Background: Understanding the different factors that determine vocabulary development in young children is essential for the diagnosis and rehabilitation of language disorders in children. Language development is closely related to other cognitive processes such as auditory verbal learning and memory. This research focuses on the development of a…

Intraindividual variability (IIV) in cognitive speed, or moment-to-moment changes in ability, is a developmental phenomenon indicative of neurological integrity that increases gradually across adulthood. Past research has shown that IIV negatively covaries with cognitive performance, in which higher IIV at one occasion is associated with poorer…

Purpose: The aim of this study was to determine whether the word-learning challenges associated with developmental language disorder (DLD) result from encoding or retention deficits. Method In Study 1, 59 postsecondary students with DLD and 60 with normal development (ND) took the California Verbal Learning Test-Second Edition, Adult Version…

Purpose: Of the three currently recognized variants of primary progressive aphasia, behavioral differentiation between the nonfluent/agrammatic (nfvPPA) and logopenic (lvPPA) variants is particularly difficult. The challenge includes uncertainty regarding diagnosis of apraxia of speech, which is subsumed within criteria for variant classification.…

Childhood socioeconomic status (SES), as measured by parental education and family income, is highly predictive of academic achievement, but little is known about how specific cognitive systems shape SES disparities in achievement outcomes. This study investigated the extent to which executive function (EF) mediated associations between parental…

Clinical reasoning requires thoughtful consideration of a variety of factors that contribute to the conceptualization of a case such as the reason for referral, school information, home environment, assessment outcomes, and behavioural observations made during assessments. The purpose of this article is to provide the reader with insight into the…

The latent structure of the California Verbal Learning Test-Second Edition (CVLT-II) was examined in a clinical sample of 223 persons with traumatic brain injury that had been screened to remove individuals with complicating premorbid (e.g., psychiatric) or comorbid (e.g., financial compensation seeking) histories. Analyses incorporated the…

The effects of delaying an immediate test, a rehearsal opportunity, or a second presentation on long-term free recall were investigated in an experiment combining features of the Brown-Peterson and free-recall paradigms. A proposed model assumes that both repetitions and tests promote learning. (CHK)

The present study used well-defined traumatic brain injury (TBI) and mixed neurological (other than TBI) and psychiatric samples to examine the specificity and sensitivity to Malingered Neurocognitive Dysfunction (MND) of four individual California Verbal Learning Test (CVLT) variables and eight composite CVLT malingering indicators. Participants…

When subjects are tested on ordered information, performance is better on inferences than on information actually presented during training. Humphreys suggested that superiority on inferences derives from differential frequency. This experiment refutes that position, demonstrating that superiority on inferences is observed even when frequency is…

Subjects were asked to encode and recall lists of words under the influences of marijuana and a marijuana placebo. Free recall was more complete when both encoding and recall were after marijuana use than in the encode-marijuana, recall-placebo state. Recall must depend on restoration of dissociated encoding state. (CHK)

This verbal memory study considers only simple sentences and examines learner performance under the two conditions of audio presentation and printed presentation. Learner performance is compared when required either to recognize sentences identical to those in the original list or, alternatively, to recognize non-identical sentences incorporating…

THREE GROUPS OF FIRST- AND SECOND-GRADE CHILDREN, TWO LOWER-CLASS AND ONE MIDDLE-CLASS, WERE ASKED TO LEARN AND RECALL SEQUENCES OF WORDS AT FOUR LEVELS OF CONCEPTUAL DIFFICULTY--NONSENSE SYLLABLES, HIGH FREQUENCY NOUNS, ANOMALOUS SENTENCES, AND MEANINGFUL SENTENCES. IT WAS HYPOTHESIZED THAT THE STUDENTS' VERBAL MEMORY WOULD INCREASE WITH…