Genetic Counseling and Testing for FSHD (Facioscapulohumeral Muscular Dystrophy) in the Israeli Population

Facioscapulohumeral muscular dystrophy (FSHD), is a dominantly inherited, late onset, progressive disease. At present, no treatment or prevention of symptoms are available. There is considerable clinical variability, even within families. The gene whose defect causes FSHD has not been identified, but molecular diagnosis can be made by analyzing D4Z4 repeat length on chromosome 4q35. The results can support or rule out the clinical diagnosis of FSHD, but there are also "gray zone", non-conclusive results. During the years 2000-6, 66 individuals (including 7 asymptomatic individuals), were tested in our institute for D4Z4 repeat number. In 77% of the cases the results were conclusive: two thirds of them supported a diagnosis of FSHD while in a third this diagnosis was ruled out. In 23% the results were in the gray zone. Cognitive involvement was rare, occurring only when the D4Z4 repeat size was very small (<15 kb). Maximal utilization of the existing molecular test for FSHD demands detailed clinical and family pedigree information. We recommend that comprehensive genetic counseling always be given before and after molecular testing for FSHD, in addition to the neurological follow-up. Presymptomatic testing should only be offered when complete molecular evaluation can be offered, including 4qA and 4qB variant analysis.     

Towards a cognitive resource limitations model of diminished expression in schizotypy

Diminished expression of speech is a pernicious feature of both schizophrenia and schizotypy--defined as the personality organization reflecting a putative genetic schizophrenia liability. As yet, the mechanism underlying diminished expression is unclear. We tested the hypothesis that diminished expression reflects a cognitive resource issue--that is, as cognitive resources are depleted, expression becomes diminished in individuals with psychometrically defined schizotypy. Acoustic analysis of natural speech was procured during experimentally manipulated baseline and high cognitive-load dual tasks and examined in 38 individuals with psychometrically defined schizotypy and 34 controls. For both groups, expression significantly decreased as a function of increased task demands, although there were no group differences in expression or magnitude of change across baseline to high cognitive-load conditions. Participants with self-reported constricted affect showed significant reductions in expression under high-load versus baseline speaking conditions relative to other schizotypal and control participants. Moreover, psychometrically defined schizotypal participants with poor cognitive performance on the high-load task, suggestive of depleted cognitive resources, also showed expressivity reductions compared with other participants. These findings suggest that diminished expression occurs as a function of limited cognitive resources in psychometrically defined schizotypy.     

Status conferral in intergroup social dilemmas: behavioral antecedents and consequences of prestige and dominance

Bridging the literatures on social dilemmas, intergroup conflict, and social hierarchy, the authors systematically varied the intergroup context in which social dilemmas were embedded to investigate how costly contributions to public goods influence status conferral. They predicted that contribution behavior would have opposite effects on 2 forms of status-prestige and dominance-depending on its consequences for the self, in-group and out-group members. When the only way to benefit in-group members was by harming out-group members (Study 1), contributions increased prestige and decreased dominance, compared with free-riding. Adding the option of benefitting in-group members without harming out-group members (Study 2) decreased the prestige and increased the dominance of those who chose to benefit in-group members via intergroup competition. Finally, sharing resources with both in-group and out-group members decreased perceptions of both prestige and dominance, compared with sharing them with in-group members only (Study 3). Prestige and dominance differentially mediated the effects of contribution behavior on leader election, exclusion from the group, and choices of a group representative for an intergroup competition. Taken together, these findings show that the well-established relationship between contribution and status is moderated by both the intergroup context and the conceptualization of status.     

Fundamental(ist) attribution error: Protestants are dispositionally focused

Attribution theory has long enjoyed a prominent role in social psychological research, yet religious influences on attribution have not been well studied. We theorized and tested the hypothesis that Protestants would endorse internal attributions to a greater extent than would Catholics, because Protestantism focuses on the inward condition of the soul. In Study 1, Protestants made more internal, but not external, attributions than did Catholics. This effect survived controlling for Protestant work ethic, need for structure, and intrinsic and extrinsic religiosity. Study 2 showed that the Protestant-Catholic difference in internal attributions was significantly mediated by Protestants' greater belief in a soul. In Study 3, priming religion increased belief in a soul for Protestants but not for Catholics. Finally, Study 4 found that experimentally strengthening belief in a soul increased dispositional attributions among Protestants but did not change situational attributions. These studies expand the understanding of cultural differences in attributions by demonstrating a distinct effect of religion on dispositional attributions.     

Is Searching for Meaning in Life Associated With Reduced Subjective Well-Being? Confirmation and Possible Moderators

Meaning in life has been identified as an important element of well-being. Recently attention has been directed to examining the differences between having meaning in life and searching for meaning in life. Theory has speculated that if an individual is searching for meaning in life, he/she may be distressed. Researchers of late have begun to focus on the process of searching for meaning in life to gain a better understanding of the individual differences which may exist. Interest has also been directed towards exploring whether any moderators of the possible negative effects of the searching process may exist. This research investigated the hypothesised negative link between high levels of searching for meaning in life and subjective well-being and the positive moderating effects of presence of meaning in life while also exploring the influence of the demographic variables which were treated as control variables. From an exploratory stance further analysis examined the hypothesised positive moderating effects of self-actualisation, self-efficacy and achievement motives on the relationship between searching for meaning and subjective well-being. One study (n?=?500) was conducted to assess the hypothesized relationships. The study confirmed the negative relationship between high levels of searching for meaning in life and subjective well-being and positive moderating effects that presence of meaning in life and self-actualisation have on happiness scores when individuals are searching for meaning in life. Self-efficacy and achievement motives were shown to have no significant moderating effects on searching for meaning in life and subjective wellbeing. Overall the results suggest that individuals who record high levels of searching for meaning in life are protected from the negative outcomes of this process by holding high levels of presence of meaning in life and self-actualisation.     

Value-based modulation of memory encoding involves strategic engagement of fronto-temporal semantic processing regions

A number of prior fMRI studies have focused on the ways in which the midbrain dopaminergic reward system coactivates with hippocampus to potentiate memory for valuable items. However, another means by which people could selectively remember more valuable to-be-remembered items is to be selective in their use of effective but effortful encoding strategies. To broadly examine the neural mechanisms of value on subsequent memory, we used fMRI to assess how differences in brain activity at encoding as a function of value relate to subsequent free recall for words. Each word was preceded by an arbitrarily assigned point value, and participants went through multiple study–test cycles with feedback on their point total at the end of each list, allowing for sculpting of cognitive strategies. We examined the correlation between value-related modulation of brain activity and participants’ selectivity index, which measures how close participants were to their optimal point total, given the number of items recalled. Greater selectivity scores were associated with greater differences in the activation of semantic processing regions, including left inferior frontal gyrus and left posterior lateral temporal cortex, during the encoding of high-value words relative to low-value words. Although we also observed value-related modulation within midbrain and ventral striatal reward regions, our fronto-temporal findings suggest that strategic engagement of deep semantic processing may be an important mechanism for selectively encoding valuable items.     

The Effects of Magnitude-Based Differential Reinforcement on the Skill Acquisition of Children with Autism

A common recommendation for teaching skills to children with autism is to apply differential reinforcement by reserving high-quality reinforcement for unprompted responses (Sundberg and Partington in Teaching language to children with autism or other developmental disabilities, Behavior Analysts Inc., Pleasant Hill, 1998). Earlier research focuses primarily on schedules or quality of reinforcement, rather than magnitude of reinforcement, when evaluating the use of differential reinforcement in practice. The utility of magnitude-based differential reinforcement may be dependent upon evidence that a learner responds differentially to large and small amounts of reinforcement such that he or she selects the large amount of reinforcement over the small amount of reinforcement and engages in more responses that produce the relatively larger magnitude reinforcement. Three individuals with autism participated in a treatment comparison of differential reinforcement. The manipulation of magnitude of differential reinforcement in a skill acquisition program did not have an appreciable effect on the rate of acquisition for any of the three participants.     

Recognition and retrieval of proper names: Age differences in the fan effect

Abstract

A spreading activation model was applied, to explain. some aspects of retrieval failure for proper names. The fact that retrieval failures occur more frequently for well-known names than for unfamiliar names, and the increased incidence of name blocking in the elderly, are both interpreted in terms of the fan effect. Fanning is created when multiple far are known about a single person and results in slower and more error-prone retrieval, but the fan effect can be counteracted if the facts form an integrated set. Three groups of subjects—young, middle-aged, and elderly—learned sets of name-attribute statements in three conditions. In the no-fan condition, each name was uniquely paired with a single attribute; in the fan condition, each name was linked with three different attributes; in the crossed-fan condition, different names shared some of the same attributes. Verification RTs and cued recall responses showed that all subjects found the crossed-fan condition most difficult, but, when name-attribute links were not crossed, young and middle-aged subjects were able to counteract the fan effect by integrating the facts into a unified representation. Elderly subjects were less able to integrate effectively and were more susceptible to the fan effect.     

An objective counterfactual theory of information

We offer a novel theory of information that differs from traditional accounts in two respects: (i) it explains information in terms of counterfactuals rather than conditional probabilities, and (ii) it does not make essential reference to doxastic states of subjects, and consequently allows for the sort of objective, reductive explanations of various notions in epistemology and philosophy of mind that many have wanted from an account of information.