Weakly aggressive behaviour towards nymphs in the cockroach Schultesia nitor (Blattaria: Zetoborinae)

This paper describes aggressive behaviour in the cockroach Schultesia nitor, a tropical forest species living in bird nests. Young S. nitor nymphs are known to show active dispersal while old nymphs and adults are contrastingly strongly gregarious, a combination of features never observed in other cockroach species. Our laboratory experiments using video recording of confrontations between pairs show that aggressive behaviour towards conspecific nymphs is not exhibited towards nymphs of the species Phoetalia pallida, and thus can be considered species specific in S. nitor. But, it is not kin oriented: the mother and all adults of both sexes in different physiological states exhibit this behaviour as well. Six types of aggressive interactions were discriminated, occurring in age-symmetric pairs of nymphs and adults. Even more frequent aggression was exhibited by adults and last instar nymphs towards younger nymphs of all instars. The frequency of aggressive acts and types of aggressive interactions varied according to sex and size of the two interacting individuals. The possible function and evolution of this behaviour is discussed, with emphasis on the difficulty of interpreting obvious but weak and not kin-biased aggression.     

Preexposure effects in the spatial domain: Dissociation between latent inhibition and perceptual learning

In 4 experiments, rats were given intermixed or blocked preexposure to an array of landmarks that subsequently defined the location of a hidden goal in a Morris pool task. Previous research has shown that intermixed preexposure to pairs of adjacent landmarks retards learning whereas preexposure to individual landmarks facilitates subsequent learning (J. Prados, V. D. Chamizo, & N. J. Mackintosh, 1999). Accordingly, in Experiment 1, intermixed and blocked preexposure to pairs of adjacent landmarks was found to retard learning. In Experiment 2, however, a scheduling effect was found: Rats given intermixed preexposure to the individual landmarks learned faster than rats given blocked or no preexposure. Experiment 3 showed that intermixed (but not blocked) preexposure to pairs of landmarks resulted in a facilitatory effect when preexposure and test were carried out in different contexts. Experiment 4 replicated within a single experiment the main results observed in Experiments 1 and 3. This pattern of results suggests that intermixed preexposure engages learning processes other than latent inhibition that facilitate subsequent learning of the navigation task.     

Freud's prehistoric matrix-Owing 'nature' a death

This paper is informed by contemporary literature in two fields-neonatal research, on the one hand, and the burgeoning interdisciplinary interest in Moses and monotheism, on the other. The author postulates that a cluster of traumatic events during the first two years of Freud's life compelled him to repeat what could not be remembered. Embedded in charged implicit schema, these affects remained unprocessed in Freud, who alone of all psychoanalysts did not have an analysis, manifesting in an uncanny dread/allure of the 'prehistoric' as a dark and dangerous era relating to the archaic feminine/maternal matrix and fratricidal murderousness. Furthermore, she cites evidence to suggest that for Freud this unconsciously excluded subtext of the preoedipal era became associated with ancient Egyptian and Minoan-Mycenaean cultures, a passionate fascination actualized in his collection of antiquities yet incongruously absent in his theoretical work, with three exceptions-Egyptian allusions in Leonardo's unconscious attachment to his archaic mother; the 'Minoan-Mycenaean' analogy on discovering the pre-oedipal mother shortly after the death of Freud's own mother; and Egypt as cradle of humanity in his uncharacteristically rambling, troubled text of Moses and monotheism. The author sees Freud's conceptual avoidance yet compulsive reworking of the prehistoric matrix as a symptomatic attempt to expose early unformulated representations that 'return to exert a powerful effect.'     

Effects of texture and shape on perceived time to passage: knowing "what" influences judging "when"

In the present study, we examined whether it is easier to judge when an object will pass one's head if the object's surface is textured. There are three reasons to suspect that this might be so: First, the additional (local) optic flow may help one judge the rate of expansion and the angular velocity more reliably. Second, local deformations related to the change in angle between the object and the observer could help track the object's position along its path. Third, more reliable judgments of the object's shape could help separate global expansioncaused by changes in distance from expansion due to changes in the angle between the object and the observer. We can distinguish among these three reasons by comparing performance for textured and uniform spheres and disks. Moving objects were displayed for 0.5-0.7 sec. Subjects had to decide whether the object would pass them before or after a beep that was presented 1 sec after the object started moving. Subjects were not more precise with textured objects. When the disk rotated in order to compensate for the orientation-related contraction that its image would otherwise undergo during its motion, it appeared to arrive later, despite the fact that this strategy increases the global rate of expansion. We argue that this is because the expected deformation of the object's image during its motion is considered when time to passage is judged. Therefore, the most important role for texture in everyday judgments of time to passage is probably that it helps one judge the object's shape and thereby estimate how its image will deform as it moves.     

Satisfaction and psychological well-being as antecedents of organisational commitment

Satisfaction and psychological well-being as antecedents of organisational commitment. The role of organisational commitment in public administration and its repercussions on the institution are examined in this study. It reports part of a larger research project that studies job satisfaction, life satisfaction, and psychological well-being as antecedents of organisational commitment. Data were collected from 697 public-sector employees, using questionnaires. Results showed that job satisfaction, life satisfaction, and psychological well-being were strong predictors of organisational commitment. Higher levels of job satisfaction, life satisfaction, and psychological well-being were associated with more favourable perceptions of organisational commitment. Furthermore, this study highlights the impact of dynamic work on the employee's commitment.     

Young mothers' play with their toddlers: individual variability as a function of psychosocial factors

There is no one style of parenting which characterizes young mothers as a group. In addition, life circumstances play an important role in shaping maternal behaviour. The aim of this study was to identify patterns of maternal play behaviour and contextual (social and personal) factors associated with these different patterns. In this study, 107 young mothers were observed at home during play with their toddlers; maternal behaviour was coded for joint attention (shared focus of mother and toddler attention) and emotional availability (e.g. sensitivity, intrusiveness, hostility). Mothers reported on aspects of their childhood history and current personal functioning and social support. A person‐centred analytic approach, using cluster analysis, revealed three distinct groups of maternal play behaviour: (1) ‘sensitive‐engaged’ (2) ‘inconsistent‐directive,’ and (3) ‘intrusive‐prohibitive’. Multivariate analyses revealed that contextual factors in mothers' lives (e.g. childhood abuse, depressive symptomatology, partner violence, social support, and parenting self‐confidence) were differentially associated with parenting clusters. Copyright © 2007 John Wiley & Sons, Ltd.     

Boxing Helena and Corseting Eunice: Sexual Rhetoric in Cosmopolitan and Playboy Magazines

This paper analyzes the sexual rhetorics of Cosmopolitan and Playboy magazines to consider how sexuality is constructed in similar ways by sources directed to men and women. We use Goffman's classifications of gender in advertisements to compare how each magazine uses its pictures to provide cues to readers about sexuality and sexual relationships and to trace changes within each magazine over time. We conclude that both magazines converge on a single construction of sexuality for women. Playboy addresses men and Cosmopolitan addresses women, yet the visual rhetorics of both magazines reflect the male gaze and promote the idea that women should primarily concern themselves with attracting and sexually satisfying men.     

Assessing Psychometric Properties of the Sex-Role Egalitarianism Scale (SRES) with African Americans

The Sex-Role Egalitarianism Scale (SRES) is an instrument reported to be both reliable and valid. SRES was normed primarily on a Caucasian population, and there is little research on its psychometric properties with other ethnic groups. SRES' abbreviated version (BB) was administered to 148 African American men and women. There were no significant differences found between the norming sample and the study's sample. However, significant differences were found between African American men and women at the .01 level with African American women having a more egalitarian attitude. Further research should administer the SRES to a larger, more heterogenous African American sample to further support the psychometric findings of this study. The SRES should also be studied with other ethnic groups.     

Enhancing Children's Spatial and Numerical Skills through a Dynamic Spatial Approach to Early Geometry Instruction: Effects of a 32-Week Intervention

This study describes the implementation and effects of a 32-week teacher-led spatial reasoning intervention in K–2 classrooms. The intervention targeted spatial visualization skills as an integrated feature of regular mathematics instruction. Compared to an active control group, children in the spatial intervention demonstrated gains in spatial language, visual-spatial reasoning, 2D mental rotation, and symbolic number comparison. Overall, the findings highlight the potential significance of attending to and developing young children's spatial thinking as part of early mathematics instruction.     

Optimal testing time for suppression of competitors during interference resolution

Interference between competing memory traces is a common cause of memory failure. Recent research has demonstrated a suppression mechanism that operates at retrieval to resolve interference. Using an adaptation of the suppression paradigm in Healey, Ngo, and Hasher [(2014). Below-baseline suppression of competitors during interference resolution by younger but not older adults. Psychological Science, 25(1), 145–151. doi:10.1177/0956797613501169], we tested whether the ability to suppress competing memory traces varies with the synchrony between optimal arousal period and time of testing. We replicate the below-baseline suppression effect for young adults tested at optimal times of day, and present novel evidence that they do not show competitor suppression during non-optimal times of day. In fact, competitors are actually strengthened at non-optimal times. Our results suggest that the ability to resolve interference by suppression varies with circadian arousal.