An irt-based model for dichotomous longitudinal data

The LLRA (linear logistic model with relaxed assumptions; Fischer, 1974, 1977a, 1977b, 1983a) was developed, within the framework of generalized Rasch models, for assessing change in dichotomous item score matrices between two points in time; it allows to quantify change on latent trait dimensions and to explain change in terms of treatment effects, treatment interactions, and a trend effect. A remarkable feature of the model is that unidimensionality of the item set is not required. The present paper extends this model to designs with any number of time points and even with different sets of items presented on different occasions, provided that one unidimensional subscale is available per latent trait. Thus unidimensionality assumptions within subscales are combined with multidimensionality of the item set. Conditional maximum likelihood methods for parameter estimation and hypothesis testing are developed, and a necessary and sufficient condition for unique identification of the model, given the data, is derived. Finally, a sample application is presented.To my friend Josef Roppert who has taught me how to apply statistical reasoning to substantive problems.This research was supported in part by Österreichische Forschungsgemeinschaft under grant No. 01/0054. The author wishes to thank B. Wild for the numerical computation of the sample application in section 5.     

Understanding correlates of change by modeling individual differences in growth

The study of correlates of change is the investigation of systematic individual differences in growth. Our representation of systematic individual differences in growth is built up in two parts: (a) a model for individual growth and, (b) a model for the dependence of parameters in the individual growth models on individual characteristics. First, explicit representations of correlates of change are constructed for various models of individual growth. Second, for the special case of initial status as a correlate of change, properties of collections of growth curves provide new results on the relation between change and initial status. Third, the shortcomings of previous approaches to the assessment of correlates of change are demonstrated. In particular, correlations of residual change measures with exogenous individual characteristics are shown to be poor indicators of systematic individual differences in growth.The research reported here was supported by a grant from The Spencer Foundation to the senior author and by the Study of Stanford and the Schools.     

Behavioral economics and behavioral momentum

Some relations between elasticity of demand and the conditions of reinforcement are reanalyzed in terms of resistance to change, in ways suggested by the metaphor of behavioral momentum; some relations between resistance to change and the conditions of reinforcement are reanalyzed in terms of elasticity of demand, in ways suggested by behavioral economics. In addition, some data on labor supply in relation to variable-ratio schedules and alternative reinforcement are reanalyzed in terms of resistance to change and compared with steady-state resistance data for performance on multiple and concurrent interval schedules. The results of these studies can be summarized by two functions based on the behavioral momentum approach, relating relative behavioral mass to relative reinforcement per response or per unit time. The former is a relation between relative unit price and relative behavioral mass, suggesting the possibility of convergent measurement of a theoretical construct common to both approaches. However, the momentum and economic approaches differ fundamentally on whether it is preferable to construe discriminated operant behavior as selected and strengthened by its consequences or as part of a behavior–consequence bundle that maximizes utility.     

Individual,organizational, and societal empowerment: A study of the processes in a Nicaraguan agricultural cooperative

Defined and examined the personal (material and psychological), organizational, and societal goals of empowerment. This exploration of empowerment was primarily based on 7 months of participant observation in an agricultural cooperative in Nicaragua in 1989. The research focused on the perspectives of the participants, internal program functioning, and relations to local organizations and the national context. This study shows that some factors in the cooperative setting enhanced empowerment at each level, while others impeded its development. The cooperative met immediate needs, and provided social status and a degree of autonomy in society. Its structure allowed for broad participating in decision making and control. “Sense-making” and informal consciousness-raising processes facilitated psychological empowerment. These processes were hidden in apparent disorganization and thus not recognized by local service providers. Fears of speaking in meetings and the reluctance to face crises were intense and influential. Opinions and behavior of outsiders and the environmental context, although seemingly helpful, also had detrimental effects. Parallels are drawn to empowerment theory and findings from other populations. This article is based on the author's unpublished dissertation in Social Psychology at the Claremont Graduate School. The name of the cooperative was not disclosed to protect the members. The author thanks Douglas Perkins for his helpful support and valuable comments on earlier drafts.     

Images of midlife development among young,middle-aged,and older adults

This study examined patterns of perceived change across adulthood in a sample of 121 young (M age=19.8 years), middle-aged (M age=47.9 years) and older (M age=74.6 years) adults. Subjects rated amount of stress in life domains, salience of life course issues, and nature of personal attributes for young, middle-aged, and older targets. Seven prototypical patterns of perceived change were found. Midlife was seen as a period with many responsibilities, increased stress in several domains, and little time for leisure, but also as a peak in competence, ability to handle stress, sense of control, productivity, and social responsibility. The findings are discussed in terms of losses, which were seen primarily in the physical realm, and gains, which were mainly seen in the psychological and social realms.     

Why Don't People Change? A Psychoanalytic Perspective

From a psychoanalytic perspective, a central reason that people do not easily change is their fear of the dangers that they believe, at some level, change entails. These dangers include relinquishment of infantile wishes and fantasies, anxiety that would be experienced were defenses weakened, guilt, fantasies that change would harm a parental figure or threaten a vital relationship. Other factors that prevent change and maintain the sameness of behavior include defenses, unconscious pathogenic beliefs, devotion and loyalty to early figures, stable internal working models of self, other, and prototypic interactions, and emitting cues that elicit responses from others that confirm these working models. Finally, 1 discuss some selective psychoanalytic research on therapeutic change.     

The Idea of Moral Progress

This paper shows that moral progress is a substantive and plausible idea. Moral progress in belief involves deepening our grasp of existing moral concepts, while moral progress in practices involves realizing deepened moral understandings in behavior or social institutions. Moral insights could not be assimilated or widely disseminated if they involved devising and applying totally new moral concepts. Thus, it is argued, moral failures of past societies cannot be explained by appeal to ignorance of new moral ideas, but must be understood as resulting from refusals to subject social practices to critical scrutiny. Moral philosophy is not the main vehicle for disseminating morally progressive insights, though it has an important role in processes that lead to moral progress. Yet we have grounds for cautious optimism, since progressive moral insights can be disseminated and can, sometimes, have constructive social effects.     

Revolutions, Samurai, and Reductons: The Parodoxes of Change and Continuity in Iran and Japan

This paper assesses policies for managing cultural diversity in Iran and Japan, with particular focus on the treatment of women as a cultural minority. Following social reducton theory, the distinction between rates of cultural change at macro- and microlevels is highlighted. It is argued that macro political and economic changes have taken place fairly rapidly, but micro changes in everyday social practices have changed much more slowly. The latter, it is argued, are structured by social reducton systems, which can act to slow down societal change. This insight is used to cast light on the situation of women and other minorities in North America.     

Influences of Adaptation to Communist Rule on Value Priorities in Eastern Europe

The basic value priorities prevalent in Eastern Europe are studied in a cross-national comparison. Analyses of the implications of adaptation to life circumstances under communist regimes lead to the hypotheses that East European samples are likely to attribute especially high importance to conservatism and hierarchy values and low importance to egalitarianism, intellectual and affective autonomy, and mastery values. The same hypotheses apply to differences between countries within Eastern Europe in which there was greater or lesser communist penetration. These hypotheses are largely supported with data both from samples of school teachers and of university students from nine Eastern European and 12 Western European countries. Various possible alternative explanations are discussed: national economic level, religion, earlier shared history, effects of totalitarianism, and distinctiveness of Western Europe.     

Change mechanisms in cognitive therapy of a simple phobia: Logical analysis and empirical hypothesis testing

The effectiveness of two hypothesized change mechanisms in cognitive therapy was investigated: logical analysis and empirical hypothesis testing. Thirty-eight spider phobics, as determined by performance on a behavioral avoidance test, were randomly assigned to either one of these two conditions or to a no-treatment control condition. Subjects participated in three group sessions. Outcome phobia questionnaire data suggested that both mechanisms produced desirable changes in a short period of time, with stronger evidence that logical analysis was superior to the control. Outcome from the behavior avoidance test and self-efficacy ratings failed to reach statistical significance but the trends were in the direction of positive change. Results are discussed in terms of the tripartite response dessynchrony hypothesis. Suggestions for future process research in cognitive therapy are provided.William O'Donohue, Ph.D., is an assistant professor of psychology at Northern Illinois University.Jeff Szymanski is a graduate student in clinical psychology at Northern Illinois University.The authors would like to thank Christine Casselles, Melissa McKelvie, Thomas M. Brown, Jill C. Rudman, Bonnie Schrieber, Amy Ray, Anne Valle, Lisa Herold, Jacqueline Ryan, Heather Barta, and Angela Leek for their assistance in this project. Moreover, the authors are grateful to Sol Feldman and Jane Fisher for their comments on an earlier version of this paper.