Evaluating different values of effort and reinforcement parameters under concurrent‐ and single‐operant arrangements

If particular parameters (e.g., reinforcer quality) are found to be preferred in a concurrent‐operant arrangement, then these should be incorporated into interventions for maintaining skills in individuals with intellectual disabilities. However, because results from a concurrent‐operant arrangement may not predict those of a single‐operant assessment, interventions with less preferred parameters may also be effective. The purpose of this study was to determine if preference for a particular parameter, determined via concurrent‐operant arrangements, predicted responding when two values of highly and less preferred parameters were manipulated in a single‐operant arrangement. Participants allocated responding to one parameter over another during concurrent‐operant assessments, indicating that certain parameters were highly preferred. However, contingent presentation of two values of less preferred parameters increased compliance to similar levels achieved with two highly preferred parameters in a single‐operant arrangement. These findings suggest that clinicians may have multiple options when selecting parameters for use during intervention.     

Gesturing towards the future: cognition,big data,and the future of comparative gesture research

Animal Cognition - The field of ape gesture research has grown significantly in the past two decades, but progress on the question of gesture development has been limited by methodological and...     

Delaying execution of intentions: overcoming the costs of interruptions

In real-world settings, execution of retrieved intentions must often be briefly delayed until an ongoing activity is completed (delayed-execute prospective memory tasks). Further, in demanding work settings, the ongoing activity itself can be interrupted. Experiment 1 examined the effects of the delay length (5, 15, 40 s), the presence of an interruption within that delay, and the length of the interruption on prospective memory performance. Delay length did not significantly affect performance, but interruptions produced significant decrements in performance relative to a delay alone. The length of the interruptions (10 vs. 20 s) did not significantly affect performance. Experiment 2 replicated the negative effects of interruptions, and found that these effects could be overcome with a simple external mnemonic. We suggest that in demanding work environments where interruptions are likely, external cues are advisable, especially where prospective memory failures have critical consequences. Copyright © 2004 John Wiley & Sons, Ltd.     

Natural conversations as a source of false memories in children: Implications for the testimony of young witnesses

Research on factors that can affect the accuracy of children’s autobiographical remembering has important implications for understanding the abilities of young witnesses to provide legal testimony. In this article, we review our own recent research on one factor that has much potential to induce errors in children’s event recall, namely natural memory sharing conversations with peers and parents. Our studies provide compelling evidence that not only can the content of conversations about the past intrude into later memory but that such exchanges can prompt the generation of entirely false narratives that are more detailed than true accounts of experienced events. Further, our work show that deeper and more creative participation in memory sharing dialogues can boost the damaging effects of conversationally conveyed misinformation. Implications of this collection of findings for children’s testimony are discussed.