Memory impairment and Benign Epilepsy with centrotemporal spike (BECTS): A growing suspicion

Benign Epilepsy with centrotemporal spikes (BECTS) is considered a benign type of epilepsy; nevertheless a significant number of children present clear and heterogeneous cognitive deficits such as memory disturbances. Thus far, evidence about memory impairment has been less than conclusive. To clarify the quality of memory functioning in BECTS children, an analysis of existing findings has been conducted trying to identify the type of memory deficits and their underlying factors. Short- and long-term declarative memory are impaired in BECTS children, with both verbal and non-verbal material; co-occurrence of attentional, linguistic and behavioral disturbances is reported. In children with continuous spikes and waves during the slow-wave sleep pattern the normal downscaling of slow-wave activity is absent, disrupting plastic brain processes of sleep-related memory consolidation. In BECTS children, NREM sleep interictal epileptiform discharges (IED) may interfere in the dialogue between temporal and frontal cortex, causing declarative memory deficits: the role of NREM sleep IED acquires a special importance, leading to methodological guidance and suggesting aims for future researches in the field of childhood neuroscience.     

Effects of deterrence on intensity of group identification and efforts to protect group identity

Group identification serves important functions such as motivating group members to work towards group goals and sustaining their efforts to maintain a positive group identity. Thus increasing or decreasing group identification has implications for group members’ commitment to achieving group goals. We propose that group identification and group-level efforts to protect group identity can be reduced or enhanced by deterrents to feeling identified with the ingroup. To test this idea, we exposed participants to different types of deterrents to group identification: a reason for not liking the ingroup (Study 1), difficulty of achieving an ingroup goal (Study 2), and a threat to ingroup positive identity (Study 3). Group identification and strength of efforts to achieve a group goal increased with the strength of deterrence, to the point where it decreased in the strong deterrent condition. Implications for intergroup motivation and social identity are discussed.     

The assessment of subjective visual vertical: comparison of two psychophysical paradigms and age-related performance

Perception of the subjective visual vertical (SVV) is usually assessed by asking to subjects, in complete darkness, to adjust the position of a luminous rod that is variably tilted (i.e., by the method of adjustment [ADJ]). Conversely, the two-alternative forced choice (2AFC) method requires subjects to categorize, as tilted either clockwise (CW) or counterclockwise (CCW), stimuli that are presented on a computer screen and are variably tilted from vertical. In this study, we aimed to compare the results of these two methods and investigate age-related effects on the SVV. SVV was assessed in 102 healthy individuals, 50 women and 52 men, with a mean age of 45.7 (range 20–91), using both ADJ (ten trials, initial 1°, 2°, 4°, 8°, or 12° bar tilts both CW and CCW) and 2AFC (120 stimuli with a 1°–32° variable tilt). Also, 50 of the subjects performed the ADJ test twice, with different bar lengths. We estimated bias and threshold for the two methods, and found that neither measure differed across the methods. Age was a significant predictor of threshold (2AFC, R ² = .141; ADJ, R ² = .190; p < .001), implying lower sensitivity with increasing age. Moreover, the ADJ method showed a significant increase of bias when the initial tilt was farthest from vertical, whereas the rod length was irrelevant. SVV measures obtained with the ADJ and 2AFC methods were comparable, but the latter measures were more resistant to artifacts that might affect the measurement. The lower sensitivity found in older persons may have an influence on their ability to interact with the environment and may contribute to impairment of postural control.     

“Alkie,”“Frat Brother,” and “Jock”: Perceived Types of College Students and Stereotypes About Drinking1

Two studies assessed perceived types of college students and associated stereotypes about drinking. In the first study, 64 university students responded to an open‐ended probe asking them to list types of college students and then rated the amount of drinking done by each of a set of preselected types. In the second study, 236 students responded to the same open‐ended item and directly rated a set of types that had been revised based on Study 1 in terms of drinking and involvement in the academic and sociosexual collegiate subcultures. As hypothesized, consensual responses to the open‐ended probe reflected the college student culture. Also as hypothesized, types of students socially defined in terms of the sociosexual aspects of college (e.g., “fraternity boy”) were rated as likely to drink heavily, whereas types that were seen as being pulled away from college social life, through assumed involvement in academics (e.g., “brain/straight As”), were rated as drinking relatively little. Finally, rated sociosexual involvement was positively correlated, and academic involvement was negatively correlated, with perceived drinking, which supports a central assumption of the framework guiding the research.     

Communicating Science Effectively: When an Optimised Video Communication Enhances Comprehension,Pleasantness, and People’s Interest in Knowing More About Scientific Findings

In two experiments (N = 160) we predicted and found that an optimised video science communication was more effective than either a press release science communication (Experiment 1) and a non-optimised video science communication (Experiment 2) in promoting (a) a better comprehension of the communication, (b) a higher perceived pleasantness, and (c) a stronger manifest interest in learning more about its findings, as reflected in participants’ explicit requests to receive supplemental material on the communicated and analogous findings. The results were consistent across experiments. They were also not influenced by the content type of the communication. Implications for communication professionals and future research in the field of media, social influence, education, and applied social psychology are discussed.     

Progression and Verification of Situation Calculus Agents with Bounded Beliefs

We investigate agents that have incomplete information and make decisions based on their beliefs expressed as situation calculus bounded action theories. Such theories have an infinite object domain, but the number of objects that belong to fluents at each time point is bounded by a given constant. Recently, it has been shown that verifying temporal properties over such theories is decidable. We take a first-person view and use the theory to capture what the agent believes about the domain of interest and the actions affecting it. In this paper, we study verification of temporal properties over online executions. These are executions resulting from agents performing only actions that are feasible according to their beliefs. To do so, we first examine progression, which captures belief state update resulting from actions in the situation calculus. We show that, for bounded action theories, progression, and hence belief states, can always be represented as a bounded first-order logic theory. Then, based on this result, we prove decidability of temporal verification over online executions for bounded action theories.