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This methodological review draws attention to the challenges faced by intellectual and developmental disabilities researchers in the appropriate design and analysis of group comparison studies. We provide a brief overview of matching methodologies in the field, emphasizing group-matching designs used in behavioral research on cognition and language in neurodevelopmental disorders, including autism spectrum disorder, Fragile X syndrome, Down syndrome, and Williams syndrome. The limitations of relying on p values to establish group equivalence are discussed in the context of other existing methods: equivalence tests, propensity scores, and regression-based analyses. Our primary recommendation for advancing research on intellectual and developmental disabilities is the use of descriptive indices of adequate group matching: effect sizes (i.e., standardized mean differences) and variance ratios.

This quasi-experimental study measured the impact of Project Lead the Way (PLTW) instruction and professional development training on the views and expectations regarding engineering learning, instruction and career success of nascent pre college engineering teachers. PLTW teachers' initial and changing views were compared to the views exhibited by a matching group of high school STEM teachers. The primary instrument was the Engineering Beliefs and Expectation Instruments for Teachers (EEBEI-T), which included Likert scale items, contextualized judgments about fictional student vignettes, and demographic items. Teachers' baseline survey responses, on average, revealed the importance of academic achievement on teachers' decision making about who should enroll in future engineering classes and their predictions of who would be most likely to succeed in an engineering career. When making implicit comparisons between students who differed by SES, teachers generally favored enrollment and predicted more career success of high SES students. SES was excluded as a factor in the judgments of all participating teachers when explicitly probed, however. Preexisting group differences showed that budding PLTW teachers reported on STEM integration in their classes with greater frequency than control teachers, while control teachers agreed more strongly about the pre-requisite role of high scholastic achievement for engineering studies. Finally, an analysis of teachers' changing views indicated that nascent PLTW teachers increased their reporting of effective STEM integration over time, above and beyond pre-existing group differences and re-testing effects. In light of these data we explore the challenges of implementing effective STEM integration in high school classrooms, examine issues of attracting underrepresented students to engineering, and discuss some of the inherent tensions of engineering education at the K-12 level.

Purpose: This randomized controlled trial evaluated the impact of SurvivorCHESS, an eHealth intervention, on physical activity in colon cancer survivors and to explore the impact of SurvivorCHESS on quality of life and distress.Methods: This was a two-arm single-blinded multi-site randomized controlled trial comparing a control group to an intervention group receiving a smartphone with the SurvivorCHESS program.Results: Participants using SurvivorCHESS (n = 144) increased their moderate to vigorous physical activities from 19.4 min at baseline to 50 min compared to the control group (n = 140) increasing from 15.5 to 40.3 min at 6 months (p = .083) but was not sustained 3 months after the study ended. No significant differences were found between groups over time for quality of life or distress items. Reports of physical symptoms were greater than other categories for distress items. Patients who had a higher body mass index and number of comorbid conditions were less likely to increase their physical activity. Self-determination theory including autonomous motivation and relatedness was not associated with the outcomes.Conclusions: Physical activity did increase over time in both groups and was not significantly different with the use of the eHealth intervention, SurvivorCHESS, compared to the control group. The amount of SurvivorCHESS use was not associated with physical activity.Implications For Cancer Survivors: Increasing physical activity in colon cancer survivors has the potential to improve quality of life and reduce recurrences. Using smartphone-tracking devices may be useful in helping to change this health behavior. [ABSTRACT FROM AUTHOR]