Abstract
Prozesse des computervermittelten Wissensaustauschs ermöglichen Gruppen den Aufbau eines Wissenspools, den alle Gruppenmitglieder nutzen können. Während die Vorzüge dieses Wissensaustauschs unmittelbar einsichtig sind, ist aus psychologischer Sicht zu konstatieren, dass der Aufbau solcher Wissenspools als Soziales Dilemma aufgefasst werden kann. Dieser Überblickartikel thematisiert den computervermittelten Wissensaustausch auf Basis der experimentellen Forschung zu Sozialen Dilemmata, und stellt Experimentalumgebungen vor, die dieses Informationsaustausch-Dilemma operationalisieren und seine empirische Untersuchung ermöglichen. Zunächst werden Ergebnisse zur subjektiven Wahrnehmung des Dilemmas berichtet, dann Befunde zu strukturellen und psychologischen Einflussfaktoren. Erstere verändern die Payoff-Struktur (Kosten und Nutzen der Informationsweitergabe), letztere die erlebte soziale Situation. Hier spielen präskriptive und deskriptive Normen, die Identifizierbarkeit des Verhaltens oder die Anonymität der Person eine Rolle. Darüber hinaus werden Befunde zum Einfluss einer Reihe von Persönlichkeitsvariablen vorgestellt. Die Befunde werden in einer integrativen Darstellung zusammengefasst und kritisch bewertet.
Processes of computer-mediated knowledge make it possible for groups to build a knowledge pool that can be used by all group members. While the advantages of this knowledge exchange are evident, it needs to be acknowledged that, from a psychological point of view, building such knowledge pools may be considered a social dilemma. This review article addresses computer-mediated knowledge exchange on the basis of experimental social dilemma research and presents experimental environments which have operationalized this information exchange dilemma, making empirical studies possible. It presents results on the subjective perception of the dilemma, followed by findings on structural and psychological factors by which it is influenced. While the former change the payoff structure (cost and benefit of passing on information), the latter change the perceived social situation. Prescriptive and descriptive norms, identifiability of one’s own behavior and a person’s anonymity play a role here. In addition, the article deals with some results on the role of several variables concerning personality traits. It summarizes the findings in an integrative description and reviews them critically.
Literatur
(2003). Motivation and barriers to participation in virtual knowledge-sharing communities of practice. Journal of Knowledge Management , 7, 64–77.
(2003). Transitioning from studying examples to solving problems: Effects of self-explanation prompts and fading worked-out steps. Journal of Educational Psychology , 95, 774–783.
(2009). Social value orientation and cooperation in social dilemmas: A meta-analysis. Group Processes Intergroup Relations , 12, 533–547.
(1982). Rational man and irrational society . Beverly Hills, CA: Sage.
(2011). Momentan verfügbare Selbstkontrollkraft: Vorstellung eines Messinstruments und erste Befunde aus pädagogisch-psychologischen Kontexten. Zeitschrift für Pädagogische Psychologie , 25, 185–196.
(2009). Förderung des induktiven Denkens im Klassenzimmer. Zeitschrift für Pädagogische Psychologie , 23, 279–283.
(2011). Group awareness in CSCL environments. Computers in Human Behavior , 27, 1043–1045.
(1998). Dictator game giving: Rules of fairness versus acts of kindness. International Journal of Game Theory , 27, 269–299.
(1992). Communication networks and collective action. In W. B. G. Liebrand, D. M. Messick & H. A. M. Wilke (Eds.), Social dilemmas: Theoretical issues and research findings (pp. 225–245).Oxford: Pergamon Press.
(2002). Locus of control and learning to cooperate in a prisoner's dilemma game. Personality and Individual Differences , 32, 929–946.
(1999). The impact of personality on behavior in five prisoner's dilemma games. Journal of Economic Psychology , 20, 343–377.
(2002). Knowledge-sharing dilemmas Organization Studies , 23, 687–710.
(2003). Notification and awareness: Synchronizing task-oriented collaborative activity. International Journal of Human-Computer Studies , 58, 605–632.
(2011). Sustaining cooperation in laboratory public goods experiments: A selective survey of the literature. Experimental Economics , 14, 47–83.
(1991). Grounding in communication. In R. M. Levine, L. B. Resnick, & S. D. Teasley (Eds.), Perspectives on socially shared cognition (pp. 127–149). Washington, DC: American Psychological Association.
(2003). Cooperation, psychological game theory, and limitations of rationality in social interaction. Behavioral and Brain Sciences , 26, 139–153.
(1992). Discretionary databases as social dilemmas. In W. B. G. Liebrand, D. M. Messick & H. A. M. Wilke (Eds.), Social dilemmas: Theoretical issues and research findings (pp. 199–208). Oxford: Pergamon Press.
(1988). From catalog to classification: Murray's needs and the five factor model. Journal of Personality and Social Psychology , 55, 258–265.
(1992). Revised NEO Personality Inventory (NEO-PI-R) and NEO Five Factor Inventory (NEO-FFI) professional manual . Odessa, FL: Psychological Assessment Resources.
(2005). Ambivalent effect of member portraits in virtual groups. Journal of Computer Assisted Learning , 21, 281–291.
(2003). Wissensaustausch mittels Datenbanken als Öffentliches-Gut-Dilemma: Die Wirkung von Rückmeldungen und Belohnungen. Zeitschrift für Psychologie , 211, 75–85.
(2007). Improving quality and quantity of contributions: Two models for promoting knowledge exchange with shared databases. Computers & Education , 49, 423–440.
(2007). Guidelines and feedback in information-exchange: The impact of behavioral anchors and descriptive norms in a social dilemma. Group Dynamics: Theory, Research, and Practice , 11, 42–53.
(2008a). A systemic and cognitive view on collaborative knowledge building with wikis. International Journal of Computer-Supported Collaborative Learning , 3, 105–122.
(2008b). Endowment heterogeneity and identifiability in the information-exchange dilemma. Computers in Human Behavior , 24, 862–874.
(2006). Information exchange with shared databases as a social dilemma: The effect of metaknowledge, bonus systems, and costs. Communication Research , 33, 370–390.
(2009). Impact of temporal extension, synchronicity, and group size on computer-supported information exchange. Computers in Human Behavior , 25, 731–737.
(2006). Knowledge sharing and rewards: A game-theoretical perspective. Knowledge Management Research & Practice , 4, 283–292.
(1957). Psychological tests and personal decisions . Urbana: University of Illinois Press.
(2002). What is new media? Retrieved 21.05.2012 from www.sociology.org.uk/as4mm3a.doc
(2008). Public goods experiments. In S. N. Durlauf & L. E. Blume (Eds.), The new Palgrave dictionary of economics (2nd edition) Basingstoke, UK: Palgrave Macmillan.
(2011). Warum die durch die Schüler und Schülerinnen individuell und subjektiv erlebte Gerechtigkeit des Lehrerhandelns wichtig ist. Zeitschrift für Pädagogische Psychologie , 25, 5–18.
(1982). Self-monitoring and cooperation as a self-presentational strategy. Journal of Personality and Social Psychology , 42, 497–505.
(2000). Social dilemmas. International Journal of Psychology , 35, 111–116.
(2001). “The less I trust, the less I contribute (or not)?” The effects of trust, accountability and self-monitoring in social dilemmas. European Journal of Social Psychology , 31, 93–107.
(1949). A theory of cooperation and competition. Human Relations , 2, 129–152.
(1996). Altruism in anonymous dictator games. Games and Economic Behavior , 16, 181–191.
(2000). Cooperation and punishment in public goods experiments. American Economic Review , 90, 980–994.
(2002). Altruistic punishment in humans. Nature , 415, 137–140.
(1994). Fairness in simple bargaining experiments. Games and Economic Behavior , 6, 347–369.
(1988). Open-loop and closed-loop equilibria of dynamic games with many players. Journal of Economic Theory , 44, 227–256.
(1991). Global traits: A neo-Allportian approach to personality. Psychological Science , 2, 31–39.
(1999). Individual differences in social comparison: The development of a scale for social comparison orientation. Journal of Personality and Social Psychology , 76, 129–142.
(2005). Internet encyclopaedias go head to head. Nature , 438, 900–901.
(2010). Förderung der Schreibkompetenz bei Viertklässlern. Zeitschrift für Pädagogische Psychologie , 24, 177–190.
(2012). Risk is relative: Risk aversion yields cooperation rather than defection in cooperation-friendly environments. Psychonomic Bulletin & Review , 19, 546–553.
(2011). Leading with(out) sacrifice? A public-goods experiment with a privileged player. Economic Inquiry , 49, 591–597.
(2003). Präferenzkonsistenz und Geteiltheit von Informationen als Einflussfaktoren auf Informationsbewertung und intendiertes Diskussionsverhalten bei Gruppenentscheidungen. Zeitschrift für Sozialpsychologie , 34, 9–23.
(1990). Ultimatum bargaining behavior: A survey and comparison of experimental results. Journal of Economic Psychology , 11, 417–449.
(2004). Creation and recreation: Motivating collaboration to generate knowledge capital in online communities. International Journal of Information Management , 24, 235–246.
(2009). Die Vertrauens-Trias als personale Ressource für die Bewältigung von Prüfungsangst. Zeitschrift für Pädagogische Psychologie , 23, 19–30.
(1972). Public goods: The polar case. In R. M. Bird & J. G. Head (Eds.), Modern fiscal issues: Essays in honour of Carl S. Shoup (pp. 7–16). Toronto, Ontario: University of Toronto Press.
(1980). Lernmotivation im Unterricht, erneut betrachtet. Unterrichtswissenschaft , 8, 7–47.
(1991). Social comparisons and their affective consequences: The importance of comparison dimension and individual difference variables. Journal of Social and Clinical Psychology , 10, 372–394.
(1997). Struktur und Verlauf aktiver und passiver Partizipation beim netzbasierten Lernen. Unterrichtswissenschaft , 25, 34–55.
(2009). Pillars of cooperation: Honesty-Humility, social value orientations, and economic behavior. Journal of Research in Personality , 43, 516–519.
(2009). Extraversion, neuroticism, and the prisoner's dilemma. Personality and Individual Differences , 46, 254–256.
(2007). Knowledge sharing behavior in virtual communities: The relationship between trust, self-efficacy, and outcome expectations. International Journal of Human Computer Studies , 65, 153–169.
(1988). Group size effects in public goods provision: The voluntary contributions mechanism. Quarterly Journal of Economics , 103, 179–199.
(1984). Divergent evidence on free riding: An experimental examination of possible explanations. Public Choice , 43 113–149.
(1984). Task visibility, free riding, and shirking: Explaining the effect of structure and technology on employee behavior. Academy of Management Review , 9, 684–695.
(1989). Cooperation and competition: Theory and research . Edina, MN: Interaction Book Company.
(1992). Positive interdependence: Key to effective cooperation. In R. Hertz-Lazarowitz (Ed.), Interaction in cooperative groups: The anatomy of group learning (pp. 174–199). Cambridge: University Press.
(1994). Learning together and alone. Cooperative, competitive, and individualistic learning . Edina, MN: Interaction Book Company.
(2009). An educational psychology success story: Social interdependence theory and cooperative learning. Educational Researcher , 38, 366–367.
(1998). Cooperation in the classroom . Boston: Allyn and Bacon.
(1981). The effects of communication, resource feedback, and identifiability on behavior in a simulated commons. Journal of Experimental Social Psychology , 17, 373–385.
(2006). Predicting continued participation in newsgroups. Journal of Computer-Mediated Communication , 11, 723–747.
(2001). Kooperatives Lernen an der Hochschule: Evaluation des Gruppenpuzzles in Seminaren der Pädagogischen Psychologie. Zeitschrift für Pädagogische Psychologie , 15, 74–84.
(2000). A focus theory of normative conduct: When norms do and do not affect behavior. Personality and Social Psychology Bulletin , 26, 1002–1012.
(2002). Motivations to resolve communication dilemmas in database-mediated collaboration. Communication Research , 29, 125–154.
(1993). Social loafing: A meta-analytic review and theoretical integration. Journal of Personality and Social Psychology , 65, 681–706.
(1983). Motivation losses in small groups: A social dilemma analysis. Journal of Personality and Social Psychology , 45, 819–828.
(1995). Norms in social dilemmas. In D. A. Schroeder (Ed.), Social dilemmas. Perspectives on individuals and groups (pp. 31–47). Westport: Praeger.
(1999). Anonymity and social control in social dilemmas. In M. Foddy, M. Smithson, S. Schneider & M. Hogg (Eds.), Resolving social dilemmas: Dynamic, structural, and intergroup aspects (pp. 103–119). New York: Psychology Press.
(1999). Variable investment, the continuous prisoner's dilemma, and the origin of cooperation. Proceedings of the Royal Society B: Biological Sciences , 266, 1723–1728.
(1984). The free rider problem: Experimental evidence. Public Choice , 43, 3–24.
(2010). Supporting participation in organizational information exchange: Psychological recommendations. Development and Learning in Organizations , 24, 14–16.
(2008). Group awareness and self-presentation in computer-supported information exchange. International Journal of Computer-Supported Collaborative Learning , 3, 85–97.
(2009). Visualization of group members' participation: How information presentation formats support information exchange. Social Science Computer Review , 27, 243–261.
(in press). The impact of cognitive anchors on information-sharing behavior. Cyberpsychology, Behavior, and Social Networking.
(2007). An interactional perspective on group awareness: Alleviating the information-exchange dilemma (for everybody?). International Journal of Human-Computer Studies , 65, 899–910.
(2008). The social psychology of knowledge management. Team Performance Management , 14, 381–401.
(2011). Value of information, behavioral guidelines, and social value orientation in an information-exchange dilemma. Group Dynamics: Theory, Research, and Practice , 15, 173–186.
(1998). Social dilemmas: The anatomy of cooperation. Annual Review of Sociology , 24, 183–214.
(1985). Components of reward in social dilemmas. Journal of Personality and Social Psychology , 48, 364–373.
(1996). Social dilemmas . Boulder, CO: Westview Press.
(2004). Förderung des computerbasierten Wissenserwerbs durch kooperatives Lernen und eine Feedbackmaßnahme. Zeitschrift für Pädagogische Psychologie , 18, 125–136.
(2005). Fragen und Erklärungen beim kooperativen Lernen in Grundschulklassen. Zeitschrift für Entwicklungspsychologie und Pädagogische Psychologie , 37, 91–100.
(2011). Studienwahlmotivation und Persönlichkeitseigenschaften als Prädiktoren für Zufriedenheit und Strategienutzung im Lehramtsstudium. Zeitschrift für Pädagogische Psychologie , 25, 105–114.
(1986). Individual differences in social orientation.. In H. Wilke, D. Messick & C. Rutte (Eds.), Experimental social dilemmas (pp. 151–176). New York: Verlag Peter Lang.
(2001). Individual differences in cooperation in a circular public goods game. European Journal of Personality , 15, 37–52.
(2007). The role of status seeking in online communities: Giving the gift of experience. Journal of Computer-Mediated Communication , 12, 434–455.
(2007). Recalling shared vs. unshared information mentioned during group discussion: Toward understanding differential repetition rates. Group Processes and Intergroup Relations , 10, 311–322.
(1979). Many hands make light the work: The causes and consequences of social loafing. Journal of Personality and Social Psychology , 37, 822–832.
(2002). Self-Monitoring und Authentizität: Die verkannten Selbstdarsteller. Zeitschrift für Differentielle und Diagnostische Psychologie , 23, 129–148.
(2002). SIDE-VIEW: Evaluation of a system to develop team players and improve productivity in internet collaborative learning groups. British Journal of Educational Technology , 33, 53–63.
(2001). Knowing me, knowing you: Anonymity effects on social identity processes within groups. Personality and Social Psychology Bulletin , 27, 526–537.
(2007). Group cognition, membership change, and performance: Investigating the benefits and detriments of collective knowledge. Organizational Behavior and Human Decision Processes , 103, 159–178.
(1990). Why CSCW applications fail: Problems in the adoption of interdependent work tools. In CSCW '90, Proceedings of the Conference on Computer Supported Cooperative Work (pp. 371–380). Los Angeles: ACM Press.
(1991). Levels of analysis and personality: Lessons from the Person-Situation-Debate? Psychological Science , 2, 427–428.
(1981). Economists free ride, does anyone else? Journal of Public Economics , 15, 295–310.
(2012). Motivators and barriers for knowledge exchange in social information spaces. Manuscript submitted for publication.
(2010). Is it even worth it? The effect of loss prospects in the outcome distribution of a public goods dilemma. Organizational Behavior and Human Decision Processes , 111, 1–12.
(1978). Social values: Their definition, measurement, and development. Journal of Research and Development in Education , 12, 121–137.
(1983). Solving social dilemmas. In L. Wheeler & P. Shaver (Eds.), Review of Personality and Social Psychology (Vol. 4, pp. 11–44). Beverly Hills: Sage.
(2011). Defection in the dark? A randomized-response investigation of cooperativeness in social dilemma games. European Journal of Social Psychology , 41, 638–644.
(2009). Using wikis for organizational learning: Functional and psycho-social principles. Development and Learning in Organizations , 23, 21–24.
(2011). Measuring social value orientation. Judgment and Decision Making , 6, 771–781.
(1950). The bargaining problem. Econometrics , 18, 155–162.
(2007). What is web 2.0: Design patterns and business models for the next generation of software. International Journal of Digital Economics , 65, 17–37.
(2005). Organizing for information retrieval in transactive memory systems. Communication Research , 32, 726–761.
(2000). Testing various types of cooperation rewards in social dilemmas. Group Processes and Intergroup Relations , 3, 339–350.
(2003). The personal norm of reciprocity. European Journal of Personality , 17, 251–283.
(2008). Perceptions of social loafing in online learning groups: A study of public university and US Naval War college students. International Review of Research in Open and Distance Learning , 9, 1–17.
(1993). Electronic bulletin boards and “public goods” explanations of collaborative mass media. Communication Research , 20, 277–297.
(1993). Incremental contribution in step-level public goods games with asymmetric players. Organizational Behavior and Human Decision Processes , 55, 171–194.
(1995). A social identity model of deindividuation phenomena. In W. Stroebe & M. Hewstone (Eds.), European Review of Social Psychology (Vol. 6, pp. 161–197). Chichester: Wiley.
(1996). The messaging threshold in computer-mediated communication. Ergonomics , 39, 1017–1037.
(2004). The relationship between self-presentation styles and coping with social stress. Anxiety, Stress, and Coping , 17, 1–22.
(2006). Psychological barriers: Lurker and poster motivation and behavior in online communities. Communications of the Association for Information Systems , 18, 329–354.
(2007). Knowledge transfer by sharing task templates: Two approaches and their psychological requirements. Knowledge Management Research and Practice , 5, 287–296.
(1967). A new scale for the measurement of interpersonal trust. Journal of Personality , 35, 651–665.
(1971). Generalized expectancy for interpersonal trust. American Psychologist , 26, 443–452.
(1980). Interpersonal trust, trust worthiness and gullibility. American Psychologist , 35, 1–7.
(1995). Conversation and cooperation in social dilemmas. A meta-analysis of experiments from 1958 to 1992. Rationality and Society , 7, 58–92.
(1986). Alternative structural solutions to resource dilemmas. Organizational Behavior and Human Decision Processes , 37, 139–155.
(1954). The pure theory of public expenditure. Review of Economics and Statistics , 36, 387–389.
(2004). Entwicklung eines Anreizsystems zur Unterstützung kollaborativ verteilter Formen der Aneignung und Produktion von Wissen in der Ausbildung. In D. Carstensen & B. Barrios (Hrsg.), Campus 2004. Kommen die digitalen Medien an den Hochschulen in die Jahre? Medien in der Wissenschaft (S. 255–264). Münster: Waxmann.
(1993). Productivity loss in performance groups: A motivational analysis. Psychological Bulletin , 113, 67–81.
(2010). Exploring and mitigating social loafing in online communities. Computers in Human Behavior , 26, 768–777.
(1983a). Cooperative learning . New York: Longman.
(1983b). When does cooperative learning increase student achievement? Psychological Bulletin , 94, 429–445.
(1984). Students motivating students to excel: Cooperative incentives, cooperative tasks, and student achievement. Elementary School Journal , 85, 53–64.
(1988). Student team learning: An overview and practical guide . Washington, D.C.: National Education Association.
(1994). Conformity as a determinant of behaviour in a resource dilemma. The Journal of Social Psychology , 134, 191–200.
(1974). Self-monitoring of expressive behavior. Journal of Personality and Social Psychology , 30, 526–537.
(2010). Förderung selbstregulierten Lernens im schulischen Kontext. Zeitschrift für Pädagogische Psychologie , 24, 171–175.
(1997). Atheism, sex and databases: The net as a social technology. In S. Kiesler (Ed.), Culture of the Internet (pp. 35–52). Mahwah, NJ: Erlbaum.
(1995). Expert roles and information exchange during discussion: The importance of knowing who knows what. Journal of Experimental Social Psychology 31, 244–265.
(1989). Information sampling in structured and unstructured discussions of three- and six-person groups. Journal of Personality and Social Psychology , 57, 67–78.
(1985). Pooling of unshared information in group decision making: Biased information sampling during discussion. Journal of Personality and Social Psychology , 48, 1467–1478.
(2003). Hidden profiles: A brief history. Psychological Inquiry , 14, 304–313.
(2001). Die schweigende Mehrheit – «Lurker» in internetbasierten Diskussionsforen. Zeitschrift für Soziologie , 30, 48–64.
(1997). Social comparison in the workplace: A study of 60 dual-career couples. Personality and Social Psychology Bulletin , 23, 427–438.
(1979). An integrative theory of intergroup conflict. In W. G. Austin & S. Worchel (Eds.), The social psychology of intergroup relations (pp. 33–47). Monterey: Brooks/Cole Publ.
(1986). The social identity theory of intergroup behavior. In S. Worchel & W. G. Austin (Eds.), Psychology of intergroup relations (pp. 7–24). Chicago: Nelson-Hall Publishers.
(2011). Should I e-collaborate with this group? A multilevel model of usage intentions. Information & Management , 48, 62–68.
(1974). Judgment under uncertainty: Heuristics and biases. Science ,185, 1124–1130.
.(1995). Coordination rules in asymmetric social dilemmas: A comparison between public good dilemmas and resource dilemmas. Journal of Experimental Social Psychology , 31, 1–27.
(1997). Development of prosocial, individualistic, and competitive orientations: Theory and preliminary evidence. Journal of Personality and Social Psychology , 73, 733–746.
(1998). The boundaries of reciprocal cooperation. European Journal of Social Psychology , 28, 847–855.
(2007). Context effects in games: Local versus global sequential effects on choice in the prisoner's dilemma game. Judgment and Decision Making , 2, 380–389.
(2000). “It is what one does”: Why people participate and help others in electronic communities of practice. Journal of Strategic Information Systems , 9, 155–173.
(1987). Transactive memory: A contemporary analysis of the group mind. In B. Mullen & G. R. Goethals (Eds.), Theories of group behavior (pp. 185–208). New York: Springer.
(1995). A computer network model of human transactive memory. Social Cognition , 13, 319–339.
(1985). Cognitive interdepenence in close relationships. In W. J. Ickes (Ed.), Compatible and incompatible relationships (pp. 253–276). New York: Springer-Verlag.
(1995). Transactive memory. In A. S. R. Manstead & M. Hewstone (Eds.), The Blackwell Encyclopedia of Social Psychology (pp. 654–656). Oxford: Blackwell.
(2009). Inquiry Learning. Zeitschrift für Pädagogische Psychologie , 23, 117–127.
(2003). Datenbanken und Wissensmanagement – ein Fallbeispiel. Arbeit – Zeitschrift für Arbeitsforschung, Arbeitsgestaltung und Arbeitspolitik , 12, 70–74.
(2004). Lässt sich Wissen durch Datenbanken managen? Motivationale und organisatorische Voraussetzungen beim Einsatz elektronischer Datenbanken. In T. Edeling, W. Jann, & D. Wagner (Hrsg.), Wissensmanagement in Politik und Verwaltung (S. 113–129). Wiesbaden: VS Verlag.
(2009). The absence of cooperation is not necessarily defection: Structural and motivational constraints of knowledge transfer in a social dilemma situation. Organization Studies , 30, 1141–1164.
(2011). Does the type of anonymity matter? The impact of visualization on information sharing in online groups. Cyberpsychology, Behavior, and Social Networking , 14, 157–160.
(1986). Getting along and getting ahead: Empirical support for a theory of protective and acquisitive self-presentation. Journal of Personality and Social Psychology , 50, 356–361.
(2005). Dynamic influences of culture on cooperation in the prisoner‘s dilemma. Psychological Science , 16, 429–434.
(1971). Dimensions of sensation seeking. Journal of Consulting and Clinical Psychology , 36, 45–52.
(1979). Sensation seeking: Beyond the optimal level of arousal . Hilsdale, NJ: Erlbaum.
(1984). Sensation seeking: A comparative approach to a human trait. Behavioral and Brain Sciences ,s 7, 413–471.