The perception of a changing shape

Under specified conditions a pair of simple shapes are matched by a subject when almost all supplementary textural and space cues of depth vision have been removed. Under such conditions it is found that shape constancy is no longer present. However, the effect of regular rotatory motion of the shape is sufficient to restore constancy in the continued absence of other cues. Degree of perceptual constancy appears to be correlated with rate of change of shape. It is suggested that an explanation of the phenomenon is to be sought along the lines of Michotte's concept of “object creation” rather than in terms of gradient variables.     

Feeding the Hungry Other: Levinas,Breastfeeding, and the Politics of Hunger

Breastfeeding has become a subject of moral concern as its benefits have become well known. Encouraging mothers to breastfeed has been the goal of extensive public health promotion efforts. Emmanuel Levinas makes absolute responsibility to the Other central to his ethics, with giving food to the Other the paradigmatic ethical act. However, Levinas also provides an important critique of the autonomous individual who is taken for granted by breastfeeding promotion efforts. I argue that the ethical obligation to feed the hungry child must be recognized as coextensive with meeting the needs of women, especially given the current absence of important social and economic supports for breastfeeding. Under a Levinasian framework, each of us is ethically responsible for feeding children; this responsibility is not limited to mothers. This ethical responsibility needs to be expressed through improving social and economic supports necessary for those individuals who wish to breastfeed, instead of attempting to convince women to breastfeed. This ethical responsibility must also be understood in a broader context of a politics of hunger, which provides access to quality food for all, and goes beyond mere nutrition to include the importance of culture, touch, and intimacy in the enjoyment of food—what Levinas calls “good soup.”     

Determinants of cognitive outcomes of perinatal and childhood stroke: A review

Our understanding of cognitive and behavioral outcomes of perinatal and childhood stroke is rapidly evolving. A current understanding of cognitive outcomes following pediatric stroke can inform prognosis and direct interventions and our understanding of plasticity in the developing brain. However, our understanding of these outcomes has been hampered by the notable heterogeneity that exists amongst the pediatric stroke population, as the influences of various demographic, cognitive, neurological, etiological, and psychosocial variables preclude broad generalizations about outcomes in any one cognitive domain. We therefore aimed to conduct a detailed overview of the published literature regarding the effects of age at stroke, time since stroke, sex, etiology, lesion characteristics (i.e., location, laterality, volume), neurologic impairment, and seizures on cognitive outcomes following pediatric stroke. A key theme arising from this review is the importance of interactive effects among variables on cognitive outcomes following pediatric stroke. Interactions particularly of note include the following: (a) age at Stroke x Lesion Location; (b) Lesion Characteristics (i.e., volume, location) x Neurologic Impairment; (c) Lesion Volume x Time Since Stroke; (d) Sex x Lesion Laterality; and (e) Seizures x Time Since Stroke. Further, it appears that these relationships do not always apply uniformly across cognitive domains but, rather, are contingent upon the cognitive ability in question. Implications for future research directions are discussed.     

Automatic attentional orienting to other people’s gaze in schizophrenia

Explicit tests of social cognition have revealed pervasive deficits in schizophrenia. Less is known of automatic social cognition in schizophrenia. We used a spatial orienting task to investigate automatic shifts of attention cued by another person’s eye gaze in 29 patients and 28 controls. Central photographic images of a face with eyes shifted left or right, or looking straight ahead, preceded targets that appeared left or right of the cue. To examine automatic effects, cue direction was non-predictive of target location. Cue–target intervals were 100, 300, and 800?ms. In non-social control trials, arrows replaced eye-gaze cues. Both groups showed automatic attentional orienting indexed by faster reaction times (RTs) when arrows were congruent with target location across all cue–target intervals. Similar congruency effects were seen for eye-shift cues at 300 and 800?ms intervals, but patients showed significantly larger congruency effects at 800?ms, which were driven by delayed responses to incongruent target locations. At short 100-ms cue–target intervals, neither group showed faster RTs for congruent than for incongruent eye-shift cues, but patients were significantly slower to detect targets after direct-gaze cues. These findings conflict with previous studies using schematic line drawings of eye-shifts that have found automatic attentional orienting to be reduced in schizophrenia. Instead, our data indicate that patients display abnormalities in responding to gaze direction at various stages of gaze processing—reflected by a stronger preferential capture of attention by another person’s direct eye contact at initial stages of gaze processing and difficulties disengaging from a gazed-at location once shared attention is established.     

Anger After Childbirth: An Overlooked Reaction To Postpartum Stressors

Other than postpartum depression, little is known about women's emotional responses to childbirth and subsequent stressors. Anger was explored on the basis of theory and evidence that it is a likely emotional response in this context. During their third trimester of pregnancy and approximately six weeks after delivery, 163 participants completed the Beck Depression Inventory and the anger subset of the Affect Balance Scale. A number of childbirth–relevant variables were examined as predictors of postpartum emotional response, controlling for prepartum levels and for the association between anger and depressed mood. As expected, a substantial group of women reported high levels of anger irrespective of depressed mood. Although the majority of variables predicted depressed mood, childcare stress, age, and religious self–identification were independently predictive of postpartum anger (all p values > .05). Implications for research and clinical intervention are discussed.     

A consequentialist account of Narveson’s dictum

Philosophical Studies - In population ethics, Narveson’s dictum states: morality favours making people happy, but is neutral about making happy people. The thought is intuitively appealing;...     

Sociocultural developmental approaches to autobiographical memory

The sociocultural developmental model of autobiographical memory development has been a highly generative theoretical framework over the past 30 years, garnering both a great deal of empirical attention and support. In this article, the author details the theoretical framework and reviews the empirical evidence that indicates that individual differences in maternal reminiscing style has profound and enduring implications for the development of autobiographical memory. Concurrent, longitudinal, and experimental intervention research has demonstrated that mothers who reminisce in more highly elaborated ways with their preschool children facilitate the development of more elaborate and coherent autobiographical memories.     

Olfactory discrimination between litter mates by mothers and alien adult cats: lump or split?

Animal Cognition - Mother cats can discriminate between their own and alien kittens using kittens’ body odour. Here we ask whether they can also distinguish between body odours of kittens...