Multimodal signal detection: Independent decisions vs. integration

The pooling of information from simultaneous, spatially congruent auditory and visual stimuli is examined in a signal detection task. The paradigm used permits discrimination among a number of models of the decision mechanisms involved in processing multiple component stimuli. Parameter-free predictions are presented for the weighted integration model and for three versions of the independent decisions model. The data support an independent decisions model of the bimodal detection process in which attention is shared equally between modalities.     

Number: From the Nyāya to Frege-Russell

The aim of this paper is to present the Nyya concept of number in the light of contemporary philosophy and to show that the Frege-Russell concept of number does not contradict the Nyya concept of number but rather supplements it.     

The role of perceptual organization in the depth perception of kinetic lattice displays

College student subjects were asked to judge perceived depth in computer-generated displays. In all displays, one lattice of points moved through a stationary lattice in either a rowwise or columnwise direction. No points of the two lattices ever touched. Two display variables, strain and shear, each had a significant effect on depth ratings. Shear, however, was only effective at the level of strain for which depth ratings were high. The results confirm earlier studies in which “topological breakage” information was found to affect depth perception. The outcome of this study suggests that principles of perceptual organization can influence the nature of effective breakage information.     

Attending to multiple sources of information: I. The integration of information in decision making

Information relevant to a decision is often available from several sources, such as different sensory modalities or different spatial locations. Processing or utilization of such information is often selective in that some sources seem to have more influence on a decision or response than others. Many different theoretical mechanisms have been proposed to account for such selective (i.e., attentional) aspects of human information processing. This paper considers theoretical mechanisms which operate to integrate separate sources of information in order to make a binary decision. In particular, these mechanisms are studied in simple visual and auditory detection tasks as well as a Bayesian decision problem. Data from these experiments reject the idea that one integrates the relevant information from several sources prior to making a decision. Rather, one seems to form separate decisions about the information from each source and then integrate these decisions in order to select a response.     

Nutritional misinformation of children: A developmental and experimental analysis of the effects of televised food commercials

This study assessed the accuracy of judgments of 100 school age children as to the presence of real fruit content in 3 sets of cereals and beverages advertised on TV: real fruit, nonfruit, and artificially fruit flavored products. In the baseline session, accuracy was an increasing function of age, but children at each age were deceived about real fruit content of artificial fruit products. In session 2, the experimental group saw TV ads for 6 products embedded in a program (naturalistic viewing). They then judged fruit content for these six advertised products, plus a matched set of six for which ads were not shown. Controls saw toy ads on TV, and then judged the same 12 products. In session 3, subjects in each group saw the same ads they had seen in Session 2, without the program and with instruction to attend very carefully to messages in the ad (intensive viewing). They then judged all 12 products again. After naturalistic viewing, few significant differential changes from baseline were found. But after intensive viewing, accuracy of judgment of advertised artificial fruit products was lower than baseline among experimental group children. By contrast, accuracy was higher than baseline both for control children's judgements of “advertised” prod-     

A Focus for Public School Guidance Programs: A Model and Proposal

This article represents an attempt to provide an adequate theoretical basis for the development of guidance programs. Three important questions essential to any planning of guidance programs are discussed: (1) scope of responsibility, (2) developmental timing, and (3) focus of guidance activity. A model is proposed in an attempt to conceptualize the relationship between these three important questions of emphasis. The basic problem of the purpose of guidance programs is discussed, and a proposal relevant to the model and the assumed purposes is made. The proposed objective focuses on the environment of the learner, in an effort to prepare him to actively and effectively appropriate and apply new knowledge and skills. The implications that such an objective has for the role of the guidance specialist, as well as for education in general, are discussed.     

Reminiscence as Continuity: Comparison of Young and Older Adults

This study empirically investigates key propositions of a continuity theory approach to reminiscence. According to continuity theory, individuals seek familiarity in the face of uncertainty or impending change, which can accompany the aging process. The reminiscence behavior of young (n = 43) and older (n = 47) adults was compared to ascertain whether significant differences would emerge between the two populations concerning how often they reminisce and their use of reminiscence during transitional periods. Also of interest were differences in potential links between the content of reminiscence episodes and postreminiscence affect. Young adults in this sample reminisced significantly more frequently than older adults and were more likely to reminisce during times of change than were older adults. In addition, there was a direct relationship between the content of reminiscence episodes and postreminiscence affect, with older adults reporting greater emotional satisfaction after recalling the past than did younger adults. Findings lend support to continuity theory: Reminiscence occurs throughout the life span and should not be conceptualized as occurring most frequently in old age.     

Marital Status and Sex: Impact on Career Self-Efficacy

Bandura's (1977, 1986) self-efficacy theory served as the theoretical framework for examining the preferences of 214 individuals for either traditionally male or traditionally female occupations. An interaction between sex and marital status was found with regard to efficacy for traditionally female occupations. Married women scored higher than did married men, and unmarried women scored higher than did unmarried men for the traditionally female occupations. No difference between married and unmarried men or between married and unmarried women was indicated for the traditionally female occupations. A significannt main effect of sex, with men scoring higher than women, was found for both the traditionally male and traditionallyfemale occupations. Implications for further research as well as for career counseling and development are discussed.