Children struggle beyond preschool-age in a continuous version of the ambiguous figures task

Children until the age of five are only able to reverse an ambiguous figure when they are informed about the second interpretation. In two experiments, we examined whether children’s difficulties would extend to a continuous version of the ambiguous figures task. Children (Experiment 1: 66 3- to 5-year olds; Experiment 2: 54 4- to 9-year olds) and adult controls saw line drawings of animals gradually morph—through well-known ambiguous figures—into other animals. Results show a relatively late developing ability to recognize the target animal, with difficulties extending beyond preschool-age. This delay can neither be explained with improvements in theory of mind, inhibitory control, nor individual differences in eye movements. Even the best achieving children only started to approach adult level performance at the age of 9, suggesting a fundamentally different processing style in children and adults

Verifying Post-Quantum Signatures in 8 kB of RAM

Contains fulltext : 236620.pdf (Author’s version preprint ) (Closed access)PQCrypto 202

Ebbinghaus figures that deceive the eye do not necessarily deceive the hand

International audienceIn support of the visual stream dissociation hypothesis, which states that distinct visual streams serve vision-for-perception and vision-for-action, visual size illusions were reported over 20 years ago to `deceive the eye but not the hand'. Ever since, inconclusive results and contradictory interpretations have accumulated. Therefore, we investigated the effects of the Ebbinghaus figure on repetitive aiming movements with distinct dynamics. Participants performed a Fitts' task in which Ebbinghaus figures served as targets. We systematically varied the three parameters which have been shown to influence the perceived size of the Ebbinghaus figure's target circle, namely the size of the target, its distance to the context circles and the size of the context circles. This paper shows that movement is significantly affected by the context size, but, in contrast to perception, not by the other two parameters. This is especially prominent in the approach phase of the movement towards the target, regardless of the dynamics. To reconcile the findings, we argue that different informational variables are used for size perception and the visual control of movements irrespective of whether certain variables induce (perceptual) illusions

Psychic Distance, its Impact and Coping Modes

This paper adopts an interpretative focus in addressing SME decision makers' perceptions of psychic distance. It draws on empirical evidence from British SMEs exporting to Brazil. The study also addresses the hitherto neglected question of how SMEs cope with the difficulties of engaging in international business with psychically distant counties. It discusses the implications of its cognitive approach and findings for further research and conceptual development. Results indicate the relevance of a broad-based multi-dimensional interpretation of psychic distance. Distance dimensions also have a differential impact on doing business with Brazil, although a strong socio-institutional cluster appears. Further exploration of the understandings that SME decision-makers have of psychic distance-related impacts and the possibilities of coping with these, illustrate how they attempt to bridge psychic distance features or adopt avoidance measures. [ABSTRACT FROM AUTHOR