FORMAL OPERATIONAL THINKING IN YOUNG ADULTS AS A FUNCTION OF EDUCATION AND SEX*

The integration of formal operations in a lattice–INRC group structure was tested in young adults. For this purpose the equilibrium in balance, the combination of liquids and the conservation of motion tasks were employed. To test the possibility of differential integration because of differences in developmental history, the factors of education and sex were manipulated systematically. Thus, four groups were constituted of educated males, educated females, uneducated males, and uneducated females, forming a total of 40 subjects. The results revealed a consistent patterning of performance on the three tasks across groups and across subjects which is in disagreement with the Piagetian model. Education and sex were important factors in respect to formal thought attainment. A theory of formal thought spheres is formulated to account for the patterning obtained and the implications for further research discussed.     

The Importance of Behavioural and Situational Characteristics for Entrepreneurial Success: An International Rating Study

A judgemental analysis has been executed of the job of entrepreneur in terms of the required behavioural, or ‘human’, attributes and in terms of the relevance of ‘situational’ attributes for entrepreneurial success. Ratings were given by 235 consultants and starting entrepreneurs from five European countries. By means of generalizability analysis it was investigated whether ratings generalized across countries: Nationality barely had an influence on the ratings. Next, it was questioned whether the type of judge, i.e. consultants or starting entrepreneurs, made a difference. No difference was found for the situational attributes. However, the behavioural attributes as a whole were judged to be more important by starters than by consultants. In general, it was not so much the type or nationality of the judge, as individual differences between judges that had an effect on the ratings. Overall, consensus was higher among consultants than among starting entrepreneurs, and higher on the importance of the situational than of the behavioural attributes. The three situational attributes judged as most important were: Number of Clients, Type of Product, and Competition. The three most important behavioural attributes were judged to be Market Orientedness, Perseverance, and Independence (consultants), and Perseverence, Independence, and Financial Control (starters).     

Psychophysical features of the transition from pure heat perception to heat pain perception

The psychophysical features of the transition from the pure heat to the heat pain range were studied in 25 healthy subjects (mean age 28.8 years). Thirty short heat stimuli from ?1.6° C to + 1.6° C relative to the pain threshold were applied to the thenar of the left hand with an apparatus containing a Peltier thermode (nine different temperatures at 0.4°C intervals). The subjects rated the sensation intensity on a visual analogue scale. The resulting stimulus/sensation intensity relations could be explained equally well (same goodness of fit) by a model with a power function (PF) and by a model with two linear regression lines (TLR), one for stimulus intensities below and one for those above the pain threshold and intersecting at the pain threshold. The slopes of the TLR model were significantly larger above the pain threshold than below it. The PF model produced exponents between 1.8 and 1.9. We conclude that to describe the transition area, it is sufficient to use simple linear models for both the pure heat and the heat pain ranges.     

Modern Essentialism and the problem of individuation of spacetime points

In this paper Modern Essentialism is used to solve a problem of individuation of spacetime points in General Relativity that has been raised by a New Leibnizian Argument against spacetime substantivalism, elaborated by Earman and Norton. An earlier essentialistic solution, proposed by Maudlin, is criticized as being against both the spirit of metrical essentialism and the fundamental principles of General Relativity. I argue for a modified essentialistic account of spacetime points that avoids those obstacles.     

Assessment Center Procedures: Cognitive Load During the Observation Phase

This study explores the traditional procedure of observing assessment center exercises while taking notes vs. an alternative procedure where assessors merely observe and postpone note‐taking until immediately after the exercise. The first procedure is considered to be cognitively demanding due to the requirement of simultaneous note‐taking and observing. Also, dual task processing (concurrent observing and note‐taking) is considered to be especially demanding for assessors without rating experience. The procedures are evaluated using a 2 × 2 design (with note‐taking/without note‐taking × experienced/inexperienced). Some 121 experienced and inexperienced assessors rated videotaped candidates, observing either with or without taking notes. Results showed that experienced assessors yield significantly higher differential accuracy than inexperienced assessors. We did not find an effect of observation procedure on accuracy, interrater reliability or halo. Implications for future research are described.     

The dissemination of critical,unshared information in decision‐making groups: the effects of pre‐discussion dissent

Previous research in group decision making has found that in situations of a hidden profile (i.e. the best choice alternative is hidden from individual members as they consider their pre‐discussion information), unshared information is disproportionately neglected and sub‐optimal group choices are highly likely. In an experimental study, three‐person groups decided which of three candidates to select for a professorial appointment. We hypothesised that minority dissent in pre‐discussion preferences improves the consideration of unshared information in groups and increases the discovery rate of hidden profiles. As predicted, consideration of unshared information increased with minority dissent. The expectation of an improvement of group decision quality was partially supported. In diversity groups (i.e. each member prefers a different alternative) consideration of unshared information and group decision quality was significantly higher than in simple minority groups. Results are discussed in the light of theories of minority influence. The benefits of using the hidden profile paradigm with minority and diversity groups for theory development in the area of group decision making are highlighted. Copyright © 2002 John Wiley & Sons, Ltd.