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Publication
ID31352223Published Date2019-11-01JournalCognition, 2019-11-01, Volume 192
Infants appear to progress from universal to language-specific event perception. In Japanese, two different verbs describe a person crossing a bounded ground (e.g., street) versus an unbounded ground (e.g., field) while in English, the same verb - crossing - describes both events. Interestingly, Japanese and English 14-month-old infants form categories of Japanese ground distinctions in nonlinguistic events while by 20 months, only Japanese-reared infants retain this ability. Five experiments…
Publication
ID30888226Published Date2019-11-01JournalCrisis, 2019-11-01, Volume 40
Suicide is a major global issue; US college students may be at greater risk and faculty may play a crucial role in prevention. The primary purpose of the present study was to examine: the level of confidence of college/university faculty in identifying at-risk students, to what extent they believed that their actions might reduce suicide, and their knowledge and experiences of their school's policies regarding intervention with at-risk students. Data from 507 higher education faculty across t…
Publication
ID31596178Published Date2019-10-09JournalDeath studies, 2019-10-09
To further inclusion of interpersonal hopelessness within the interpersonal theory of suicide, we evaluated the Interpersonal Hopelessness Scale's (IHS) factor structure, and compared its relation to suicide ideation to that of the Interpersonal Needs Questionnaire's. Participants were 591 attentive US adults who completed surveys online. Exploratory factor analyses supported a single IHS factor, which accounted for about 70% of the total variance. Both measures statistically predicted suicid…
Publication
ID31376630Published Date2019-10-01JournalBrain and language, 2019-10-01, Volume 197
Few studies have examined the time course of second language (L2) induced neuroplasticity or how individual differences may be associated with brain changes. The current longitudinal structural magnetic resonance imaging study examined changes in cortical thickness (CT) and gray matter volume (GMV) across two semesters of L2 Spanish classroom learning. Learners' lexical processing was assessed via a language decision task containing English and Spanish words. Our findings indicated that (1) C…
Publication
IDDOI:10.1177/2515245919869583Published Date2019-09-17JournalAdvances in Methods and Practices in Psychological Science, 2019-09-17
Scientific advances across a range of disciplines hinge on the ability to make inferences about unobservable theoretical entities on the basis of empirical data patterns. Accurate inferences rely on both discovering valid, replicable data patterns and accurately interpreting those patterns in terms of their implications for theoretical constructs. The replication crisis in science has led to widespread efforts to improve the reliability of research findings, but comparatively little attention…
Publication
ID29450793Published Date2019-08-01JournalPsychonomic bulletin & review, 2019-08-01, Volume 26
Most data analyses rely on models. To complement statistical models, psychologists have developed cognitive models, which translate observed variables into psychologically interesting constructs. Response time models, in particular, assume that response time and accuracy are the observed expression of latent variables including 1) ease of processing, 2) response caution, 3) response bias, and 4) non-decision time. Inferences about these psychological factors, hinge upon the validity of the mo…
Publication
ID30803465Published Date2019-07-01JournalJournal of child language, 2019-07-01, Volume 46
Several aspects of early language skills, including parent-report measures of vocabulary, phoneme discrimination, speech segmentation, and speed of lexical access predict later childhood language outcomes. To date, no studies have examined the long-term predictive validity of novel word learning. We examined whether individual differences in novel word learning at 21 months predict later childhood receptive vocabulary outcomes rather than generalized cognitive abilities. Twenty-eight 21-month…
Publication
ID30931971Published Date2019-04-01JournalScientific reports, 2019-04-01, Volume 9
Drugs of abuse, such as opiates, have been widely associated with enhancing HIV replication, accelerating disease progression and diminishing host-immune responses, thereby making it harder to effectively manage HIV infection. It is thus important to study the effects of drugs of abuse on HIV-infection and immune responses. Here, we develop mathematical models that incorporate the effects of morphine-altered antibody responses on HIV/SIV dynamics. Based on fitting the model to experimental da…
Publication
ID30611763Published Date2019-03-15JournalPhysiology & behavior, 2019-03-15, Volume 201
High altitude sojourn is broadly associated with impaired cognitive function, although there are inconsistencies within the literature. Incorporation of mathematical modeling to gain insight into latent aspects of decision-making may strengthen the ability to characterize changes in cognitive function during high altitude sojourn. This study sought to examine the effects of high altitude on cognitive function and underlying constructs of decision-making during an 11-d incremental ascent to 51…
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