The effects of variable-time versus contingent reinforcement delivery on problem behavior maintained by escape.

Results of previous research indicate that the delivery of positive reinforcement (e.g., food) for an appropriate, alternative target response (e.g., compliance) or delivery of food on a time-based schedule can decrease problem behavior reinforced by escape, even when problem behavior continues to produce negative reinforcement (e.g., Lalli et al., ; Lomas, Fisher, & Kelley, ). In this study, we compared the levels of both compliance and problem behavior when food and praise were delivered either contingent on compliance or on a time-based schedule. Results for 3 of the 4 participants showed that contingent delivery of preferred edible items and praise was more effective in both reducing problem behavior and increasing compliance compared to variable-time delivery of these same items. These findings are discussed in the context of motivating operations and competition between positive and negative reinforcement.

Persisters and nonpersisters: Identifying the characteristics of who stays and who leaves from adult literacy interventions.

Adult literacy programs are characterized by high attrition rates. Rigorous exploration of student persistence in adult reading classes is lacking. This study was an attempt to understand the profiles of adults who completed reading classes compared to a group of adults who made it to the midpoint and a group of adults who did not make it to the midpoint. Students were offered 100 hours of instruction. Of the 395 students who attended the first day of class, only 198 completed the program. Results indicated that English language status, age, some reading related skills, class assignment, avoidance of reading, previous adult education experience, and Women, Infants, and Children (WIC) benefit receipt variables significantly predicted persistence. The significance of some of these predictors varied based on analyzing midpoint completion or full completion. To further explore the characteristics of the sample, the most representative participants were selected from the group that did not make it to midpoint and from the group that completed the program. Results indicated that the most representative members of these two groups differed in English language status, gender, age, some reading related skills, and information access.

Augmenting visual analysis in single-case research with hierarchical linear modeling.

The purpose of this article is to demonstrate how hierarchical linear modeling (HLM) can be used to enhance visual analysis of single-case research (SCR) designs. First, the authors demonstrated the use of growth modeling via HLM to augment visual analysis of a sophisticated single-case study. Data were used from a delayed multiple baseline design, across groups of participants, with an embedded changing criterion design in a single-case literacy project for students with moderate intellectual disabilities (MoID). Visual analysis revealed a functional relation between instruction and sight-word acquisition for all students. Growth HLM quantified relations at the group level and revealed additional information that included statistically significant variability among students at initial-baseline probe and also among growth trajectories within treatment subphases. Growth HLM showed that receptive vocabulary was a significant predictor of initial knowledge of sight words, and print knowledge significantly predicted growth rates in both treatment subphases. Next, to show the benefits of combining these methodologies to examine a different behavioral topography within a more commonly used SCR design, the authors used repeated-measures HLM and visual analysis to examine simulated data within an ABAB design. Visual analysis revealed a functional relation between a hypothetical intervention (e.g., token reinforcement) and a hypothetical dependent variable (e.g., performance of a target response). HLM supported the existence of a functional relation through tests of statistical significance and detected significant variance among participants' response to the intervention that would be impossible to identify visually. This study highlights the relevance of these procedures to the identification of evidence-based interventions.

Using simultaneous prompting to teach independent living and leisure skills to adults with severe intellectual disabilities.

The acquisition of independent living and leisure skills enables adults to experience an enhanced quality of life by increasing competence, self-reliance, and the development of autonomy. This study examined the effectiveness of simultaneous prompting to teach behavior chains (i.e., independent living and leisure skills) to adults with SID individually in their home environments. Participants included two adults with SID receiving services from a not-for-profit agency that provides community-based services and supports to persons with disabilities. The results of this study are the first to indicate the effectiveness of simultaneous prompting to teach independent living and leisure skills to adults with SID using a one-on-one format in their home environment. Both participants learned three different skills within 12-28 sessions and maintained each skill 1, 2, and 4 weeks after mastery.

Effects of error correction during assessment probes on the acquisition of sight words for students with moderate intellectual disabilities.

Simultaneous prompting is an errorless learning strategy designed to reduce the number of errors students make; however, research has shown a disparity in the number of errors students make during instructional versus probe trials. This study directly examined the effects of error correction versus no error correction during probe trials on the effectiveness and efficiency of simultaneous prompting on the acquisition of sight words by three middle school students with moderate intellectual disabilities. A single-case adapted alternating treatments (Sindelar, Rosenberg, & Wilson, 1985) embedded in a multiple baseline across word sets design was employed to examine the effects of error correction during probe trials in order to reduce error rates. A functional relation was established for two of the three students for the use of error correction during probe sessions to reduce error rates. Error correction during assessment probes required fewer sessions to criterion, resulted in fewer probe errors, resulted in a higher percentage of correct responding on the next subsequent trial, and required less total probe time. For two of the three students, probes with error correction resulted in a more rapid acquisition rate requiring fewer sessions to criterion.

Teaching the reading of connected text through sight-word instruction to students with moderate intellectual disabilities.

Sight-word instruction is the most common method of reading instruction for students with Moderate Intellectual Disabilities reported in the research literature. The purpose of this study was to go beyond instruction of single word units to instruction of multiple-word phrases. This study demonstrated the instruction of reading and comprehending individual words and connected text through the use of simultaneous prompting. Instruction progressed through a series of phases which systematically introduced various parts of speech and combinations of parts of speech. Following acquisition, students demonstrated generalization across connected text found in community environments and leisure-reading materials.

Using simultaneous prompting to teach sounds and blending skills to students with moderate intellectual disabilities.

The purpose of this study was to examine the effects of simultaneous prompting on acquisition of letter-sound correspondences and blending skills of previously taught words for three elementary students with moderate intellectual disabilities, and to measure generalization of those skills to untaught words. The three students were first taught to read five nouns using sight-word instruction. After acquisition of the five words the students were taught letter-sound correspondences and to blend the sounds in order to apply word-analysis skills. All the students demonstrated application of letter-sound correspondences and blending skills to read the five sight words and the untaught, generalization words. This study took place across two partial academic school years and therefore provides regression and recoupment data for the students.

Functional analysis and treatment of multiply controlled inappropriate mealtime behavior.

Functional analyses identified children whose inappropriate mealtime behavior was maintained by escape and adult attention. Function-based extinction procedures were tested individually and in combination. Attention extinction alone did not result in decreases in inappropriate mealtime behavior or a significant increase in acceptance. By contrast, escape extinction alone resulted in a decrease in inappropriate mealtime behavior and an increase in acceptance. However, inappropriate mealtime behavior did not decrease to clinically acceptable levels. A combined extinction technique (i.e., escape and attention extinction) resulted in a decrease in inappropriate mealtime behavior to clinically acceptable levels and high and stable acceptance.