On scaling models applied to data from several groups

Statistical methods are presented to facilitate a more complete analysis of results obtained when a scaling model is applied to data from two or more groups. These methods can be used to (a) compare the corresponding estimated latent distributions obtained using the scaling model applied to the different groups, (b) compare the corresponding estimated item reliabilities (or item response error rates) for the different groups, and (c) test whether the scaling model applied to the several groups can be replaced by a more parsimonious scaling model that includes various homogeneity constraints (i.e., constraints that describe which parameters in the model are the same for the several groups). Various kinds of scaling models are considered here in the multiple-group context.Support for this research was provided in part by the National Science Foundation, to Clogg by Grant No. SES-7823759 and to Goodman by Grant No. SES-8303838. Clogg and Goodman were Fellows at the Center for Advanced Study in the Behavioral Sciences when part of the research was done, with financial support provided in part by National Science Foundation grant BNS-8011494 to the Center. The authors are indebted to Mark P. Becker and James W. Shockey for helpful comments.     

Cognitive processes in verbal-number production: inferences from the performance of brain-damaged subjects

This article presents a model of the cognitive processes involved in the spoken production of verbal numbers (e.g., thirteen thousand four hundred two). On the basis of single-case studies of two brain-damaged subjects with number production deficits, we argue that verbal-number production involves the generation of a syntactic frame that constitutes a plan for the production of the appropriate sequence of words. The syntactic frame specifies each to-be-retrieved word in terms of a number-lexical class (i.e., ones, teens, or tens) and a position within that class. These class/position-within-class specifications guide the retrieval of lexical representations from a production lexicon that is partitioned into functionally distinct ones, teens, and tens classes. We conclude with a brief discussion of the rationale for, and advantages of, using patterns of impaired performance as a basis for drawing inferences about normal cognition.     

Social framework testimony in employment discrimination cases

The use of social framework testimony by social psychologists in employment discrimination cases is expanding. After reviewing the legal background of this type of testimony, we describe its content and discuss an important Title VII case of sex discrimination where the testimony played a critical role. We also distinguish social framework testimony from other types of expert testimony by psychologists.     

A framework for assessing program institutionalization

This article presents a framework for assessing the institutionalization of programmatic innovations in nonprofit community agencies and in schools. Institutionalization is the attainment of long-term viability and integration of innovations in organizations. Institutionalization is often characterized as the final stage in an innovation diffusion process. The framework was derived from a qualitative study of ten health promotion programs that were innovations in their host organizations. The framework is a two dimensional matrix: one dimension consists of organizational subsystems; the other consists of levels of institutionalization termed passages, routines, and niche saturation. The cells of the matrix are the basis for assessing program institutionalization. Robert M. Goodman is a research assistant professor in the Department of Health Behavior and Health Education at the University of North Carolina's School of Public Health. Currently, Dr. Goodman directs a four-year intervention study on the dissemination of tobacco prevention curricular funded by the National Cancer Institute. Allan Steckler is an associate professor in the Department of Health Behavior and Health Education at the University of North Carolina's School of Public Health. Dr. Steckler is also the principal investigator of the National Cancer Institute tobacco prevention study.     

Perinatal complications in births to low socioeconomic status schizophrenic and depressed women.

Pregnancy and birth complications in births to 57 schizophrenic, 28 depressed, and 31 well women were studied. The sample was of low socioeconomic status and predominantly African-American. The study extended earlier work on the perinatal status of infants born to schizophrenic women by including measures of severity of maternal disturbance, mother's age, IQ, and premorbid social competence, and family composition. The results show that maternal competence and the mother's diagnosis of schizophrenia were significant variables in determining the likelihood of less adequate prenatal care and more complicated births. The results indicate the importance of an assessment not only of a disturbed woman's diagnosis but also of her personal background and social competence in determining the likelihood of obstetrical complications.     

Effectiveness of a consultation intervention to promote tobacco control policies in Northwest Indian tribes: Integrating experimental evaluation and service delivery

A quasi-experimental replication of an intervention for promoting tobacco control policies in Northwest Indian tribes is described and the process of intervention including issues of collaboration among research institutions and Indian organizations is discussed. The policy intervention was evaluated using a pretest-posttest design wherein 20 tribes that had served as wait-list controls now received the intervention. The intervention comprised a tribal representative attending a kickoff orientation; follow-up visits to the tribes; distribution of tobacco policy workbooks; and phone call consultations. Policy status and stringency were assessed by means of telephone interviews with two key contacts per tribe, and by a count of enacted policies. There were significant pre-post changes in the primary outcome measure, a composite summary score of tobacco policy stringency, and changes were also reflected in enacted policies. The intervention effects observed were similar to those found in the prior randomized trial and suggest a robust, disseminable intervention. Much of the success achieved was attributed to the role of an Indian organization in planning the project and implementing the intervention and evaluation protocols.     

Letter Dyslexia in a Letter-by-Letter Reader

We describe a letter-by-letter patient who produced misreading errors in both letters in isolation and in words. All errors were visual in nature. We hypothesized an access deficit to the abstract visual representation of letters that prevents letter identification. This deficit could account for the patient's letter-by-letter behavior, since each letter constituted a potential identification problem. An access deficit, moreover, could also explain the patient's letter visual errors. In access processing, in fact, the letters sharing common structural features in their abstract representations were the ones more frequently mismatched.     

Phase Transitions and Critical Fluctuations in Rhythmic Coordination of Ipsilateral Hand and Foot

Four subjects performed rhythmic movements of the ankle and the wrist in time with an auditory metronome, in two modes of coordination, antiphase and in-phase. The forearm was placed in either a prone or a supine position. When movements were prepared in the antiphase mode, spontaneous transitions to the in-phase mode, or to phase wandering were observed as metronome frequency was increased. When prepared in the in-phase mode, transitions between in-phase modes or to phase wandering were occasionally observed. Predicted signature features of nonequilbrium phase transitions were noted, including loss of stability and critical fluctuations. The stability of the movement patterns was determined by spatial (dependent upon the direction of movement) rather than anatomical (dependent on the coupling of specific muscle groups) constraints. The position of the forearm had no consistent bearing upon the variability of the phase relations between the limbs, the frequency of phase transitions, or the time of onset of transitions. These results are discussed with reference to the coordination dynamics (e.g., multistability, loss of stability) of multijoint movements.     

Social problem solving: A moderator of the relation between negative life stress and depression symptoms in children

The social problem-solving skill of generating effective alternative solutions was tested as a moderator of the relation between negative life stress and depressed mood in children. Boys ( n= 25) and girls ( n= 25), ages 8 to 12 years, from inner-city, lower socioeconomic group families, completed measures of depression symptoms, negative impact of life events, and quantity and effectiveness of alternative solutions to social problems. Results indicated that the effectiveness of alternative solutions children generate in response to peer social problems moderates the relation between stress and depression. Children who experienced a high impact of negative life events, with less effective social problem-solving skills, reported higher levels of depression compared to children who experienced a high impact of negative life events but exhibited more effective social problem-solving skills. Results are discussed in terms of alternative theoretical models for the mechanisms whereby effective social problem-solving skills moderate stress-related depression.     

USE OF EXTINCTION AND REINFORCEMENT TO INCREASE FOOD CONSUMPTION AND REDUCE EXPULSION

Extinction and reinforcement contingencies were used to treat 2 children with feeding disorders. Positive reinforcement and avoidance extinction effectively increased food acceptance but also increased food expulsion. Reduced expulsion and increased swallowing were achieved by repeated presentation of expelled food, a second extinction component.