First onset versus recurrence of depression: differential processes of psychosocial risk.

Differential risk factors for the onset of depression were prospectively examined in a community-based sample of adolescents (N = 1,709), some of whom had a history of major depressive disorder (MDD; n = 286) and some of whom did not (n = 1,423). From the theories of J. Teasdale (1983, 1988) and R. Post (1992) concerning the etiology of initial versus recurrent episodes of depression, the authors hypothesized that (a) dysphoric mood and dysfunctional thinking styles would be correlated more highly among those with a previous history of MDD than among those without a history of MDD; (b) dysphoric mood or symptoms and dysfunctional thinking would be a stronger predictor of onset of recurrent episodes (n = 43) than of first onsets (n = 70); and (c) major life stress would be a stronger predictor of first onsets of MDD than of recurrent episodes. The results provide support for the 3 hypotheses and suggest that distinct processes are involved in the onset of first and recurrent episodes of MDD.     

Fowler's Stages of Faith Development in an Honors Science-and-Religion Seminar

According to Paul Tillich's understanding of religion as "ultimate concern," a religious dimension is implicit in all university curricula. A science-and-religion course, such as one taught at Southeast Missouri State University, can offer students the opportunity to integrate their worldview, taking seriously both religious ideas and scientific information. Assignments based on A. E. Lawson's model of a learning cycle provide a vehicle for evaluating significant student learning leading toward fuller integration. The stages of faith developed by James W. Fowler serve as a fruitfull framework for interpreting changes in student viewpoints. Fowler's six stages of faith are characterized. Examples from student writing assignments demonstrate shifts in the cognitive understanding of faith that coincide with Fowler's stages.     

Three loneliness scales: an assessment of their measurement properties

In loneliness research, there has not been a consensus concerning either the factorial structure of most loneliness scales or the factorial structure of each of the proposed dimensions of loneliness. We investigated theoretical and operational definitions, as well as the factorial structure, based on gender of three loneliness scales: the University of California at Los Angeles (UCLA) Loneliness Scale, the Loneliness Deprivation Scale, and the Emotional/Social Loneliness Inventory. Unidimensional, best-fit models of the structures of these scales are presented.     

Need for achievement and performance on measures of behavioral fluency.

This investigation was designed to assess the relationship between a validated personality characteristic, need for achievement (nAch), and performance on measures of behavioral fluency. To infer this relationship, 50 neurologically intact college undergraduates were administered a questionnaire assessing nAch and a battery of tests including a short form of the WAIS and measures of behavioral fluency (i.e., verbal fluency). Statistical analysis indicated that subjects high on nAch obtained higher scores than subjects low on nAch on the measures of figural fluency and the WAIS Verbal Scale. No significant difference on verbal fluency was seen between the two groups. Secondly, the group high on nAch also had a higher mean Verbal IQ but not a higher mean Performance IQ as measured by a short form of the WAIS than did subjects scoring low on nAch.     

Some applications of problem-solving versus decision-making to management

Two contrasting views of decision theory and of problem solving are presented. One view is that the decision-maker is a problem solver with available alternatives from which to choose. The other view is that decision-making processes and those in problem solving differ in kind. In the latter view, decision making is the selection of an alternative; problem solving, the invention of an alternative different in meaningful ways from any previously existing. The distinctions between the two points of view are elaborated mainly in the context of conflict resolution. Illustrations are presented of applications of problem solving to potential conflict between a lecturer and an already hostile group; to conflict between departments in an organization; to confict between individuals and to internal incapacitating conflict of an individual. Additional illustrations are given of management problems not involving conflict. These offer choices between alternatives as well as the opportunity to resolve the choice through problem solving. The latter yielded solutions different from and superior to either existing alternative.     

APPROXIMATING CHAOTIC BEHAVIOR

Abstract— Human subjects received feedback showing how closely their responses approximated the chaotic output of the logistic difference function. In Experiment 1, subjects generated analog responses by placing a pointer along a line. In Experiment 2, they generated digital responses in the form of three-digit numbers. In Experiment 3, feedback was sometimes provided and other times withheld. Responses came to approximate three defining characteristics of logistic chaos: Sequences were "noisy," they were extremely sensitive 10 initial conditions, and lag I autocorrelation functions were parabolic in form. Chaos theory may describe some highly variable although precisely determined human behaviors.     

Evidence for a parallel input serial analysis model of word processing

A parallel input serial analysis (PISA) model of word processing was developed and tested. The goal was to expand on the "critical processing duration" hypothesis of Johnson, Allen, and Strand (1989) so that both single-word and multiple-word presentation, letter detection data could be explained. In Experiments 1-3 four different word frequency categories on a single-presentation, letter detection task were used. These three experiments indicated that there was a curvilinear relationship between word frequency and letter detection reaction time (RT). That is, letter detection RTs for medium-high-frequency words were significantly longer than letter detection RTs for very-high-, low-, and very-low-frequency words. These results support the PISA model rather than the Healy, Oliver, and McNamara (1987) version of the unitization model. In Experiments 4-5 multiple-presentation (i.e., two words), letter detection tasks were used. The PISA model could also account for the results from these two experiments, but the unitization model could not.     

Reinstating study context produces unconscious influences of memory

Having read a word does more to benefit its later perceptual identification when many, rather than few, of the words in the test list have been previously read. Some have suggested that this proportion overlap effect is produced by an intentional use of recognition memory or recall in the perceptual identification task. Contrary to this account, we found that words that are easily recognized (words generated from an anagram at study) do not gain more from increasing overlap than do words that are poorly recognized (words read at study). These findings are problematic for claims that word perception relies on a module, such as a logogen system, that is separate from the rest of memory.     

DSM-IV Literature reviews: Rationale,process, and limitations

DSM-IV will benefit from the extensive research and interest in diagnosis generated in large part by DSM-III. The development of DSM-IV is proceeding through three stages of empirical documentation, including literature reviews, analysis of unpublished data sets, and field trials. This paper discusses the rationale, process, and limitations of the literature reviews. The purpose of the literature reviews is to provide and to document a comprehensive review of the clinical and empirical literature to facilitate objective and empirically based decisions. The review process is guided by the explicit and systematic methods developed within meta-analysis. Limitations of the reviews are also discussed.The opinions expressed in this paper are those of the authors and do not necessarily represent the position of the American Psychiatric Association and its Task Force on DSM-IV.     

On the exponent in the "generalized" matching equation

A power function equation between ratios of behavior and ratios of reinforcement rates has been called a generalized form of Herrnstein's (1961) matching law, even without a formal relationship having been shown between the two equations. The present work uses a functional relationship to prove that when ratios of reinforcement are not equivalent to ratios of behavior, and the transform leading to this inequality is consistent for every pair of reinforcement rates, the result is a power function relationship between response and reinforcement ratios. The label “generalized matching equation” for the power function equation is thus validated formally.