The explanation of social inequalities in education is still a debated issue in economics. Recent empirical studies tend to downplay the potential role of credit constraint. This article tests a different potential explanation of social inequalities in education, specifically that social differences in aspiration level result in different…

This experimental study investigates the acquisition of Italian accusative and dative clitics by English adult speakers. These pronouns are non-existent in English. Results from a grammaticality judgement task show that Italian accusative and dative clitics develop slowly but gradually in Italian second language (L2) grammars. Interestingly, the…

We evaluated a video-based error correction procedure for teaching four adults with developmental disabilities to set a table. Video clips were initially used as an antecedent prompt. However, only one of the adults learned to set the table with this procedure. Consequently, the remaining three adults received intervention in which the video clips…

An intervention consisting of task clarification, visual prompts, and graphic feedback was evaluated to increase customer greeting and up-selling in a restaurant. A combination multiple baseline and reversal design was used to evaluate intervention effects. Although all interventions improved performance over baseline, the delivery of graphic…

Twenty-four younger (18-35 years) and 24 older adult participants (65 or older) were exposed to three experimental conditions involving the memorization words and their associated contextual features, with contextual feature complexity increasing from Conditions 1 to 3. In Condition 1, words presented varied only on one binary feature (color,…

Background: Previous research has reported a link between imaginary companions (ICs) in middle childhood and the perception of verbal material in ambiguous auditory stimuli. These findings have been interpreted in terms of commonalities in the cognitive processes underlying children's engagement with ICs and adults' reporting of imaginary verbal…

The purpose of this study was to train teachers to follow a task analysis to teach a story-based literacy lesson using adapted, grade-appropriate middle school literature to students with moderate and severe developmental disabilities. A multiple-probe-across-participants design was used to examine the effects of training teachers to follow a…

Matrix metalloproteinases (MMPs) are a family of extracellularly acting proteolytic enzymes with well-recognized roles in plasticity and remodeling of synaptic circuits during brain development and following brain injury. However, it is now becoming increasingly apparent that MMPs also function in normal, nonpathological synaptic plasticity of the…

The use and understanding of self-presentational display rules (SPDRs) was investigated in 21 children with high-functioning autism (FHA), 18 children with Asperger's disorder (AspD) and 20 typically developing (TD) children (all male, aged 4- to 11-years, matched on mental age). Their behaviour was coded during a deception scenario to assess use…

Several recent experiments indicate that, when learning words, children are not as sensitive to phonemic differences (e.g., /d/ vs. /t/) as they are in discrimination tasks [Pater, J., Stager, C. L., & Werker, J. F. (2004). "The perceptual acquisition of phonological contrasts." "Language," 80, 384-402; Stager, C. L., & Werker, J. F. (1997).…

The relation between general intelligence (psychometric "g") and temporal resolution capacity of the central nervous system was examined by assessing performance on eight different temporal tasks in a sample of 100 participants. Correlational and principal component analyses suggested a unitary timing mechanism, referred to as temporal "g".…

Rapid processing deficits have been the subject of much debate in the literature on specific language impairment (SLI). Hari and Renvall (2001) [Hari, R. & Renvall, H. (2001). Impaired processing of rapid stimulus sequences in dyslexia. "Trends in cognitive sciences", 5, 525-532.] proposed that the source of this deficit can be attributed to…

Purpose: To examine perceptual deficits as a potential underlying cause of specific language impairments (SLI). Method: Twenty-one children with SLI (8;7-11;11 [years;months]) and 21 age-matched controls participated in categorical perception tasks using four series of syllables for which perceived syllable-initial voicing varied. Series were…

One phenomenon of language development is a dramatic increase in vocabulary size, driven by rapid word learning. For individuals with intellectual disabilities, the size of the lexicon often lags behind what would be expected both for CA and MA. I examined how well individuals with severely limited receptive vocabulary associated with intellectual…

This study highlights the computer-mediated discursive activity of two dyads of first year educational sciences students, each collaboratively exploring several options for increasing the equilibrium size of a fish population in a lake. Our focus is on peers' attempts to come up with justified predictions about the adequacy of several options for…