Prospective memory in young and older adults: The effects of ongoing-task load

ABSTRACT

Prospective memory involves remembering to perform intended actions in the future. Previous work with the multinomial model of event-based prospective memory indicated that adult age-related differences in prospective-memory performance were due to the prospective (not the retrospective) component of the task (Smith & Bayen, 2006 Smith, R. E. and Bayen, U. J. 2006. The source of age differences in event-based prospective memory: A multinomial modeling approach. Journal of Experimental Psychology: Learning, Memory, and Cognition, 32: 623–635. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar], Journal of Experimental Psychology: Learning, Memory, and Cognition, 32, 623). However, ongoing-task performance was also lower in older adults in that study. In the current study with young and older adults, the difficulty of the ongoing task was manipulated by varying the number of colors per trial to create easier and harder versions of the ongoing task for each age group. The easier version included 2 colors per trial for older adults and 4 colors for young adults. The harder version included 4 colors for older adults and 6 colors for young adults. By adjusting the ongoing-task difficulty, older adults were able to perform the ongoing task as well or better than the young adults. Analyses with the multinomial model revealed that making the ongoing task easier for older adults (or more difficult for young adults) did not eliminate age-related differences in prospective-memory performance and the underlying prospective component.     

Confronting ethical permissibility in animal research: rejecting a common assumption and extending a principle of justice

A common assumption in the selection of nonhuman animal subjects for research and the approval of research is that, if the risks of a procedure are too great for humans, and if there is a so-called scientific necessity, then it is permissible to use nonhuman animal subjects. I reject the common assumption as neglecting the central ethical issue of the permissibility of using nonhuman animal subjects and as being inconsistent with the principle of justice used in human subjects research ethics. This principle requires that certain classes of individuals not be subjected to a disproportionate share of the burdens or risks of research. I argue for an extension of this principle to nonhuman animal research and show that a prima facie violation of the principle occurs because nonhuman animals bear an overwhelmingly disproportionate share of the risks of research without sufficient justification or reciprocal benefit.     

‘Drinking is our modern way of bonding’: Young people’s beliefs about interventions to encourage moderate drinking

Efforts to discourage excessive alcohol use among young people can only be effective if the target audience is exposed to, attends to, and comprehends key messages. The aim of this study was to examine age and sex differences in drinking motives to better inform development of targeted interventions to reduce alcohol-related harm. Thirty individual interviews and 12 group interviews were conducted with English 13–25?year olds. Interviewees gave multiple motivations for drinking – especially those related to image and reputation, and played down the health implications of heavy drinking. Negative aspects of drinking – caring for drunk friends, being cared for when drunk and suffering through hangovers with friends – were considered to offer opportunities for closer interpersonal bonding than other social activities. Respondents distanced themselves from ‘problem’ drinkers, but disapproved of others’ problematic drinking or antisocial behaviour. Narrative messages demonstrating the social consequences of excessive consumption were preferred to single, static messages emphasising risk or harm. Interviewees noted that interventions must use an engaging tone or pitch: they considered many campaigns to be patronising or preaching. A lack of consensus between age and sex groups highlighted a need for multifaceted, multi-modal approaches that utilise mobile technologies and new media.     

Using mixture models with known class membership to address incomplete covariance structures in multiple‐group growth models

Multi‐group latent growth modelling in the structural equation modelling framework has been widely utilized for examining differences in growth trajectories across multiple manifest groups. Despite its usefulness, the traditional maximum likelihood estimation for multi‐group latent growth modelling is not feasible when one of the groups has no response at any given data collection point, or when all participants within a group have the same response at one of the time points. In other words, multi‐group latent growth modelling requires a complete covariance structure for each observed group. The primary purpose of the present study is to show how to circumvent these data problems by developing a simple but creative approach using an existing estimation procedure for growth mixture modelling. A Monte Carlo simulation study was carried out to see whether the modified estimation approach provided tangible results and to see how these results were comparable to the standard multi‐group results. The proposed approach produced results that were valid and reliable under the mentioned problematic data conditions. We also present a real data example and demonstrate that the proposed estimation approach can be used for the chi‐square difference test to check various types of measurement invariance as conducted in a standard multi‐group analysis.     

Conformity as a function of the consistency of positive self-evaluation with being liked and being right

Insko, Sedlak, and Lipsitz (European Journal of Social Psychology, 1982, 13, 143–167) have presented evidence that agreement effects in p?o?x triads, or semicycles, are at least partially a function of the consistency of positive self-evaluation with being liked and the consistency of positive self-evaluation with being right. Consistent with the Insko et al. balance interpretation of agreement effects, results indicated that conformity in an Asch-type experiment is a joint function of the concern with being liked and the concern with being right. The judgment stimuli were sets of three colors, and the subjects' task was to indicate whether the middle color was more like the color on the left or the color on the right. In the main experiment, subjects conformed more with public than with private responding, and also when they were led to believe that the relationships among the colors were objectively determined rather than undetermined. The first of these two results (in conjunction with the lack of an interaction and the presence of a difference between the public condition and a private camera control condition) was taken as evidence for the concern with being liked. The second finding of a difference between the determined and undetermined conditions was taken as evidence both for the concern with being right and also as indicating that conformity can occur with objective stimuli. Although concepts similar to the concerns with being right and liked have been widely discussed, a review of the literature indicated that the previously presented evidence is not totally convincing.     

Feminism and Evolutionary Psychology: Allies, Adversaries, or Both? An Introduction to a Special Issue

This special issue on feminism and evolutionary psychology addresses current theory and research from feminist and evolutionary psychologists, focusing on gender differences in mate selection as conceptualized by Sexual Strategies Theory. This introduction begins with feminist critiques of evolutionary psychology as well as attempts by Darwinian feminists to integrate the two. It then reviews the papers, which generally fit into one of three lines of research. One group of papers critiques evolutionary psychology claims and presents research to support alternative theoretical explanations. A second group uses evolutionary psychology to support research on gender differences in alignment with Sexual Strategies Theory. A third group utilizes theory and empirical research to integrate evolutionary psychology and feminist theories. The introduction concludes with a call for furthering our understanding of the relationship between these theories.     

The relative influence of conduct problems and attention-deficit hyperactivity disorder in the development of adolescent psychopathy

An in depth literature review was conducted into the relative influence of conduct problems and attention-deficit hyperactivity disorder in the development of child/adolescent psychopathy. Lynam (1996) wrote that children/adolescents exhibiting behaviors of both were ‘fledgling psychopaths;’ however, recent evidence suggests that if youth with comorbid conduct problems and ADHD exhibit a persistent form of antisocial and/or psychopathic behavior, the cause is primarily due to the levels of conduct problems, not the influence of ADHD. This article looks at the three perspectives regarding the development of psychopathy: (1) Conduct Problem Mediation, (2) the Independent Position, and (3) the Comorbid Subtype. The studies examining the three perspectives found that the Conduct Problem Mediation, not the Comorbid Subtype, was the most important in the development of psychopathy.