Continuous visual cues trigger automatic spatial target updating in dynamic scenes

Dynamic tasks often require fast adaptations to new viewpoints. It has been shown that automatic spatial updating is triggered by proprioceptive motion cues. Here, we demonstrate that purely visual cues are sufficient to trigger automatic updating. In five experiments, we examined spatial updating in a dynamic attention task in which participants had to track three objects across scene rotations that occurred while the objects were temporarily invisible. The objects moved on a floor plane acting as a reference frame and unpredictably either were relocated when reference frame rotations occurred or remained in place. Although participants were aware of this dissociation they were unable to ignore continuous visual cues about scene rotations (Experiments 1a and 1b). This even held when common rotations of floor plane and objects were less likely than a dissociated rotation (Experiments 2a and 2b). However, identifying only the spatial reference direction was not sufficient to trigger updating (Experiment 3). Thus we conclude that automatic spatial target updating occurs with pure visual information.     

Some effects of response-independent reinforcement on auditory generalization gradients.

Two groups of six rats received discrimination training with two auditory stimuli differing in intensity. During one stimulus, the schedule was variable interval; during the other, it was either variable time or extinction. Both the variable time and extinction schedules resulted in differential rates of responding in the presence of the two stimuli. Extinction resulted in an earlier and more stable difference. Stimulus generalization gradients obtained along the noise-intensity dimension revealed peak shift with both procedures. In addition, a secondary peak to stimuli in between the two training stimuli occurred with the variable-time schedule.     

High-Performing Inner-City Adolescents Assist Low-Performing Peers in Counseling Groups

Operating from the theoretical base that the adolescent social system and group procedures could be incorporated into strategies for improving the school performance of disadvantaged students, a supervised program of peer leadership in counseling and study groups was developed for a group of inner-city high school students. A method of training students to be peer leaders in the groups was developed, and the effects of the program on the academic performance of the selected students were evaluated. In the demonstration program, the example of achieving peers and the support and reinforcement of a group with similar goals provided the impetus for inner-city high school juniors to develop better classroom skills, higher grades, and higher levels of vocational and educational aspirations and expectations.     

Sex Bias in Educational Software: The Effect of Designers' Stereotypes on the Software They Design1

Why is the computer more alluring to boys than it is to girls? One answer to this question is drawn from a social psychological model of human interaction. Social psychological research indicates that the expectations an individual has about another person can shape his or her interaction with that person. We hypothesized that, in a similar manner, the expectations software designers hold about the users of the software they design are central in determining the way the software they design interacts with the user. In order to test this notion, we had 43 educators with programming experience design software for either boys, girls, or students, and found that programs for girls were classifiable as “learning tools,” whereas programs for both boys and students were most like “games.” These differences occur as a function of the designers' expectations of the characteristics of potential users of the program and result in sex stereotyped software. We conclude that it is not the computer, or even the software, that is at the root of the sex bias in software, but the expectations and stereotypes of the designers of the software.     

Some problems and issues in the implementation of mental health programs in the public schools

New roles are possible for school psychologists because of mental health needs engendered by today's problems in educational settings. There is a great urgency for school psychologists to seek larger scale kinds of solutions than have typified the more frequently practiced therapeutic efforts of school psychologists in the past. Mental health programs that are more suitably adapted to the life styles of low-income and minority groups is a high priority requisite for such work to be successful in today's schools.     

Context pre-exposure obscures amygdala modulation of contextual-fear conditioning

We report that post-training inactivation of basolateral amygdala region (BLA) with muscimol impaired memory for contextual-fear conditioning (as measured by freezing) and intra-BLA norepinephrine enhanced this memory. However, pre-exposure to the context eliminated both of these effects. These findings provide a likely explanation of why an earler study failed to observe that the BLA modulates contextual fear conditioning-they pre-exposed their rats to the context. These results also suggest that the amygdala modulates the storage of the context fear memory and may do so by influencing the storage of the representation of the context in which the shock occurred.     

Source, recency, and degree of stress in adolescence and suicide ideation

This study sought to identify factors related to stress that predict suicide ideation among adolescents. The sample consisted of 425 students aged 14 to 18 years. Multiple regression analysis revealed that recency and degree of stress were significant in the prediction of degree and recency of suicide ideation. The implications of these and other findings for prevention and intervention (e.g., health education, parent workshops, and adolescent support groups) are discussed.