This article reports the results of a nationwide audit study testing how

Student modeling within intelligent tutoring systems is a task largely driven by binary models that predict student knowledge or next problem correctness (i.e., Knowledge Tracing (KT)). However, using a binary construct for student assessment often causes researchers to overlook the feedback innate to these platforms. The present study considers a novel method of tabling an algorithmically determined partial credit score and problem difficulty bin for each student's current problem to predict both binary and partial next problem correctness. This study was conducted using log files from ASSISTments, an adaptive mathematics tutor, from the 2012-2013 school year. The dataset consisted of 338,297 problem logs linked to 15,253 unique student identification numbers. Findings suggest that an efficiently tabled model considering partial credit and problem difficulty performs about as well as KT on binary predictions of next problem correctness. This method provides the groundwork for modifying KT in an attempt to optimize student modeling.

This article reports the results of a nationwide audit study testing how Christian churches welcome potential newcomers to their churches as a function of newcomers' race and ethnicity. We sent email inquiries to 3,120 churches across the United States. The emails were ostensibly from someone moving to the area and looking for a new church to attend. That person's name was randomly varied to convey different racial and ethnic associations. In response to these inquiries, representatives from mainline Protestant churches-who generally embrace liberal, egalitarian attitudes toward race relations-actually demonstrated the most discriminatory behavior. They responded most frequently to emails with white-sounding names, somewhat less frequently to blackor Hispanic-sounding names, and much less to Asian-sounding names. They also sent shorter, less welcoming responses to nonwhite names. In contrast, evangelical Protestant and Catholic churches showed little variation across treatment groups in their responses. These findings underscore the role of homophily, organizational homogeneity, and the costs of racial integration in perpetuating the racial segregation of American religious life.

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This article explores behavioural norms and consequences of their transgression during Mainline Protestant and Catholic church services in the Northeastern United States. We utilize Erving Goffman's essay “On Face-Work” as our primary theoretical orientation. Based on fieldwork conducted at twelve different churches in two Northeastern states, we found multiple types of social disruptions, sanctions, and attempted repairs occurring in services. Our findings highlight the normative complexity of religious services and have implications for a variety of collective endeavours.