Adult developmental trajectories of pseudoneglect in the tactile, visual and auditory modalities and the influence of starting position and stimulus length.

Pseudoneglect is a tendency to pay more attention to the left side of space, typically demonstrated on tasks like visuo-spatial line bisection, tactile rod bisection and the mental representation of numbers. The developmental trajectory of this bias on these three tasks is not fully understood. In the current study younger participants aged between 18 and 40 years of age and older participants aged between 55 and 90 years conducted three spatial tasks: (1) visuospatial line bisection - participants were asked to bisect visually presented lines of different lengths at the perceived midpoint; (2) touch-driven tactile rod bisection in the absence of vision - participants were asked to feel the length of a wooden rod with their index finger and bisect the rod at the perceived centre; and (3) mental number line bisection in the absence of vision - participants were asked to listen to a pair of numbers and respond with the numerical midpoint between the pair.

Representational pseudoneglect: a review.

Pseudoneglect, the tendency to be biased towards the left-hand side of space, is a robust and consistent behavioural observation best demonstrated on the task of visuospatial line bisection, where participants are asked to centrally bisect visually presented horizontal lines at the perceived centre. A number of studies have revealed that a representational form of pseudoneglect exists, occurring when participants are asked to either mentally represent a stimulus or explore a stimulus using touch in the complete absence of direct visuospatial processing. Despite the growing number of studies that have demonstrated representational pseudoneglect there exists no current and comprehensive review of these findings and no discussion of a theoretical framework into which these findings may fall.

Left-ear-driven representational pseudoneglect for mentally represented real-word scenes created from aural-verbal description.

The current research explored pseudoneglect for the mental representation of real-world scenes generated from aural-verbal description in the complete absence of direct visual processing. Healthy participants listened binaurally or monaurally to aural-verbal descriptions of novel real-world scenes with familiar landmarks (e.g.

Current tests and trends in single-case neuropsychology.

In this issue of Cortex, Crawford, Garthwaite and Ryan publish bayesian statistical tests that will enable researchers to take account of covariates when comparing single patients to control samples. In this article, we provide some context for this development, from an audit of the Cortex archives. We suggest that single-case research is alive and well, and more rigorous than ever, and that current practice has been shaped considerably by Crawford and colleagues' statistical refinements over the past 12 years.

Representational pseudoneglect in an auditory-driven spatial working memory task.

Two experiments explored lateralized biases in mental representations of matrix patterns formed from aural verbal descriptions. Healthy participants listened, either monaurally or binaurally, to verbal descriptions of 6 by 3 matrix patterns and were asked to form a mental representation of each pattern. In Experiment 1, participants were asked to judge which half of the matrix, left or right, contained more filled cells and to rate the certainty of their judgement.

Tactile rod bisection in the absence of visuo-spatial processing in children, mid-age and older adults.

The effect of age on tactile rod bisection is explored in an attempt to fully understand lateralized biases that are not driven by prior experience or visual processing. In Experiment 1, a total of 549 healthy participants aged between 3 and 84 years of age, divided into eight age groups, used touch alone without vision to bisect one wooden rod. Participants across all age groups, except those approaching or in adolescence, showed pseudoneglect on tactile rod bisection.