Examining the Relative Contribution of Memory Updating, Attention Focus Switching, and Sustained Attention to Children's Verbal Working Memory Span

Whereas considerable developmental memory research has examined the contributions of short-term memory, processing efficiency, retention duration, and scope of attention to complex memory span, little is known about the influence of controlled attention. The present study investigated the relative influence of three understudied attention mechanisms on the verbal working memory span of school-age children: memory updating; attention focus switching; and sustained attention. Results of general linear modeling revealed that, after controlling for age, only updating accuracy emerged as a significant predictor of verbal working memory span. Memory updating speed (that subsumed attention focus switching speed) also contributed but was mediated by age. The results extend the developmental memory literature by implicating the mechanism of memory updating and developmental improvement in speed of attention focus switching and updating as critical contributors to children's verbal working memory. Theoretically, the results provide substantively new information about the role of domain-general executive attention in children's verbal working memory

A Systematic Review of the Effects of LENA-based Feedback on Parent-Child Language Interactions in Families with Young Children

Enhancing parent language interactions with children beginning in infancy is important because it results in better language abilities, social skills, and academic outcomes in children. A number of researchers have suggested that parent language interactions with children could be enhanced by giving parents feedback about their language interactions using the Language Environment Analysis (LENA) system. The LENA system records communication exchanges between a child and the adult caregiver and provides an automated analysis of adult word count, child vocalization count, and conversational turn count. We did a systematic review of the studies that investigated the use of LENA-based feedback to enhance parent language interactions with children. Although most previous studies have concluded that LENA-based feedback improves parental language interactions with children, methodological factors and confounding of treatment components in almost all of these studies make it impossible to know whether quantitative feedback from interactions recorded by the LENA system enhances parent language interactions with children. The designs and results of previous studies are discussed to suggest how future research can better address this important issue

Auditory processing in children: Role of working memory and lexical ability in auditory closure.

We examined the relationship between cognitive-linguistic mechanisms and auditory closure ability in children. Sixty-seven school-age children recognized isolated words and keywords in sentences that were interrupted at a rate of 2.5 Hz and 5 Hz. In essence, children were given only 50% of speech information and asked to repeat the complete word or sentence. Children's working memory capacity (WMC), attention, lexical knowledge, and retrieval from long-term memory (LTM) abilities were also measured to model their role in auditory closure ability. Overall, recognition of monosyllabic words and lexically easy multisyllabic words was significantly better at 2.5 Hz interruption rate than 5 Hz. Recognition of lexically hard multisyllabic words and keywords in sentences was better at 5 Hz relative to 2.5 Hz. Based on the best fit generalized "logistic" linear mixed effects models, there was a significant interaction between WMC and lexical difficulty of words. WMC was positively related only to recognition of lexically easy words. Lexical knowledge was found to be crucial for recognition of words and sentences, regardless of interruption rate. In addition, LTM retrieval ability was significantly associated with sentence recognition. These results suggest that lexical knowledge and the ability to retrieve information from LTM is crucial for children's speech recognition in adverse listening situations. Study findings make a compelling case for the assessment and intervention of lexical knowledge and retrieval abilities in children with listening difficulties

Examining the Relative Contribution of Memory Updating, Attention Focus Switching, and Sustained Attention to Children’s Verbal Working Memory Span

Whereas considerable developmental memory research has examined the contributions of short-term memory, processing efficiency, retention duration, and scope of attention to complex memory span, little is known about the influence of controlled attention. The present study investigated the relative influence of three understudied attention mechanisms on the verbal working memory span of school-age children: memory updating; attention focus switching; and sustained attention. Results of general linear modeling revealed that, after controlling for age, only updating accuracy emerged as a significant predictor of verbal working memory span. Memory updating speed (that subsumed attention focus switching speed) also contributed but was mediated by age. The results extend the developmental memory literature by implicating the mechanism of memory updating and developmental improvement in speed of attention focus switching and updating as critical contributors to children’s verbal working memory. Theoretically, the results provide substantively new information about the role of domain-general executive attention in children’s verbal working memory