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AbstractPrevious studies have found that infrequent targets can reduce dogs' vigilance. The purpose of this study was to develop a laboratory model to evaluate the effects of infrequent targets on dogs' search behavior and performance. Dogs (n = 18) were trained to detect smokeless powder in an automated olfactometer in two distinct rooms (“operational” and “training”). During baseline, the dogs received five daily sessions at a high target odor frequency (90%) in both rooms. Subsequently, the frequency of the target odor was decreased to 10% only in the “operational” room but remained at 90% in the training room. Last, the odor prevalence was returned to 90% in both rooms. All dogs showed a significant decrement in detection performance in the operational room when the target odor frequency was decreased but simultaneusly mantained high performance in the training room. This decrement was largely due to decreases in adequate search behavior. All dogs recovered performance when the odor frequency was increased again to 90%. Trial accuracy was associated with tail position, search score, latency, and duration of environmentally directed behaviors. The data show that low target odor prevalence significantly reduced search behavior and performance and that there are behaviors that can be used by handlers to assess their dog's search state.

AbstractDetection dogs have demonstrated reduced performance in operational settings when required to search in an environment where few to no target odors are present. This study's purpose was to increase detection dog accuracy using noncontingent reward (NCR) and Pavlovian stimuli associated with reward. Eighteen dogs were randomly spilt into two groups and received four 40‐trial sessions in an operational and training context at 90% odor prevalence (baseline). Following baseline, in the operational context (now at 10% odor prevalence), experimental dogs received an NCR schedule consisting of delivering food rewards at the end of 66% of trials. After the NCR Test, dogs returned to baseline. During baseline, the experimental dogs received 10 days of delayed Pavlovian conditioning to a tone. During the test phase, the conditioned stimulus (tone) was presented to experimental dogs on average every two trials for 30 s in the operational context (now at 10% odor prevalence). Overall, NCR showed a nonsignificant trend for increased responding in the experimental group but tended to increase false alerts; therefore, a permutation of an NCR‐like reward schedule may maintain search. The Pavlovian conditioned stimulus didn't decrease timeouts or improve accuracy, but a within‐session analysis indicated that the dogs were more likely to time out and less likely to false alert when the tone was on than when it was off.

AbstractThis article applies a two‐process “neural autopilot” model to field data. The autopilot model hypothesizes that habitual choice occurs when the reward from a behavior has low numerical “doubt” (i.e., reward prediction errors are small). The model toggles between repeating a previous choice (habit) when doubt is low and making a goal‐directed choice when doubt is high. The model has ingredients established in animal learning and cognitive neuroscience and is simple enough to make nonobvious predictions. In two empirical applications, we fit the model to field data on purchases of canned tuna and posting on the Chinese social media site Weibo. This style of modeling is called “structural” because there is a theoretical model of how different variables influence choices by agents (the “structure”), which tightly restricts how hidden variables lead to observed choices. There is empirical support for the model, more strongly for tuna purchases than for Weibo posting, relative to a baseline “reduced‐form” model in which current choices are correlated with past choices without a mechanistic (structural) explanation. An interesting set of predictions can also be derived about how consumers react to different kinds of changes in prices and qualities of goods (this is called “counterfactual analysis”).

AbstractProcedural fidelity is defined as the extent to which the independent variable is implemented as prescribed. Research using computerized tasks has shown that fidelity errors involving consequences for behavior can hinder skill acquisition. However, studies examining the effects of these errors once skills have been mastered are lacking. Thus, this translational study investigated the effects of varying levels of fidelity following mastery of a computerized arbitrary matching‐to‐sample task. A group design (consisting of five groups) was used in which college students initially completed 250 trials during which no programmed errors (i.e., perfect fidelity) were arranged, followed by an additional 250 trials with consequences delivered across various levels of fidelity (i.e., 20, 40, 60, 80, and 100% of trials administered without errors). The results showed that participants assigned to higher fidelity conditions performed better (on average). These results extended the findings of previous studies by demonstrating how errors involving consequences affect behavior across various stages of learning.

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AbstractThis study adopted a pragmatic trial with randomization to investigate the relative effectiveness of web versus live training on special educators' competence and perceived skills in functional behavior assessments (FBA) and behavior interventions. Pragmatic trials seek to determine the effectiveness of an intervention in a real‐world setting to ensure better application and generalizability in routine practice conditions. The live training group received an in‐person workshop delivered in a lecture format via powerpoint slides. The web training group received asynchronous online instruction via a secure website. The same training content was delivered to both groups. Participants were randomly assigned across both instructional modalities and completed two pre‐ and post‐test measures. Results indicated that participants (N = 104) in both groups showed a significant increase in theoretical competence of FBA and behavior interventions post training. Only participants in the live workshop group reported a significant increase in perceived skill scores. When comparing outcomes across groups, the live training group gained significantly more theoretical competence in FBA and behavior interventions than that in the web training group. These results shed light on the practical implications of online platforms for professional development among in‐service teachers in behavior management for schools with children having disabilities and challenging behavior.

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AbstractThis study sought to enhance current dog training practices by determining whether a finding from human motor skill learning research, the contextual interference (CI) effect, could be replicated in a trick‐training paradigm with companion dogs. In humans, research shows that practicing skills in random order, as compared with blocked order, improves learning of those skills. To test this question in dogs, we randomly allocated 17 dogs to blocked training (low CI) or random training (high CI). The dogs performed three behaviors of varying difficulty. After training, we conducted a retention test in which half of the dogs in each group performed the tasks in blocked order and the other half in random order. We scored each trick, measured duration, and measured whether dogs required one or two tries to perform a behavior. We found no significant differences between dogs who practiced three tricks in random or in blocked order during training and during a retention test. This study is the first to apply the CI effect to dog trick training. Although no evidence of the CI effect was found, the current research provides a preliminary framework for future studies with potential implications for increasing retention of trained skills.

AbstractConceptual behavior represents a type of complex stimulus control where an organism differentially responds to examples and nonexamples of instances within a stimulus class. Different species have demonstrated conceptual behavior both in their natural environments and through experimental investigations. The current paper investigates preliminary methods to teach conceptual behavior to gray wolves (Canis lupus). The researchers used a match‐to‐sample arrangement to teach three shapes: a triangle, square, and cross varying in size, color, and positions. Probe trials used a novel set of stimuli to test for the emergence of conceptual behavior. Although the wolves did not show an immediate transfer to novel stimuli following initial match‐to‐sample training, they did show improvement after explicit discrimination training. We discuss the implications of these results as well as future methods that may enhance experimental procedures investigating concept learning in canids.

“Seleção pelas consequências” é um tema caro à Análise do Comportamento, isso porque refere-se a um modo explicativo para o fenômeno psicológico alternativo a outras explicações tradicionais. Ademais, parece ser justamente o “selecionismo” que permite a investigação da compatibilidade de diversas propostas de intervenção, com as premissas filosóficas assumidas e adotadas pelo behaviorismo de Skinner. Tendo em vista a importância da noção de seleção pelas consequências para a delimitação do campo de interesse da Análise do Comportamento, e para a aplicação dessa ciência nos estudos sobre o comportamento humano, este trabalho tem dois objetivos. A partir de três aspectos previamente sugeridos como definidores do princípio explicativo selecionista, pretende-se apresentar aspectos dos escritos skinnerianos publicados na década de 1950 que possam elucidar o processo de construção da noção de seleção por consequências. Ademais, busca-se evidenciar como o clássico Ciência e Comportamento Humano é central para a compreensão de como tais aspectos foram sendo construídos historicamente e como alguns termos chaves foram explorados nesse livro. Conclui-se que se trata de um período transitório, em que tal princípio não se mostrou completamente consolidado, uma vez que o selecionismo não refletiu nesse momento uma noção alternativa de causalidade.