Developing a Procedure to Model the Establishment of Instructional Control

In a recent paper, we suggested that an agreed account of the referential properties of rules and instructions has yet to be developed (O’Hora & Barnes-Holmes, 2001). In order to address this fundamental issue, procedures are required that establish referential or 'specifying' properties in previously neutral stimuli. The present report summarizes the rationale for this research and outlines procedures that we are currently developing

The referential nature of rules and instructions: A response to instructions, rules, and abstraction: A misconstrued relation by Emilio Ribes-Inesta

Rules have been defined, within behavior analysis and without, as stimuli that “refer to” or “specify” contingencies or environmental events (e.g., “Hold the base firmly and turn the top to the right,” Skinner, 1969, p. 139). Ribes-Inesta 1 (2000) suggests that the approach to rules and rule-governed behavior that developed from Skinner’s (1969) work leads to conceptual confusion. Specifically, he proposes that confusion results from the lack of a distinction between rules as stimuli and rules as outcomes. Although such a distinction may be necessary, Ribes-Inesta does not address the referential or specifying nature of rules and, consequently, fails to provide useful definitions of rules as either verbal stimuli or responses. In the first part of this response, we will outline the approach to rules and instructions provided by Ribes-Inesta’s article. In the latter half, we will point out the limitations of the definitions of rules and instructions that Ribes-Inesta proposes and, more specifically, how the inadequate definitions of rules and instructions result from the failure to address the referential nature of rules as verbal stimuli or responses. Finally, we suggest that a consideration of RibesInesta’s article draws attention to reference as a critical property of rules and rulegoverned behavior. Ribes-Inesta’s Proposed Redefinition of Rules and Instructions Ribes-Inesta suggests that the approach to rules suggested by Skinner is not clear. More specifically, he points out that a distinction must be made between “rules” that are “constructed as verbal stimuli that describe consequences” and “rules” as “instructions to be followed to cope with a set of already specified

Local Dynamics in Decision Making: The Evolution of Preference within and across Decisions

Within decisions, perceived alternatives compete until one is preferred. Across decisions, the playing field on which these alternatives compete evolves to favor certain alternatives. Mouse cursor trajectories provide rich continuous information related to such cognitive processes during decision making. In three experiments, participants learned to choose symbols to earn points in a discrimination learning paradigm and the cursor trajectories of their responses were recorded. Decisions between two choices that earned equally high-point rewards exhibited far less competition than decisions between choices that earned equally low-point rewards. Using positional coordinates in the trajectories, it was possible to infer a potential field in which the choice locations occupied areas of minimal potential. These decision spaces evolved through the experiments, as participants learned which options to choose. This visualisation approach provides a potential framework for the analysis of local dynamics in decision-making that could help mitigate both theoretical disputes and disparate empirical results.Engineering and Applied Science

Beyond reach: Do symmetric changes in motor costs affect decision making?:A registered report

Executing an important decision can be as easy as moving a mouse cursor or reaching towards the preferred option with a hand. But would we decide differently if choosing required walking a few steps towards an option? More generally, is our preference invariant to the means and motor costs of reporting it? Previous research demonstrated that asymmetric motor costs can nudge the decision-maker towards a less costly option. However, virtually all traditional decision-making theories predict that increasing motor costs symmetrically for all options should not affect choice in any way. This prediction is disputed by the theory of embodied cognition, which suggests that motor behavior is an integral part of cognitive processes, and that motor costs can affect our choices. In this registered report, we investigated whether varying motor costs can affect response dynamics and the final choices in an intertemporal choice task: choosing between a readily available small reward and a larger but delayed reward. Our study compared choices reported by moving a computer mouse cursor towards the preferred option with the choices executed via a more motor costly walking procedure. First, we investigated whether relative values of the intertemporal choice options affect walking trajectories in the same way as they affect mouse cursor dynamics. Second, we tested a hypothesis that, in the walking condition, increased motor costs of a preference reversal would decrease the number of changes-of-mind and therefore increase the proportion of impulsive, smaller-but-sooner choices. We confirmed the hypothesis that walking trajectories reflect covert dynamics of decision making, and rejected the hypothesis that increased motor costs of responding affect decisions in an intertemporal choice task. Overall, this study contributes to the empirical basis enabling the decision-making theories to address the complex interplay between cognitive and motor processes

Relational frame theory: A new paradigm for the analysis of social behavior

Recent developments in the analysis of derived relational responding, under the rubric of relational frame theory, have brought several complex language and cognitive phenomena within the empirical reach of the experimental analysis of behavior. The current paper provides an outline of relational frame theory as a new approach to the analysis of language, cognition, and complex behavior more generally. Relational frame theory, it is argued, also provides a suitable paradigm for the analysis of a wide variety of social behavior that is mediated by language. Recent empirical evidence and theoretical interpretations are provided in support of the relational frame approach to social behavior

Education, intellectual development, and relational frame theory

There is now considerable evidence to support the Relational Frame Theory (RFT) position that arbitrarily applicable relational responding or relational framing is the core behavior that characterizes human language and cognition across contexts. The capacity to frame relationally correlates with linguistic and cognitive performance more generally and specifically with measures of both intellectual ability and educational attainment. It makes sense therefore, that, by training relational framing, intellectual performance and educational attainment can be enhanced. The current chapter reviews current research in support of this exciting proposition

Comparing the effects of an acute bout of physical exercise with an acute bout of interactive mental and physical exercise on electrophysiology and executive functioning in younger and older adults

Background Physical exercise has been shown to improve cognitive and neural functioning in older adults. Aims and methods The current study compared the effects of an acute bout of physical exercise with a bout of interactive mental and physical exercise (i.e., “exergaming”) on executive (Stroop) task performance and event-related potential (ERP) amplitudes in younger and older adults. Results Results revealed enhanced executive task performance in younger and older adults after exercise, with no differences in performance between exercise conditions. Stroop (RT) performance in older adults improved more than in younger adults from pre- to post-exercise. A significant increase in EEG amplitude from pre- to post-exercise was found at the Cz site from 320 to 700 ms post-stimulus for both younger and older adults, with older adults demonstrating a larger Stroop interference effect. While younger adults exhibited overall greater EEG amplitudes than older adults, they showed no differences between congruent and incongruent trials (i.e., minimal interference). Compared to peers with higher BMI (body mass index), older adults with lower BMI showed a greater reduction in Stroop interference effects from pre- to post-exercise. Discussion and conclusions The beneficial effects of an acute bout of physical exercise on cognitive and neural functioning in younger and older adults were confirmed, with no difference between standard exercise and exergaming. Findings suggest that BMI, sometimes used as a proxy for fitness level, may modulate benefits that older adults derive from an acute bout of exercise. Findings have implications for future research that seeks to investigate unique effects of exergaming when compared to standard physical exercise

Are working memory and glutamate concentrations involved in early-life stress and severity of psychosis?

Objective Occurrences of early‐life stress (ELS) are associated with the severity of psychotic symptoms and working memory (WM) deficits in patients with psychosis (PSY). This study investigated potential mediation roles of WM behavioral performance and glutamate concentrations in prefrontal brain regions on the association between ELS and psychotic symptom severity in PSY. Method Forty‐seven patients with PSY (established schizophrenia, n = 30; bipolar disorder, n = 17) completed measures of psychotic symptom severity. In addition, data on ELS and WM performance were collected in both patients with PSY and healthy controls (HC; n = 41). Resting‐state glutamate concentrations in the bilateral dorsolateral prefrontal cortex (DLPFC) and anterior cingulate cortex (ACC) were also assessed with proton magnetic resonance spectroscopy for both PSY and HC groups. t tests, analyses of variance, and regression analyses were utilized. Results Participants with PSY reported significantly more ELS occurrences and showed poorer WM performance than HC. Furthermore, individuals with PSY displayed lower glutamate concentrations in the left DLPFC than HC. Neither ELS nor WM performance were predictive of severity of psychotic symptoms in participants with PSY. However, we found a significant negative correlation between glutamate concentrations in the left DLPFC and ELS occurrence in HC only. Conclusion In individuals with PSY, the current study found no evidence that the association between ELS and psychotic symptoms is mediated by WM performance or prefrontal glutamate concentrations. In HC, the association between ELS experience and glutamate concentrations may indicate a neurometabolite effect of ELS that is independent of an illness effect in psychosis