The recent article by Nieuwoudt, Dickie, Coetsee, Engelbrecht and Terblanche (2019) entitled "Age- and education-related effects on cognitive functioning in Colored South African women" published in the journal Aging, Neuropsychology, and Cognition, attracted considerable negative attention, leading to its official withdrawal from…

This study investigated the effect of different implicit definitions of equality upon children's performance on conservation tasks. In the study, traditional versions of conservation tasks are compared to modified versions in which initial equality is established through verbal counting of discontinuous quantities and measuring of continuous…

Examined research into the memory deficit of retarded readers within a working memory framework. Results showed fairly consistent evidence that reading retardation can be associated with a deficit in long-term storage of phonological information, which may affect retarded readers' ability to utilize the articulatory loop. (JAC)

Spearman's "Law of Diminishing Returns" states that the g saturation of a test is greater for individuals with lower, rather than higher, test scores, and that it decreases with age. A common methodological problem in testing Spearman's "Law of Diminishing Returns" with respect to ability differentiation is how to create the…

In an Internet study unrelated to handedness, 134,317 female and 120,783 male participants answered a graded question as to which hand they preferred for writing. This allowed determination of hand preference patterns across 7 ethnic groups. Sex differences in left-handedness were found in 4 ethnic groups, favoring males, while no significant sex…