Why rare targets are slow: Evidence that the target probability effect has an attentional locus

Target probability has a well-known effect on detection times: Targets that occur with lower probability are detected more slowly than their higher-probability counterparts. A long-standing issue of interest is what causes this effect. In the two experiments of this study, we examined the possibility that the target probability effect has an attentional locus. We report two key findings that are consistent with this hypothesis. First, we observed a magnification of the effect when the attentional resources available for target detection were limited. Second, we also observed the complementary pattern: an attenuation of the effect when more attentional resources were available for detection. We propose that the target probability effect is caused by an asymmetry in the attentional demands made by targets that occur with different probabilities, with low-probability targets being more attentionally demanding than high-probability ones.     

Manual discrimination of force using active finger motion.

In these experiments, two plates were grasped between the thumb and forefinger and squeezed together along a linear track. An electromechanical system presented a constant resistance force during the squeeze up to a predetermined location on the track, whereupon the force effectively went to infinity (simulating a wall) or to zero (simulating a cliff). The task of the subject was to discriminate between two alternative levels of the constant resistance force (a reference level and a reference-plus-increment level). Results of these experiments indicate a just noticeable difference of roughly 7% of the reference force using a one-interval paradigm with trial-by-trial feedback over the ranges 2.5 less than or equal to F0 less than or equal to 10.0 newtons, 5 less than or equal to D less than or equal to 30 mm, 45 less than or equal to S less than or equal to 125 mm, and 25 less than or equal to V less than or equal to 160 mm/sec, where F0 is the reference force, D is the distance squeezed, S is the initial fingerspan, and V is the mean velocity of the squeeze. These results, based on tests with 5 subjects, are consistent with a wide range of previous results, some of which are associated with other body surfaces and muscle systems and many of which were obtained with different psychophysical methods.     

中学生心理健康量表编制研究

本文阐述了正常人心理健康的内涵,提出以认知正常、情感协调、意志健全、个性完整和适应良好等五个心理健康维度来衡量中学生的心理健康水平。采用自陈量表编制原理和问卷调查分析法,编制了具有较高效度和信度的中学生心理健康量表,并随机抽取有代表性的中学生样本（ｎ＝１２４８）,制定了上海常模。对开展中学生心理健康与素质教育具有理论和实践上的指导意义。     

Commentary on reviews of “outcome” studies of family and marital psychotherapy

Reviews of the outcome literature in family and marital therapy are critically evaluated. The literature is equivocal in regard to the effectiveness of family therapy, particularly in comparison to alternative forms of treatment, so that statements to the effect that family therapy has demonstrated its general efficacy would not appear to be justified. Problems are identified which require solution before the efficacy of family therapy can be demonstrated.Paper presented at the 45th annual conference of the American Association for Marriage and Family Therapy, Chicago, Illinois, October 31, 1987.     

A recency-based account of the primacy effect in free recall

Seven experiments investigated the role of rehearsal in free recall to determine whether accounts of recency effects based on the ratio rule could be extended to provide an account of primacy effects based on the number, distribution, and recency of the rehearsals of the study items. Primacy items were rehearsed more often and further toward the end of the list than middle items, particularly with a slow presentation rate (Experiment 1) and with high-frequency words (Experiment 2). Recency, but not primacy, was reduced by a filled delay (Experiment 3), although significant recency survived a filled retention interval when a fixed-rehearsal strategy was used (Experiment 4). Experimenter-presented schedules of rehearsals resulted in similar serial position curves to those observed with participant-generated rehearsals (Experiment 5) and were used to confirm the main findings in Experiments 6 and 7.     

Effects of the medical resonance therapy music® on haemodynamic parameter in children with autonomic nervous system disturbances

The present investigation is dedicated to the effects of the Medical Resonance Therapy Music^® (MRT-Music) on basic haemodynamic parameter in children with transient arterial hypertension due to disturbances of the autonomic nervous system with different degrees of initial sympatheticotonia. After the nuclear accident at Chernobyl many children developed blood pressure too high for their age norm. Having already observed a decrease in high blood pressure in pregnant women during Medical Resonance Therapy Music (Gerasimovich, Einysh, 1999; Gerasimovich, Sidorenko, 1995; Sidorenko, Tetiorkina, Korotkov, 1997) we studied the effects of the Medical Resonance Therapy Music^® (MRT-Music) on such children—with very positive results: the treatment with the music preparations demonstrated a clear sympatholythic effect and led the disturbed haemodynamic state back to its healthy age norm.     

中学生的班级环境、学业自我与学业求助的关系

为考察中学生的班级环境、学业自我和学业求助三者之间的关系,采用问卷法对415名初高中生进行了调查研究,结果发现:1)知觉到的班级环境为团结向上型的学生在学习中易倾向为工具性求助而较少执行性和回避性求助;2)中学生在学业自我总分上得分越高,他们越倾向于工具性求助而较少执行性和回避性求助;3)中学生对班级环境的知觉会影响其学业自我发展,同时班级环境中的师生关系会通过学业自我影响其学业求助行为。