Stimulus equivalence instruction of fraction-decimal relations

Stimulus control technology was applied to the instruction of fraction ratio (e.g., (1/5)) and decimal (e.g., 0.20) relations, with 7 students who demonstrated difficulty in fraction and decimal tasks. The students were trained to match pictorial representations of fractions (B comparison stimuli) to printed counterpart fraction ratios (A sample stimuli), and to match printed decimals (C comparison stimuli) to pictorial representations of counterpart quantities (B sample stimuli). Posttest performance by all participants indicated the emergence of equivalence relations between fractions represented as ratios, decimals, and pictures. Limited generalization of fraction-decimal relations was observed.     

Multiple schedules,off‐baseline reinforcement shifts,and resistance to extinction

Resistance to extinction in a target multiple‐schedule component varies inversely with the rate of reinforcement arranged in an alternative component during baseline. The present experiment asked whether changing the reinforcer rate in an alternative component would impact extinction of target component responding if those changes occurred in an off‐baseline phase during which the target component was never experienced. Pigeons' key pecking was studied in three types of conditions, and each condition consisted of three phases. In Phase 1, pecking produced food in the target and alternative components of a multiple schedule according to variable‐interval 60‐s schedules. In Phase 2, the alternative‐component stimulus was presented alone in a single schedule. Pecking during this phase produced the same reinforcer rate as in baseline in the Control condition, a higher rate of food (variable‐interval 15 s) in the High‐Rate condition, or was extinguished in the Extinction condition. Extinction of target‐ and alternative‐component key pecking then was assessed in a multiple schedule during the final phase of each condition. Resistance to extinction of target‐component key pecking was the same between the Control and High‐Rate conditions but lower in the Extinction condition. These findings are discussed in terms of discrimination and generalization processes.     

The effects of categorical similarity and feature-space proximity on visual working memory processing

Two patterns of data predict that similarity has a positive effect and a negative effect on visual working memory (VWM) processing. We assume that these two empirical outcomes do not distinguish categorical similarity from feature-space proximity, resulting in this divergence. To investigate how categorical similarity and feature-space proximity modulate VWM, we tested memory for an array of pictures drawn from either mixed categories or a single category in which feature-space proximity varied along a morph continuum in a change-detection task. We found that memory under the mixed-category condition was better than that under the single-category condition, whereas memory under high feature-space proximity was superior to that under low feature-space proximity. These patterns were unaffected by manipulations of stimulus type (faces or scenes), encoding duration (limited or self-paced), and presentation format (simultaneous or sequential). These results are consistent with our hypotheses that categorical similarity inhibits VWM, whereas feature-space proximity facilitates VWM. We also found that memory for items with low feature-space proximity benefited more from mixed-category encoding than that for items with high feature-space proximity. Memory for faces benefited more from mixed-category encoding than scenes, whereas memory for scenes benefited more from feature-space proximity than faces. These results suggest that centre-surround inhibition organization might underlie similarity effects in VWM. Centre-surround inhibition organization for complex real-world objects could have both categorical level and feature-space level. The feature-space level might differ by category.     

Prevalence of renewal of problem behavior: Replication and extension to an inpatient setting

Individuals with intellectual and developmental disabilities who exhibit problem behavior often receive behavioral assessment and treatment in specialized inpatient and outpatient clinics. However, problem behavior sometimes reemerges as a function of changes in contexts and stimulus conditions, such as returning to the home environment. This reemergence is called renewal. Recently, Muething et al. (2020) found that renewal occurred in over half (67%) of cases from an outpatient clinic. Their sample was obtained exclusively from an outpatient setting and despite the applied relevance of renewal, its clinical prevalence in other populations is unknown. Accordingly, we replicated Muething et al.’s procedures and analyzed renewal in 37 inpatient treatment applications across 34 cases via consecutive‐controlled case series. Renewal was present in 59% of cases; however, we found that renewal occurred in only 24% of context changes compared to 42% reported by Muething et al. Various factors related to the prevalence of renewal were evaluated.     

The influence of correlations between noncritical features and reinforcement on stimulus generalization

One strategy to program for generalization is to vary noncritical features in teaching exemplars, thereby avoiding noncritical features from being highly correlated with reinforcement and thus gaining faulty stimulus control. In the current translational evaluation, 2 groups of adults of typical development were taught to respond to arbitrary stimuli with experimenter‐defined critical and noncritical features in a matching‐to‐sample task. The teaching arrangement used for 1 group programmed for low correlation between noncritical features and reinforcement; the teaching arrangement used for the other group programmed for high correlation between noncritical features and reinforcement. Participants in the former group displayed (a) faster acquisition of matching, (b) less variability in correct responding, and (c) a decreased likelihood of faulty stimulus control developing during training. The results contribute towards advancing the study of stimulus control and developing an explicit technology of generalization to better serve consumers of the application of our science.     

传言对人际信任影响的泛化效应

本研究使用学习-测试范式考察传言对人际信任影响的泛化效应。学习阶段,被试对中性面孔和不同效价的传言或真实信息进行配对学习;测试阶段,被试作为投资者与陌生对家完成信任投资游戏,对家面孔与学习面孔具有40%相似性。结果发现,传言能够影响学习面孔的信任,并调节与学习面孔相似的对家面孔的信任投资;同时,传言对信任投资的影响只发生在女性对家身上。上述发现揭示传言对人际信任能够进行选择性泛化。     

Being there on time: Reinforcer effects on timing and locating

In research on timing, reinforcers often are assumed to influence discrimination of elapsed time. We asked whether changes in choice used to measure timing arise because of joint control by elapsed time and reinforcers, rather than from the direct modification of control by elapsed time by reinforcers. Pigeons worked on a concurrent-choice task in which 1 response was 9 times more likely to produce a reinforcer, reversing between locations when 19 s had elapsed since the marker event. Across conditions, we manipulated the percentage of reinforcers arranged before the probability reversal from 5 to 95%. These changes in reinforcer percentages altered control by location-based elements of the contingency, but not by time-based elements. Choice was well described by a model that assumes that control by the contingency is weakened by generalization across the time and location of reinforcers, and that these generalizations become more likely at later times since a marker. These findings add to a growing body of research that suggests that reinforcers share the same function as other environmental events in determining how the environment controls behavior.     

Is the Self other to the self? Why does the numinosum feel like another? The relevance of Matte Blanco to our understanding of the unconscious

Using Ignacio Matte Blanco’s approach to the unconscious, this paper attempts to explain why the experience of the Self or the unconscious, for example in dreams, is difficult for the ego to understand. Matte Blanco believes that the logic of the unconscious is radically different from the logic of consciousness. The unconscious uses processes that Matte Blanco refers to as symmetry and generalization. Symmetry means that the converse of any relationship is identical to it, so that asymmetrical relationships are treated as if they were symmetrical. Generalization means that the unconscious treats any object as belonging to a larger class of objects that is a subset of an even larger class which is in turn a subset of a wider class ad infinitum. Hence Matte Blanco’s idea of the unconscious as infinite sets. These unconscious mechanisms, combined with the possibility that the unconscious has more dimensions than consciousness, contribute to the difficulty of understanding dreams, and help to explain why the Self is experienced as other to the ego.     

On an Intuitionistic Modal Logic

In this paper we consider an intuitionistic variant of the modal logic S4 (which we call IS4). The novelty of this paper is that we place particular importance on the natural deduction formulation of IS4— our formulation has several important metatheoretic properties. In addition, we study models of IS4— not in the framework of Kirpke semantics, but in the more general framework of category theory. This allows not only a more abstract definition of a whole class of models but also a means of modelling proofs as well as provability.     

仿真场景下类别空间关系判断中的注意分配

研究采用“提示-目标”的范式,并结合单、双任务的方法探讨仿真场景下类别空间关系判断中的空间注意分配。结果发现：提示影响类别空间关系判断效率,不同类型提示对类别空间关系判断的影响不同;类别空间关系判断还受到任务类型和判断类型的影响。由此得出以下结论：提示有助于注意资源的集中,提示越有效注意资源分配效率越高;注意分配受到第二任务要求的影响;决定注意分配策略的认知判断过程可能是持续存在的