Rorschach Comprehensive System data for a sample of 100 adult nonpatients from the Belgian French-speaking community

This article presents normative data for the Rorschach Comprehensive System (CS) on 100 adult nonpatients from the Belgian French-speaking community. We compare our Belgian sample to a French one (Sultan et al., 2004), data of Exner's (Exner & Erdberg, 2005) and a Californian sample (Shaffer, Erdberg, & Haroian, 1999). Each sample's specific characteristics are explored, as well as findings provided by sample-specific comparisons. Exner's data, ultimate normative reference for the CS, differ significantly from the three other samples for many variables. Cultural factors, examiner's level of experience, as well as participants' selection and recruitment, presumably flow into calculated differences between the four samples. Our findings indicate the necessity for constituting normative data for different communities, as well as the indispensability of examiners' familiarity with the CS, in order to provide reliable clinical information.     

Does solution of mental arithmetic problems such as 2 + 6 and 3 x 8 rely on the process of "Memory updating"?

Two experiments are reported that used the selective interference paradigm to study whether, besides response selection, the process of memory updating is involved in simple mental arithmetic. Participants were asked to solve simple sums (e.g., 2 + 6, Experiment 1) or simple products (e.g., 3 X 8, Experiment 2) in a single-task control condition and in three dual-task conditions with a selective interference task, simple reactions, choice reactions, or delayed choice reactions. The role of memory updating was estimated on the basis of the difference in impairment due to the choice reaction time and the delayed choice reaction time task, whereas the difference in impairment between the simple reaction time and the choice reaction time task indicates the role of response selection. While replicating previous results concerning response selection (Deschuyteneer & Vandierendonck, 2005, in press), the study showed that memory updating is strongly involved in solving simple mental arithmetic sums and products.     

Learning about non-predators and safe places: the forgotten elements of risk assessment

A fundamental prerequisite for prey to avoid being captured is the ability to distinguish dangerous stimuli such as predators and risky habitats from non-dangerous stimuli such as non-predators and safe locations. Most research to date has focused on mechanisms allowing prey to learn to recognize risky stimuli. The paradox of learned predator recognition is that its remarkable efficiency leaves room for potentially costly mistakes if prey inadvertently learn to recognize non-predatory species as dangerous. Here, we pre-exposed embryonic woodfrogs, Rana sylvatica, to the odour of a tiger salamander, Ambystoma tigrinum, without risk reinforcement, and later try to teach the tadpoles to recognize the salamander, a red-bellied newt Cynops pyrrhogaster—a closely related amphibian, or a goldfish, Carassius auratus, as a predator. Tadpoles were then tested for their responses to salamander, newt or fish odour. Pre-exposure to salamander did not affect the ability of tadpoles to learn to recognize goldfish as a predator. However, the embryonic pre-exposure to salamanders inhibited the subsequent learning of salamanders as a potential predator, through a mechanism known as latent inhibition. The embryonic pre-exposure also prevented the learned recognition of novel newts, indicating complete generalization of non-predator recognition. This pattern does not match that of generalization of predator recognition, whereby species learning to recognize a novel predator do respond, but not as strongly, to novel species closely related to the known predator. The current paper discusses the costs of making recognition mistakes within the context of generalization of predators and dangerous habitats versus generalization of non-predators and safe habitats and highlights the asymmetry in which amphibians incorporate information related to safe versus risky cues in their decision-making. Mechanisms such as latent inhibition allow a variety of prey species to collect information about non-threatening stimuli, as early as during their embryonic development, and to use this information later in life to infer the danger level associated with the stimuli.     

Creative potential: assessment issues and the EPoC Battery / Potencial creativo: temas de evaluación y batería EPoC

Abstract

Creative potential can be conceptualized as an ability to produce original ideas that have value in their context. This ability can be measured in three different ways, namely by examining (a) accomplishments or (b) ingredients (abilities and traits) underlying creativity or (c) through contextualized tasks that simulate real-world creative work. The Evaluation of Creative Potential (EPoC) Battery offers a contextualized measure of divergent-exploratory and convergent-integrative thinking processes applied in several content domains (visual art, verbal-literary, social, scientific, maths, music and body movement). The domain specificity of creative ability is represented by a profile of scores. Creative giftedness can be detected using this type of battery. The assessment of creative potential provides an opportunity for identification, orientation, individualized educational programmes and analyses of the effects of creativity training programmes.