An evaluation of exact methods for the multiple subset maximum cardinality selection problem

The maximum cardinality subset selection problem requires finding the largest possible subset from a set of objects, such that one or more conditions are satisfied. An important extension of this problem is to extract multiple subsets, where the addition of one more object to a larger subset would always be preferred to increases in the size of one or more smaller subsets. We refer to this as the multiple subset maximum cardinality selection problem (MSMCSP). A recently published branch‐and‐bound algorithm solves the MSMCSP as a partitioning problem. Unfortunately, the computational requirement associated with the algorithm is often enormous, thus rendering the method infeasible from a practical standpoint. In this paper, we present an alternative approach that successively solves a series of binary integer linear programs to obtain a globally optimal solution to the MSMCSP. Computational comparisons of the methods using published similarity data for 45 food items reveal that the proposed sequential method is computationally far more efficient than the branch‐and‐bound approach.     

Psychometric Evaluation of the Italian Adaptation of the Test of Inferential and Creative Thinking

This article describes the psychometric properties of the Italian adaptation of the Analyse des Schlussfolgernden und Kreativen Denkens (ASK; Test of Inferential and Creative Thinking) for measuring inferential and creative thinking. The study aimed to (a) supply evidence for the factorial structure of the instrument, (b) describe its reliability in terms of internal consistency, and (c) explore its convergent and discriminant validity. The examinees were 284 high school students and adult graduates. Both exploratory and confirmatory factor analyses were used to examine the dimensional structure. The 2-factor model provided an acceptable fit for the empirical data. As expected, stronger correlations were found among the subscales within the same construct domains compared to correlations among the subscales from the different construct domains. The psychometric qualities of the ASK appeared fairly good, thereby suggesting that it might be helpful in several application fields, including academic and professional guidance, human resource selections, and job placement.     

Testing Mean Differences among Groups: Multivariate and Repeated Measures Analysis with Minimal Assumptions

To date, there is a lack of satisfactory inferential techniques for the analysis of multivariate data in factorial designs, when only minimal assumptions on the data can be made. Presently available methods are limited to very particular study designs or assume either multivariate normality or equal covariance matrices across groups, or they do not allow for an assessment of the interaction effects across within-subjects and between-subjects variables. We propose and methodologically validate a parametric bootstrap approach that does not suffer from any of the above limitations, and thus provides a rather general and comprehensive methodological route to inference for multivariate and repeated measures data. As an example application, we consider data from two different Alzheimer’s disease (AD) examination modalities that may be used for precise and early diagnosis, namely, single-photon emission computed tomography (SPECT) and electroencephalogram (EEG). These data violate the assumptions of classical multivariate methods, and indeed classical methods would not have yielded the same conclusions with regards to some of the factors involved.     

Von der Natur Eines Philosophischen Problems

Ohne Zusammenfassung     

Beiträge zur Psychologie der Gestalt

Ohne ZusammenfassungNr. I–IV dieser Beiträge sind in Buchform, Leipzig 1919, und früher in der Zeitschr. f. Psychol. 67, 72, 73, 82. 1913–19 erschienen (vgl. das Literaturverzeichnis am Ende dieser Arbeit).     

Logische analyse des Wahrscheinlichkeitsbegriffs

Ohne Zusammenfassung     

Eins-und Vieles-Problem in biologischer Betrachtung

Ohne Zusammenfassung     

A relational differential outcomes effect: pigeons can classify outcomes as “good” and “better”

In a conditional discrimination each of two sample stimuli indicates which of two comparison stimuli is correct. When correct choice following each conditional stimulus is followed by a different outcome (one kind of food following one, a different kind of food following the other) it often facilitates acquisition and improves memory. In transfer designs, in which two different conditional discriminations are followed by the same two differential outcomes, outcome expectation can be shown to be sufficient for comparison choice. That is, the samples from one conditional discrimination are matched to comparisons from the other conditional discrimination based on the common outcomes alone. In the present study we asked if for pigeons the relative value of the differential outcomes (higher versus lower value) can serve as the basis for comparison choice, independent of other characteristics of the outcomes and of differential sample responding. That is, would different outcomes that could be described as “good” and “better” form two stimulus classes. For one conditional discrimination, the differential outcomes involved differential probability of reinforcement for choice of the correct comparison stimulus (0.80 vs. 0.20 for correct choice of the two comparisons, respectively). For the other conditional discrimination, the differential outcomes involved differential responding to the two comparison stimuli (5 pecks vs. 20 pecks to the correct comparisons, respectively). On test trials, when conditional stimuli from the two conditional discriminations were interchanged and the relative value of the differential outcomes could serve as the only basis for comparison choice, we found positive transfer. The results indicate that relational attributes of outcomes can serve as effective cues for comparison choice.     

The Nature of <Emphasis Type="Italic">Stimmungen</Emphasis>

This essay comprises two chapters from the first part of Bollnow’s book on moods (Das Wesen der Stimmungen), namely the second chapter on the concept of Stimmung and the third chapter on Stimmungen as the sustaining foundation of the soul. It argues that moods constitute the simplest and most original form in which human life comes to know itself. Moods are understood as a specific harmony between, first, the inner and outer world; second, the states of the body and the soul; and, third, the individual faculties of the soul. Moods differ from emotions in the narrow sense, which are always intentionally directed towards a specific object, whereas moods do not have any specific object; they are states of being, structuring and coloring human existence as a whole. Hence, no system of moods is provided, but their extensive diversity is indicated. Furthermore, transient, unsteady, or “moody” moods (Launen) are distinguished from persistent or basic moods (beständige Lebensstimmungen).