A decade of research and services for homeless mentally ill persons. Where do we stand?

Over the past decade, researchers have documented the range of needs and devised new methods for increasing our understanding of the homeless severely mentally ill population. Clinicians have developed an appreciation of the difficulty and complexity of effectively treating this population, and policymakers have become increasingly aware of the barriers to developing services and housing. In this article, the progress-to-date in research, the evolution of new service approaches, and the development of federal, state, and local policies to meet the needs of homeless mentally ill individuals are assessed. The many challenges that remain are also considered.     

Cognitive neuroscience of episodic memory encoding

This paper presents a cognitive neuroscientific perspective on how human episodic memories are formed. Convergent evidence from multiple brain imaging studies using positron emission tomography (PET) and functional magnetic resonance imaging (fMRI) suggests a role for frontal cortex in episodic memory encoding. Activity levels within frontal cortex can predict episodic memory encoding across a wide range of behavioral manipulations known to influence memory performance, such as those present during levels of processing and divided attention manipulations. Activity levels within specific frontal and medial temporal regions can even predict, on an item by item basis, whether an episodic memory is likely to form. Furthermore, separate frontal regions appear to participate in supplying code-specific information, including distinct regions which process semantic attributes of verbal information as well as right-lateralized regions which process nonverbal information. We hypothesize that activity within these multiple frontal regions provides a functional influence (input) to medical temporal regions that bind the information together into a lasting episodic memory trace.     

Gendered themes in family reminiscing

Previous research conducted in laboratory settings has shown reliable gender differences in autobiographical memory. However, these studies have primarily focused on structural or emotional aspects of memory narratives told to an unfamiliar experimenter. The present study extends this literature by investigating gender differences in social references and interpersonal themes in parent-child narratives about the past. Participants were 17 white, middle-class children and their mothers and fathers, who were interviewed when children were 40 and 70 months of age. Parent-child narratives about shared activities in the past, as well as narratives about parents' own childhood, were examined. Results indicated that when discussing shared events, both parents talked in similar ways across children, although fathers referred to self more than mothers. However both parents referred to their girls more than their boys. Regarding event themes, parents discussed more social events with girls than with boys. Children themselves showed different gendered patterns; girls mentioned self and others, and relationships more than boys did, and children mentioned self and others more often when talking with fathers than with mothers. With respect to narratives about parents' childhood experiences, however, no gender differences were observed, save that parents referred to others more often in retrospective narratives told to girls than to boys. These findings suggest that gendered behaviours are best understood within the specific contexts and purposes of relational interactions.     

Does the right hemisphere take over after damage to Broca's area? the Barlow case of 1877 and its history

In 1877 Thomas Barlow, a London physician, published a remarkable case of functional recovery of speech following brain damage. It involved a 10-year-old boy who had lost his speech, regained it, and lost it again before he died from a disorder that affected his heart and produced embolisms that subsequently affected other organs, including his brain. Examination of the boy's brain revealed two focal regions of softening; one that affected Broca's area and the left facial-motor area, and another, which occurred weeks later, in the homologous regions of the right hemisphere. Although Barlow was most concerned with motor deficits, others at the turn of the century began to cite this case as strong evidence that the corresponding region of the right hemisphere can take over speech functions for Broca's area on the left. Whether this case really provides good support for functional takeover or vicariation theory is critically evaluated in the light of contemporary research, including PET scan studies involving damage to Broca's speech region.     

Willingness to Seek Treatment Among Black Students With Anxiety or Depression: The Synergistic Effect of Sociocultural Factors With Symptom Severity and Intolerance of Uncertainty

Anxiety and depressive disorders are among the most commonly diagnosed psychiatric disorders, yet they remain largely undertreated in the U.S. and Black adults are especially unlikely to seek or receive mental health services. Symptom severity has been found to impact treatment-seeking behaviors as have sociocultural factors. Yet no known research has tested whether these factors work synergistically to effect willingness to seek treatment. Further, emerging data point to the importance of transdiagnostic risk factors such as intolerance of uncertainty (IU). IU may be negatively related to seeking treatment given that Black adults may be uncertain whether treatment might benefit them. Thus, the current study examined the relations between symptom severity/IU and willingness to seek treatment for anxiety/depression problems and the impact of key sociocultural variables (i.e., cultural mistrust–interpersonal relations [CMI-IR], perceived discrimination [PED]) on these relations among 161 (85% female) Black undergraduates. Consistent with prediction, symptom severity was positively related to willingness, but unexpectedly, IU was positively related. There was a significant Symptom Severity × CMI-IR interaction such that severity was positively related to willingness among students with lower cultural mistrust, but not higher mistrust. There were also significant IU × PED interaction such that IU was positively related to willingness among students with lower PED, but not higher PED. Results highlight the importance of considering the interplay between symptom severity, transdiagnostic vulnerability factors, and sociocultural variables when striving to identify factors related to treatment seeking behaviors among anxious and/or depressed Black students.     

Empiricism without magic: transformational abstraction in deep convolutional neural networks

In artificial intelligence, recent research has demonstrated the remarkable potential of Deep Convolutional Neural Networks (DCNNs), which seem to exceed state-of-the-art performance in new domains weekly, especially on the sorts of very difficult perceptual discrimination tasks that skeptics thought would remain beyond the reach of artificial intelligence. However, it has proven difficult to explain why DCNNs perform so well. In philosophy of mind, empiricists have long suggested that complex cognition is based on information derived from sensory experience, often appealing to a faculty of abstraction. Rationalists have frequently complained, however, that empiricists never adequately explained how this faculty of abstraction actually works. In this paper, I tie these two questions together, to the mutual benefit of both disciplines. I argue that the architectural features that distinguish DCNNs from earlier neural networks allow them to implement a form of hierarchical processing that I call “transformational abstraction”. Transformational abstraction iteratively converts sensory-based representations of category exemplars into new formats that are increasingly tolerant to “nuisance variation” in input. Reflecting upon the way that DCNNs leverage a combination of linear and non-linear processing to efficiently accomplish this feat allows us to understand how the brain is capable of bi-directional travel between exemplars and abstractions, addressing longstanding problems in empiricist philosophy of mind. I end by considering the prospects for future research on DCNNs, arguing that rather than simply implementing 80s connectionism with more brute-force computation, transformational abstraction counts as a qualitatively distinct form of processing ripe with philosophical and psychological significance, because it is significantly better suited to depict the generic mechanism responsible for this important kind of psychological processing in the brain.     

Social anxiety and problematic alcohol consumption: the mediating role of drinking motives and situations

Social anxiety is inconsistently associated with alcohol use variables. To elucidate factors that contribute to the relationship between social anxiety and problematic alcohol use, the present study investigated drinking motives and drinking situations in an undergraduate sample (N = 293). Social anxiety was significantly correlated with endorsement of enhancement drinking motives (i.e., drinking to enhance positive experiences or emotions) but not social or coping motives. Social anxiety was also correlated with endorsement of drinking in the following high-risk situations: unpleasant emotions, conflict with others, social pressure, and testing personal control. Importantly, enhancement motives and each of these drinking situations mediated the relationship between social anxiety and alcohol-related problems. Findings suggest that alcohol use to enhance positive affect or in response to these specific situations may account for the risk for alcohol-related problems among those with social anxiety.     

Humean dispositionalism

Humean metaphysics is characterized by a rejection of necessary connections between distinct existences. Dispositionalists claim that there are basic causal powers. The existence of such properties is widely held to be incompatible with the Humean rejection of necessary connections. In this paper I present a novel theory of causal powers that vindicates the dispositionalist claim that causal powers are basic, without embracing brute necessary connections. The key assumptions of the theory are that there are natural types of causal processes, and that manifestations of powers are identified with certain kinds of causal processes. From these assumptions, the modal features of powers are explained in terms of internal relations between powers themselves and the process-types in which powers are manifested.     

Beyond HERA: Contributions of specific prefrontal brain areas to long-term memory retrieval

Recent neuroimaging studies have provided a wealth of information about areas within prefrontal cortex involved in long-term memory. These studies prompted a proposal by Tulving and colleagues (Tulving, Kapur, Craik, Habib, & Houle, 1994) that prefrontal contributions to memory function are related to laterality differences (the hemispheric encoding/retrieval asymmetry model). This review goes beyond a general characterization of prefrontal lobes to a more specific analysis of distinct areas within the prefrontal cortex. Separate prefrontal areas, sometimes within the same hemisphere, are discussed in terms of selective contributions that they might make to memory retrieval. In the end, it is concluded that a framework which tries to understand prefrontal function in terms of specific areas is a useful complement to models, like HERA, which attempt to find unifying principles across multiple areas.     

Self-Ratings of Personality: A Naturalistic Comparison of Normative, Ipsative, and Idiothetic Standards

ABSTRACT The purpose of this research is to examine some of the implicit standards that individuals may use when they rate themselves on personality dimensions Specifically, we compared ratings based on instructions that specified normative, ipsative, or idiothetic creteria with ratings obtained when subjects used their own (implicit) standards In a series of three studies, we found that each of the explicit ratings was highly similar to the implicit-standard ratings and that there were substantial individual differences in the relative similarity of each of the explicit ratings to the implicit ratings However, because the normative instructions elicited less extreme responses than any of the other instructions, there was a small but consistent tendency for them to be less similar to the ratings based on implicit standards than the ipsative or idiothetic ratings The implications of this research for personality assessment and self-evaluation are discussed