Replies to comments by R. J. Griffore and D. A. Newman et al. on the author's original article on test validity and cultural bias in racial-group assessment. Helms notes that, given that within-group variance exceeds between-groups variance, racial groups are probably simulating a psychological construct that is more strongly related to…

In this paper we describe a taxonomy of task demands which distinguishes between Task Complexity, Task Condition and Task Difficulty. We then describe three theoretical claims and predictions of the Cognition Hypothesis (Robinson 2001, 2003b, 2005a) concerning the effects of task complexity on: (a) language production; (b) interaction and uptake…

In analytic moral philosophy it is standard to use unrealistic puzzles to set up moral dilemmas of a sort that I will call Lockean Puzzles. This paper will try to pinpoint just what is and what is not problematic about their use as a teaching tool or component part of philosophical arguments. I will try to flesh out the claim that what may be lost…

Psychologists are applying growth mixture models at an increasing rate. This article argues that most of these applications are unlikely to reproduce the underlying taxonic structure of the population. At a more fundamental level, in many cases there is probably no taxonic structure to be found. Latent growth classes then categorically approximate…

Evidence suggests that a moderate amount of variance in patient outcomes is attributable to therapist differences. However, explained variance estimates vary widely, perhaps because some therapists achieve greater success with certain kinds of patients. This study assessed the amount of variance in across-session change in symptom intensity scores…

This research explores the impact of students' ability to adjust to school environment at a residential accelerated upper-level high school for math and science. Students in their junior and senior years were given the DISC (Dominance, Influence, Steadiness, Conscientiousness) behavioral instrument and tracked over a two year period. The DISC has…

An era of high stakes accountability has expanded the necessity for school districts to secure principals with leadership behaviors that encourage successful academic performance. School leaders are sought to deliver practices that guide and empower entire school communities through unprecedented times of educational change. Research studies…

One major challenge in using group projects to assess student learning is accounting for the differences of contribution among group members so that the mark assigned to each individual actually reflects their performance. This research addresses the validity of grading group projects by evaluating different methods that derive individualized…

This study examined the independence and interplay between cognitive risk factors (poor executive function/emotion understanding) and maternal risk factors (low education/high depression) for preschool problem behaviors, indexed by multi-measure, multi-informant (mother/teacher/ researcher) ratings. A socio-economically diverse sample of 235…

Teacher knowledge and instructional expertise have been found in correlational and pre- and post-test studies to be related to student reading achievement. This article summarizes data presented in this special issue and additional research to address four questions: (a) What do expert reading teachers know? (b) Why do teachers need to acquire…

The influence of students' learning styles has been increasingly recognized as an integral component of effective higher education; therefore, application of learning styles to academic advising is equally relevant. As academic advisors address student learning styles in the hope of promoting greater student success, the contribution of advisors'…

Cultural sensitivity is recommended in education, but to our knowledge it has not been defined operationally. We found no research suggesting that behavioral interventions work differently with students differing in ethnicity, gender, or religion, although socialization may play a role in shaping behavior, selecting or responding to particular…

Drawing on transactional theories of child development, we assessed bidirectional links between trajectories of adolescent substance use and parenting processes from early through mid adolescence. Hierarchical generalized models estimated trajectories for 3,317 adolescents from the National Longitudinal Survey of Youth 1997, exploring both…

We investigated for the first time the genetic and environmental aetiology behind scientific achievement in primary school children, with a special focus on possible aetiological differences for boys and girls. For a representative community sample of 2,602 twin pairs assessed at age nine years, scientific achievement in school was rated by…

Developmental dyslexia was investigated within a well-understood and fully specified computational model of reading aloud: the dual route cascaded model (DRC [Coltheart, M., Rastle, K., Perry, C., Langdon, R., & Ziegler, J.C. (2001). DRC: A dual route cascaded model of visual word recognition and reading aloud. Psychological Review, 108,…