Hypotheses,strategies, and stereotypes in discrimination learning

In the course of two experimentss groups of kindergarten, second, fourth, sixth grade and college students received several discrimination problems. Each trial with feedback was followed by a series of blank trials, which served as a probe for S's hypothesis. Ss responded systematically during the blank trials on about 90% of the probes. Beginning at the second grade they typically showed characteristic hypothesis-testing behavior, viz., keeping confirmed hypotheses, rejecting those disconfirmed, etc.     

Psychophysical functions for active tactual discrimination of line width by blind children

Two psychophysical experiments were conducted on active tactual discrimination of line width using the method of constant stimuli with blind subjects. In Experiment I, 93 subjects made single judgments over each of five standards between 0.04 and 0.12 in. In Experiment II, 6 subjects were tested repeatedly over seven standards between 0.04 and 0.50 in. Over the range of standards common to both experiments, the Weber fractions decreased as the width of the standard increased. For two larger standards (0.25 and .50 in.), the Weber fractions approached asymptote and then increased respectively suggesting a U-shaped function. No differences in accuracy of discrimination were found between males vs. females, age groupings, or grade groupings.     

School psychology: Its educational and societal connections

School psychology can be viewed either as a pragmatic response to the pressing and immediate needs of the schools ore as an outgrowth of ideological and technological forces in society. This paper argues that beliefs more than needs shaped the history of the profession. School psychology emereged because professional educators held psychological beliefs (and because a psychological testing technology was available to turn those beliefs into practice). Thus, adherence to psychological and developmental principles made age-grading and appropriate response to the sudden influx of large numbers of new students into the schools, and the acceptance of child-centered educational theories led logically to the study of individual children's needs, especially of those who were atypical. Both educators and psychologists subscribed, at least in principle, to the mainstream social ideology of individualism. School psychology became a means for translating such national values (e.g., individualism) and educational principles (e.g., individualized instruction) into school practice.     

Sensation seeking and arousal systems

This article discusses the overgeneralized construct of ‘arousal’, pointing out some of the problems of speaking of it as mediated by a single system. The literature and current studies of the orienting and defensive reflexes, and augmenting-reducing of the cortical evoked potential in relation to the sensation-seeking (SS) trait are discussed. The data relating platelet MAO and CSF, plasma and urinary measures of bioamines, their metabolites and enzymes, to SS, extraversion and behavioral indices are also treated. Relationships between arousal measured in different systems are pointed out. Personality theory is seen as a vehicle for understanding the organization of arousal systems in adaptation to environmental stimulation.     

Developmental changes in assigning agent relations in Hebrew: The interaction between word order and structural cues

Developmental changes in the interaction between word order and structural cues was investigated by having Hebrew-speaking children between 4 and 10 years of age interpret NVN utterances that balanced the complementary and contradictory effects of work order and two types of morphological cues, inflections that mark subject-verb gender agreement and an object particle. In Hebrew, gender inflections are highly complex and irregular while the object particle is highly regular and distinctive. Both word order and structural cues affected interpretations by subjects of all age groups, though the role of structural cues increased with age. For all groups, the objec particle was a dominant cue. The likelihood of assigning the agent relation to the first or second noun systematically varied with the relative weights of cues that supported and opposed each assignment. Comparisons were made between processing of Hebrew and processing of Serbo-Croatian and Turkish.     

Effects of the temporal relationship of feedback and stimulus information upon discrimination-learning strategies

Second grade Ss and college students were tested under three conditions of the temporal relationship of feedback and stimulus information. In one condition (/+3) feedback was delivered immediately upon S's response while the stimuli were still in view. In another (/0) feedback was also immediate but stimuli were extinguished immediately upon S's response. In the third condition (/?3), stimuli were extinguished immediately upon response and feedback was delayed 3 sec. Major findings among the children were (a) Ss of all conditions coded information at the same (high) average efficiency, (b) Ss of conditions /0 and /?3 recoded with significantly less efficiency than those of /+3, and (c) Ss in condition /+3 manifested primarily efficient information-processing strategies, those in condition /0 showed intermediate performance, and those of condition /?3 showed relatively primitive stereotyped behavior. Among adult Ss performance was uniformly high with little effect on any response measure investigated.     

A Response-cost procedure for reduction of impulsive behavior of academically handicapped children

To test the hypothesis that impulsive problem-solving behavior may be due to a child's low concern about response accuracy on the Matching Familiar Figures Test, a procedure was devised which involved punishment of incorrect responses by withdrawal of tokens given before each trial. This Response-cost procedure and the Standard procedure were given in counterbalanced sequence to two groups of 15 children with a mean chronological age of 13.9 and a mean IQ of 71 who were attending special classes because of academic difficulty. Subjects showed significantly longer latency to first response under the Response-cost procedure and also made significantly fewer errors under this procedure when it was the second one administered. When the Response-cost procedure was given first, the subjects tended to carry over their relatively low error rates to the subsequent trials under the standard procedure.Appreciation is expressed to Dorothy Arnold, Frank Scott, and the participating pupils from Mary Potter School in Oxford, North Carolina. Funds for computer processing were provided by the Center for Research on Exceptional Children, School of Education, University of North Carolina at Chapel Hill. The project was supported in part by U.S. Public Health Service, Maternal and Child Health Service Project No. 916 and by Grant HD-03110 from the National Institute of Child Health and Human Development.     

A CROSS-CULTURAL STUDY OF ATTRIBUTION OF RESPONSIBILITY1

Etude interculturelle de la notion de responsabilité. — Le but de cette recherche est de comparer quel est le degré de responsabilité attribué à une personne par des enfants de trois nationalités différentes : Cuba, Porto Rico, USA. Dans chaque pays, quatre échantillons ont été constitués selon l'âge : 7–8, 9–10, 11–13 et 16–18 ans. Les enfants répondent à un questionnaire composé de 40 courtes histoires dans lesquelles on a fait varier : 1) la part prise par la personne dans la causalité des événements (5 degrés : simple association, implication directe, prévision, intention, justification); 2) la nature, bonne ou mauvaise, des conséquences; 3) l'importance, grande ou faible, des conséquences. Les résultats montrent que les degrés de causalité, la nature et l'importance des conséquences affectent grandement le niveau de responsabilité attribué, à tous les âges et dans les trois pays; on observe également des interactions significatives entre ces variables. Conformément à l'hypothèse, le degré de responsabilité attribué croît avec l'intentionalité et décroît avec la justification; il est généralement plus élevé lorsque les conséquences sont plus importantes et, de même, lorsque les conséquences sont néfastes. Cependant, les interactions significatives qu'on peut observer indiquent que Peffet de chacune des variables est, à quelque degré, influencé par les deux autres. La nationalité entraîne un effet global significatif pour un seul âge; mais elle est en interaction avec les variables liées à la causalité et aux conséquences dans tous les groupes. En général, les sujets latins (Cubains et Portoricains) font des distinctions plus fines que les Américains entre les degrés de causalité lorsque les conséquences sont bénéfiques; ceci est particulierement apparent pour les sujets les plus jeunes. II est difficile d'interpréter les différences entre nationalités : la meilleure explication reléve sans doute des différences dans les relations familiales et dans la maniere d'élever les enfants.     

A comparison of children with serious emotional disturbance served in residential and school settings

The National Adolescent and Child Treatment Study (NACTS) was designed to study children identified and served by the public mental health and special education systems as seriously emotionally disturbed. Children (N=812) and their parents (N=740) participated in the first wave of data collection in this longitudinal study. Subjects lived in six states, with approximately half in psychiatric residential treatment centers and the other half in public school special education programs. A multi-method, multi-source methodology was employed. The sample is characterized by externalizing problems, poor adaptive functioning, and substantial academic deficits. Residential children were more likely to have blended families, were more likely to have previously received residential treatment, and had higher rates of conduct disorder, anxiety, and attention deficit disorder, as measured by the Diagnostic Interview Schedule for Children. The two groups did not differ on intelligence, age of onset, or rates of schizophrenia or depression. The data suggest the presence of greater at-risk factors in the residential group and different paths of entry into special education and residential treatment programs.