The effects of response-dependent and response-independent methods on delayed alternation

Two frequently used methods of producing delayed alternation were compared at two ITI levels, 20 see and 6 min. One method alternated reward according to a fixed schedule (response independent), while the other demanded placement of reward opposite to the S’s previous response (response dependent). The response-dependent method produced a higher number of correct responses and alternations at both ITIs. Increasing the ITI duration from 20 sec to 6 min produced reliable decreases in the number of correct choices and alternations produced by Ss trained according to either procedure.     

Peak shift revisited: a test of alternative interpretations

In Experiment 1, 2 groups of human subjects were trained to respond to 1 of 2 light intensity stimuli, S2 or S4, and then were tested for generalization with a randomized series of increasing values from S1 to S11. Both groups, including the group trained to respond to dimmer value, showed peak shifts to a brighter more centrally located test stimulus. In Experiment 2, which used line angle stimuli, both the size of the difference between S+ and S- and the range of test stimuli that extended beyond S+ were varied. The larger the S(+)-S- separation and the larger the range, the greater was the peak shift obtained. In Experiment 3, training involved an S- (line angle) surrounded by 2 S+ values with testing symmetrical about the training values and covering either a narrow or a wide range. The wide range produced greater peak shifts in both directions from S-. All 3 experiments support an adaptation-level interpretation of intradimensional discrimination learning and generalization test performance in human subjects. Related work with animals suggests the presence of similar processes.     

Working with shame in psychoanalytic treatment

Shame is a central human affect, reflecting feelings of defect, inferiority, and failure of the self. It is, therefore, a proper focus for psychoanalytic treatment. Beginning with Freud's seminal attention to narcissism and the ego ideal, the possibility for studying shame and its relation to the ego ideal (i.e. the loving function of the superego) was inherent in psychoanalytic theory, but Freud's pursuit of intrapsychic conflict and the punitive superego postponed further elaboration of shame. Interest in the relation of the ego ideal to the superego (Hartmann, 1950; Reich, 1954), and in the ideal self (Sandler et al., 1963; Schafer, 1960, 1967) opened the way to further study of shame. Kohut's contributions, with their focus on narcissism and self-pathology, have given a language and perspective on self-deficits allowing elaboration of shame's place in psychoanalytic treatment. In this paper, I have focused on the treatment of shame in two patients. I suggest that shame lies at the very center of the narcissistic patient's pathology, with primary internal shaming (directed at the self's failures and inadequacies) permeating all aspects of the treatment. For the neurotic patient, shame is more circumscribed, reflecting partial failures of the self; it tends to be reactive, relating to passive withdrawal from internal conflict and castration fears, and is intermixed with oedipal manifestations. I have described clinical sequences that demonstrate my approach to working with shame in each of these patients. In both cases, the task is to recognize, acknowledge, accept, and investigate the patient's shame. Only after such empathic investigation can underlying conflictual and genetic derivatives be productively pursued. This sequence is often intuitively followed in analysis, but in this paper I have attempted to articulate more systematically shame's role in psychoanalytic treatment.     

A LISP program to determine similarity relations in letter displays

Similarity relations between letters are important in displays used in tacbistoscopic recognition experiments. A LISP program is described that calculates similarity relations on the basis of an empirical letter-similarity matrix or on the basis of feature sharing in a feature-set definition supplied by the user. With either derivation method, there are three options for the type of average to be calculated for target display: (1) the average for the whole target, (2) the average for each letter in the target paired to all other letters in the target, and (3) the average of each letter in the target paired with its immediate neighbors.     

A modified beta binomial model with applications to multiple choice and taste tests

A modified beta binomial model is presented for use in analyzing ramdom guessing multiple choice tests and certain forms of taste tests. Detection probabilities for each item are distributed beta across the population subjects. Properties for the observable distribution of correct responses are derived. Two concepts of true score estimates are presented. One, analogous to Duncan's empirical Bayes posterior mean score, is appropriate for assessing the subject's performance on that particular test. The second is more suitable for predicting outcomes on similar tests.This research was made possible by a grant from the Center for Food Policy Research, Graduate School of Business, Columbia University.     

Exactly how manyp values is a picture worth? A commentary on Loftus’s plot-plus-error-bar approach

Loftus (1993b) has recently argued that hypothesis testing is largely irrelevant and should be replaced with a “plot-plus-error-bar” (PPE) presentation of the data. We agree that such figures can be useful. However, they do not preclude standard hypothesis testing procedures, and they should be used to supplement rather than to supplant the latter. The insufficiency of PPEs is most apparent in the case of mixed designs and factorial within-subject designs. In such cases, there is no single value that is appropriate to represent the standard error.     

Turbulence,emergence and multi-scale modelling

The paper begins with a generic discussion of modelling, focusing on some of its practices and problems. I then move on to a philosophical discussion about emergence and multi-scale modelling; more specifically, the reasons why what looks like a promising strategy for dealing with emergence is sometimes incapable of delivering interesting results. This becomes especially evident when we look more closely at turbulence and what I take to be the main ontological feature of emergent behavior—universality. Finally, I conclude by showing why, despite displaying multi-scale behaviour and some of the characteristics we identify with emergence, turbulence fails to fit neatly into the latter category and is not successfully captured using multi-scale modelling. The complex nature of turbulence illustrates the difficulties in characterizing emergence and why specific criteria are needed in order to prevent every complex behaviour we don’t understand being classified as emergent.