Human Development & Quantitative Methodology
Permanent URI for this communityhttp://hdl.handle.net/1903/2248
The departments within the College of Education were reorganized and renamed as of July 1, 2011. This department incorporates the former departments of Measurement, Statistics & Evaluation; Human Development; and the Institute for Child Study.
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Item The response-monitoring mechanism: Influence of feedback and temperament(2008-05-06) Martin McDermott, Jennifer; Fox, Nathan A; Human Development; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)The purpose of the current study was to examine behavioral and physiological processes underlying response-monitoring and to document the manner in which these processes are expressed during early childhood. As well, this study examined two factors important in understanding individual differences in monitoring: performance feedback and temperament. A total of seventy-four children (mean age 7.5 years) were tested using a modified flanker paradigm administered in both no-feedback and feedback conditions. Accuracy and reaction time measures of behavioral performance were assessed as well as event-related potentials linked to response execution and feedback presentation. Data were also examined in relation to the temperamental dimensions of shyness and inhibitory control. The results indicate a strong impact of trial-by-trial feedback on both behavioral and physiological measures. Overall, feedback served to increase children's task engagement as evidenced by fewer errors of omission and faster reaction times. Similarly, the physiological measures also varied as a function of feedback such that the error-related Positivity (Pe) and the feedback-related negativity (FRN) were more pronounced on incorrect as compared to correct trials in the feedback condition. Larger FRN responses were also associated with fewer errors of commission. These findings were further moderated by individual differences in temperament. Specifically, feedback was particularly influential in increasing task involvement for children low in inhibitory control and enhancing performance accuracy for children low in shyness Overall these results confirm a strong impact of feedback on task engagement as assessed by children's behavioral performance and physiological reactivity. Findings are presented in the framework of individual differences in cognitive control and variations in children's physiological measures of response-monitoring are discussed. Several avenues for future research are provided which emphasize the need for investigations of response-monitoring in young children and also highlight the importance of exploring the applicability of these assessments across various cognitive and social contexts.Item The bilingual acquisition of compound words and its relation to reading skills(2008-04-22) Cheng, Chenxi; Wang, Min; Human Development; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)This study investigated how Chinese-English bilingual children process compound words in their two languages and how that processing skill in one language affects reading skill in the other language. Experiments 1 and 2 investigated the bilingual acquisition of compound words, using a lexical-decision paradigm. Each compound was composed of two constituent morphemes in the target language. The combination of the translated equivalents of the constituents formed a new translated compound word (or nonword) in the nontarget language. In both Experiments 1 and 2, when the target language was English, the lexical status of translated compounds in the nontarget language was shown to affect the accuracy of lexical decisions in the target language. When the target language was Chinese, the effect of the lexical status in English was not significant in Experiment 1 and disappeared after the effect of familiarity was controlled in Experiment 2. The results of Experiment 2 further showed that the effect of the lexical status of translated compounds was independent of semantic transparency and language proficiency. Those results provided evidence of decomposition in both semantically transparent and semantically opaque compounds. The stronger effect from L1 to L2 than from L2 to L1 is consistent with the Revised Hierarchical Model (Kroll & Stewart, 1994). Experiment 3 investigated the awareness of compound words and reading skills and their relationship in a group of Grade 2 and Grade 3 Chinese-English bilingual children. Comparable tasks in Chinese and English were designed to test students' morphological awareness of compounds, phonological awareness, oral vocabulary, word reading, and reading comprehension. Results of structural equation modeling showed that, within each language, compound awareness was a significant predictor for both real-word naming and reading comprehension. Across languages, English compound awareness was a significant predictor for reading comprehension in Chinese. Those results suggest that compound awareness might play a critical role in the reading development of Chinese-English bilingual children.Item Learning with hypermedia: Examining cognitive, motivational, and contextual factors(2007-04-17) Moos, Daniel Charles; Azevedo, Roger; Human Development; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)Think-aloud, pretest, posttest, and self-efficacy data collected from 85 undergraduates were used to examine factors related to learning with hypermedia. Participants, randomly assigned to either the No Scaffolding (NS) condition or Conceptual Scaffolding (CS) condition, were given 30 minutes to learn about the circulatory system with hypermedia. Participants in the NS condition received an overall learning goal during the hypermedia learning task, while participants in the CS condition received five guiding questions in addition to the same overall learning goal during the hypermedia learning task. There are four findings from this study. First, results from the pretest and posttest indicated that prior domain knowledge significantly predicted both declarative and conceptual knowledge learning outcomes with hypermedia. Second, results from the self-report self-efficacy questionnaire indicated that while self-efficacy significantly fluctuated during learning, the provision of conceptual scaffolds was not related to this fluctuation. Third, results from a think-aloud protocol indicated that self-efficacy significantly predicted monitoring and planning processes, but not strategy use during the hypermedia learning task. Fourth, results from a think-aloud protocol also indicated that self-regulatory processes (particularly processes related to monitoring) significantly predicted conceptual and declarative learning outcomes. Educational and scientific implications are discussed.Item The Role of Syntax and Contextual Frame in Children's Use of a Causal Theory in Reasoning about Natural Kinds(2005-05-27) Hammond, Jane; Scholnick, Ellin K; Human Development; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)A central focus of cognitive development research is the nature and organization of knowledge. Some researchers claim that young children use an intuitive theory to help them understand foundational domains such as biological categories. In particular, researchers have studied whether children's biological concepts are embedded in a causal theory about the nature of living organisms. Two key features of this theory are the concept of biological essences and the use of inductive generalizations. This study examined the influence of contextual frame and logical conjunctions on access and use of the theory in elementary and middle school children. It also investigated whether that causal theory supports both inductive and deductive reasoning. Children were given inductive and deductive tasks involving natural kinds. In the inductive tasks the child was asked whether a property of an animal would be found in other animals varying in taxonomic distance from the animal. In the deductive task, children worked on syllogisms based on cues at different levels of a biological taxonomy. Older children were not as likely to make inductions about instances of less biological resemblance to the target. However they also made more accurate deductions regardless of level of the hierarchy. Inductive and deductive performance were not correlated. Whether the cues were stated in a sentence beginning with "if" or "all" had no significant impact on performance, but whether the problem was presented from the viewpoint of a scientist or a pet store owner affected performance. These results were used to re-examine the basic tenets of essentialist thinking and the nature of developmental changes in reasoning about biological kinds.