Purpose: The purpose of this study was to describe biomechanical correlates of the surface electromyographic signal obtained during swallowing by healthy adult volunteers. Method: Seventeen healthy adults were evaluated with simultaneous videofluoroscopy and surface electromyography (sEMG) while swallowing 5 mL of liquid barium sulfate. Three…

Purpose: Previous research has demonstrated the fluency-improving effect of reducing the occurrence of short-duration, phonated intervals (PIs; approximately 30-150 ms) in individuals who stutter, prompting the hypothesis that PIs in these individuals' speech are not distributed normally, particularly in the short PI ranges. It has also been…

The authors propose new procedures for evaluating direct, indirect, and total effects in multilevel models when all relevant variables are measured at Level 1 and all effects are random. Formulas are provided for the mean and variance of the indirect and total effects and for the sampling variances of the average indirect and total effects.…

The effects of rate of conditioned reinforcement on the resistance to change of operant behavior have not been examined. In addition, the effects of rate of conditioned reinforcement on the rate of observing have not been adequately examined. In two experiments, a multiple schedule of observing-response procedures was used to examine the effects…

A model of conditional discrimination performance (Davison & Nevin, 1999) is combined with the notion that unmeasured attending to the sample and comparison stimuli, in the steady state and during disruption, depends on reinforcement in the same way as predicted for overt free-operant responding by behavioral momentum theory (Nevin & Grace, 2000).…

Two experiments examined whether postsample signals of reinforcer probability or magnitude affected the accuracy of delayed matching to sample in pigeons. On each trial, red or green choice responses that matched red or green stimuli seen shortly before a variable retention interval were reinforced with wheat access. In Experiment 1, the…

Young adulthood is filled with major life events and pursuing higher education is one of the most common transitions. It is also the time when many young adults enter the labour market, move out of their parents' household and begin family formation. These significant events affect each other and impact the rest of their lives. Given the…

The higher education pay and prices index (HEPPI) measures the general price level facing higher education institutions in the UK. It was produced at six-monthly intervals since it was started in 1956 but from the July 2006 edition it has been published annually, reflecting the fact that we are in a period of (relatively) low inflation in the UK…

The purpose of this study was to evaluate the effectiveness of using picture activity schedule books to increase on-schedule and on-task behaviors of children with moderate intellectual disabilities. Four students enrolled in a self-contained classroom participated in the study. Graduated guidance, system of least prompts, and verbal prompting…

The study evaluated the effects of the use of interval running training techniques instead of the traditional physical training methods employed at the U.S. Marine Corps Officer Candidate School. One platoon was trained by use of interval running techniques while a control platoon employed the continuous running method. Both methods improved the…

This research evaluated the total-time hypothesis for the learning of connected discourse--that in verbal learning "a fixed amount of time is necessary to learn a fixed amount of material regardless of the number of individual trials into which that time is divided." Learning material consisted of two sets of connected discourse for each of the…

The 4-4-1 plan adopted by Wesleyan College in North Carolina is reviewed with reference to the use of the May term or mini-semester. The lack of anticipated increased use of library resources is emphasized and suggestions are offered for changing this trend of the last three years. (LBH)

In studies of change in education and numerous other fields, interest often centers on how differences in the status of individuals at the start of a time period of substantive interest relate to differences in subsequent change. This report presents a fully Bayesian approach to estimating three-level hierarchical models in which latent variable…

Study shows that additional reviews are not only highly effective in terms of delayed retention, but also are very efficient in terms of numbers of examples used as well as amount of time spent on those examples. (Author/CB)

Thirty-six pairs of mixed-sex siblings were observed for two 1-hour periods in their homes. The younger siblings averaged 20 months of age and the interval between siblings was either large or small. Results are compared with a previous study of same-sex sibling interaction. (Author/RH)