In the social sciences, evaluating the effectiveness of a program or intervention often leads researchers to draw causal inferences from observational research designs. Bias in estimated causal effects becomes an obvious problem in such settings. This article presents the Heckman Model as an approach sometimes applied to observational data for the…

Mobile Learning, or M-learning as it is often called, is a relatively new tool in the pedagogical arsenal to assist students and teachers as they navigate the options available in the expanding distance learning world. This article assesses some of the possible methods, challenges and future potential of using this approach in a college classroom…

Xu and von Davier (2006) demonstrated the feasibility of using the general diagnostic model (GDM) to analyze National Assessment of Educational Progress (NAEP) proficiency data. Their work showed that the GDM analysis not only led to conclusions for gender and race groups similar to those published in the NAEP Report Card, but also allowed…

Based on literature and research on discussion and on educational techniques to improve discussion moderators behaviors, a training program was developed for pre- and in-service teacher educators, business and industry executives and university professors (23 to 28 hours, three and a half days). This program was tested for its effectiveness with…

A dramatic shift in research priorities has recently produced a large number of ambitious randomized trials in K-12 education. In most cases, the aim is to improve student academic learning by improving classroom instruction. Embedded in these studies are theories about how the quality of classroom must improve if these interventions are to…

Students can imitate scientists at work by conducting inquiry investigations in the classroom, thereby exhibiting a multitude of skills and competencies. As stated by Bransford and Donovan (2005), learning science as a process of inquiry involves students in observation, imagination, and reasoning about the phenomena under investigation. Rather…

This article highlights the problem of omitted variable bias in research on the causal effect of financial aid on college-going. I first describe the problem of self-selection and the resulting bias from omitted variables. I then assess and explore the strengths and weaknesses of random assignment, multivariate regression, proxy variables, fixed…

Objective: Two studies examined whether accessibility of hostility-related schema influenced ratings of ambiguous child pictures. Based on the social information processing model of child physical abuse (CPA), it was expected that CPA risk status would serve as a proxy for chronic accessibility of hostile schema, while priming procedures were used…

In a well-designed experiment, random assignment of participants to treatments makes causal inference straightforward. However, if participants are not randomized (as in observational study, quasi-experiment, or nonequivalent control-group designs), group comparisons may be biased by confounders that influence both the outcome and the alleged…

Assessed 3- to 7-year-old children's sensitivity to logical necessity by contrasting performance in insufficient and sufficient information conditions. A search task used in Experiments 1 and 2 allowed children to search for additional information in insufficient conditions. A judgement condition used in Experiment 2 required a "can't tell"…

The use of finite intersection tests (FIT) to unify methods for simultaneous inference and to test orthogonal contrasts is discussed. Multiple comparison procedures that combine FIT with sequential hypothesis testing are illustrated, and a simulation strategy is presented to generate values needed for FIT methods. (SLD)

Investigates the time course of predictive inferences by using naming and word reading times. Explains the setup and results of two different experiments. Suggests that predictive inferences occur online, but require time to be drawn and are initially encoded to some degree, but completed later. (PA)

Assesses various Fuhriman, Burlingame, Kivlighan, and Richards articles (1990) as interesting and informative, but offers two criticisms. First, authors made same vocabulary/same meaning assumption about articles they reviewed and did not discuss differences in experiences and truths that might lie behind same vocabulary. Second, they did not…

Investigates good and poor readers' ability to answer text-based inference and paraphrase questions after reading two narrative stories and two expository passages. Finds that expository passages are significantly more difficult for children to understand than narrative stories, and that good readers read texts faster than poor readers. (MM)

Sixty undergraduate college students took part in two experiments designed to test the hypothesis that the involvement of inference in remembering leads to overconfidence. Discusses the response-independence model, which is appropriate to retrieval, and the response-dependence model, which applies to inference. (DR)