In order to learn about memory development one must start from the beginning. An infant goes through remarkable changes during the first years of life; they begin to crawl, talk, and actively engage with the world around them. Much too often in the history of psychology, the abilities present during the first years of life have been neglected, overlooked, or not given much weight in theory buil...

In the Results section, there is an error in the fourth equation in the section titled " Propagule with two dispersal abilities " and in the eleventh equation in the section titled " Propagules with multiple dispersal abilities. " In both equations, γ 2 appears incorrectly outside the parentheses. Please view the complete, correct equations here: c

This study documents age trends, interrelations, and correlates of intellectual abilities in old and very old age (70-103 years) from the Berlin Aging Study (N = 516). Fourteen tests were used to assess 5 abilities: reasoning, memory, and perceptual speed from the mechanic (broad fluid) domain and knowledge and fluency from the pragmatic (broad crystallized) domain. Intellectual abilities had n...

This paper investigates whether education is used as a signaling device for worker productivity in developing countries. To do such we employ a simple test of employer learning on Ghana manufacturing data. We find no evidence of educational signaling for individuals who were hired through direct contacts in the firm, and thus for workers for which employers arguably have more information about ...

Theory, assessment, and instruction in the field of human abilities have tended to emphasize intelligence at the expense of wisdom and creativity. Were these three abilities indistinguishable, such an emphasis would be understandable and acceptable. But a review of the literature as well as data I have recently collected suggest that the three abilities are distinguishable, and that there are i...

BACKGROUND Our understanding of coevolution in a predator-prey system is based mostly on pair-wise interactions. METHODOLOGY AND PRINCIPAL FINDINGS Here I analyze a one-predator-two-prey system in which the predator's attack ability and the defense abilities of the prey all evolve. The coevolutionary consequences can differ dramatically depending on the initial trait value and the timing of t...

I locate the discontinuity between humans and other animals a bit differently than Henriques (this issue)-in metarepresentational abilities. However, I do think that the justification process might have played a critical role in the development of these metarepresentational abilities.

Oligopoly price discrimination in the retail market prevents a manufacturer from inducing optimal retail margins through any wholesale price. This motivates the manufacturer to impose resale price maintenance. In a model of third-degree price discrimination by rival retailers, a retail price ceiling (or floor) enables the manufacturer to restore the first best. Imposing a fixed retail price is ...

The aim of the study was to identify the motor structures that determine achievement of top results in karate. The study included a sample of 85 karateka aged 18-29 years, competing as senior category athletes of the Croatian Karate Society. Fourteen motor tests (9 basic motor tests and 5 specific motor tests) were used to assess technical efficiency; fighting efficiency was estimated on the ba...

INTRODUCTION The ability to mentally rotate an object in 3 dimensions has been shown with an individual's score on the Vandenberg and Kuse Mental Rotations Test. The was to determine whether this Mental Rotations Test could be used to predict performance complex surgical skill - the tying of a 1-handed surgical reef knot. In addition, we learning a spatially complex surgical skill could be achi...