Graph-theoretic representations for proximity matrices through strongly-anti-Robinson or circular strongly-anti-Robinson matrices

There are various optimization strategies for approximating, through the minimization of a least-squares loss function, a given symmetric proximity matrix by a sum of matrices each subject to some collection of order constraints on its entries. We extend these approaches to include components in the approximating sum that satisfy what are called the strongly-anti-Robinson (SAR) or circular strongly-anti-Robinson (CSAR) restrictions. A matrix that is SAR or CSAR is representable by a particular graph-theoretic structure, where each matrix entry is reproducible from certain minimum path lengths in the graph. One published proximity matrix is used extensively to illustrate the types of approximation that ensue when the SAR or CSAR constraints are imposed.The authors are indebted to Boris Mirkin who first noted in a personal communication to one of us (LH, April 22, 1996) that the optimization method for fitting anti-Robinson matrices in Hubert and Arabie (1994) should be extendable to the fitting of strongly anti-Robinson matrices as well.     

Highway bridges and feasts: Heidegger and Borgmann on how to affirm technology

Borgmann's views seem to clarify and elaborate Heidegger's. Both thinkers understand technology as a way of coping with people and things that reveals them, viz. makes them intelligible. Both thinkers also claim that technological coping could devastate not only our environment and communal ties but more importantly the historical, world-opening being that has defined Westerners since the Greeks. Both think that this devastation can be prevented by attending to the practices for coping with simple things like family meals and footbridges. But, contrary to Borgmann, Heidegger claims further that, alongside simple things, we can affirm technological things such as autobahn bridges. For Borgmann, technological coping produces things like central heating that are so dispersed they inhibit skillful interaction with them and therefore prevent our being sensitive to ourselves as world-disclosers. For Heidegger, so long as we can still relate to non-technological things, we can affirm relations with technological things because we can maintain both our technological and the non-technological ways of world-disclosing. So Borgmann sees revealing as primarily directed to things while Heidegger sees it as directed to worlds. If Heidegger is right about us, we have more leeway to save ourselves from technological devastation than Borgmann sees.     

A test of the generalizability of a recently suggested conceptual model for assessment center ratings

The present study replicated and extended research concerning a recently suggested conceptual model of the underlying factors of dimension ratings in assessment centers (ACs) proposed by Hoffman, Melchers, Blair, Kleinmann, and Ladd that includes broad dimension factors, exercise factors, and a general performance factor. We evaluated the criterion-related validity of these different components and expanded their nomological network. Results showed that all components (i.e., broad dimensions, exercises, general performance) were significant predictors of training performance. Furthermore, broad dimensions showed incremental validity beyond exercises and general performance. Finally, relationships between the AC factors and individual difference constructs (e.g., Big Five, core self-evaluations, positive and negative affectivity) supported the construct-related validity of broad dimensions and provided further insights in the nature of the different AC components.     

Behavioural evidence for sex differences in the overlap between subtraction and multiplication

The present study aims to identify factors that may influence the dissociability of number magnitude processing and arithmetic fact retrieval at the behavioural level. To that end, we assessed both subtraction and multiplication performance in a within-subject approach and evaluated the interdependence of unit-decade integration measures on the one hand as well as sex differences in the interdependence of performance measures on the other hand. We found that subtraction items requiring borrowing (e.g. 53–29 = 24, 3 < 9) are more error prone than subtraction items not requiring borrowing (e.g. 59–23 = 34, 9 > 3), thereby demonstrating a borrowing effect, which has been suggested as a measure of unit-decade integration in subtraction. Furthermore, we observed that multiplication items with decade-consistent distractors (e.g. 6 × 4 = 28 instead of 24) are more error prone that multiplication items with decade-inconsistent distractors (e.g. 6 × 4 = 30 instead of 24), thereby demonstrating a decade-consistency effect, which has been suggested as a measure of unit-decade integration in simple multiplication. However, the borrowing effect in subtraction was not correlated with the effect of decade consistency in simple multiplication in either men or women. This indicates that unit-decade integration arises from different systems in subtraction and multiplication. Nevertheless, men outperformed women not only in subtraction, but also in multiplication. Furthermore, subtraction and multiplication performance on correct solution probes were correlated in women, but unrelated in men. Thus, the view of differential systems for number magnitude processing and arithmetic fact retrieval may not be universal across sexes.     

MMPI-2 and MCMI-III scores among dutch inpatient substance abusers: Assessing correspondence and cross-cultural equivalence

The Millon Clinical Multiaxial Inventory (MCMI-II and MCMI-III) and the Minnesota Multiphasic Personality Inventory (MMPI-2) were applied to 263 Dutch inpatient substance abusers with multiple psychiatric diagnoses, and the results compared with those of 306 North-American substance abusers studied by Ward (1995). We looked for structural similarity both across groups (per instrument) and across the two instruments (per sample), using principal components analysis and congruence analysis. The component structure found by Ward was partly replicated in the Dutch group, thus cross-validating the use of the two instruments with these patients. Moreover, as found by Ward, the MMPI-2 content and supplementary scales of the Dutch sample proved to be important determinants of the first three MMPI-2 components, adding to convergent validity. Questions remained about the influence of the (dis)continuity of MCMI-II and MCMI-III on the replicability of the MCMI components.     

Job Type and Recruiters' Inferences of Applicant Personality Drawn from Resume Biodata: Their Relationships with Hiring Recommendations

Using data collected from 244 recruiters who reviewed resumes and made dispositional inferences and hiring recommendations for 122 entry‐level job applicants, we found that type of job opening (Holland's Conventional vs. Enterprising jobs) moderated relationships between recruiter inferences of applicant personality traits and recruiter judgments of applicant employability. Results showed Conscientiousness correlated with employability ratings for Conventional jobs (e.g., accounting) while extraversion was most associated with employability ratings for Enterprising jobs (e.g., marketing).     

Returning to the present moment: Thinking about one’s childhood increases focus on the hedonistic present

Children seem to live more in the present moment than adults. But is it possible to make the present time perspective more available among adults? Four experiments demonstrated that activating childhood selves can lead adults to be more embedded in the hedonistic present. Studies 1 and 2 showed that recalling memories from childhood, either in an open-ended or a structured form, increased participants’ focus on the hedonistic present. Study 3 showed that this effect also occurred after an implicit childhood manipulation. Study 4 revealed that taking the perspective of a child significantly increased orientation to the hedonistic present, compared to taking the perspective of an adult. The effects of activation of childhood selves were not mediated by mood, nostalgia, impatience, concentration, difficulty of the task, enjoyment connected with the task, or involvement in the task. Evaluation of one’s childhood and tendency to relive childhood memories did not affect the results.     

Conspiracy stereotyping and perceptions of group entitativity of Jews, Germans, Arabs and homosexuals by Polish students

The relationship among conspiracy stereotypes and perceived entitativity (the degree to which a collection of persons are perceived as being bonded together in a homogeneous entity) of Jews, Germans, Arabs, and homosexuals was examined. 63 volunteer university students answered the Conspiracy Beliefs Scale and the Group Entitativity Scale. The conspiracy stereotypes of all the categories were positively correlated with scores for perceived entitativity. The perception of entitativity seems to be an important factor in conspiracy stereotyping and therefore in intergroup relations.     

Order-Constrained Solutions in <Emphasis Type="Italic">K</Emphasis>-Means Clustering: Even Better Than Being Globally Optimal

This paper proposes an order-constrained K-means cluster analysis strategy, and implements that strategy through an auxiliary quadratic assignment optimization heuristic that identifies an initial object order. A subsequent dynamic programming recursion is applied to optimally subdivide the object set subject to the order constraint. We show that although the usual K-means sum-of-squared-error criterion is not guaranteed to be minimal, a true underlying cluster structure may be more accurately recovered. Also, substantive interpretability seems generally improved when constrained solutions are considered. We illustrate the procedure with several data sets from the literature.     

Re-conceptualizing the past: Historical data in vocational interest research

Noteworthy progress has been made in the development of statistical models for evaluating the structure of vocational interests over the past three decades. It is proposed that historically significant interest datasets, when combined with modern structural methods of data analysis, provide an opportunity to re-examine the underlying assumptions of J.L. Holland’s [Holland, J. L. (1959). A theory of vocational choice. Journal of Counseling Psychology, 6, 35–45; Holland, J. L. (1997). Making vocational choices (3rd ed.). Odessa, FL: Psychological Assessment Resources] RIASEC model. To illustrate this potential, data obtained from J. P. Guilford’s study of interest structure were re-analyzed using modern circumplex and hierarchical clustering techniques to evaluate Holland’s and I. Gati’s [Gati, I. (1979). A hierarchical model for the structure of interests. Journal of Vocational Behavior, 15, 90–106; Gati, I. (1991). The structure of vocational interests. Psychological Bulletin, 109, 309–324] interest structures. Obtained results indicate that a circumplex model can be used to effectively represent the structure underlying Guilford’s interest measures. However, hierarchical clustering results suggest that Holland’s RIASEC types may not be the most effective categories for grouping specific interest measures into broader interest areas. The current findings provide support for the continued investigation of alternatives to Holland’s interest categories using modern measures of basic interests.