Using MEL in a networked classroom

With Micro Experimental Laboratory (MEL) and network software in a computer-assisted classroom, an instructor can run class demonstrations and projects with great control and flexibility. The network allows quick file transfer between the instructor’s and the students’ machines. MEL allows easy reprogramming of experiments for more interactive demonstrations, and data merging for comparison of individual and group data. In this article, the pros and cons of running MEL on a network are discussed, and its use at the University of California at Berkeley is outlined.     

Old Age,Finitude and Meaning: Reflections on the Care of Older Adults Based on Logotherapy

Due to the steady increase in the number of older adults among the Brazilian population, the aim of the present article is to reflect on the care provided to the elderly based on Viktor Frankl’s logotherapy as an alternative approach to understanding more deeply what this life stage means. For this purpose, demographic data on the population of older adults are provided, together with distinct views on aging and its relationship to the quality of life. Next, logotherapy, from its conceptions about the relationship of the person to finitude and to the person’s possibilities for existence, is presented as a psychological theory likely to improve the understanding of aging and to represent a possible approach to the care of older adults. Based on an understanding of humans as beings of power and therefore as self-transcendent and endowed with the will to meaning, the possibility of psychology investing in the relationship with alterity as the grounds for interventions targeting older adults is emphasized.     

Bidirectional priming in infants

In associative priming, the direct activation of one concept indirectly activates others that are associated with it, depending on the directionality of the association. We asked whether associative priming in preverbal infants is bidirectional. Infants associated a puppet imitation task with an operant train task by watching an adult model target actions on the puppet in the incidental context of the train. Later, priming of the forgotten memory of the train task reactivated the infants' memory of the puppet task (Experiment 1), and priming of the infants' forgotten memory of the puppet task reactivated their memory of the train task (Experiment 2). The finding that associative priming was bidirectional offers new insights into the nature of the mnemonic networks formed early in infancy. Additionally, the fact that the present association was formed rapidly and incidentally suggests that a fast mapping, general learning mechanism, like that posited to mediate word-object learning, was responsible for its encoding.     

Temporal generalization gradients following an interdimensional discrimination protocol

We investigated the effects of interdimensional discrimination training in the temporal generalization gradient. In a matching-to-sample task, pigeons learned to choose key S after a T–s houselight sample and key NS in the absence of the houselight sample. For one group of pigeons, T?=?20?s; for another, T?=?10?s. Subsequently, houselight duration was varied to obtain temporal generalization gradients. Results showed that (a) proportion S increased as houselight duration ranged from 0?s to T?s and then remained high for houselight durations longer than T; (b) the gradients were well described by negative-exponential functions; (c) these non-flat gradients were present from the beginning of testing, and; (d) the average gradients obtained with T?=?20?s and T?=?10?s overlapped when plotted in relative time. We conclude that temporal control does not require explicit discrimination training along the temporal dimension, and that temporal generalization gradients obtained with an interdimensional protocol show the scalar property of timing. We discuss how these findings challenge current models of timing.     

Negative affect as a predisposing factor for cortisol release after an acute stress--the impact of unpleasant priming

Glucocorticoids have a key role in stress responses. There are, however, substantial differences in cortisol reactivity among individuals. We investigated if affective trait and mood induction influence the reactivity to psychological stress in a group of 63 young adults, male (n=27) and female (n=36), aged ca. 21 years. On the experimental day the participants viewed either a block of pleasant or unpleasant pictures for 5 min to induce positive or negative mood, respectively. Then, they had 5 min to prepare a speech to be delivered in front of a video-camera. Saliva samples were collected to measure cortisol, and questionnaire-based affective scales were used to estimate emotional states and traits. Compared to basal levels, a cortisol response to the acute speech stressor was only seen for those who had first viewed unpleasant pictures and scored above the average on the negative affect scale. There were no sex differences. In conclusion, high negative affect associated with exposure to an unpleasant context increased sensitivity to an acute stressor, and was critical to stimulation of cortisol release by the speech stressor.     

Visual aesthetics in store environment and its moderating role on consumer intention

• The paper goal is to answer the following questions: What are the factors of centrality of visual aesthetic design (CVSA) in store environment? What factor explains better the construct? Is there a relationship between CVSA and consumers' intentions, such as loyalty, satisfaction, minutes, item, and $ spent inside store? What is the moderating role of store visual aesthetic design on consumer intentions? The research design was a 2 × 2 design, between subjects, which we manipulated store arousal (high vs. low) and CVSA (high vs. low) in two studies. The findings supported the theory that there are three CVSA dimensions; that there is a positive relationship between CVSA and consumer satisfaction, loyalty, items bought, minutes visiting the store, and $ spent; and that high (vs. low) CVSA consumers were more discriminating in their intentions, when the environment had a high arousal. The original value is to support the notion that consumers also evaluate, beyond products, visual aesthetic components in retail and that it plays a moderating role on consumer intention.

Copyright © 2010 John Wiley & Sons, Ltd.     

Constructed‐response spelling and literacy development: an application in an urban classroom

The purpose of this study was to examine the effectiveness of constructed‐response spelling procedures with disadvantaged children attending a public inner‐city elementary school. Ten students of primarily Cape Verdean descent participated in the study as part of a classroom‐wide implementation of constructed‐response procedures. A multiple‐treatment design was used to assess the effectiveness of the constructed‐response strategy versus traditional spelling instruction. The dependent variable was the percent of words spelled correctly on weekly spelling tests. Results indicated that mean spelling scores were higher during both constructed‐response conditions than during traditional instruction for 9 of the 10 students. The relationship between spelling proficiency and literacy development is discussed. Copyright © 2006 John Wiley & Sons, Ltd.     

Influence of personality on pre-menstrual syndrome in athletes

The purpose of this study was to investigate the influence of personality on Premenstrual Syndrome (PMS) in athletes. The sample included 25 Brazilian athletes, between 18 and 49 years of age. A diary of PMS symptoms was used (based on the criteria from the American College of Obstetricians and Gynecologist, ACOG, 2000) and the Factorial Personality Inventory (Pasquali, Azevedo, & Ghesti, 1997). The Fisher exact test was used for data analysis, with p < .05. The athletes with PMS showed a strong need for performance, low need for assistance and introversión and very low need for change, while athletes without PMS demonstrated a very strong need for denial and strong needs for assistance, dominance, and persistence. There was a significant association between low denial (not submitting passively to external forces) and PMS (p < .05). It was concluded that certain personality traits may predispose athletes to react more intensely to needs and pressures produced by changes caused by the menstrual cycle, contributing to the onset of PMS.     

How much does the human medial gastrocnemius muscle contribute to ankle torques outside the sagittal plane?

Ankle movements in the frontal plane are less prominent though not less relevant than movements in the plantar or dorsal flexion direction. Walking on uneven terrains and standing on narrow stances are examples of circumstances likely imposing marked demands on the ankle medio-lateral stabilization. Following our previous evidence associating lateral bodily sways in quiet standing to activation of the medial gastrocnemius (MG) muscle, in this study we ask: how large is the MG contribution to ankle torque in the frontal plane? By arranging stimulation electrodes in a selective configuration, current pulses were applied primarily to the MG nerve branch of ten subjects. The contribution of populations of MG motor units of progressively smaller recruitment threshold to ankle torque was evaluated by increasing the stimulation amplitude by fixed amounts. From smallest intensities (12–32 mA) leading to the firstly observable MG twitches in force-plate recordings, current pulses reached intensities (56–90 mA) below which twitches in other muscles could not be observed from the skin. Key results showed a substantial MG torque contribution tending to rotate upward the foot medial aspect (ankle inversion). Nerve stimulation further revealed a linear relationship between the peak torque of ankle plantar flexion and inversion, across participants (Pearson R > .81, p < .01). Specifically, regardless of the current intensity applied, the peak torque of ankle inversion amounted to about 13% of plantar flexion peak torque. Physiologically, these results provide experimental evidence that MG activation may contribute to stabilize the body in the frontal plane, especially under situations of challenged stability.