Making new breakthroughs in understanding the processes underlying human cognition may depend on the availability of very large datasets that have not historically existed in psychology and neuroscience. Lumosity is a web-based cognitive training platform that has grown to include over 600 million cognitive training task results from over 35 million… (More)
The NeuroCognitive Performance Test (NCPT) is a brief, repeatable, web-based cognitive assessment platform that measures performance across several cognitive domains. The NCPT platform is modular and includes 18 subtests that can be arranged into customized batteries. Here we present normative data from a sample of 130,140 healthy volunteers for an NCPT… (More)
BACKGROUND A variety of studies have demonstrated gains in cognitive ability following cognitive training interventions. However, other studies have not shown such gains, and questions remain regarding the efficacy of specific cognitive training interventions. Cognitive training research often involves programs made up of just one or a few exercises,… (More)
INTRODUCTION Lumosity's Memory Match (LMM) is an online game requiring visual working memory. Change in LMM scores may be associated with individual differences in age-related changes in working memory. METHODS Effects of age and time on LMM learning and forgetting rates were estimated using data from 1890 game sessions for users aged 40 to 79 years. … (More)
The notion that human learning follows a smooth power law (PL) of diminishing gains is well-established in psychology. This characteristic is observed when multiple curves are averaged, potentially masking more complex dynamics underpinning the curves of individual learners. Here, we analyzed 25,280 individual learning curves, each comprising 500… (More)
This paper attempts to delineate subgroups from the heterogeneous group labeled "Atypical Depression," in order to interpret various clinical studies which used varied diagnostic criteria. From the resultant working definition some treatment guidelines are suggested.
A case history of abdominal swelling of psychological origin is described. The clinical presentation and psychogenic pathogenesis of the disorder provide a differentiation from pseudocyesis. The psychodynamics of this case are discussed emphasizing the conflict involving strong elements of pre-oedipal aggressivity towards the father image.