Cognitive efficiency modes in old age: performance on sequential and coordinative verbal and visuospatial tasks

In an experiment using a large set of verbal and spatial tasks requiring low or high degrees of executive control, 3 distinct age-related effects were found. The smallest effect (no slowing) was tied to lexical tasks with low executive involvement, the largest deficit (age-related slowing factor of 2.2) was tied to visuospatial tasks with high executive involvement, an intermediate level of deficit (slowing factor of 1.7) was found for visuospatial tasks with low executive load and verbal tasks with high executive load. These age-related dissociations were incompatible with any "common cause" formulation. The mechanism responsible for the dissociation between verbal and visual tasks, and between low and high executive load remains to be determined. The latter may reflect capacity limits.     

Using segmented linear regression models with unknown change points to analyze strategy shifts in cognitive tasks

Some years ago, Beem (1993, 1995) described a program for fitting two regression lines with an unknown change point (Segcurve). He suggested that such models are useful for the analysis of a variety of phenomena and gave an example of an application to the study of strategy shifts in a mental rotation task. This technique has also proven to be very fruitful for investigating strategy use and strategy shifts in other cognitive tasks. Recently, Beem (1999) developed SegcurvN, which fitsn regression lines with (n - 1) unknown change points. In the present article we present this new technique and demonstrate the usefulness of a three-phase segmented linear regression model for the identification of strategies and strategy shifts in cognitive tasks by applying it to data from a numerosity judgment experiment. The advantages and shortcomings of this technique are evaluated.     

Coherence-driven resolution of referential ambiguity: A computational model

We present a computational model that provides a unified account of inference, coherence, and disambiguation. It simulates how the build-up of coherence in text leads to the knowledge-based resolution of referential ambiguity. Possible interpretations of an ambiguity are represented by centers of gravity in a high-dimensional space. The unresolved ambiguity forms a vector in the same space. This vector is attracted by the centers of gravity, while also being affected by context information and world knowledge. When the vector reaches one of the centers of gravity, the ambiguity is resolved to the corresponding interpretation. The model accounts for reading time and error rate data from experiments on ambiguous pronoun resolution and explains the effects of context informativeness, anaphor type, and processing depth. It shows how implicit causality can have an early effect during reading. A novel prediction is that ambiguities can remain unresolved if there is insufficient disambiguating information.     

Psychoanalytic training experience and postgraduate professional development: A survey of six decades of graduate analysts

This exploratory study explored the training and post‐training experience of graduates of the Chicago Institute for Psychoanalysis. All living graduates of the past six decades were invited to complete a survey that addressed their training analysis, classroom work, supervision and other training experiences as well as their degree of post‐graduation involvement in teaching, supervising, study groups and other professional endeavors. They were also asked to rate their sense of themselves as psychoanalysts and their satisfaction with their analytic career. Further, they were encouraged to provide spontaneous narrative data. Our findings contribute to the current understanding of the careers of psychoanalysts – including that there is a difference in generational cohorts regarding professional satisfaction, identification as an analyst, and experience of training. We also found that there are no real differences between analysts who do and do not have analytic patients on some important variables: supporting analysis as a treatment method, identifying oneself professionally with psychoanalysis, and disillusionment with psychoanalysis – which is consistent with other studies. Also discovered were differences between male and female analysts' perception of certain aspects of their training.