We argue that additional understanding of work motivation can be gained by incorporating current insights concerning self-categorization and social identity processes and by examining the way in which these processes influence the motivation and behavior of individuals and groups at work. This theoretical perspective that focuses on the conditions determining different self-definitions allows us to show how individual and group processes interact to determine work motivation. To illustrate the added value of this approach, we develop some specific propositions concerning motivational processes underpinning leadership and group performance.

We argue that additional understanding of work motivation can be gained by incorporating current insights concerning self-categorization and social identity processes and by examining the way in which these processes influence the motivation and behavior of individuals and groups at work. This theoretical perspective that focuses on the conditions determining different self-definitions allows us to show how individual and group processes interact to determine work motivation. To illustrate the added value of this approach, we develop some specific propositions concerning motivational processes underpinning leadership and group performance.

We examined possible explanations for the underrepresentation of women among university faculty, in two different national contexts. In the Netherlands, a sample of doctoral students (N = 132) revealed no gender differences in work commitment or work satisfaction. Faculty members in the same university (N = 179), however, perceived female students to be less committed to their work and female faculty endorsed these gender-stereotypical perceptions most strongly. A second study, in Italy, replicated and extended these findings. Again, no gender differences were obtained in the self-descriptions of male and female doctoral students (N = 80), while especially the female faculty (N = 93) perceived female students as less committed to their work than male students. Additional measures supported an explanation in social identity terms, according to which individual upward mobility (i.e. of female faculty) implies distancing the self from the group stereotype which not only involves perceiving the self as a non-prototypical group member, but may also elicit stereotypical views of other in-group members.'Women in science: why so few?' was the title under which, in 1965, Alice Rossi addressed the relative absence of women who pursued academic careers at the university. Today, over 35 years later, we can still pose that same question. The pervasiveness of this phenomenon is illustrated by data showing that the current proportion of female faculty in universities across the world almost never exceeds 25%

Among a representative sample of the Dutch population (Study 1: N = 690), careeroriented and team-oriented commitment were assessed, in addition to affective organizational commitment (Meyer & Allen, 1991). Confirmatory factor analysis supported the proposed distinction between the 2 specific forms of commitment at the measurement level. Furthermore, the construct validity of team-oriented and career-oriented commitment as well as their differential implications were corroborated by self-reports of workrelated behavior 1 year later. The distinction between career-oriented and team-oriented commitment was then cross-validated in a 2nd study, among employees of a financial service organization in Belgium (TV = 287), in which the constructs proved to be not only differentially related to self-reported behavior at work, but also predictive of performance ratings by superiors.The aim of the present study was to develop and validate a measure to distinguish career-oriented from teamoriented work commitment. We intended to examine whether these specific forms of commitment could be distinguished from each other at the measurement level and to investigate whether they were differentially related to self-reported as well as externally assessed indexes of work-related behavior. We first present results from a representative sample of the Dutch working population, relating measures of commitment taken at Time 1 to selfreported behavior at Time 2 (Study 1). Subsequently, we cross-validated and extended our findings by examining whether similar results would be obtained when self-reported commitment scores were related to external assessments of performance, with an independent sample consisting of employees of a financial service organization in Belgium (Study 2).In organizational theory and research, attempts to predict the behavior of individual workers in organizations have focused on organizational commitment as a crucial

ABSTRACT. One of the new ways used by companies to demonstrate their social responsibility is to encourage employee volunteering, whereby employees engage in socially beneficial activities on company time, while being paid by the company. The reasoning is that it is good for employee motivation (internal effects) and good for the company reputation (external effects). This article reports an empirical investigation of the internal effects of employee volunteering conducted amongst employees of the Dutch ABN-AMRO bank. The study showed that (a) socio-demographic characteristics from employee volunteers markedly differ from those of non-volunteers and community volunteers and (b) employee volunteering seems to have positive effects on attitudes and behavior towards the organization.KEY WORDS: Employee volunteering, corporate social responsibility, effects on attitude and behavior, volunteering and socio-demographic characteristics ABBREVIATIONS: OCB Organizational citizenship behavior.