A dual-source model of probabilistic conditional inference is proposed. According to the model, inferences are based on 2 sources of evidence: logical form and prior knowledge. Logical form is a decontextualized source of evidence, whereas prior knowledge is activated by the contents of the conditional rule. In Experiments 1 to 3, manipulations of…

Many adults who need an understanding of statistical concepts have limited mathematical skills. They need a teaching approach that includes as little mathematical context as possible. Iterative participatory qualitative research (action research) was used to develop a statistical literacy course for adult learners informed by teaching in…

Writing may be an especially useful tool for improving the reading comprehension of lower performing readers and students with disabilities. However, it is reasonable to expect that students with poor writing skills in particular, may actually be less adept at using writing to improve their reading skills, and may not be able to do so without…

Japanese has a rich set of focus particles, several exclusive and additive particles, and, in addition, contrastive particles. This thesis provides a formal description of the meanings of Japanese focus particles and addresses two general questions: "What kinds concepts do Japanese focus particles express?" and "Why does Japanese have a larger…

There are at least two procedures to assess item difficulty stability in the Rasch model: robust z procedure and "0.3 Logit Difference" procedure. The robust z procedure is a variation of the z statistic that reduces dependency on outliers. The "0.3 Logit Difference" procedure is based on experiences in Rasch linking for tests…

Appropriate behavior in relation to an object often requires judging whether it is owned and, if so, by whom. The authors propose accounts of how people make these judgments. Our central claim is that both judgments often involve making inferences about object history. In judging whether objects are owned, people may assume that artifacts (e.g.,…

Successful language acquisition involves generalization, but learners must balance this against the acquisition of lexical constraints. Such learning has been considered problematic for theories of acquisition: if learners generalize abstract patterns to new words, how do they learn lexically-based exceptions? One approach claims that learners use…

Object use is a ubiquitous characteristic of the human species, and learning how objects function is a fundamental part of development. In this article the authors examine the role that intentionality plays in children's understanding of causal relationships during observational learning of object use. Children observed demonstrations in which…

Cross-national comparisons of IQ have become common since the release of a large dataset of international IQ scores. However, these studies have consistently failed to consider the potential lack of independence of these scores based on spatial proximity. To demonstrate the importance of this omission, we present a re-evaluation of several…

This study examined the effect of different goals (process, performance outcome, and multiple goals) and self-recording on self-regulation of learning a dart-throwing skill. Participants were 105 fifth and sixth graders who were randomly assigned to six (3 Goal type x 2 self-recording) experimental and one control group. Results showed a positive…

This study investigated whether gesture can enhance the pragmatic comprehension of language impaired children. Language impaired children (N = 21) and age matched typically developing children (N = 26) were presented verbal scenarios in two conditions: speech only and speech+gesture. In the speech+gesture condition, speech was accompanied by…

Displaying guilt after a transgression serves to appease the victim and other group members, restore interpersonal relationships, and indicate the transgressors' awareness of and desire to conform to the group's norms. We investigated whether and when young children are sensitive to these functions of guilt displays. In Study 1, after 4- and…

In this intervention study, teachers tried to implement four instructional principles derived from the literature on research-based, explicit reading comprehension instruction in their fifth-grade classrooms. The principles focused on relevant background knowledge, reading comprehension strategies, reading-group organization, and reading…

The study examines the resources related to science that African American young men learn and develop by playing a card game called Spades, a common cultural practice in African American communities that dates back to the Civil War Era. The qualitative study examines what the Spades players at a local high school consider when making decisions…

Research has demonstrated that children use different strategies to infer a referent. One of these strategies is to use inflectional morphology. We present evidence that toddlers learning Spanish are capable of using gender word inflections to infer word reference. Thirty-month-olds were tested in a preferential looking experiment. Participants…