Development and Practice of the Systems Paradigm in Argentina, Chile and Peru

The systems paradigm has been developing in the southern region of South America for more than three decades, albeit at different paces and with a variety of achievements as can be expected when describing the process of countries as diverse as Argentina, Chile and Peru. This article describes the circumstances and actions that have enabled the systemic approach to gain a legitimate place in the local psychotherapy field permeating family, marital/couple, and individual therapy. Moreover, the family/contextual perspective has attained a valued respectability in the family legal system as well as in community interventions. Overall, the community is aware of and at ease with this efficacious contextual approach. As in other parts of the world, the universities have joined the private entities in the training endeavor and the accreditation process is a complex goal with obstacles that have not yet been surmounted.     

Learning in High-Tech and Multimedia Environments

ABSTRACT— When do high-tech environments promote learning? The goal of this article is to offer one answer to this question by examining the classic distinction between media and method, in terms of their roles in promoting learning with technology. To this end, I first propose a cognitive theory of learning with media, from which a set of instructional design principles are derived. Then I review research in which the relative learning contributions of method and media are investigated, and I offer final reflections for future research.     

Expectancies generated by recent exposure to melodic sequences

In four experiments, we examined the effects of exposure to unfamiliar tone sequences on melodic expectancy and memory. In Experiment 1, 30 unfamiliar tone sequences (target sequences) were presented to listeners three times each in random order (exposure phase), and listeners recorded the number of notes in each sequence. Listeners were then presented target and novel sequences and rated how well the final note continued the pattern of notes that preceded it. Novel sequences were identical to target sequences, except for the final note. Ratings were significantly higher for target sequences than for novel sequences, illustrating the influence of exposure on melodic expectancy. Experiment 2 confirmed that without exposure to target sequences, ratings were equivalent for target and novel sequences. In Experiment 3, new listeners were assessed for explicit memory for target sequences following the exposure phase. Recognition of target sequences was above chance, but unrelated to expectancy judgments in Experiment 1. Experiment 4 replicated the exposure effect, using a modified experiment design, and confirmed that the effect is not dependent on explicit memory for sequences. We discuss the idea that melodic expectancies are influenced by implicit memory for recently heard melodic patterns.     

Interference effects in the picture-word stroop task

Line drawings of common objects with an embedded three-or four-letter word or scrambled word were presented either to the right or left visual field. Subjects were to name the line drawing of a common object as fast and as accurately as possible. Reaction times and response accuracy were recorded and analyzed. Percent errors were significantly higher when a line drawing with a word was presented in the right visual field than in the left visual field. Sex of subject was not significant. This finding is analogous to results found when the color-word Stroop task is used.     

Differences between elite,junior and non-rowers in kinematic and kinetic parameters during ergometer rowing

This paper presents an analysis of the rowing parameters of differently skilled rowers. The study focuses on technique dependency on stroke rate. Five elite, five junior and five non-rowers participated, and the biomechanics of rowing on an ergometer was analyzed at stroke rates of 20, 26 and 34 str/min. The results show that elite rowers use a similar, consistent rowing technique at all stroke rates, the technique of junior rowers follows similar principles, while the technique of non-rowers varies. Elite rowers’ stroke length, handle motion and body posture do not change with stroke rate while the ratio of stroke phases, maximum forces, stroke work and joint loadings are constant at the same stroke rate but dependent on stroke rate. Junior rowers with stroke rate change also the stroke length. In non-rowers the differences can be observed in the handle motion and body posture during the stroke, their stroke length changes with stroke rate while the ratio of stroke phases stays constant. Although different movement execution is evident and variable with stroke rate, non-rowers demonstrate a consistent pattern at the same stroke rate. On the basis of the results, the crucial parameters that differentiate elite, junior, and non-rowers are identified.     

DEVELOPMENTAL CHANGE IN COGNITIVE ORGANIZATION UNDERLYING STROOP TASKS OF JAPANESE ORTHOGRAPHIES

Cognitive processes underlying Stroop interference tasks of two Japanese orthographies, hiragana (a phonetic orthography) and kanji (a logographic orthography) were studied from the developmental point of view. Four age groups (first, second, third graders, and university students) were employed as subjects. Significant interference was yielded both in the hiragana and in the kanji version. Performance time on interference task decreased with age. For elementary school children, the error frequency on the interference task was higher than that on the task of naming patch colors or on the task of reading words printed in black ink, but the error frequencies did not differ among tasks for university students. In the interference task more word reading errors were yielded in the kanji version than in the hiragana version during and after third grade. The findings suggested that (1) the recognition system of hiragana and of kanji becomes qualitatively different during and after third grade, (2) the integrative system, which organizes cognitive processes underlying Stroop task, develops with age, and (3) efficiency of the organization increases with age.     

Color preference and food choice among children

The effects of color on children's food choices were investigated. Subjects were 120 children who were equally distributed among each of the combinations of age (5 vs. 9 years old), sex (male vs. female), food type (3 types of candies), and color (red, green, yellow, and orange) in a counterbalanced, factorial, analysis-of-variance design with repeated measures on subjects. A significant main effect for color indicated that children preferred foods that were red, green, orange, and yellow, in that order. Interpretation of this main effect was not interfered with by main effects or interaction terms involving age, sex, or food type, which served as alternative rival hypotheses.     

Multiple Mediators of the Effects of Acculturation Status on Delinquency for Mexican American Adolescents

Research has shown that more acculturated Latino adolescents are at increased risk for delinquent behavior relative to their less acculturated counterparts. The present study examined the mediating effects of seven variables hypothesized to account for the empirical link between acculturation status and delinquent activity for a sample of Mexican American adolescents. Mediational analyses provided support for four of the putative mediators which included family conflict, maternal monitoring, inconsistent discipline, and negative peer hassles. Examined together, these variables totally mediated the effect of acculturation status on delinquent behavior. In addition, family conflict and maternal monitoring uniquely accounted for a significant proportion of the mediated variance above that explained by the other variables in the model. Adolescent's cultural identity, perceived discrimination, and maternal acceptance were not supported as mediators.     

Minimizing cost in resource-allocation decisions

Decisions about resource-allocation are faced by us daily, but only recently has published research explored how people make resource-allocation decisions. Previous studies examined resource-allocation tasks where the goal was to maximize payoff with limited resources. In the present study, we extended the literature by examining resource-allocation problems where the goal was to achieve a fixed objective while minimizing the consumption of resources. We asked participants to minimize cost by scheduling two aircraft with differing personnel and fuel requirements under conditions of certainty, risk, and uncertainty. Results indicated that participants could solve such problems surprisingly well, performing best under certainty and worst under uncertainty.     

Effects of fear and anger on perceived risks of terrorism: a national field experiment

The aftermath of September 11th highlights the need to understand how emotion affects citizens' responses to risk. It also provides an opportunity to test current theories of such effects. On the basis of appraisal-tendency theory, we predicted opposite effects for anger and fear on risk judgments and policy preferences. In a nationally representative sample of Americans (N = 973, ages 13–88), fear increased risk estimates and plans for precautionary measures; anger did the opposite. These patterns emerged with both experimentally induced emotions and naturally occurring ones. Males had less pessimistic risk estimates than did females, emotion differences explaining 60 to 80% of the gender difference. Emotions also predicted diverging public policy preferences. Discussion focuses on theoretical, methodological, and policy implications.