Acute aerobic exercise improves memory across intensity and fitness levels

ABSTRACT

The present study was designed to examine the impact of exercise intensity and aerobic fitness on free recall, judgments of learning (JOLs), and metacognitive accuracy. In Experiment 1, 30 college students engaged in either (1) no exercise, (2) light exercise (55% of predicted maximal heart rate), or (3) moderate exercise (75% of predicted maximal heart rate) on three different days. In Experiment 2, 29 high-fit students (VO₂ max?≥?70th percentile) and 28 low-fit students (VO₂ max?≤?50th percentile) completed sedentary and light exercise conditions. In both experiments, free recall scores significantly increased in the exercise conditions compared with the sedentary condition, but JOL magnitude and metacognitive accuracy were largely unaffected. These results demonstrate that exercise can improve recall at both light and high intensities, and that the benefit can be obtained by individuals regardless of their fitness level.     

Mood-dependent retrieval and mood awareness

Abstract

In six experiments, subjects were induced into happy or sad moods prior to studying a list of words, and then induced into either the same or different mood prior to freely recalling the list. In addition, subjects were administered various individual difference measures of mood states. The hypothesis was that subjects who profess to be most aware of their moods would be most likely to show disrupted performance when study and test moods were different. Mood-dependent performance was not generally observed, nor was there any evidence that it more consistently emerged for high-aware subjects.     

When autocratic leaders become an option--uncertainty and self-esteem predict implicit leadership preferences

We investigated the impact of uncertainty on leadership preferences and propose that the conjunction of self-esteem level and stability is an important moderator in this regard. Self-threatening uncertainty is aversive and activates the motivation to regain control. People with high and stable self-esteem should be confident of achieving this goal by self-determined amelioration of the situation and should therefore show a stronger preference for democratic leadership under conditions of uncertainty. By contrast, people with low and unstable self-esteem should place their trust and hope in the abilities of powerful others, resulting in a preference for autocratic leadership. Studies 1a and 1b validate explicit and implicit leadership measures and demonstrate a general prodemocratic default attitude under conditions of certainty. Studies 2 and 3 reveal a democratic reaction for individuals with stable high self-esteem and a submissive reaction for individuals with unstable low self-esteem under conditions of uncertainty. In Study 4, this pattern is cancelled out when individuals evaluate leadership styles from a leader instead of a follower perspective.     

What happened to the Canada-United States brain drain of the 1990s? New evidence from the 2000 US census

This article uses the 2000 US Census to ascertain both quantitative and qualitative changes in Canadian immigrants to the United States through, the 1990s, and compares these to earlier migration cohorts from census data in 1980 and 1990. Canadians in the United States continue to have higher relative salaries and education levels vis-à-vis their American counterparts and this gap has widened in the 1990s, even when controlling for variety of labour market factors. A similar phenomenon occurred amongst immigrants from Britain and Ireland and suggests that US economic performance and immigration policy are the probable driving, force behind this migration.     

Attributional Complexity: A Link Between Training, Job Complexity, Decision Latitude, Leader–Member Exchange, and Performance

Previous research demonstrated that individuals differ in the relative sophistication of their schemas for organizing and interpreting social stimuli (i.e., attributional complexity, or AC) and that AC has been linked to performance in social situations. In the present study, 420 employed students completed surveys for an investigation of the relationship between individual, work role, and job characteristics; AC; and job performance. Educational level and major predicted AC, but leader–member exchange (LMX), decision latitude (DL), and social/task complexity of the job did not. Contrary to expectations, social and task complexity did not interact with DL and LMX to predict AC. AC, DL, LMX, and educational level predicted job performance. Further, AC interacted with social complexity of the job to predict performance. The results suggest that AC may be both content and process based, and predictive of performance in certain jobs.     

Gender Differences in Anticipated Salary: Role of Salary Estimates for Others,Job Characteristics,Career Paths,and Job Inputs

The purpose of this research was to compare pay expectations of women and men. Participants were 371 college students (261 women, 110 men; 94% White) from a variety of majors. Most students at this university are middle class. Consistent with prior research, women estimated significantly lower salaries at career entry and peak and rated family considerations and pleasant working conditions as significantly more important than did men. Men and women differed on salary estimates for others, influence of salary on decision to enter a field, time off for childrearing, career certainty, and weekly work hours. Controlling for average salaries in the listed job, job characteristic importance, career path, and job input differences eliminated the gender differences at entry and reduced the difference at peak.     

Empowering Change Agents: Youth Organizing Groups as Sites for Sociopolitical Development

In addition to social action campaigns, some youth organizing groups provide formative learning experiences which engage youth in relevant sociopolitical issues through critical approaches. These groups support sociopolitical development (SPD), a self and socially‐oriented process which influences youth personally, politically, and professionally into adulthood. This study explored how youth organizing experiences influenced SPD in the professional domain, applying an empowerment lens. Phenomenologically‐based interviews were conducted with former sexual health education youth organizers and adult program staff. Former youth participants chose socially‐oriented career paths influenced by the group's empowering approach to sexual health education and advocacy. They related meaningful sociopolitical learning experiences (e.g., interpersonal, educational, and civic engagement) to empowerment outcomes (e.g., political efficacy, critical awareness, and participatory behaviors) which informed career decisions. Professionally, participants sought to empower others as the group empowered them, drawing upon youth organizing social and human capital as they worked toward this aim. Combining sociopolitical and empowerment theorizing, the study adds to what is known about how purposefully designed youth organizing experiences support long‐term development outcomes for individuals. Viewed as socially‐oriented career development sites, youth organizing groups build capacity for social change beyond the groups themselves. Implications for youth organizing scholars and practitioners are provided.     

Creating political websites: Balancing complexity &; usability

By integrating what is known about how people navigate the overwhelming tide of political information with research on usability, the experiments reported in this article aim to provide information about how to create political websites that are usable, engaging, and educational. This article reports on a series of four different experiments (n=478) comparing a simpler and more easily navigable website to a more complex and interactive website. The types of websites tested include: adwatches, issue grids, candidate biographies, and campaign finance sites. The results suggest that simpler, more navigable websites are preferred to more interactive websites with web tools. Results also suggest that more political information is not always preferable, as in most cases, participants rated sites with more political information lower. Brett A. Mueller received a master’s degree from the Annenberg School for Communication in 2002. This research is supported by a grant from The Pew Charitable Trusts; Dr. Kathleen Hall Jamieson, Primary Investigator. The authors than Joyce Garczynski, Jon Stromer-Galley, Svjetlana Tepavcevic, and Dannagal Goldthwaite Young for their work on the project.     

Increasing variety of foods consumed by blending nonpreferred foods into preferred foods

A treatment with differential or noncontingent reinforcement and nonremoval of the spoon increased the acceptance of one or two of 16 foods for 2 participants with severe food refusal. These differential levels of acceptance were demonstrated empirically in an ABAB design in which A was the presentation of the accepted (preferred) foods and B was the presentation of foods the participants refused (nonpreferred foods). Subsequently, we implemented a blending treatment that consisted of mixing (blending) nonpreferred foods into preferred foods in various ratios (e.g., 10% nonpreferred/90% preferred, 20% nonpreferred/80% preferred). We then presented nonpreferred foods that had been exposed to blending to determine if consumption of nonpreferred foods would increase following the blending treatment. We also conducted periodic reversals in which we presented nonpreferred foods that had not been exposed to the blending treatment. Following initial implementation of the blending treatment, consumption was high for nonpreferred foods that had been blended and low for nonpreferred foods that had not been blended. Consumption increased for all foods (i.e., foods that had been exposed to blending and foods that had not been exposed to blending) after seven or eight foods had been exposed to the blending treatment. Thus, the variety of foods consumed by the participants increased from one or two to 16. These results are discussed in terms of stimulus fading, conditioned food preferences, and escape extinction. DESCRIPTORS: conditioned food preferences, food refusal, negative reinforcement, stimulus fading