To investigate the longitudinal course of cognitive functions in boys with persistent and remittent ADHD from childhood into young adult years. Males (n=217) 15-31 years with and without ADHD were assessed at 3 time points over 10 years into young adulthood. Subjects were stratified into Remittent ADHD, and Persistent ADHD based on the course of ADHD. Cognitive domains included: 1) overall IQ (overall IQ, block design IQ, vocabulary IQ, 2) achievement scores in reading and math and measures of executive function (Wechsler arithmetic, digit span, digit symbol, Rey-Osterrieth, Wisconsin Card Sorting Test, and the Stroop Test). Cognitive outcomes were modeled as a function of group (Controls, Remittent ADHD, and Persistent ADHD), age, group by age interaction, and any demographic confounders using linear growth-curve models. There were no significant interaction effects of group by time. Main group effects indicated that persistent and remittent ADHD groups both had significantly lower scores on all cognitve outcomes compared to Controls and these did not differ between them. Psychometrically-defined cognitive deficits are relatively stable into young adult years and appear to be independent of the course of ADHD. More work is needed to help define the implications of these deficits in individuals with a remitting course of ADHD.

Neuropsychological deficits in the executive system are major sources of morbidity in individuals with attention-deficit/hyperactivity disorder (ADHD). We conducted a 5-year longitudinal study of girls with (N = 140) and without (N = 122) ADHD, aged 6-18 years at baseline. Neuropsychological functioning was assessed using standard neuropsychological testing assessing executive functions (EFs). Girls with ADHD were significantly more impaired than controls in all neuropsychological domains except set shifting. Despite variability in the stability of individual domains of EFs, the majority (79%) of girls with ADHD that met the categorical definition of executive function deficits (EFDs, defined as two or more EF tasks impaired) at baseline continued to have EFDs at the five-year followup. These findings document the stability of EFDs in girls with ADHD from childhood into adolescence.

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While an elicited imitation test (EIT) has been widely used as a measure of oral proficiency in second language acquisition (SLA) research, it is still unclear the extent to which memory capacity impacts EIT performance. In light of this gap, the present study sought to clarify the nature of elicited imitation by examining the relative contributions of language ability and phonological short‐term memory (PSTM) to EIT performance. Seventy‐eight second language (L2) learners of Spanish, who were grouped into 3 Spanish experience levels, took a Spanish EIT, an L2 oral narrative task, and a nonword repetition (NWR) task in their first language. Results demonstrated that learners’ EIT performance was primarily predicted by complexity, accuracy, and fluency (CAF) measures extracted from the oral narrative task rather than NWR scores, which served as an index for PSTM capacity. Furthermore, the present study provided suggestive evidence that PSTM capacity may differentially mediate EIT performance depending on the extent of learners’ proficiency in and experience with Spanish. While facilitative effects for PSTM capacity were observed for less experienced learners, no effects were found for more experienced learners.

The benefits of corrective feedback (CF) for second language (L2) learning are empirically attested, and multiple factors mediating CF effectiveness have been investigated. However, the timing of oral CF has received less attention given most research examines corrections provided immediately after an error. Delayed CF also warrants investigation; it occurs naturally in L2 classrooms and may be an appealing alternative in online learning contexts. Existing CF timing research shows either no significant differences between immediate and delayed CF, or advantages for immediate CF. To elucidate mixed findings, more CF timing studies are needed, especially those considering the effects of factors such as CF type, linguistic target and communication mode. Regarding communication mode, the effect of CF timing on errors made during text-based synchronous computer-mediated communication (SCMC), for instance, has received less attention. Examining text-based SCMC is important given its empirically attested benefits for L2 learning, and in some cases its advantage over face-to-face interaction for fostering CF effectiveness. Investigating the role of CF timing on errors made in text-based SCMC will contribute to efforts to maximize CF effectiveness in online learning environments, which are becoming increasingly common. In this study, 30 third-year learners of Spanish as a foreign language completed a one-way information-gap task with an interlocutor using Skype text-chat. On vocabulary errors, learners received either immediate or delayed error repetition plus recast, or no CF. Results revealed both CF groups significantly outperformed the comparison group on an oral picture description task, with no significant differences between immediate and delayed CF. Results may be due to the salience of the CF modality, type, and target.