Masking by object substitution: dissociation of masking and cuing effects

In a newly discovered form of visual masking, a target stimulus is masked by 4 flanking dots if their offset is delayed relative to the target (V. Di Lollo, J. T. Enns, & R. A. Rensink, 2000). In Di Lollo et al. (2000), the dot pattern also cued the relevant target and therefore required deliberate attention. In the present Experiments 2-6, a central arrow cued 1 of 2 letters for an E/F discrimination, with dots flanking both letters. Masking was reduced compared with the mask-cue procedure but was still robust. Delayed-offset dots flanking the nontarget also impaired performance, indicating competition for attention. Masking was unaffected by brightness of the dots relative to the target. Masking was attenuated not only by precuing attention to the target location but also by preview of an uninformative dot mask. Theories of masking by object substitution must therefore accommodate the prior context into which the target stimulus is introduced.     

Are creativity and schizotypy products of a right hemisphere bias?

Prior research has shown associations between higher creativity (e.g., semantic association, verbal fluency), higher schizotypy (e.g., magical ideation), and relatively stronger right hemisphere laterality measures--when each of the three pairings has been studied individually. Our prior study related creativity and schizotypy to signal detection theory response criterion aspects of laterality. The present study attempted to integrate findings regarding these three constructs and to replicate the signal detection theory laterality results by providing measures of all three constructs in a within subjects design. Participants were 60 undergraduates who completed a test battery including two measures of creativity, three measures of schizotypy, a lateralized lexical decision task, and a dichotic listening task. Results are consistent with individual differences in creativity and schizotypy being partly related to a response criterion favoring right hemisphere, possibly nonconscious, processing. Dichotic listening results revealed a strong association of better right hemisphere (left ear) localization ability and creativity.     

Effects of Teaching Upper Elementary Grade Students to Use Word Learning Strategies

This study examined the effects of three trials of a one-semester program designed to teach word learning strategies. Together, the three trials included 320 fourth- and fifth-grade students from diverse backgrounds. Trial 1 showed that the program significantly increased students? scores on an experimenter-designed test. Trial 2 again showed that the program significantly increased students' scores on the experimenter-designed test and that English learners made larger gains than non-English learners. Trial 3 showed that students made statistically significant gains on the experimenter-designed test and on two transfer tests that were not designed by the experimenters.     

Postreading Questioning and Middle School Students’ Understanding of Literature

Bibliopower can be used effectively to develop positive attitudes about reading and writing among reluctant readers and writers. The purpose of this study was to identify Newbery and Caldecott Medal books which possess bibliopower. Suggestions are made for the classroom use of these books to help students build lifetime commitments to reading and writing.     

The Greensboro Child Response Initiative: A Trauma-Informed,Mental Health–Law Enforcement Model for Children Exposed to Violence

This article evaluates a trauma-informed, mental health–law enforcement intervention model called the Greensboro Child Response Initiative (CRI). CRI is a community-coordinated response to mitigate the development of traumatic stress symptoms in children exposed to violence, with the goals of decreasing mental health symptoms and other negative outcomes. Results from a quasi-experimental study indicated that caregivers appreciate the quick follow-up and support by CRI advocates and police reported seeing CRI as a critical component of their responses to calls for service related to families and children. Police line-ups and training provided by CRI increased levels of empathy and awareness of child trauma. Monthly stakeholder meetings promoted an informed victim response and increased communication and networking opportunities among community providers and law enforcement. Results suggest that CRI is a promising community-based early intervention, and implications and suggestions are provided for replicability.     

Fatigue,emotional functioning,and executive dysfunction in pediatric multiple sclerosis

Objective: Fatigue, depression, anxiety, and executive dysfunction are associated with multiple sclerosis (MS) in adults. Existing research suggests similar problems in pediatric MS, but relationships between these variables have not been investigated. This study investigates the associations between executive functioning and fatigue, emotional functioning, age of onset, and disease duration in pediatric MS.

Methods: Twenty-six MS or Clinically Isolated Syndrome (CIS) patients, ages 7 to 18, were evaluated through a multidisciplinary demyelinating diseases clinic. Participants completed neuropsychological screening including Verbal Fluency, Digit Span, and Trail-Making Test. Parents completed rating forms of behavioral, emotional, and executive functioning. Patients and parents completed questionnaires related to the patient’s quality of life and fatigue. Pearson’s correlation coefficients were calculated to investigate relationships between fatigue, emotional functioning, and executive functioning, as well as to examine correlations between parent and child reports of fatigue.

Results: Rates of parent-reported anxiety, depression, fatigue, and executive dysfunction varied widely. Means were below average on the Trail-Making Test and average on Verbal Fluency and Digit Span, though scores varied widely. Various fatigue and emotional functioning indices—but not age of onset or disease duration—significantly correlated with various performance-based measures of executive functioning.

Conclusion: Results indicate pediatric MS is associated with some degree of fatigue, emotional difficulties, and executive dysfunction, the latter of which is associated with the two former. Notably, age of onset and disease duration did not significantly correlate with executive functioning. Results advance understanding of psychological and clinical variables related to neurocognitive outcomes in pediatric MS.     

Computation and application of generalized linear mixed model derivatives using lme4

Psychometrika - Maximum likelihood estimation of generalized linear mixed models (GLMMs) is difficult due to marginalization of the random effects. Derivative computations of a fitted GLMM’s...