psychological Outcomes: The Moderating Effects of Personal Resiliency

Certain coping strategies alleviate stress and promote positive psychological outcomes, whereas others exacerbate stress and promote negative psychological outcomes. However, the efficacy of any given coping strategy may also depend on personal resiliency. This study examined whether personal resiliency moderated the effects of task-oriented, avoidance-oriented, and emotion-oriented coping strategies on measures of depression, anxiety, stress, positive affect, negative affect, and satisfaction with life. Results (N = 424 undergraduates) showed higher personal resiliency was associated with greater use of task-oriented coping strategies, which were in turn associated with more adaptive outcomes, and less reliance on nonconstructive emotion-oriented strategies, which in turn were associated with poorer psychological outcomes. In addition, individual differences in personal resiliency moderated the effects of task-oriented coping on negative affect and of emotion-oriented coping on negative affect and depression. Specifically, proactive task-oriented coping was associated with greater negative affect for people lower in personal resiliency. Moreover, high personal resiliency attenuated the negative effects of emotion-oriented coping on depression and negative affect. The effects of avoidance-oriented coping were mixed and were not associated with or dependent on levels of personal resiliency.     

Concurrent cognitive processes in rat serial pattern learning: II. Discrimination learning,rule learning,chunk length,and multiple‐item memories

The current experiment examined the factors that determine acquisition for elements of highly structured serial patterns. Three groups of rats were trained on three patterns with parallel rule‐based hierarchical structure, but with 3‐, 4‐, or 5‐element chunks, each with a final violation element. Once rats mastered their patterns, probe patterns were introduced to answer several questions. To assess the extent to which the learned response pattern depended on intrachamber location cues for anticipating different element types, Spatial Shift Probes shifted the starting lever of patterns to locations that positioned chunk boundaries where they had never been experienced during training. To assess the extent to which a phrasing cue is necessary for rats to perform a chunk‐boundary response, a Cue Removal Probe tested whether rats would produce a chunk‐boundary response in the correct serial position if the phrasing cue was omitted. To assess the extent to which cues from multiple trials leading up to the violation element are required to anticipate the violation element, Multiple‐Item Memory Probes required rats to make an unexpected response on one of the elements in the last two chunks of the pattern prior to the violation element. The results indicated that rats used multiple concurrent learning and memory processes to master serial patterns, including discrimination learning, rule learning, encoding of chunk length, and multiple‐item memories.     

多频稳态诱发电位在伪聋鉴别诊断中的应用

探讨多频稳态诱发电位在伪聋鉴别诊断中的作用。门诊就诊的外伤后主诉单耳听力损伤者41例及正常听力者20例（40耳）,对两组患者分剐进行纯音听阈测试和多频稳态诱发电位测试,对测试结果进行比较。纯音听阈测试结果两组比较有统计学差异（P〈0．01）,多频稳态诱发电位测试结果两组比较无统计学差异（P〉0．05）,提示患者为伪聋。...     

胃癌联合脏器切除

针对一些进展期胃癌患者,胃癌联合脏器切除术不仅可以缓解症状,改善生活质量,甚至有的病例可以达到根治而长期存活。但是胃癌联合脏器切除术难度大,手术死亡率高,并发症多,故胃癌联合脏器术前应恰当地掌握手术指征,充分进行术前准备,正确判断可切除性,充分与患者沟通后周密设计手术方案,术中应进行细致有序的操作,术后应注意及时发现并...     

Can low Behavioral Activation System predict depressive mood?: An application of non‐normal structural equation modeling

Previous studies have reported a negative correlation between the Behavioral Activation System (BAS) and the depressive mood. However, which is the cause and which is the effect cannot be determined simply by evaluating the correlation coefficients. In a series of this study, we used non‐normal structural equation modeling, which could provide a statistically plausible answer to the question on the path direction. We tested for the path direction between the variables of interest by statistically comparing all possible models. The models assuming a unidirectional path from the BAS to the depressive mood were consistently supported. This suggested that low BAS could be a predisposition to developing the depressive mood. These findings could enhance our understanding of the mechanism underlying the development of the depressive mood.     

Testing the efficiency of Markov chain Monte Carlo with People using facial affect categories

Exploring how people represent natural categories is a key step toward developing a better understanding of how people learn, form memories, and make decisions. Much research on categorization has focused on artificial categories that are created in the laboratory, since studying natural categories defined on high-dimensional stimuli such as images is methodologically challenging. Recent work has produced methods for identifying these representations from observed behavior, such as reverse correlation (RC). We compare RC against an alternative method for inferring the structure of natural categories called Markov chain Monte Carlo with People (MCMCP). Based on an algorithm used in computer science and statistics, MCMCP provides a way to sample from the set of stimuli associated with a natural category. We apply MCMCP and RC to the problem of recovering natural categories that correspond to two kinds of facial affect (happy and sad) from realistic images of faces. Our results show that MCMCP requires fewer trials to obtain a higher quality estimate of people's mental representations of these two categories.     

Coming to an end: A case study of an ambiguous process of ending psychotherapy

Aim: When the duration of therapy is not preset and the outcome is a matter for negotiation, the decision to end psychotherapy will be an experiential concern for the two participants. This case study draws attention to how ambiguities may be settled in a process where ending is initiated by the therapist and resisted by the client. Method and analysis: The actual case was strategically selected as exceptional owing to a combination of circumstances. The client and the therapist had developed a ‘good enough’ alliance (WAI) and reached a ‘good enough’ outcome (OQ‐45), and still the client felt she was far from finished. A close inspection of interactional data in sessions together with both clients' and therapists' reflections in post‐therapy interviews elicited information about both substantial content and structural aspects of this complicated process of ending. Findings and discussion: The discrepancy between therapist and client was not addressed, but rather postponed and revisited again later. Structural elements like preparations for a break for vacations and reducing the frequency of sessions were used to test experiential qualities, such as how the client managed life without therapy. Carefully preserving a ‘good enough’ emotional bond through the negotiations seemed important to both parties. Significantly, the client's autonomy was interpreted as the final proof of improvement and the client came to a point where she could affirm that she had got better only by accepting that treatment was coming to an end.     

认知诊断测验中基于信息矩阵的多群组DIF检验

基于改进的Wald统计量,将适用于两群组的DIF检测方法拓展至多群组的项目功能差异（DIF）检验;改进的Wald统计量将分别通过计算观察信息矩阵（Obs）和经验交叉相乘信息矩阵（XPD）而得到。模拟研究探讨了此二者与传统计算方法在多个群组下的DIF检验情况,结果表明：（1）Obs和XPD的一类错误率明显低于传统方法,DINA模型估计下Obs和XPD的一类错误率接近理论水平;（2）样本量和DIF量较大时,Obs和XPD具有与传统Wald统计量大体相同的统计检验力。