The relative contribution of shape and colour to object memory

The current studies examined the relative contribution of shape and colour in object representations in memory. A great deal of evidence points to the significance of shape in object recognition, with the role of colour being instrumental under certain circumstances. A key but yet unanswered question concerns the contribution of colour relative to shape in mediating retrieval of object representations from memory. Two experiments (N=80) used a new method to probe episodic memory for objects and revealed the relative contribution of colour and shape in recognition memory. Participants viewed pictures of objects from different categories, presented one at a time. During a practice phase, participants performed yes/no recognition with some of the studied objects and their distractors. Unpractised objects shared shape only (Rp–Shape), colour only (Rp–Colour), shape and colour (Rp–Both), or neither shape nor colour (Rp–Neither), with the practised objects. Interference effects in memory between practised and unpractised items were revealed in the forgetting of related unpractised items – retrieval-induced forgetting. Retrieval-induced forgetting was consistently significant for Rp–Shape and Rp–Colour objects. These findings provide converging evidence that colour is an automatically encoded object property, and present new evidence that both shape and colour act simultaneously and effectively to drive retrieval of objects from long-term memory

Philipp Melanchthon: A short introduction

Prof. Natie van Wyk is participating in the research project, ‘History of the Netherdutch Reformed Church/Geskiedenis van die Nederduitsch Hervormde Kerk’, directed by Dr Wim Dreyer, Department of Church History and Church Polity, Faculty of Theology, University of Pretoria.Philipp Melanchthon was one of the most influential theologians of the Reformation of the 16th century. He was responsible for transforming the secondary and tertiary educational systems in Germany. He was responsible for a new theological curriculum. He wrote the first Protestant ‘systematic theology’ and was the author of the Confessio Augustana. He is called the ‘teacher of Germany and Europe’. In spite of all the praises, most South Africans know very little about this important theologian. In this year of jubilee, it is imperative that a short introduction to his life and work be published – in the hope that he would receive more attention in future from South African scholars.http://www.hts.org.zaam2017Church History and Church Polic

Selection in spatial working memory is independent of perceptual selective attention, but they interact in a shared spatial priority map

We examined the relationship between the attentional selection of perceptual information and of information in working memory (WM) through four experiments, using a spatial WM-updating task. Participants remembered the locations of two objects in a matrix and worked through a sequence of updating operations, each mentally shifting one dot to a new location according to an arrow cue. Repeatedly updating the same object in two successive steps is typically faster than switching to the other object; this object switch cost reflects the shifting of attention in WM. In Experiment 1, the arrows were presented in random peripheral locations, drawing perceptual attention away from the selected object in WM. This manipulation did not eliminate the object switch cost, indicating that the mechanisms of perceptual selection do not underlie selection in WM. Experiments 2a and 2b corroborated the independence of selection observed in Experiment 1, but showed a benefit to reaction times when the placement of the arrow cue was aligned with the locations of relevant objects in WM. Experiment 2c showed that the same benefit also occurs when participants are not able to mark an updating location through eye fixations. Together, these data can be accounted for by a framework in which perceptual selection and selection in WM are separate mechanisms that interact through a shared spatial priority map

Alien Registration- Maxcey, Mrs. Harold R. (Portland, Cumberland County)

https://digitalmaine.com/alien_docs/23364/thumbnail.jp