A new method for calibrating perceptual salience across dimensions in infants: the case of color vs. luminance

We report a new method for calibrating differences in perceptual salience across feature dimensions, in infants. The problem of inter-dimensional salience arises in many areas of infant studies, but a general method for addressing the problem has not previously been described. Our method is based on a preferential looking paradigm, adapted to determine the relative salience of two stimuli. We report here on the case of stimuli differing in color and luminance, though the method has wider potential. We were able to determine on a psychophysical curve the point at which a color contrast was equally salient to infants as a given luminance contrast. We then used these calibrated, 'iso-salient' stimuli in an object memory study. Results showed that 6.5-month-old infants noticed a color, but not a luminance, change while tracking an occluded object. Our method should have numerous applications in the study of bottom-up effects on infant attention and visual working memory.     

Practical Wisdom: On Theological Teaching and Learning – Edited by Malcolm L. Warford

Books reviewed: Practical Wisdom: On Theological Teaching and Learning. Edited by Malcolm L. Warford. New York, N.Y.: Peter Lang Publishing, Inc., 2004. xiv + 283 pages. ISBN 0‐8204‐7263‐8.     

Job search self-efficacy: Reconceptualizing the construct and its measurement

Job search self-efficacy (JSSE) is one of the most studied variables in the job search literature and an important component of the theory of planned behavior and self-regulation theory which have both been used to explain the job search process. However, even though JSSE has been a part of job search research for thirty years, the measurement of JSSE has varied from study to study. This questions both the validity of the measures used and the findings from each study that used a different measure. In this paper, we propose and test a two dimensional measure of JSSE that corresponds to job search behavior (JSSE-B) and job search outcomes (JSSE-O). The results of a longitudinal study of employed and unemployed job seekers support a two-factor model corresponding to the two dimensions of JSSE. We also found differential relationships between each dimension of JSSE and several antecedents and consequences. Among the antecedents, environmental exploration and self-exploration were stronger predictors of JSSE-B while career planning was a stronger predictor of JSSE-O. In terms of consequences, JSSE-B was a stronger predictor of job search intention and behavior while JSSE-O was a stronger predictor of the number of job offers received. These findings provide support for two dimensions of JSSE and have important implications for job search research and practice.     

Ideological Beliefs About Family Practices: Contemporary Perspectives Among North Indian Families

Ninety-two dual-wage and 103 single-wage Indian families with a preschool-age child residing in extended and nuclear households provided assessments regarding their beliefs about the division of household chores, financial responsibilities, childcare, and filial obligations. Analysis focused on possible differences in belief structures that may be attributed to the gender of the parent, family structural living arrangement, and maternal employment outside of the home. Husbands and wives did not differ in ideological beliefs on any of the components assessed, but differences did emerge as a function of family structural arrangements and whether or not the wife worked outside of the home. Data are discussed in terms of possible changes in ideological beliefs about family functions and practices and the broader socio-cultural factors operating within Indian society.     

A comparison of multiple versus single examples of the correct stimulus on task acquisition and generalization by persons with developmental disabilities

In teaching discriminations to persons with retardation, we often presume we will improve acquisition and generalization if we use multiple examples of boththe correct and incorrect stimuli. Two experiments were conducted to test this hypothesis. In the first experiment, 7 persons with moderate retardation learned to discriminate between functional words under two conditions. In one condition, Multiple Example of S- Only,1 example of the correct stimulus (S+) and 10 examples of the incorrect stimulus (S-) were used during acquisition. In the other condition, Multiple Examples of S+ and S-,10 examples of the S+ and 10 examples of the S- were used. Results showed that the condition which presented only a single example of S+ was superior 16 times and inferior 4 times during acquisition, generalization, and maintenance. A second experiment was conducted to (a) replicate the methodology and procedures in Experiment 1 with different participants, (b) determine whether the results were replicable, and (c) obtain efficiency data. Results replicated the findings of the first experiment. The condition which presented only a single example of S+ was superior on measures of (a) trials to criterion, (b) percent correct during acquisition, and (c) minutes to criterion. On measures of generalization, the two conditions were relatively equal. Thus, the condition which presented only a single example of the correct stimulus was more efficient and was just as effective in generalization as the condition which presented multiple examples of both the S+ and S-. These surprising results were discussed in terms of stimulus control, why students performed just as well during generalization when only one example of the S+ was used, why acquisition was also poorer for this condition, and how future studies might address these points.     

On the validity of scalp recordings of the auditory evoked potential

Simultaneous recording from scalp and cortical electrodes in unanesthetized and unrestrained cats revealed essentially no differences between the superficial and deep recordings of the auditory evoked responses. Human recordings taken under two conditions of muscular contraction contained no major differences from 30 to 300 msec after stimulus onset.     

Student Political Campaigners: Who Campaigns and What Effect Does It Have on Them?

What characterizes students who become involved in political campaigns and what effects does their campaigning have on them? During a 2-week election recess, about one-third of the students at Princeton University chose to campaign. Those students who did so were liberal rather than radical in their political orientation. Those who participated seemed predisposed to campaign because they thought campaigning was an effective way of bringing about the changes that they sought. Campaigners were more likely than their fellow students to have engaged in political activity before. Such efforts may be evidence of their beliefs that political activity causes change, or might have been the forming experience for those beliefs. If the candidate for whom the student campaigned won the election, the student by and large strengthened or maintained his original attitudes about the efficacy of campaigning. If his candidate lost, the student became more pessimistic about the efficacy of campaigners whose candidates won also changed in an internal direction on a personal-control subscale of Rotter's (1966) internal-external scale; those whose candidates lost tended to change in an external direction.