The present study evaluated the efficacy of a set of procedures for bringing tact extensions of abstract tactile properties under stimulus control. Two participants with disabilities who communicated via a picture-based communication system received reinforcement for tacts of tactile properties of four wet/dry and four hard/soft stimuli. Test…

The basic form of the superlative suffix in German is -"st (kleinst"-), with some adjectives requiring a longer form, -"est (lautest"-). While the superlative has long been a topic in teaching materials, the accuracy of textbook treatments continues to be less than satisfactory. The difficulty arises in characterizing the…

This article provides a validation framework for research on the development and use of science Learning Progressions (LPs). The framework describes how evidence from various sources can be used to establish an interpretive argument and a validity argument at five stages of LP research--development, scoring, generalisation, extrapolation, and use.…

In this study, the author examined student attempts to translate a verbal problem into an algebraic statement relating two variables, after they had solved an arithmetic question from the same problem. A total of 645 students from New England (U.S.A.) answered the problem on a mathematics assessment administered at the beginning of the school…

This article provides a validation framework for research on the development and use of science Learning Progressions (LPs). The framework describes how evidence from various sources can be used to establish an interpretive argument and a validity argument at five stages of LP research--development, scoring, generalisation, extrapolation, and use.…

Periodically, articles reporting research on student ratings of instruction (SRI), aka student evaluations of teaching, appear in the higher-education press. This literature often summarizes studies that challenge the validity and reliability of SRI. However, before drawing a conclusion about a quantitative study touted in the media, readers…

This study evaluated the implementation of the school-based Prevent-Teach-Reinforce (PTR) model within multi-tiered systems of support (MTSS) for elementary school students engaging in high levels of problem behavior. Three students and their classroom teachers in two public schools participated in the team-based PTR process during which they…

Access to employment opportunities is associated with increased quality of life for people with intellectual and developmental disabilities; however, many adults with intellectual and developmental disabilities struggle to find employment. One reason they may have difficulty achieving employment is an inability to work independently.…

We examined the use of an intervention package consisting of the system of least prompts (SLP), visual schedules, peer models, and contingent reinforcement to teach four children with disabilities to independently play board games and communicate with their typically developing peers. We found the intervention package with individual adaptations…

The objective of this article is to describe types of mathematical reasoning evidenced by a middle school mathematics teacher, when answering two generalization questions in a figural pattern generalization task, related to quadratic sequences. Reasoning is delimited from teacher's arguments, reconstructed from a theoretical-methodological…

Frequent forced switching between tasks has been shown to reduce switch costs and increase voluntary switch rates. So far, however, the boundary conditions of the influence of forced task switching on voluntary task switching are unknown. Thus, the present study was aimed to test different aspects of generalizability (across items, tasks, and…

Recent research provides evidence that an intersectional approach to defining reference and focal groups results in a higher percentage of comparisons flagged for potential DIF. The study presented here examined the generalizability of this pattern across methods for examining DIF. While the level of DIF detection differed among the four methods…

Foreign accents can vary considerably in the degree to which they deviate from the listener's native accent, but little is known about how the relationship between a speaker's accent and a listener's native language phonology mediates adaptation. Using an artificial accent methodology, we addressed this issue by constructing a set of three…

Algebraic thinking in children can bridge the cognitive gap between arithmetic and algebra. This quantitative study aimed to develop and test a cognitive model that examines the cognitive factors influencing algebraic thinking among Year Five pupils. A total of 720 Year Five pupils from randomly selected national schools in Malaysia participated…

Many researchers and practitioners cite concerns with maintenance and generalization as a serious issue for individuals with autism spectrum disorders (ASD), although few studies explicitly target performance of behaviors outside training environments. After an initial intervention failed to produce robust generalization outcomes, the present…