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51.
John M. Ferron Bethany A. Bell Melinda R. Hess Gianna Rendina-Gobioff Susan T. Hibbard 《Behavior research methods》2009,41(2):372-384
Multiple-baseline studies are prevalent in behavioral research, but questions remain about how to best analyze the resulting
data. Monte Carlo methods were used to examine the utility of multilevel models for multiplebaseline data under conditions
that varied in the number of participants, number of repeated observations per participant, variance in baseline levels, variance
in treatment effects, and amount of autocorrelation in the Level 1 errors. Interval estimates of the average treatment effect
were examined for two specifications of the Level 1 error structure (σ2
I and first-order autoregressive) and for five different methods of estimating the degrees of freedom (containment, residual,
between—within, Satterthwaite, and Kenward—Roger). When the Satterthwaite or Kenward—Roger method was used and an autoregressive
Level 1 error structure was specified, the interval estimates of the average treatment effect were relatively accurate. Conversely,
the interval estimates of the treatment effect variance were inaccurate, and the corresponding point estimates were biased. 相似文献
52.
53.
Spielman BJ 《Journal of religion and health》1986,25(2):142-148
This paper calls for a shift away from autonomy as the central value in geriatric ethics. In treatment and experimental settings, differences between older and younger adults are easily attributed to deficiencies on the part of the elderly when autonomy is the central value. Overemphasis on the concept of autonomy skews our understanding of human relationships toward excessively rational models, distracts attention from important physical and social characteristics of aged persons, and results in ethics by default. This paper describes several principles that would be more useful starting points than autonomy in developing a geriatric ethic. 相似文献
54.
Research has shown that noncontingent reinforcement (NCR) can be an effective behavior-reduction procedure when based on a functional analysis. The effects of NCR may be a result of elimination of the contingency between aberrant behavior and reinforcing consequences (extinction) or frequent and free access to reinforcers that may reduce the participant's motivation to engage in aberrant behaviors or mands. If motivation is momentarily reduced, behavior such as mands may not be sensitive to positive reinforcement. In this study, for 3 children with aberrant behavior maintained by tangible positive reinforcement, differential-reinforcement-of-alternative-behavior schedules were superimposed on NCR schedules to determine if mands could be strengthened. Results for the participants indicated that NCR did not preclude reinforcement of mands. 相似文献
55.
Timothy R. Vollmer Bethany A. Marcus Joel E. Ringdahl 《Journal of applied behavior analysis》1995,28(1):15-26
We extended research on the role of noncontingent positive reinforcement following a functional analysis of attention-maintained self-injurious behavior to self-injury maintained by negative reinforcement in 2 young males with developmental disabilities. During a pretreatment functional analysis, each participant's self-injury was shown to be differentially sensitive to escape from instructional activities as negative reinforcement. During noncontingent escape, escape from learning activities was provided on a fixed-time schedule that was not influenced by the participant's behavior. One participant was also exposed to differential negative reinforcement of other behavior. During this condition, escape from instructional activities was provided contingent on the omission of self-injury for prespecified intervals. Results showed that the provision of escape, even when noncontingent, resulted in significant reductions in self-injury. These results are particularly interesting in light of the experimental history of noncontingent reinforcement as a control rather than as a therapeutic procedure. Noncontingent escape is discussed as a form of extinction that may be less likely than other forms of extinction to produce severe side effects. 相似文献
56.
Timothy R. Vollmer Joel E. Ringdahl Henry S. Roane Bethany A. Marcus 《Journal of applied behavior analysis》1997,30(1):161-164
Noncontingent reinforcement (NCR) has emerged as a treatment package for severe behavior problems. Although concerns about potential side effects (such as incidental reinforcement) have been raised, there have been few reported negative side effects in published studies to date. In this article, we report an NCR treatment evaluation for severe aggression that produced (a) an extinction burst and (b) incidental reinforcement. These side effects were evaluated by examining within-session response patterns and response distributions. As a solution, a brief omission contingency was added to the reinforcement schedule. The omission contingency resulted in decreased aggression rates. 相似文献
57.
Research teams have made considerable progress in treating absolute uterine factor infertility through uterus transplantation, though studies have differed on the choice of either deceased or living donors. While researchers continue to analyze the medical feasibility of both approaches, little attention has been paid to the ethics of using deceased versus living donors as well as the protections that must be in place for each. Both types of uterus donation also pose unique regulatory challenges, including how to allocate donated organs; whether the donor / donor's family has any rights to the uterus and resulting child; how to manage contact between the donor / donor's family, recipient, and resulting child; and how to track outcomes moving forward. 相似文献
58.
The medical drama and its central character, the doctor-hero have been a mainstay of popular television. House M.D. offers a new (and problematic) iteration of the doctor-hero. House eschews the generic conventions of the "television doctor" by being neither the idealized television doctor of the past, nor the more recent competent but often fallible physicians in entertainment texts. Instead, his character is a fragmented text which privileges the biomedical over the personal or emotional with the ultimate goal of scientifically uncovering and resolving instances of disease. This article examines the implicit and explicit messages in House M.D. and critically analyzes both the show and its lead character in relation to the traditional medical drama genre that highlights the "doctor-hero" as the central character. While at first House seems to completely violate narrative and generic norms, ultimately the program provides a new form that reinforces the presence of the doctor-hero, but highlights House's character as the central figure who is personally and interpersonally problematic but biomedically effective. 相似文献
59.
Automatic processing in spider phobia: implicit fear associations over the course of treatment 总被引:11,自引:0,他引:11
This study evaluates the cognitive model of anxiety by investigating treatment-related changes in automatic associations to evaluate schematic processing. Spider-phobic participants (n = 31) and healthy controls (n = 30) completed fear-based Implicit Association Tests (IATs), which are reaction-time measures that tap implicit associations without requiring conscious introspection. The specific tasks involved classifying pictures of snakes and spiders along with semantic categorizations (good vs.bad, afraid vs. unafraid, danger vs. safety, and disgusting vs. appealing). Phobic individuals were assessed before and after group-based exposure treatment and 2 months later, controls were assessed at matched time points. Results supported clinical applications for implicit fear associations, including prediction of phobic avoidance, and treatment sensitivity of the fear- and disgust-specific automatic associations. 相似文献
60.
Henry S. Roane Timothy R. Vollmer Joel E. Ringdahl Bethany A. Marcus 《Journal of applied behavior analysis》1998,31(4):605-620
We evaluated the utility of a brief (5-min) stimulus preference assessment for individuals with developmental disabilities. Participants had noncontingent (free) access to an array of stimuli and could interact with any of the stimuli at any time. Stimuli were never withdrawn or withheld from the participants during a 5-min session. In Experiment 1, the brief preference assessment was conducted for 10 participants to identify differentially preferred stimuli, and reinforcer assessments were conducted to test the reinforcing efficacy of those stimuli identified as highly preferred. In Experiment 2, a comparison was conducted between the brief preference assessment and a commonly used paired-stimulus preference assessment. Collectively, results demonstrated that the brief preference assessment identified stimuli that functioned as reinforcers for a simple operant response, identified preferred stimuli that were differentially effective as reinforcers compared to nonpreferred stimuli, was associated with fewer problem behaviors, and required less time to complete than a commonly used paired-stimulus preference assessment. 相似文献