Those cheating rats: male and female rats use odor trails in a water-escape "working memory" task.

Three-month-old Sprague-Dawley rats were trained on a working memory win-stay (spatial delayed matching-to-sample) water-escape task with the escape platform location the same for all subjects on a given trial, a procedure that maximizes the buildup of an odor trail to the escape platform. In subsequent tests during which the location of the escape platform varied randomly between subjects, the rats, especially the females, while continuing to perform above chance level, made increased errors. Varying the platform location between subjects eliminated odor trail as a nonambiguous cue for locating the escape platform. In a second experiment females performed better than males on a reference memory odor trail discrimination task which involved following the path of like-gender "pathmaker" rats to the escape platform. The relatively poor use of odor trails by the males was associated with a high frequency of choosing a preferred choice section or returning to the choice section selected first on the immediately preceding trial (perseveration). Collectively, the two experiments demonstrate that rats can use either working memory or odor trails to locate an escape platform in a water maze, and that they, especially females, will use odor trails in a working memory task if odor trails are available. Clearly, the location of the escape platform should be varied randomly between subjects in tests of working memory.     

Menstrual cycle effects on task performance examined in the context of stress research

The study examined the effects of degree of paramenstrual distress, signal frequency, task load and time on task on psychomotor performance across the menstrual cycle. Simple reaction time, choice reaction time and pursuit tracking were the tasks employed, and performance was assessed using the metrics of mean level, variability, and errors of omission and commission. The results showed performance as a function of menstrual cycle phase and paramenstrual distress to be highly task and metric specific, a finding typical of stressor variables: pursuit tracking was affected by phase, with mean performance at its worst premenstrually; choice reaction time was dependent on a complex interaction of experimental variables and measurement metrics; simple reaction time showed no significant effects. Patterns of attention allocation in a time-sharing situation combining both pursuit tracking and choice reaction time components were also investigated. Trends here indicated relatively better performance both menstrually and intermenstrually as components increased in signal/response frequency, with a corresponding deterioration premenstrually. Overall performance capacity appeared to be greatest at menstruation, and the degree of attentional selectivity was least. High distress women performed better on low frequency components, whereas asymptomatic women did better at higher signal rates.     

Concomitants of social support: Attitudes, personality characteristics, and life experiences

Determining the extent of social support and its consequences and personality correlates has been of increasing interest to researchers. The two studies reported here deal with the possibility that people low in social support are characterized by rigid, authoritarian personality characteristics and a lack of confidence in the support that informal social networks can provide. Groups differing in social support were compared on scales measuring attitudes toward mental illness and personal feelings of anomy. Subjects high in social support had more benign attitudes concerning the mentally ill and felt less anomy than did subjects low in social support. They also perceived their own early relationships with parents as being more positive. The findings are in agreement with several hypotheses about individual differences related to social support differences, and suggest that studies geared toward understanding the causal relations involved would be both theoretically and practically valuable.     

Will the real grandmother please stand up? The psychological reality of dual meaning representations

Two types of meaning representation are described, symptom and criterion, and it is argued that both have psychological status in mental representations of kinship terms. Certain symptoms, such as old age and biofocals for grandmothers, are likely indicators of grandmotherhood, but they do not reliably pick out all positive instances, nor do they indicate negative ones. Criteria specify the necessary and sufficient conditions for grandmotherhood: having a grandchild. The psychological reality of these two representations was demonstrated by asking children and adults to select kin-term exemplars from pictures in which both age and reciprocal kin symptoms are displayed, and to justify their selections. In both tasks, there was change with age away from using typical age as the sole basis for performance; older subjects selected pictures displaying reciprocal kin, and justified their choices by referring to the criterion. More important, at each age level, there was evidence for dual representation: Even subjects who selected pictures based on the age symptom often gave criterial justifications, and subjects who selected pictures based on the reciprocal kin symptom still preferred pictures displaying age symptoms in addition to the reciprocal kin.     

Aphasic adults' understanding of complex adverbial sentences

Twelve aphasics with relatively preserved auditory comprehension were tested for their understanding of four adverbial sentence types expressing the temporal order of events. The relative effects of order of mention, adverbial choice, and adverbial clause placement on subjects' comprehension were investigated. Only adverbial choice was significant with aphasics producing more errors of temporal order on after than before sentences. Subjects' error patterns were not similar to those of children acquiring language. The results are discussed with respect to the theory of lexical marking and the regression hypothesis.     

Family/school strategies in dealing with the troubled child

Often a troubled child will exhibit problem behaviors in school. In many cases, these behaviors can be controlled and quickly curtailed by the teacher. In other cases, parents may have to intervene with rules and consequences. Sometimes, however, both teacher and parents fail, and the child's school problems escalate until they have reached crisis proportions. At this point, a therapist often becomes involved. The therapist can greatly enhance his or her range of possible therapeutic strategies by temporarily including the child's teacher in the hierarchical reorganization of the family. The expansion of the family hierarchy to include the teacher expedites the problem-solving process. The phases of problem escalation and proposed hierarchical reorganization are offered by way of clinical principles and case illustrations to demonstrate this viewpoint.Barbara E. DiCocco, L.C.S.W., is the Clinical Coordinator of the RICA II Satellite Program, a bio-psycho-educational day program in Frederick, Maryland and is a private practicing fmaily therapist. Ellen B. Lott, Ph.D., Counseling Psychology, is a family therapist and psychometrician in the RICA II Satellite Program. Boththerapists are grateful to Jay Haley for his suggestions and support of this work.     

Instrumentation and software report: Computer-assisted coding of videotape material

The coding system described was originally devised to facilitate the analysis of mother-infant interaction. Our aims were to provide accurate measures of the duration of different activities, to enable identification of particular actions in order to carry out sequential analyses, and to allow systematic assessment and improvement of reliability. At the time recording began, there appeared to be no readily available systems which achieved all of these aims. The system described here enables coded videotape material to be examined with the assistance of a computer. This is implemented through two subsystems, those of record and playback. In the playback subsystem the behaviour units identified by a coder are mapped on to this record. This results in a protocol of behaviour on a highly accurate time base.     

Categories of environmental scenes

Environmental scenes are the settings in which human action occurs; since they constrain behavior, they are of interest to social, personality, and environmental psychologists. Scenes can also be viewed as a spatial generalization of objects, as well as the spatial contexts in which objects appear. As such, they are studied in perception and memory. Previous approaches to characterizing environments have relied on scaling techniques to yield a manageable number of dimensions or attributes by which environments can be compared. In contrast, the present research demonstrates development of a taxonomy of kinds of environmental scenes, where perceived attributes are obtained as a byproduct. A basic or preferred level of categorization in the taxonomy is also identified, based on measures of cognition, behavior, and communication. The basic level, for example, school, home, beach, mountains, corresponds to the level commonly used in the study of scene schemas in perception, memory, and environmental psychology, as well as to the level apparently most useful in other domains of knowledge concerned with environments, for example, architecture and geography.     

A comparison of deaf, normal, and brain damaged adults on a tachistoscopic task

Printed words and letters, pictures of signed words, and pictures of finger-spelled letters were presented tachistoscopically to deaf, normal, and brain-damaged adults. The findings suggest that (1) the deaf show no cerebral asymmetry for any of the material but found identification of the stimuli very difficult unless a forced-choice recognition procedure was used or the exposure time was very long; (2) both the normal and the brain-damaged groups show left hemisphere superiority for printed material but no cerebral specialization for signed material; (3) the left-right hemisphere difference is more marked in the brain-damaged group regardless of which hemisphere showed most damage. This may be explained, at least in some cases, by impaired transfer across the corpus callosum.