Priming and communication: Social determinants of information use in judgments of life satisfaction

Two experiments examined the effects of answering a question about a specific component of life satisfaction on respondents' assessment of their overall satisfaction with life. The results suggest that the use of primed information in forming subsequent judgments is determined by Grice's conversational norms. In general, answering the specific question increases the accessibility of information relevant to that question. However, the effect that this has on the general judgment depends on the way in which the two questions are presented. When the two questions are merely placed in sequence without a conversational context, the answer to the subsequent general question is based in part on the primed specific information. As a result, the answer to the general question becomes similar to that for the specific question (i.e. assimilation). However, this does not occur when the two questions are placed in a communication context. Conversational rules dictate that communicators should be informative and should avoid redundancy in their answers. Therefore, when a specific and a general question are perceived as belonging to the same conversational context, the information on which the answer to the specific question was based is disregarded when answering the general one. This attenuates the assimilation effect. The conditions under which these different processes occur are identified and experimentally manipulated, and the implications of these findings for models of information use in judgment are discussed.     

Nonregulation of food intake in restrained,emotional, and external eaters

In the present study, regulation of ice cream intake after a preload was examined in 20 high and 20 low scorers (median split) on subscales of the Restraint Scale (RS) (Herman, Polivy, Pliner, Threshold, & Munic, 1978) and the Dutch Eating Behavior Questionnaire (DEBQ) (van Strien, 1986). For each subscale it was hypothesized that low scorers would regulate their ice cream intake. High scorers on disinhibitive scales (i.e., the RS and the DEBQ-emotional and -external subscales) were expected to counterregulate after a preload. In contrast, high scorers on the inhibitive DEBQ-restraint scale were expected to regulate their ice cream intake. A robust effect was found: high scorers never regulated ice cream intake after a preload on either the disinhibitive or the inhibitive scales, while low scorers always did. For the RS a significant interaction effect was found [F(1,39)=4.97, p=.03]. None of the other subscales showed interaction effects. The t tests showed that low scorers on all subscales ate significantly less after a preload than without one, while high scorers on all subscales did not differ in intake after a preload or without one. This nonregulation appears to be characteristic of people preoccupied with caloric intake, regardless of the content of the preoccupation.     

Does bingeing restore bulimics' alleged 5-HT-deficiency?

The co-occurrence of bingeing and depressed mood in bulimics may be explained by one pathogenic process: hyposerotonergic functioning. A relatively high carbohydrate intake improves mood and raises 5-HT level. Therefore, several authors suggested that the carbohydrate intake during binges may be a form of self-medication to compensate for bulimics' alleged hyposerotonergic functioning, thereby improving mood. This view, in which bingeing compensates for central 5-HT deficiencies, assumes that bulimics' binges contain relatively more carbohydrates than bulimics' non-binge-eating episodes. In the present study, bulimics' binge-eating and non-binge-eating episodes were compared as to macronutrient and calorie intake. However, no support was found for the hypothesis that binge-eating enhances brain serotonin.     

Conditions for rasch-dichotomizability of the unidimensional polytomous rasch model

Jansen and Roskam (1986) discussed the compatibility of the unidimensional polytomous Rasch model with dichotomization of the response continuum. They derived a rather strict condition in which dichotomization of multicategory data that fit the unidimensional polytomous Rasch model, results in dichotomous data which fit the dichotomous Research model with effectively the same subject parameter. In this paper a more general dichotomization condition is derived for the polytomous Rasch model, which appears less restrictive, but upholds that the intrinsic logic of the unidimensional polytomous Rasch model defies dichotomization in general. The robustness of dichotomous analysis investigated in a simulation study. It shows a close relation with the two-parameters (Birnbaum) model. Theoretical and methodological implications are discussed.The authors are indebted to H. Müller (personal communication, August 1986), for giving an example which pointed toward the core equation in this paper. The authors also acknowledge the critical comments of Th. Bezambinder and P. Wakker, and of Psychometrika's reviewers to an earlier version of this paper.     

Assessing clinical pragmatism

"Clinical pragmatism" is an important new method of moral problem-solving in clinical practice. This method draws on the pragmatic philosophy of John Dewey and recommends an experimental approach to solving moral problems in clinical practice. Although the method may shed some light on how clinicians and their patients ought to interact when moral problems are at hand, it nonetheless is deficient in a number of respects. Clinical pragmatism fails to explain adequately how moral poblems can be solved experimentally, it underestimates the relevance and importance of judgment in clinical ethics, and it presents a questionable account of the role that moral principles should play in moral problem solving.     

Response to Commentaries on "The Ketamine Model of the Near-Death Experience ..."

The commentators on my paper raised several interesting issues. Set and setting do influence drug effects, but they also influence near-death experiences (NDEs). Some NDEs are very anxiety-generating, just like some ketamine experiences, though frightening NDEs have been ignored by most researchers. High frequency, compulsive ketamine use is rare. While dimethyltryptamine (DMT) may induce NDEs, this is far from typical, while NDE-like effects are typical of ketamine. Rapidity of onset is not related to the capacity of a drug to induce NDEs. The reality of endopsychosins is doubtful, but the reality of N-methyl-D-aspartate (NMDA) blocking mechanisms is not. NDEs and dream sleep may involve similar mechanisms. Altered states of consciousness do not require a normally functioning brain. Finally, I discuss the possible evolutionary advantage of the NDE mechanism.